| Paper |
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Page |
| THPL004 |
A Discrete Hysteresis Model for Piezoelectric Actuator and its Parameter Identification
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127 |
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- Y. Cao, X. B. Chen
University of Saskatchewan, Saskatoon
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Hysteresis is an important nonlinear effect exhibited by piezoelectric actuators (PEA) and its modelling has been drawing considerable attention. This paper presents the development of a novel discrete model based on the concept of auto-regressive moving average (ARMA) for the piezoelectric-actuator hysteresis, and its parameter identification method as well. Experiments were carried out to verify the effectiveness of the developed model. The result obtained shows that the developed model can well represent the hysteresis of the PEA.
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Poster
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| THPL005 |
Automation of the Macromolecular Crystallography Beamlines at the Canadian Light Source
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130 |
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- M. N. Fodje, R. Berg, G. Black, P. Grochulski, K. Janzen
CLS, Saskatoon, Saskatchewan
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The Canadian Macromolecular Crystallography Facility (CMCF) is a suite of two beamlines 08ID-1 and 08B1-1. Beamline 08B1-1 is a bending-magnet beamline for high-throughput macromolecular crystallography enabling Multiple-Wavelength Anomalous Dispersion (MAD) and Single-Wavelength Anomalous Dispersion (SAD) experiments with a high level of automation. The primary method of access to CMCF 08B1-1 will be remote, in what is commonly referred to in the field as ‘Mail-in Crystallography’. We are developing a software system for automating the beamlines, with modules for beamline control, experiment control, data analysis, information management, and graphical user interaction. The system is developed using the Python programming language and makes use of popular open-source frameworks such as Twisted, Django and GTK. Once completed, the system will allow complete and supervised automation of the macromolecular crystallography experiment from experiment setup to data analysis, thereby increasing the efficiency of the CMCF beamlines and reducing the need for user travel to the synchrotron.
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Poster
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| THPL006 |
Mechanical Vibration Measurement System at the Canadian Light Source
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133 |
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- J. Li, X. B. Chen, E. Matias, W. Zhang
CLS, Saskatoon, Saskatchewan
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In recent decades, synchrotron radiation has developed into an invaluable scientific tool around the world. At synchrotron radiation facilities, the mechanical vibrations in the optics hutch and experimental hutch, especially in the vertical direction, enlarges the beam size and changes intensity of the monochromatic X-ray beam. To investigate mechanical vibrations at the CLS, a vibration measurement system was developed. The system includes a Vector Signal Analyzer (VSA) and accelerometers. The sensitivity of the accelerometer is 1.02 v/(m/s2). The frequency range of the accelerometer is 0.1 Hz to 300 Hz. The frequency resolution of the accelerometer is better than 0.1 Hz. The vibrations at four beamlines and endstations at the CLS, i.e. the Canadian Macromolecular Crystallography Facility (CMCF) 08ID-1 beamline, the Hard X-ray MicroAnalysis (HXMA) 06ID-1 beamline, the Resonant Elastic and Inelastic Soft X-ray Scattering (REIXS) 10ID-2 beamline, and the Scanning Transmission X-ray Microscope (STXM) endstation at the Spectromicroscopy (SM) 10ID-1 beamline, are investigated.
Terzano, R., Denecke, M. A. & Medici, L. (2010). Synchrotron radiation in soil and geosciences. Journal of Synchrotron Radiation, 17, 147-148.
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Poster
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| THPL007 |
Remote Access to a Scanning Electron Microscope using Science Studio
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136 |
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- D. G. Maxwell, E. Matias
CLS, Saskatoon, Saskatchewan
- M. Bauer, M. Fuller, S. McIntryre, T. W. Simpson
UWO, London, Ontario
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Science Studio is a web portal, and framework, that provides scientists with a platform to collaborate in distributed teams on research projects, and to remotely access the resources of research facilities located across Canada. The Western Nanofabrication Facility is located at the University of Western Ontario and houses a variety of instruments for lithography, deposition and characterization. One of these instruments is an Oxford Instruments X-Ray System fitted to a Scanning Electron Microscope. This x-ray system has been integrated into Science Studio. This allows users to remotely access the system and upload data into the experiment management system. Remote control of the instrument is provided using a remote desktop, so users have access to the full capabilities of the instrument. Through Science Studio, access control and session management are also provided for this instrument.
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Poster
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| THPL008 |
CLS User Services Web Portal
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139 |
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- D. Medrano, L. M. Carter, D. G. Maxwell
CLS, Saskatoon, Saskatchewan
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The Canadian Light Source (CLS) User Services Web Portal is a collection of web applications that allows users and staff to manage experiment proposals, complete safety training and submit end-of-run surveys. Each user wanting beam time must submit a proposal describing their experiment. Once submitted, the proposal goes through a peer-review process where it is either approved or rejected. All on-site personnel are required to complete safety training. Staff and users are provided with training modules which are completed online. Most training modules consist of two parts: the presentation and the exam. The exams are graded automatically and the results are stored. At the end of each run, users are encouraged to complete an online survey. The survey gives users the opportunity to provide feedback on what was good about their CLS experience and what can be improved to provide them with better service. This paper will give an overview of the design, implementation and capabilities of web portal.
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| THPL009 |
EPICS Data Acquisition Software at the CLS
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142 |
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- G. Wright, R. Igarashi
CLS, Saskatoon, Saskatchewan
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The CLS Data Acquisition library provides a simple scan and store interface for CLS beamlines. Originally intended as a tool for testing and commissioning, it has been used in QT and GTK+ user applications at the beamlines. The current version supports dynamic loading of custom output modules to allow redefinable data transport methods and multiple simultaneous output formats.
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| THPL010 |
CLS LINAC Safety System Upgrade
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144 |
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- H. Zhang, C. Britton, G. Cubbon, C. Finlay, E. Matias, R. Tanner
CLS, Saskatoon, Saskatchewan
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The Canadian Light Source (CLS) has upgraded the safety system for its Linear Accelerator (Linac) in October 2009. IEC 61508 SIL 3 certified components and methods were adopted in the development of the new safety system. This paper describes the new safety system and outlines the lessons learned from the project in applying industrial safety rated PLC equipment in the development of safety system for CLS accelerator.
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Poster
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| THPL011 |
FEC in Deterministic Control Systems over Gigabit Ethernet
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147 |
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- C. Prados, T. Fleck
GSI, Darmstadt
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Forward Error Correction (FEC) is a technique for recovering from bit errors and packet losses in real-time network applications. Classic recovering strategies, like TCP retransmission, are not suitable due to delay, timing and bandwidth constraints. In this paper, the authors introduce the FEC techniques in a novel deterministic fieldbus, White Rabbit* (WR), developed over frame-based computer networking technology, Gigabit Ethernet. WR provides an effective and resilient way to serve as a deterministic data transfer medium and to interconnect large distributed systems, like Control Systems for Particles Accelerators. The reliability of WR falls on the FEC, which provides the means to guarantee that only one “control message” per year will be lost or irretrievable as a result of the Bit Error Rate of the physical medium (fiber optic or copper). The FEC code proposed by the authors is a VHDL hardware design, based on LDPC** and Fountain codes***, and tailored for broadcast/unicast communication in switched networks over noisy channels without retransmission.
* "The White Rabbit" Project, ICALEPCS 2009
** A mathematical theory of communication" C. E. Shannon
*** Fountain Codes, David J. C. MacKay
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Poster
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| THPL012 |
LLRF Control System Upgrade at FLASH
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150 |
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- V. Ayvazyan, Z. Geng, M. K. Grecki, O. Hensler, M. G. Hoffmann, M. Hoffmann, T. Jezynski, W. Koprek, F. Ludwig, K. Rehlich, H. Schlarb, Ch. Schmidt, S. Simrock, H. C. Weddig
DESY, Hamburg
- K. Czuba
Warsaw University of Technology, Institute of Electronic Systems, Warsaw
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The Free Electron Laser in Hamburg (FLASH) is a user facility providing high brilliant laser light for experiments. It is also a unique facility for testing the superconducting accelerator technology for the European XFEL and the International Linear Collider. As a test facility, the accelerator undergoes a constant modification and expansion. The recent upgrade started in autumn 2009. The beam energy is increased to 1.2 GeV by installing a 7th superconducting accelerating module. The new module is a prototype for the European XFEL. In order to increase the FEL radiation intensity by linearization of the beam phase space the 3rd harmonic superconducting RF cavities are installed in the injector. LLRF control system has been completely upgraded to latest generation controller boards, down-converters for higher intermediate frequency, algorithms improved like beam loading compensation, feed-forward waveform generation, etc. In order to improve the reference frequency signals the master oscillator and frequency distribution system has been upgraded as well. The paper summarizes the recently finished LLRF system upgrade and expected RF field control performance at FLASH.
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Poster
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| THPL013 |
Scripting tools for beamline commissioning and operation
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153 |
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- A. Pazos, S. Fiedler
EMBL, Hamburg
- P. Duval
DESY, Hamburg
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Scripting capabilities are a valuable help for beamline commissioning and for advanced user operation. They are the perfect complement to static Graphical User Interfaces allowing to create different applications in a rapid way. A light middle-layer for scripting support has been foreseen for the EMBL structural biology beamlines at the PETRA III synchrotron to provide 'controlled' rather than 'direct' access to the control system devices. This prevents conflicts with the control system and allows control of the supported operations. In order to account for the wish of different scripting languages by the beamline scientists an extension of the scripting capabilities of the TINE control system has been implemented. To the existing shell support, a Python extension (PyTine) has been implemented and a Perl wrapping has been also prototyped (tine4perl). An explanation of these implementations and the different wrapping possibilities is also described in this paper.
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Poster
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| THPL014 |
The ANKA B-Field Test Facility Control System, based on a SPEC Macro Package Enhanced Setup
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156 |
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- K. Cerff, W. Mexner, T. Spangenberg
Karlsruhe Institute of Technology (KIT), Karlsruhe
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The ANKA B-field test facility provides users with a flexible tool to investigate magnetic field distributions of different setups of coils or permanent magnets, optimal sensor types, geometrical arrangement and the possibility to change the independent physical stimuli to generate and alter magnetic field distributions. It is taken as an example of a straightforward device implementation with a recently introduced type of macro based ‘building block system’ for devices in spec. This macro package provides the C-like spec with an object orientated framework, with a namespace and class concept to represent the power supplies of different brands, probe positioning devices and measurement amplifiers. The device properties are stored as elements of an associative spec array, together with a set of standardized commands to access them. Their degree can be assumed to be volatile, private or public. The device properties can be initialized by default or synchronized with the values of the represented physical devices.
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Poster
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| THPL015 |
Macro package based Enhancement of SPEC controlled Experimental Setups
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159 |
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- T. Spangenberg, K. Cerff, W. Mexner
Karlsruhe Institute of Technology (KIT), Karlsruhe
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Certified Scientific Software's program package spec for X-Ray diffraction and data acquisition provides reliable instrument control to scientists at synchrotrons and other facilities worldwide. It’s very flexible C-like macro language provides a large number of degrees of freedom for experiment control as advantage and as big disadvantage at the same time. A large number of programmers with their own ideas and naming conventions are contributing to the growth of functionality. At the same time the risk of collateral damage by accidentally overriding already existing functions and variables grows constantly. To solve this dilemma a new object oriented like software development concept for spec is proposed. A few naming rules plus a macro package in combination with a single client-server-application expand the manageability and options to control experiments considerably. As main goal spec gets an object-like handling and a standardized user interface of newly introduced devices. A generic server-client based interface allows a smooth integration of spec in more complex control environments via TANGO.
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Poster
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| THPL017 |
Study case of a collaboration portal for an international scientific project
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162 |
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- M. I. Trycz, L. Catani
INFN-Roma II, Roma
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In this paper we present the results of the design, development and preliminary evaluation tests of a web-based collaboration portal aimed at supporting the teamwork of an international scientific collaboration. In the academic research environment often people use very simple collaboration tools, usually chosen out of habit. In the case of international collaborative projects, in which people don't work physically in the same place for most of the time, these important tools are far from being effective and appropriate. For instance, a collaborative scientific project is made of teams of specialists from different research institutions and countries that need to share files, drawings, pictures, software etc. and document the progress of their work. The different tasks of the project are managed by work groups (WGs) of specialists that organize their work by scheduling meetings, workshops and by setting deadlines. Quite often a single researcher contributes to more than one work group. The aim of our Portal is to offer a suite of web instruments fulfilling the above requirements without adding extra complexity to the procedures the scientists are familiar with.
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Poster
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| THPL018 |
Development of Image Processing System on Embedded EPICS for Beam Diagnostics
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165 |
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- J.-I. Odagiri, K. Furukawa, T. Obina, M. Satoh
KEK, Ibaraki
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A new image processing system was developed based on EPICS and the FA-M3 PLC made by Yokogawa Electric Corporation. The hardware of the system comprises an F3RP61 CPU module running Linux and an F3UM02 frame grabber module. The CPU functions as an IOC to analyze the raw image data acquired and transferred by the frame grabber on the PCI-bus which connects the two modules. A custom record, graphicsRecord, holds the raw image data, the results of analysis and parameters set by the user over the network. GUI panels were created by using EDM in order to display the image and to set relevant control parameters into the fields of the graphicsRecord on the F3RP61-based IOC. It was confirmed that the developed system is able to acquire image data, analyze them appropriately, and send them over the network to a host computer to display the results of analysis. The design and results on performance measurement of the system is reported.
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| THPL020 |
Control and Acquisition Software Complex for TBTS Experiments
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168 |
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- A. Dubrovskiy
CERN, Geneva
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The Two Beam Test Stand (TBTS) is a test area in the CLIC Test Facility (CTF) to demonstrate the high power RF extraction and acceleration at a high accelerating gradient, which are feasibility issues for the Compact Linear Collider (CLIC) project. In order to achieve an efficient data collection, an acquisition and logging software system was developed. All year round these systems store the main parameters such as beam position, beam current, vacuum level, pulse length etc. For predefined events they also gather and store all information about the last several pulses and the machine status. A GUI interface allows from anywhere to plot many logged characteristics at a maximum of 10 minutes delay, to go though all events and to extract any logged data. A control interface configures actions and long-term control procedures for conditioning accelerating structures. The flexible configuration of the logging, the acquisition and the control systems are integrated into the same GUI. After two years operation the critical components have shown highly fault-tolerant. Logging data are used for physic researches.
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| THPL021 |
Estimation of the Response Time and Data Flows in the TOTEM DCS
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171 |
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- F. Lucas Rodriguez
CERN, Geneva
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The TOTEM experiment at the LHC is composed by 3 different detectors, (Roman Pots silicon detectors, CSC T1 & GEM T2 telescopes). The Detector Control System (DCS) is generated in a highly automated process from external representations for connectivity and behavior. From these representations (one of them, the Finite State Machine tree) it is also possible to estimate the response of the system. It is possible to assign weights to each one of the nodes and estimate data transfers among subsystems, memory consumptions, reaction times, storage needs,… The main purpose of those estimations is not to do a full predictability analysis of the system, but just to provide a help in case of performance problems. By tuning the parameters of the estimation with the observed performance of the system, we can address issues that in principle could not be solved by purchasing a more powerful computer.
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Poster
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| THPL022 |
Plans for monitoring TPS control system infrastructure using SNMP and EPICS
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174 |
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- Y.-T. Chang, J. Chen, Y. K. Chen, Y.-S. Cheng, K. T. Hsu, K. H. Hu, C. H. Kuo, C.-J. Wang, C. Y. Wu
NSRRC, Hsinchu
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The Taiwan Photon Source (TPS) control system is one of the crucial systems for the accelerators and beamlines. It is necessary to monitor the status of the control system components such as housekeeping parameters of cPCI EPICS IOC crates, network traffic, connections between computers, etc. The equipment room environment including electric power, temperature, fire alarm, and water leak will also need to be watched. Using Simple Network Management Protocol (SNMP), the behaviour of network-attached devices can be monitored for administrative attention. Since the TPS control system is based upon the EPICS framework, the monitoring system is planned to adopt the EPICS support with SNMP. This paper will describe the system architecture of this monitoring system.
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Poster
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| THPL023 |
Data Acquisition and Studies of Vibration Motion in TLS Beamlines
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177 |
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- P. C. Chiu, J. Chen, Y. K. Chen, K. T. Hsu, K. H. Hu, C. H. Kuo
NSRRC, Hsinchu
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TPS (Taiwan Photon Source) is being under construction while TLS (Taiwan Light Source) is still on operation at the same NSRRC site. It was observed that the stability of photon beam intensity (Io) of TLS seemed a little deteriorated at daytime, when civil work is busy, compared to the nighttime. The intensity changes at different beamlines, however, aren’t consistent with each other in each time, furthermore not so agreeing with the electron beam. Therefore, to correlate how the ground vibration due to civil construction effected on beam behaviour, the vibration measurement system is integrated into the existing TLS control system. The system will support waveform acquisition which could be acquired on demand. Meanwhile, realtime 10 Hz rms detector which could be archived continuously is also considered to be built in the future.
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Poster
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| THPL024 |
Computational Strategies in Optimizing a Real-Time Grad-Shafranov PDE Solver using High-Level Graphical Programming and COTS Technology
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180 |
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- L. Giannone, R. Fischer, K. Lackner
MPI/IPP, Garching
- M. D. Cerna, J. Nagle, M. M. Ravindran, Q. Ruan, D. Schmidt, A. Veeramani, A. Vrancic, L. Wenzel
National Instruments, Austin
- P. J. McCarthy
National University of Ireland, University College Cork
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Big physics control experiments require enormous computational power to solve large problems with demanding real-time constraints. Sensors are acquired in real-time to feed mathematical routines, which then generate control outputs to real-world processes. The underlying mathematics can be sophisticated, as even non-linear PDEs have to be solved thousands of times per second. Is low-level coding of highly specialized hardware required to meet the challenge? We report on an alternative approach based on LabVIEW that addresses demanding plasma shape control in tokamaks. A variety of input signals (magnetic coils, X-ray sensors) are combined and a constrained non-linear Grad-Shafranov PDE is solved to calculate the magnetic equilibrium in under 0.5 ms with low jitter. The off-the-shelf n-core hardware and graphical software architecture is described with a strong emphasis on the seamless interplay between development system and real-time target deployment. Numerous mathematical challenges were addressed and several generally-applicable numerical and mathematical strategies proved critical to the timing goals. Several benchmarks illustrate what can be achieved with this approach.
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Poster
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| THPL026 |
ESS Controls Strategy and Control Box Concept
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183 |
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- I. Verstovsek, K. Zagar
Cosylab, Ljubljana
- S. Peggs, C. G. Trahern
ESS-S, Lund
- T. Satogata
BNL, Upton, Long Island, New York
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European Spallation Source (ESS) will be constructed by a number of partner institutions in an international collaboration, thus increasing organizational risk as control system integration will be performed by a large number of independent teams. From the earliest stages in the project a lot of effort will be put into standardization of hardware, software and development procedures. ESS will use EPICS control system and will build on the positive experience of SNS and ITER. The basic unit of standardization is called the Control Box, and consists of one or more input/output controller (IOC) computers, zero or more I/O modules, PLC subsystems and intelligent special-purpose controllers, with all the software and a fully integrated development environment support. In this article we present the challenges faced by the Control Box concept and the benefits it brings.
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