IPAC2017 - Classification: 07 Accelerator Technology / T31 Subsystems, Technology and Components, Other

Paper	Title	Page
THPIK080	Magnetic Performance of the New ALBA Magnetic Measurements Bench for Closed Structures	4269
	J. Campmany, L.G.O. Garcia-Orta, J. Marcos, V. Massana ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	ALBA has designed and built a new magnetic measurement bench for closed structures, presented elsewhere. This bench has been fully built in-house and has been magnetically characterized at ALBA, showing excellent performance in terms of repeatability and accuracy. In the case of homogeneous fields, the accuracy reaches 10 microTesla, and in the case of undulators characterization, the accuracy of period determination reach 0.5 microns and the field accuracy is 60 microTesla. After this characterization, the bench has been moved to CIEMAT premises, and has been used to magnetically characterize the superconducting magnet of the AMIT cyclotron. In this paper we present the results of magnetic characterization of the bench as well as the first results of cyclotron measurements.
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THPIK124	Using Conductive Nanoparticles to Reduce the Surface Charging of Ceramics	4392
	M.L. Neubauer, A. Dudas Muons, Inc, Illinois, USA F. Marhauser JLab, Newport News, Virginia, USA
	Beam pipe ceramics used for various purposes suffer from the problem of surface charging in the presence of an electron beam. A novel technique has been proposed for a method for reducing the charging effects by filling nano sized pores in the ceramic with a conductive medium. Pores in ceramics can be formed in a chain with varying depths depending on sintering temperatures and methods for creating the pores. In the pre-formed condition of these novel ceramics, a nanoparticle slurry is infused by capillary action into the ceramic and fired at temperatures and atmospheres to stabilize the conductive medium inside the ceramic. The microwave characteristics of these ceramics will be investigated in a Phase I program with the design of a complete beam pipe lossy ceramic in a Phase II.
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THPVA039	Nanopositioning and Actuation in Extreme Environment Using Piezoelectric Multilayer Actuators and Motors	4519
	C. Mangeot Noliac A/S, Kvistgaard, Denmark
	Piezoelectric devices find numerous applications in Science projects, when precise and fast positioning is needed, particularly in harsh environment. This paper reviews some of the latest environmental tests performed on piezoelectric devices, illustrating how they enable higher performance or even new technical solutions. In the field of particle accelerators and instrumentation, two applications can be mentioned: the precise goniometer to be installed in the Large Hadron Collider (LHC) and active Lorentz force detuning compensation systems. Multilayer actuators have been demonstrated over a wide range of temperatures, from cryogenic (4K) to 220°C, in UHV and under radiation. Other examples can be mentioned within the ITER project: the In-Vessel Viewing System (IVVS) and the Electron Cyclotron Emission (ECE) diagnostic. For these applications, a piezo motor is needed. The Piezo Actuator Drive (PAD) was demonstrated at high temperature, UHV and submitted to high magnetic fields. P. Bosland et al.; 'Mechanical study of the Saclay Piezo Tuner PTS (Piezo Tunning System)', CARE-Note-2005-004-SRF ** G. Taylor et al.; 'Status of the design of the ITER ECE diagnostic', EC18, 2015
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THPVA040	Magnetic Field Computation for PMTs Shielding Optimization	4522
	E. Bouquerel, O. Dorvaux, S. Kihel, M. Krauth, P. Peaupardin IPHC, Strasbourg Cedex 2, France C. Ciemala IFJ-PAN, Kraków, Poland
	The Photon Array for the studies of Radioactive and Ion Stable beams (PARIS) is a multidetector of clusters. Each cluster is composed of 9 units of two-shells phoswiches of LaBr3/NaI scintillators optically coupled to one photomultiplier tube. PARIS will be used in combination with the VAMOS spectrometer at GANIL. During the experiment, PMTs will be exposed to the constant magnetic fringe fields produced by a quadrupole. Magnetic shielding is essential to efficiently lower the magnetic field inside the PMTs. The design and the optimization of this shield is presented. A comparison is done between the simulated and the experimental values.
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THPVA042	Semi-Autonomous Device for Visual Inspection of Vacuum Beamlines of Particle Accelerators	4528
	N. Schweizer Technische Universität Darmstadt (TU Darmstadt, RMR), Darmstadt, Germany I. Pongrac GSI, Darmstadt, Germany
	Due to the closed structure of ultra-high vacuum beamline systems, a visual inspection of the internal pipe is hardly feasible. For instance, when opening the accelerator vacuum system, an endoscope can be used to inspect the internals. However, this proves to be impractical in case of large, curved accelerator vacuum systems with complex geometries. It is more efficient to open the system only at one or two locations and to use a mobile semi-autonomous inspection device with optical imaging. A mobile robot is currently under development in our laboratory for the planned heavy ion synchrotron SIS100 at FAIR. A multitude of vacuum chamber types with different height levels as well as gaps must be traversed reliably by the robot. We present a modular wheel-based mobile robot prototype with joints between the modules which let the robot climb to different height levels by lifting the modules successively.
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THPVA044	Detector Structure Development Using Active And Passive Thermography	4531
	E. Rosenthal, D. Grunwald, G. Natour Forschungszentrum Jülich GmbH, Central Institute of Engineering, Electronics and Analytics, Jülich, Germany
	During the development and production of the mechanical support structures of the PANDA-Micro-Vertex-Detector(MVD)* experiments of passive and active thermography were applied and shown. The combination of mostly carbon-based materials enables the development of lightweight structures, which satisfy the mechanical stability and thermal requirements. The carrier structure of the MVD stripe detector is mainly composed of carbon foams, high fiber content CFC materials and PMI-based foams. This enables to selectively cool areas where heat is generated and to decouple them from the temperature-sensitive areas of the sensor system. Passive thermography is used during our development work mainly to validate the results of thermal simulations, for design optimization and for the functional control of the carrier structure. Additionally active thermography allows us to identify anomalies and thermal disturbances, which remain unnoticed in static processes. Also the investigation and characterization of adhesive layers are possible. For this purpose we developed special software algorithms which are sensitive to small-scale differences in temperature conductivity. * PANDA Collaboration: W. Erni et al., arXiv: 1207.6581
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THPVA046	Thermo Mechanical Study of the ESS DTL	4537
	P. Mereu, M. Mezzano, C. Mingioni, M. Nenni INFN-Torino, Torino, Italy F. Grespan, A. Palmieri, A. Pisent INFN/LNL, Legnaro (PD), Italy
	The Drift Tube Linac (DTL) of the European Spallation Source (ESS) is designed to operate at 352.2 MHz with a duty cycle of 4 % (3 ms pulse length, 14 Hz repetition period) and will accelerate a proton beam of 62.5 mA pulse peak current from 3.62 to 90 MeV. In this paper the main issues regarding the thermo-mechanical 3D details of the DTL are addressed and a Computational Fluid Dynamics (CFD) model is proposed and validated against the experimental data. The results of these simulations are used to properly design the DTL cooling system.
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THPVA048	Design and Progress on Mechanical & Alignment System for HEPS-TF	4544
	C. H. Li, S.J. Li, J. Liu, H. Wang, X.L. Wang, Z. Wang, L. Wu IHEP, Beijing, People's Republic of China
	HEPS is a new generation synchrotron facility with a stringent requirement of very low emmittance. The key technology difficulties are supposed be overcome during the HEPS-TF stage. There are two projects in progress for mechanical and alignment system. One is the development of precision auto-tuning magnet girder, to meet the requirement of beam based alignment in tunnel, the other is the study on vibrating-wire alignment technique to improve alignment accuracy of magnets on a girder. This paper will describe the design and progress of both projects.
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THPVA049	Introduction About Key Techniques of Critical Equipment in CSNS	4548
	L. Kang, H.Y. He, L. Liu, X.J. Nie, A.X. Wang, G.Y. Wang, J.B. Yu, J.S. Zhang, D.H. Zhu IHEP, Beijing, People's Republic of China J.X. Chen, C.J. Ning, Y.J. Yu CSNS, Guangdong Province, People's Republic of China
	Funding: National Natural Science Foundation of China (Grant Nos.11375217) The China Spallation Neutron Source (CSNS) is the complex consists of a negative hydrogen linear accelerator, a rapid cycling proton synchrotron (RCS) accelerating the beam to 1.6 GeV energy, a solid target station, and instruments for spallation neutron applications. Some equipment which work in high radiation zone, such as beam dumps, collimators, proton beam window and so on, should contain the performance of long lifetime, high vacuum, and remote maintenance easily. This paper mainly introduce some key techniques in these equipment, firstly quick-release remote clamp and remote maintenance tool in collimators and proton beam window will be introduced, then some key brazing techniques in processing of these equipment will also be mentioned. Vibration online monitoring system and other key techniques will be showed finally.
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THPVA050	Latest Progress of Magnet Girder Prototypes for HEPS-TF	4551
	H. Wang, C. H. Li, S.J. Li, H. Qu, Z. Wang, L. Wu IHEP, Beijing, People's Republic of China
	The magnet girder technology is one of the key tech-nologies which should be overcome in the stage of HEPS-TF (Test Facility of High Energy Photon Source). The girder should be beam-based aligned, and must has high adjusting precision and high stability as well. For these issues, two girder systems are designed and developed. This paper will describe the latest progress of the girder prototypes, including structure design updates, control system progress, and processing and assembling of Girder I prototype.
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THPVA051	Vibration Study of Magnet Girder of the HEPS-TF	4554
SUSPSIK114	use link to see paper's listing under its alternate paper code
	Z. Wang, C. H. Li, H. Qu, H. Wang IHEP, Beijing, People's Republic of China
	Abstract: There are stringent requirements on beam stability in the High Energy Photon Source (HEPS). The stability of the magnet girder is an extremely important factor for the beam stability. This paper will discuss the influence of ground vibration to the beam stability. This influence will determine the scope of the vibration magnification of the magnet girder. By improving the stiffness of the magnet girder, the influence will be reduced and the beam stability shall be improved. Besides, the progress of the HEPS-TF girder prototype and the vibration test will be described.
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THPVA052	Preliminary Design of Magnet Support System for CEPC	4557
	H. Wang, H. Qu, J.L. Wang, Z. Wang, N. Zhou IHEP, Beijing, People's Republic of China
	Magnet support system is important for CEPC. For the 100 km design of CEPC, there will be thousands of mag-nets and their supports in both collider and booster. Espe-cially, the booster ring is above the collider in the space, the magnets are hung by the supports. The goals of mag-net supports are simple and flexible structure, minimizing the magnet deformation, good stability, low cost and so on. This paper will describe the preliminary design of magnet support system, the optimization to minimize the magnet deformation and the topology optimization of the frame structure in booster.
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THPVA053	Design of the Girder Control System for HEPS-TF	4560
	S.J. Li, C. H. Li, J. Liu, H. Wang, Z. Wang IHEP, Beijing, People's Republic of China
	To make the alignment become easier, the HEPS-TF (High Energy Photon Source-Test Facility) magnet girder, which is different from the conventional one, is designed to achieve the goal of adjusting the girder's position and orientation online. The control system is one of the key sub-part. This Paper will describe the control system design, especially on the hardware configuration, software programming as well as user interface design.
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THPVA054	Research of the Chinese Spallation Neutron Source Stripper Foil	4562
	J.X. Chen CSNS, Guangdong Province, People's Republic of China L. Kang, J.B. Yu IHEP, Beijing, People's Republic of China
	Funding: This research was financially supported by the National Natural Science Foundation of China No.11375217. In the injection process of spallation neutron source, the effect of the stripper foil is extremely critical, which is the key equipment to realize the conversion of negative hydrogen ions into proton injection. This paper mainly introduces the research of Chinese Spallation Neutron Source (CSNS) stripper foil. The CSNS stripper foil is a diamond-like carbon (DLC) foil with a thickness of 100 micrograms per square centimetre. This paper introduces the study of the thickness of the CSNS stripper foil, the installation method and the installation process in the tunnel site. Simultaneously, the influence of the gas flow rate of the vacuum chamber on the vibration of the foils is simulated. In the end of this paper, the research plan and follow-up of the experimental equipment of the stripper foil are introduced.
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THPVA057	The Primary Control Network of HLS II	4573
	W. Wang, L. Lin, F.F. Wu, Q. Zhang USTC/NSRL, Hefei, Anhui, People's Republic of China
	To meet the accuracy requirement of alignment and installation of HLS', the high accuracy control network is necessary. The high accuracy primary control network will provides reliable reference to the local control network. After optimization design that using Monte-Carlo method, according to the structure characteristic of HLS', the primary control network is measured by several different instruments, such as: Laser tracker, Total station and plummet. The accuracy of actual primary control network meets the design requirements, it provides strong foundation for subsequent project.
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THPVA059	Development of a New High Power RF Window for S-band Linac	4576
	W.H. Hwang, J.Y. Choi, Y.D. Joo, S.H. Kim, B.-J. Lee PAL, Pohang, Kyungbuk, Republic of Korea S.J. Roh Vitzrotech Co., Ltd., Ansan City, Kyunggi-Do, Republic of Korea
	A prototype rf window was developed in collaboration with Pohang Accelerator Laboratory (PAL) and domestic companies. The PAL designed the S-band TE012 rf window and conducted the high power performance tests of single rf window to verify the operation characteristics for the application to the PLSII Linac. The test was performed in the in-situ facility consisting of a modulator, klystron, waveguide network, vacuum system, cooling system, and rf analyzing equipment. As the test results with SLED, no breakdown appeared up to 75 MW peak power with 4.5 micro-seconds rf pulse width at a repetition rate of 10 Hz. The test results with the current operation level of PLSII Linac confirms that the rf window well satisfies the criteria of PLS Linac operation.
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THPVA060	Technical Overview of Inter-Undulator Support System for PAL XFEL	4579
	H.-G. Lee, S.-H. Jeong, Y.G. Jung, H.-S. Kang, D.E. Kim, S.B. Lee, B.G. Oh, K.-H. Park, H.S. Suh PAL, Pohang, Kyungbuk, Republic of Korea
	Pohang Accelerator Laboratory (PAL) has been developing a SASE X-ray Free Electron Laser based on 10 GeV linear accelerator. The inter-Undulator (IU) support system was developed to be used in the intersections of the Undulator Systems. The IU supports consist of phase shifter, quadrupole magnet with mover, beam loss monitor, cavity BPM with mover, two corrector magnets and vacuum components. The adjusting mechanism of IU Support has manual alignment system to be easily adjusting the component. The mover of quadruple magnet and cavity BPM with submicron repeatability has auto-adjusting systems with stepping motor. The mover main specifications include compact dimensions and a ±1.5 mm stroke in the vertical and horizontal direction. Linear motion guide based on 5-phase stepping motors have been chosen. This paper describes the design of the stages used for precise movement and results of mechanical measurements including reproducibility will be reported.
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THPVA061	Study of the Cooling and Vacuum Systems of a Miniature 12 MeV Race-Track Microtron	4582
	Yu.A. Kubyshin, X. Escaler, A. Viladomiu UPC, Barcelona, Spain V.I. Shvedunov SINP MSU, Moscow, Russia
	With the aim of optimization, numerical simulations of the cooling and vacuum systems of a compact 12 MeV race-track microtron (RTM) which is under construction at the Technical University of Catalonia have been carried out. The hydraulic and thermal performance of the cooling system for various flow rates has been studied using the Computational Fluid Dynamics (CFD) software. A CFD model, previously validated with experimental pressure loss results, has permitted to simulate the cooling fluid temperature, inner wall temperatures and heat trans-fer coefficients at different sections of the RTM accelerating structure. Conclusions concerning the current design and its possible optimization are discussed. Simulations of the RTM high vacuum conditions have been performed using the Monte-Carlo simulation package Molflow+. The pressure in the vacuum chamber, pumping tube conductance and maximum allowed throughput have been calculated. Also results of the vacuum chamber pumping out sessions are reported.
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THPVA065	Working Concept of 12.5 kW Tuning Dump at ESS	4591
	Y. Lee, M. Eshraqi, S. Ghatnekar Nilsson, Y.I. Levinsen, R. Miyamoto, S. Molloy, M. Möller, A. Olsson, T.J. Shea, C.A. Thomas, M. Wilborgsson ESS, Lund, Sweden F. Sordo ESS Bilbao, Zamudio, Spain
	The linac system at the European Spallation Source (ESS) will deliver 2~GeV protons at 5~MW beam power. The accelerated protons from the linac will be transported to the rotating tungsten target by two bending magnets. A tuning beam dump will be provided at the end of the linac, downstream of the first bending magnet. This tuning dump shall be able to handle at least 12.5 kW of beam power. In this paper, we present the working concept of the tuning dump. The impact of the proton beam induced material damage on the operational loads and service lifetime of the tuning dump is analysed. A number of particle transport and finite-element simulations are performed for the tuning beam modes.
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THPVA066	TPS LINAC Temperature Monitoring System	4595
	C.L. Chen, H.-P. Chang, C.-S. Fann, K.-K. Lin, K.L. Tsai NSRRC, Hsinchu, Taiwan
	TPS Linac has been providing with electron beams which conform to the specifications to the requirement since 2014. Firstly electrons are extracted from electron gun (e-gun), and they are accelerated and gained energy from 90 keV to 150 MeV in three linear accelerating sections. Then electron beams are successfully injected to the booster ring via Linac to Booster (LTB) transport line. Providing a stable and reliable operating system is next priority objective and so a temperature monitoring system is established. This temperature monitoring system is used to monitor the temperatures for each Linac sub-system and its surrounding environment. By using this temperature monitoring system, it helps to understand the relation between beam energy and working temperature for each sub-system, when Linac is under normal operation. This report will detail the temperature monitoring components, including thermalcouples, PLC thermal modules, PLC programming and graphic user interface (GUI). By integrating with EPICS, this monitoring system is becoming a complete solution for ensuring any possible influence due to thermal effects.
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THPVA067	Observation of Beam Disturbance Caused by ID Gap Variation at TLS Storage Ring	4598
	H.C. Chen, C.L. Chen, H.H. Chen, C.H. Kuo, Y.K. Lin NSRRC, Hsinchu, Taiwan
	Insertion device is controlled by user for specific experimental condition on user beam time. It operates with user defined gap and phase. Three different undulators are installed in TLS (Taiwan Light Source), including one elliptically polarized undulator. Interactions between these undulators were studied to demonstrate the impact on beam performance. How to get more stable beam under undulators' interaction is discussed in this study.
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THPVA068	General Design of ID Front Ends in the TPS	4601
	C.K. Kuan, C.K. Chan, Y.T. Cheng, J. -Y. Chuang, Y.M. Hsiao, I.C. Sheng, C. Shueh, H.Y. Yan NSRRC, Hsinchu, Taiwan
	The Taiwan Photon Source is a 3 GeV, 3rd generation synchrotron radiation source at the NSRRC. Phase-I commissioning includes seven Insertion Device (ID) Front Ends which are built to transmit intense synchro-tron radiation generated by In-vacuum Undulators and Elliptically Polarizing Undulators in the storage ring to the Photon Beamline. The total power and power distri-bution on Front End components is calculated and ana-lysed and Finite Element Analysis is used to verify the thermal performance under high heat loads while Monte-Carlo methods are utilized to simulate the vacuum pres-sure distribution. All apertures of the components are the same to simplify and standardize the design of the Front Ends. This paper describes main design considerations, especially the high heat load and vacuum pressure distri-bution.
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THPVA070	Cooling and Thermo Stabilization System of 100MeV/100kW Electron Linear Accelerator of Neutron Source Driver	4607
SUSPSIK115	use link to see paper's listing under its alternate paper code
	M. Moisieienko, I.M. Karnaukhov, A. Mytsykov, A.Y. Zelinsky NSC/KIPT, Kharkov, Ukraine
	Cooling system and temperature control technology elements of the linear electron accelerator of 100 MeV/100kW is a complex technological system composed of three subsystems: the cooling klystron gallery equipment (30 C ± 1), cooling of the accelerator tunnel equipment (30 C ± 1) and the cooling and temperature control accelerating sections and waveguide (40 ° C ± 0,2). The block diagram of cooling and temperature control of the linear electron accelerator of 100 MeV/100 kW, describes the basic principles to formulate requirements to the cooling systems. It describes the status of the installation, commissioning and testing of the cooling and temperature control of the accelerator - driver subcritical neutron source KIPT.
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THPVA073	Latest Results on Fast Kicker for g-2 E-989 Experiment at Fermilab	4616
	A.A. Mikhailichenko, D. L. Rubin Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
	We are describing the latest results on fabrication and measurements of kicker and pulser and beam dynamics in E-989 experiment at FERMILAB on precise measurement of anomalous magnetic moment of muon.
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THPVA104	Design of New Spectrum Data Acquisition System	4707
	Z.X. Shao, H. Gao, W. Liu, C.Y. Pan USTC/NSRL, Hefei, Anhui, People's Republic of China
	Funding: Project supported by the National Basic Research Program of China, the National Key Scientific Instrument and Equipment Development Projects, China (2014YQ120351). To solve the problem of spectrum acquisition in LIBS (Laser-Induced Breakdown Spectroscopy), a real-time data acquisition system was designed based on PSoC (Programmable System-On-Chip). First, the linear array CCD with electronic shutter function TCD1304DG has been used as detector .And then, the AD7621, a 16-bit analog-to-digital converter, was used to convert signal from the AFE (Analog Front End). After that, a high-integrated, low-power PSoC5LP was used as core controller, it works to complete the driver and data communication, including CCD , ADC, FIFO, the USB interface, etc. At last, a WIFI module has been added to the system for the convenience of users as well as follow-up research. The result through board-level testing indicates that the system in the spectrum acquisition is stable and accurate, and the indicators meet the LIBS project requirements.
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Paper

Title

Page

Magnetic Performance of the New ALBA Magnetic Measurements Bench for Closed Structures

4269

J. Campmany, L.G.O. Garcia-Orta, J. Marcos, V. Massana
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

ALBA has designed and built a new magnetic measurement bench for closed structures, presented elsewhere. This bench has been fully built in-house and has been magnetically characterized at ALBA, showing excellent performance in terms of repeatability and accuracy. In the case of homogeneous fields, the accuracy reaches 10 microTesla, and in the case of undulators characterization, the accuracy of period determination reach 0.5 microns and the field accuracy is 60 microTesla. After this characterization, the bench has been moved to CIEMAT premises, and has been used to magnetically characterize the superconducting magnet of the AMIT cyclotron. In this paper we present the results of magnetic characterization of the bench as well as the first results of cyclotron measurements.

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THPIK124

Using Conductive Nanoparticles to Reduce the Surface Charging of Ceramics

4392

M.L. Neubauer, A. Dudas
Muons, Inc, Illinois, USA
F. Marhauser
JLab, Newport News, Virginia, USA

Beam pipe ceramics used for various purposes suffer from the problem of surface charging in the presence of an electron beam. A novel technique has been proposed for a method for reducing the charging effects by filling nano sized pores in the ceramic with a conductive medium. Pores in ceramics can be formed in a chain with varying depths depending on sintering temperatures and methods for creating the pores. In the pre-formed condition of these novel ceramics, a nanoparticle slurry is infused by capillary action into the ceramic and fired at temperatures and atmospheres to stabilize the conductive medium inside the ceramic. The microwave characteristics of these ceramics will be investigated in a Phase I program with the design of a complete beam pipe lossy ceramic in a Phase II.

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THPVA039

Nanopositioning and Actuation in Extreme Environment Using Piezoelectric Multilayer Actuators and Motors

4519

C. Mangeot
Noliac A/S, Kvistgaard, Denmark

Piezoelectric devices find numerous applications in Science projects, when precise and fast positioning is needed, particularly in harsh environment. This paper reviews some of the latest environmental tests performed on piezoelectric devices, illustrating how they enable higher performance or even new technical solutions. In the field of particle accelerators and instrumentation, two applications can be mentioned: the precise goniometer to be installed in the Large Hadron Collider (LHC) and active Lorentz force detuning compensation systems*. Multilayer actuators have been demonstrated over a wide range of temperatures, from cryogenic (4K) to 220°C, in UHV and under radiation. Other examples can be mentioned within the ITER project: the In-Vessel Viewing System (IVVS) and the Electron Cyclotron Emission (ECE) diagnostic**. For these applications, a piezo motor is needed. The Piezo Actuator Drive (PAD) was demonstrated at high temperature, UHV and submitted to high magnetic fields.
* P. Bosland et al.; 'Mechanical study of the Saclay Piezo Tuner PTS (Piezo Tunning System)', CARE-Note-2005-004-SRF
** G. Taylor et al.; 'Status of the design of the ITER ECE diagnostic', EC18, 2015

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THPVA040

Magnetic Field Computation for PMTs Shielding Optimization

4522

E. Bouquerel, O. Dorvaux, S. Kihel, M. Krauth, P. Peaupardin
IPHC, Strasbourg Cedex 2, France
C. Ciemala
IFJ-PAN, Kraków, Poland

The Photon Array for the studies of Radioactive and Ion Stable beams (PARIS) is a multidetector of clusters. Each cluster is composed of 9 units of two-shells phoswiches of LaBr3/NaI scintillators optically coupled to one photomultiplier tube. PARIS will be used in combination with the VAMOS spectrometer at GANIL. During the experiment, PMTs will be exposed to the constant magnetic fringe fields produced by a quadrupole. Magnetic shielding is essential to efficiently lower the magnetic field inside the PMTs. The design and the optimization of this shield is presented. A comparison is done between the simulated and the experimental values.

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THPVA042

Semi-Autonomous Device for Visual Inspection of Vacuum Beamlines of Particle Accelerators

4528

N. Schweizer
Technische Universität Darmstadt (TU Darmstadt, RMR), Darmstadt, Germany
I. Pongrac
GSI, Darmstadt, Germany

Due to the closed structure of ultra-high vacuum beamline systems, a visual inspection of the internal pipe is hardly feasible. For instance, when opening the accelerator vacuum system, an endoscope can be used to inspect the internals. However, this proves to be impractical in case of large, curved accelerator vacuum systems with complex geometries. It is more efficient to open the system only at one or two locations and to use a mobile semi-autonomous inspection device with optical imaging. A mobile robot is currently under development in our laboratory for the planned heavy ion synchrotron SIS100 at FAIR. A multitude of vacuum chamber types with different height levels as well as gaps must be traversed reliably by the robot. We present a modular wheel-based mobile robot prototype with joints between the modules which let the robot climb to different height levels by lifting the modules successively.

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THPVA044

Detector Structure Development Using Active And Passive Thermography

4531

E. Rosenthal, D. Grunwald, G. Natour
Forschungszentrum Jülich GmbH, Central Institute of Engineering, Electronics and Analytics, Jülich, Germany

During the development and production of the mechanical support structures of the PANDA-Micro-Vertex-Detector(MVD)* experiments of passive and active thermography were applied and shown. The combination of mostly carbon-based materials enables the development of lightweight structures, which satisfy the mechanical stability and thermal requirements. The carrier structure of the MVD stripe detector is mainly composed of carbon foams, high fiber content CFC materials and PMI-based foams. This enables to selectively cool areas where heat is generated and to decouple them from the temperature-sensitive areas of the sensor system. Passive thermography is used during our development work mainly to validate the results of thermal simulations, for design optimization and for the functional control of the carrier structure. Additionally active thermography allows us to identify anomalies and thermal disturbances, which remain unnoticed in static processes. Also the investigation and characterization of adhesive layers are possible. For this purpose we developed special software algorithms which are sensitive to small-scale differences in temperature conductivity.
* PANDA Collaboration: W. Erni et al., arXiv: 1207.6581

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THPVA046

Thermo Mechanical Study of the ESS DTL

4537

P. Mereu, M. Mezzano, C. Mingioni, M. Nenni
INFN-Torino, Torino, Italy
F. Grespan, A. Palmieri, A. Pisent
INFN/LNL, Legnaro (PD), Italy

The Drift Tube Linac (DTL) of the European Spallation Source (ESS) is designed to operate at 352.2 MHz with a duty cycle of 4 % (3 ms pulse length, 14 Hz repetition period) and will accelerate a proton beam of 62.5 mA pulse peak current from 3.62 to 90 MeV. In this paper the main issues regarding the thermo-mechanical 3D details of the DTL are addressed and a Computational Fluid Dynamics (CFD) model is proposed and validated against the experimental data. The results of these simulations are used to properly design the DTL cooling system.

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THPVA048

Design and Progress on Mechanical & Alignment System for HEPS-TF

4544

C. H. Li, S.J. Li, J. Liu, H. Wang, X.L. Wang, Z. Wang, L. Wu
IHEP, Beijing, People's Republic of China

HEPS is a new generation synchrotron facility with a stringent requirement of very low emmittance. The key technology difficulties are supposed be overcome during the HEPS-TF stage. There are two projects in progress for mechanical and alignment system. One is the development of precision auto-tuning magnet girder, to meet the requirement of beam based alignment in tunnel, the other is the study on vibrating-wire alignment technique to improve alignment accuracy of magnets on a girder. This paper will describe the design and progress of both projects.

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THPVA049

Introduction About Key Techniques of Critical Equipment in CSNS

4548

L. Kang, H.Y. He, L. Liu, X.J. Nie, A.X. Wang, G.Y. Wang, J.B. Yu, J.S. Zhang, D.H. Zhu
IHEP, Beijing, People's Republic of China
J.X. Chen, C.J. Ning, Y.J. Yu
CSNS, Guangdong Province, People's Republic of China

Funding: National Natural Science Foundation of China (Grant Nos.11375217)
The China Spallation Neutron Source (CSNS) is the complex consists of a negative hydrogen linear accelerator, a rapid cycling proton synchrotron (RCS) accelerating the beam to 1.6 GeV energy, a solid target station, and instruments for spallation neutron applications. Some equipment which work in high radiation zone, such as beam dumps, collimators, proton beam window and so on, should contain the performance of long lifetime, high vacuum, and remote maintenance easily. This paper mainly introduce some key techniques in these equipment, firstly quick-release remote clamp and remote maintenance tool in collimators and proton beam window will be introduced, then some key brazing techniques in processing of these equipment will also be mentioned. Vibration online monitoring system and other key techniques will be showed finally.

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THPVA050

Latest Progress of Magnet Girder Prototypes for HEPS-TF

4551

H. Wang, C. H. Li, S.J. Li, H. Qu, Z. Wang, L. Wu
IHEP, Beijing, People's Republic of China

The magnet girder technology is one of the key tech-nologies which should be overcome in the stage of HEPS-TF (Test Facility of High Energy Photon Source). The girder should be beam-based aligned, and must has high adjusting precision and high stability as well. For these issues, two girder systems are designed and developed. This paper will describe the latest progress of the girder prototypes, including structure design updates, control system progress, and processing and assembling of Girder I prototype.

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THPVA051

Vibration Study of Magnet Girder of the HEPS-TF

4554

SUSPSIK114

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Z. Wang, C. H. Li, H. Qu, H. Wang
IHEP, Beijing, People's Republic of China

Abstract: There are stringent requirements on beam stability in the High Energy Photon Source (HEPS). The stability of the magnet girder is an extremely important factor for the beam stability. This paper will discuss the influence of ground vibration to the beam stability. This influence will determine the scope of the vibration magnification of the magnet girder. By improving the stiffness of the magnet girder, the influence will be reduced and the beam stability shall be improved. Besides, the progress of the HEPS-TF girder prototype and the vibration test will be described.

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THPVA052

Preliminary Design of Magnet Support System for CEPC

4557

H. Wang, H. Qu, J.L. Wang, Z. Wang, N. Zhou
IHEP, Beijing, People's Republic of China

Magnet support system is important for CEPC. For the 100 km design of CEPC, there will be thousands of mag-nets and their supports in both collider and booster. Espe-cially, the booster ring is above the collider in the space, the magnets are hung by the supports. The goals of mag-net supports are simple and flexible structure, minimizing the magnet deformation, good stability, low cost and so on. This paper will describe the preliminary design of magnet support system, the optimization to minimize the magnet deformation and the topology optimization of the frame structure in booster.

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THPVA053

Design of the Girder Control System for HEPS-TF

4560

S.J. Li, C. H. Li, J. Liu, H. Wang, Z. Wang
IHEP, Beijing, People's Republic of China

To make the alignment become easier, the HEPS-TF (High Energy Photon Source-Test Facility) magnet girder, which is different from the conventional one, is designed to achieve the goal of adjusting the girder's position and orientation online. The control system is one of the key sub-part. This Paper will describe the control system design, especially on the hardware configuration, software programming as well as user interface design.

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THPVA054

Research of the Chinese Spallation Neutron Source Stripper Foil

4562

J.X. Chen
CSNS, Guangdong Province, People's Republic of China
L. Kang, J.B. Yu
IHEP, Beijing, People's Republic of China

Funding: This research was financially supported by the National Natural Science Foundation of China No.11375217.
In the injection process of spallation neutron source, the effect of the stripper foil is extremely critical, which is the key equipment to realize the conversion of negative hydrogen ions into proton injection. This paper mainly introduces the research of Chinese Spallation Neutron Source (CSNS) stripper foil. The CSNS stripper foil is a diamond-like carbon (DLC) foil with a thickness of 100 micrograms per square centimetre. This paper introduces the study of the thickness of the CSNS stripper foil, the installation method and the installation process in the tunnel site. Simultaneously, the influence of the gas flow rate of the vacuum chamber on the vibration of the foils is simulated. In the end of this paper, the research plan and follow-up of the experimental equipment of the stripper foil are introduced.

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THPVA057

The Primary Control Network of HLS II

4573

W. Wang, L. Lin, F.F. Wu, Q. Zhang
USTC/NSRL, Hefei, Anhui, People's Republic of China

To meet the accuracy requirement of alignment and installation of HLS', the high accuracy control network is necessary. The high accuracy primary control network will provides reliable reference to the local control network. After optimization design that using Monte-Carlo method, according to the structure characteristic of HLS', the primary control network is measured by several different instruments, such as: Laser tracker, Total station and plummet. The accuracy of actual primary control network meets the design requirements, it provides strong foundation for subsequent project.

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THPVA059

Development of a New High Power RF Window for S-band Linac

4576

W.H. Hwang, J.Y. Choi, Y.D. Joo, S.H. Kim, B.-J. Lee
PAL, Pohang, Kyungbuk, Republic of Korea
S.J. Roh
Vitzrotech Co., Ltd., Ansan City, Kyunggi-Do, Republic of Korea

A prototype rf window was developed in collaboration with Pohang Accelerator Laboratory (PAL) and domestic companies. The PAL designed the S-band TE012 rf window and conducted the high power performance tests of single rf window to verify the operation characteristics for the application to the PLSII Linac. The test was performed in the in-situ facility consisting of a modulator, klystron, waveguide network, vacuum system, cooling system, and rf analyzing equipment. As the test results with SLED, no breakdown appeared up to 75 MW peak power with 4.5 micro-seconds rf pulse width at a repetition rate of 10 Hz. The test results with the current operation level of PLSII Linac confirms that the rf window well satisfies the criteria of PLS Linac operation.

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THPVA060

Technical Overview of Inter-Undulator Support System for PAL XFEL

4579

H.-G. Lee, S.-H. Jeong, Y.G. Jung, H.-S. Kang, D.E. Kim, S.B. Lee, B.G. Oh, K.-H. Park, H.S. Suh
PAL, Pohang, Kyungbuk, Republic of Korea

Pohang Accelerator Laboratory (PAL) has been developing a SASE X-ray Free Electron Laser based on 10 GeV linear accelerator. The inter-Undulator (IU) support system was developed to be used in the intersections of the Undulator Systems. The IU supports consist of phase shifter, quadrupole magnet with mover, beam loss monitor, cavity BPM with mover, two corrector magnets and vacuum components. The adjusting mechanism of IU Support has manual alignment system to be easily adjusting the component. The mover of quadruple magnet and cavity BPM with submicron repeatability has auto-adjusting systems with stepping motor. The mover main specifications include compact dimensions and a ±1.5 mm stroke in the vertical and horizontal direction. Linear motion guide based on 5-phase stepping motors have been chosen. This paper describes the design of the stages used for precise movement and results of mechanical measurements including reproducibility will be reported.

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THPVA061

Study of the Cooling and Vacuum Systems of a Miniature 12 MeV Race-Track Microtron

4582

Yu.A. Kubyshin, X. Escaler, A. Viladomiu
UPC, Barcelona, Spain
V.I. Shvedunov
SINP MSU, Moscow, Russia

With the aim of optimization, numerical simulations of the cooling and vacuum systems of a compact 12 MeV race-track microtron (RTM) which is under construction at the Technical University of Catalonia have been carried out. The hydraulic and thermal performance of the cooling system for various flow rates has been studied using the Computational Fluid Dynamics (CFD) software. A CFD model, previously validated with experimental pressure loss results, has permitted to simulate the cooling fluid temperature, inner wall temperatures and heat trans-fer coefficients at different sections of the RTM accelerating structure. Conclusions concerning the current design and its possible optimization are discussed. Simulations of the RTM high vacuum conditions have been performed using the Monte-Carlo simulation package Molflow+. The pressure in the vacuum chamber, pumping tube conductance and maximum allowed throughput have been calculated. Also results of the vacuum chamber pumping out sessions are reported.

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THPVA065

Working Concept of 12.5 kW Tuning Dump at ESS

4591

Y. Lee, M. Eshraqi, S. Ghatnekar Nilsson, Y.I. Levinsen, R. Miyamoto, S. Molloy, M. Möller, A. Olsson, T.J. Shea, C.A. Thomas, M. Wilborgsson
ESS, Lund, Sweden
F. Sordo
ESS Bilbao, Zamudio, Spain

The linac system at the European Spallation Source (ESS) will deliver 2~GeV protons at 5~MW beam power. The accelerated protons from the linac will be transported to the rotating tungsten target by two bending magnets. A tuning beam dump will be provided at the end of the linac, downstream of the first bending magnet. This tuning dump shall be able to handle at least 12.5 kW of beam power. In this paper, we present the working concept of the tuning dump. The impact of the proton beam induced material damage on the operational loads and service lifetime of the tuning dump is analysed. A number of particle transport and finite-element simulations are performed for the tuning beam modes.

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THPVA066

TPS LINAC Temperature Monitoring System

4595

C.L. Chen, H.-P. Chang, C.-S. Fann, K.-K. Lin, K.L. Tsai
NSRRC, Hsinchu, Taiwan

TPS Linac has been providing with electron beams which conform to the specifications to the requirement since 2014. Firstly electrons are extracted from electron gun (e-gun), and they are accelerated and gained energy from 90 keV to 150 MeV in three linear accelerating sections. Then electron beams are successfully injected to the booster ring via Linac to Booster (LTB) transport line. Providing a stable and reliable operating system is next priority objective and so a temperature monitoring system is established. This temperature monitoring system is used to monitor the temperatures for each Linac sub-system and its surrounding environment. By using this temperature monitoring system, it helps to understand the relation between beam energy and working temperature for each sub-system, when Linac is under normal operation. This report will detail the temperature monitoring components, including thermalcouples, PLC thermal modules, PLC programming and graphic user interface (GUI). By integrating with EPICS, this monitoring system is becoming a complete solution for ensuring any possible influence due to thermal effects.

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THPVA067

Observation of Beam Disturbance Caused by ID Gap Variation at TLS Storage Ring

4598

H.C. Chen, C.L. Chen, H.H. Chen, C.H. Kuo, Y.K. Lin
NSRRC, Hsinchu, Taiwan

Insertion device is controlled by user for specific experimental condition on user beam time. It operates with user defined gap and phase. Three different undulators are installed in TLS (Taiwan Light Source), including one elliptically polarized undulator. Interactions between these undulators were studied to demonstrate the impact on beam performance. How to get more stable beam under undulators' interaction is discussed in this study.

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THPVA068

General Design of ID Front Ends in the TPS

4601

C.K. Kuan, C.K. Chan, Y.T. Cheng, J. -Y. Chuang, Y.M. Hsiao, I.C. Sheng, C. Shueh, H.Y. Yan
NSRRC, Hsinchu, Taiwan

The Taiwan Photon Source is a 3 GeV, 3rd generation synchrotron radiation source at the NSRRC. Phase-I commissioning includes seven Insertion Device (ID) Front Ends which are built to transmit intense synchro-tron radiation generated by In-vacuum Undulators and Elliptically Polarizing Undulators in the storage ring to the Photon Beamline. The total power and power distri-bution on Front End components is calculated and ana-lysed and Finite Element Analysis is used to verify the thermal performance under high heat loads while Monte-Carlo methods are utilized to simulate the vacuum pres-sure distribution. All apertures of the components are the same to simplify and standardize the design of the Front Ends. This paper describes main design considerations, especially the high heat load and vacuum pressure distri-bution.

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THPVA070

Cooling and Thermo Stabilization System of 100MeV/100kW Electron Linear Accelerator of Neutron Source Driver

4607

SUSPSIK115

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M. Moisieienko, I.M. Karnaukhov, A. Mytsykov, A.Y. Zelinsky
NSC/KIPT, Kharkov, Ukraine

Cooling system and temperature control technology elements of the linear electron accelerator of 100 MeV/100kW is a complex technological system composed of three subsystems: the cooling klystron gallery equipment (30 C ± 1), cooling of the accelerator tunnel equipment (30 C ± 1) and the cooling and temperature control accelerating sections and waveguide (40 ° C ± 0,2). The block diagram of cooling and temperature control of the linear electron accelerator of 100 MeV/100 kW, describes the basic principles to formulate requirements to the cooling systems. It describes the status of the installation, commissioning and testing of the cooling and temperature control of the accelerator - driver subcritical neutron source KIPT.

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THPVA073

Latest Results on Fast Kicker for g-2 E-989 Experiment at Fermilab

4616

A.A. Mikhailichenko, D. L. Rubin
Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA

We are describing the latest results on fabrication and measurements of kicker and pulser and beam dynamics in E-989 experiment at FERMILAB on precise measurement of anomalous magnetic moment of muon.

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THPVA104

Design of New Spectrum Data Acquisition System

4707

Z.X. Shao, H. Gao, W. Liu, C.Y. Pan
USTC/NSRL, Hefei, Anhui, People's Republic of China

Funding: Project supported by the National Basic Research Program of China, the National Key Scientific Instrument and Equipment Development Projects, China (2014YQ120351).
To solve the problem of spectrum acquisition in LIBS (Laser-Induced Breakdown Spectroscopy), a real-time data acquisition system was designed based on PSoC (Programmable System-On-Chip). First, the linear array CCD with electronic shutter function TCD1304DG has been used as detector .And then, the AD7621, a 16-bit analog-to-digital converter, was used to convert signal from the AFE (Analog Front End). After that, a high-integrated, low-power PSoC5LP was used as core controller, it works to complete the driver and data communication, including CCD , ADC, FIFO, the USB interface, etc. At last, a WIFI module has been added to the system for the convenience of users as well as follow-up research. The result through board-level testing indicates that the system in the spectrum acquisition is stable and accurate, and the indicators meet the LIBS project requirements.

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