MEDSI2018 - Classification: Precision mechanics / Mechatronics

Paper	Title	Page
WEOAMA01	The Status of the New High-Dynamic DCM for Sirius	147
	R.R. Geraldes, R.M. Caliari, G.B.Z.L. Moreno, L. Sanfelici, M. Saveri Silva, H.C.N. Tolentino, H. Westfahl Jr. LNLS, Campinas, Brazil T.A.M. Ruijl, R.M. Schneider MI-Partners, Eindhoven, The Netherlands
	Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC) The monochromator is known to be one of the most critical optical elements of a synchrotron beamline, since it directly affects the beam quality with respect to energy and position. Naturally, the new 4th genera-tion machines, with their small emittances, start to bring higher stability performance requirements, in spite of factors as high power loads and variations, high radiation levels, ultra-high vacuum compatibility and vibration sources. In response to that, an innova-tive concept of a high-dynamic vertical DCM (Double Crystal Monochromator) with angular range between 3 and 60 degrees (equivalent to 2.3 to 38 keV with Si(111)) has been developed at the Brazilian Synchro-tron Light Laboratory. A highly repeatable dynamic system, with servo control bandwidth of 250 Hz, has been achieved and will be installed at Sirius macromo-lecular crystallography beamline ' MANACA ' still in 2018. The complete offline results of the in-vacuum cryocooled high-dynamic DCM, showing stability between crystals around 15 nrad RMS up to 2.5 kHz, even during the Bragg angle motion for flyscans, are presented.
	Slides WEOAMA01 [7.575 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA01
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WEOAMA02	Sample Stabilization for Tomography Experiments in Presence of Large Plant Uncertainty	153
	T. Dehaeze, C.G.R.L. Collette PML, Liège, Belgium C.G.R.L. Collette ULB - FSA - SMN, Bruxelles, Belgium T. Dehaeze, M. Magnin-Mattenet ESRF, Grenoble, France
	A new low emittance lattice storage ring is under construction at the ESRF. In this new instrument, an upgraded end station for ID31 beamline must allow to position the samples along complex trajectories with a nanometer precision. In order to reach these requirements, samples have to be mounted on high precision stages, combining a capability of large stroke, spin motion, and active rejection of disturbances. First, the end station will be presented with the associated requirements. However, the precision is limited by thermal expansion and various imperfections that are not actively compensated. Our approach is to add a Nano Active Stabilization System (NASS) which is composed of a 6DoF Stewart platform and a 6 DoF metrology system. A 3D model of the end station updated with experimental data is developed. As the mass of the samples may vary by up to two orders of magnitudes, robust control strategies are required to address such plant uncertainty. The proposed control strategy are presented and applied on the developed model by conducting time domain simulations of tomography experiment in presence of instrumentation noise and system uncertainty.
	Slides WEOAMA02 [1.721 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA02
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WEOAMA03	High-Accuracy Small Roll Angle Measurement Method Based on Dual-Grating Diffraction Heterodyne Interferometer	163
	S. Tang, M. Li, H. Liang, W.F. Sheng, J. Yang IHEP, Beijing, People's Republic of China
	Funding: The work is supported by National Natural Science Foundation of China, NSFC (Grant No. 61505213). Small roll angle (ROLL) is an crucial parameter for the motion performances of ultra-precision guide way often applied in fine mechanics and instruments of synchrotron radiation, such as long trace profiler (LTP). However, it is difficult to be measured by conventional methods including interferometer and autocollimator owing to their low sensitivities in axial direction. There is an orthogonal dilemma between measured direction and angular displacement plane for ROLL measurement. Therefore, a novel method based on dual-grating diffraction heterodyne interferometer is presented, which uses the combining scheme of diffraction grating and heterodyne interferometer to overcome the orthogonal problem. Moreover, the design of differential structure with dual-grating and grating interferometer instead of pure interferometer, is adopted to improve the practicability against the environment, e. g. air fluctuation, inconstant rotation center. It has inherited advantages of high-resolution up to 2nrad, high sampling rate up to 50kHz, and contactless by mathematical modeling and analysis. So, theoretcial and experimental verifications are both implemented to its validation.
	Slides WEOAMA03 [2.304 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA03
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WEPH05	Compact Stripping Extractor for B70 Cyclotron
	T. Boiesan, M. Carlson BCSI, Vancouver, Canada
	Best Cyclotron Systems Inc (BCSI) has designed and manufactured a 70 MeV compact cyclotron for radioisotope production and research applications. The cyclotron extractor design allows negative ion stripping to extract protons between 35 and 70 MeV. The extractor is consistent with the requirement for high current operation with a minimum of intervention. Twenty-two extractor foils are available in any selection sequence on each side of the cyclotron. The foil exchange is performed in vacuum so that an exchange takes about 2 minutes while obeying safety protocols. The 22 foils are contained in a cartridge that can be quickly exchanged through a vacuum load lock minimizing operator exposure. An added benefit is that the extractor modular design reduces the operational space requirement outside of the cyclotron thus reducing the vault footprint and shielding requirement.
	Poster WEPH05 [16.826 MB]
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WEPH06	Upgrade of Magnetic Measurements Laboratory at ALBA Synchrotron	211
	J. Campmany, F. Becheri, J. Marcos, V. Massana, R. Petrocelli, L. Ribó ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	Along 2017 and 2018, a complete upgrade of ALBA magnetic measurements lab has been done. Upgrade has affected both hardware and software. Regarding hardware, a relevant innovation has been the replacement of DC motors by step motors in new Hall probe bench and in flipping and rotating coil benches. Up to now, this kind of continuous measurements usually were done using DC motors because step motors were considered unable to fulfil the required smoothness of the movement. However, current step motors state of the art made them compatible with DC. In our case, we have tested the performance of upgraded benches and they reach the same accuracy, or even better. Regarding software, we have unified all motion drivers to ICEPAP and all control system to Tango package, taking advantage of the last ICEPAP firmware. That includes the feature of triggering data acquisition system by signals generated from different axis that can be selected by software.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH06
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WEPH08	Application of Remote Installation and Measurement Smart Vehicle in Accelerator	217
	J.X. Chen, H.Y. He, C.J. Ning, A.X. Wang, Y.J. Yu, J.S. Zhang, D.H. Zhu CSNS, Guangdong Province, People's Republic of China L. Kang, L. Liu, X.J. Nie, G.Y. Wang, J.B. Yu IHEP, Beijing, People's Republic of China
	Funding: National Natural Science Foundation of China, No.11375217 The installation, alignment measurement and vibration monitoring of the accelerator equipment are cumbersome. In order to reduce the work intensity and exposure time of personnel, this paper has developed a smart vehicle that can automatically walk and automatically adjust the horizontal in the accelerator or beam line area. The smart vehicle can move forwards, sideways, oblique lines, rotations and combinations, and can automatically adjust the level according to different terrains. The auto-leveling accuracy is better than 0.001 degrees. By installing vibration measuring equipment or collimating equipment on the vehicle platform, vibration testing and collimation measurement of the equipment in the accelerator or beamline device can be performed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH08
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WEPH11	High-Efficiency and Compact Von Hamos Spectrometer for the Soft X-Ray Range
	T. Gießel, F. Fuchs Bestec GmbH, Berlin, Germany B. Langer, E. Rühl FUB, Berlin, Germany F. Schäfers HZB, Berlin, Germany
	Funding: Financial support by the BMBF (contract no.: 05K13KE2) Samples illuminated by pulsed soft X-rays with a large number of photons per pulse (XFEL, Laser-plasma sources) often restrict analytical methods to photon-in-photon-out techniques, since photon-in-electron-out techniques can suffer severely from space charge. We introduce a compact and large angle acceptance soft X-ray spectrometer for an energy range of 1-3 keV suitable for experiments under the above conditions. The spectrometer uses a von Hamos optical design covering a simultaneous energy window of >300 eV at a resolving power of 1200-2800 and a total length of the spectrometer of <600 mm. We will present design details and first performance test results.
	Poster WEPH11 [1.022 MB]
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WEPH21	A Family of Redundant Positioning Devices for Synchrotron Applications	249
	G. Olea, N. Huber HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany
	A family of reconfigurable devices able to work in synchrotron applications, especially in diffractometer environments has been developed. It can provide six (6) or less than six (<6) degrees of freedom (dof) motion capabilities (F<=6) being able to pose a heavy load sample (instruments) with high precision towards an X-ray coming beam. It is based on the Parallel Kinematics (PK) Quatropod concept with redundant actuation (Rd=2) and were built around the fully (F=6dof) basic topology 6-4(213) where 2-actuated and 1, 3-passive joints, respectively. By altering the passive joints dof, structures with less than six dof (F<6) can be obtained, e.g. 5-4[213(2)]/F=5, 4-4[213(1)]/F=4, 3-4[213(0)]/F=3 (3(2) and 3(1)and 3(0) stand for 3dof joint with constrained(less) dof - f=2, 1 or 0/blocked). For a perfect symmetric arrangement and using only P and S (P-prismatic, S-spherical) joints, several useful positioning mechanisms are presented. And, in the design phase, 2dof linear actuators(2P), e.g. XY stages have been proved to be a suitable choice, too. * J.P. Merlet, Parallel Robots Springer (2ed), 2006 G. Olea, D 202014 011 139 U1, DPMA, 2018 * HUBER GmbH, Diff. & Positioning Products, www.xhuber.com, 2018
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH21
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WEPH30	Energy Efficient Air-Conditioning System Design	270
	Z.-D. Tsai, W.S. Chan, C.S. Chen, Y.Y. Cheng, Y.-C. Chung, C.Y. Liu NSRRC, Hsinchu, Taiwan
	At the Taiwan Light Source (TLS) and Taiwan Photon Source (TPS), several studies related to energy savings in air-conditioning systems are underway, where heat recovery has been considered for laboratory applications. The performance of a run-around coil has demonstrated that heat recovery plays an important role in energy conservation. Based on this design of an air handling unit (AHU), we enhance this model by combining it with enthalpy control for seasonal changes. Here, we construct a new AHU to verify the practical impact of energy usage. The improvements show that both mechanisms can be achieved simultaneously.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH30
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WEPH32	DESIGN OF A LAYERED HIGH PRECISION MAGNET GIRDER	277
	G.Y. Wang, L. Kang, J.B. Yu, J.S. Zhang IHEP, Beijing, People's Republic of China J.X. Chen CSNS, Guangdong Province, People's Republic of China
	In order to adjust the collimation of the light source magnet, a layered magnet girder is developed, which can adjust the six degrees of freedom accurately and reduce the mutual influence of the adjustment process between the various layers of the girder. The precision of the collimation is up to 5 microns.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH32
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Paper

Title

Page

The Status of the New High-Dynamic DCM for Sirius

147

R.R. Geraldes, R.M. Caliari, G.B.Z.L. Moreno, L. Sanfelici, M. Saveri Silva, H.C.N. Tolentino, H. Westfahl Jr.
LNLS, Campinas, Brazil
T.A.M. Ruijl, R.M. Schneider
MI-Partners, Eindhoven, The Netherlands

Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC)
The monochromator is known to be one of the most critical optical elements of a synchrotron beamline, since it directly affects the beam quality with respect to energy and position. Naturally, the new 4th genera-tion machines, with their small emittances, start to bring higher stability performance requirements, in spite of factors as high power loads and variations, high radiation levels, ultra-high vacuum compatibility and vibration sources. In response to that, an innova-tive concept of a high-dynamic vertical DCM (Double Crystal Monochromator) with angular range between 3 and 60 degrees (equivalent to 2.3 to 38 keV with Si(111)) has been developed at the Brazilian Synchro-tron Light Laboratory. A highly repeatable dynamic system, with servo control bandwidth of 250 Hz, has been achieved and will be installed at Sirius macromo-lecular crystallography beamline ' MANACA ' still in 2018. The complete offline results of the in-vacuum cryocooled high-dynamic DCM, showing stability between crystals around 15 nrad RMS up to 2.5 kHz, even during the Bragg angle motion for flyscans, are presented.

Slides WEOAMA01 [7.575 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA01

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WEOAMA02

Sample Stabilization for Tomography Experiments in Presence of Large Plant Uncertainty

153

T. Dehaeze, C.G.R.L. Collette
PML, Liège, Belgium
C.G.R.L. Collette
ULB - FSA - SMN, Bruxelles, Belgium
T. Dehaeze, M. Magnin-Mattenet
ESRF, Grenoble, France

A new low emittance lattice storage ring is under construction at the ESRF. In this new instrument, an upgraded end station for ID31 beamline must allow to position the samples along complex trajectories with a nanometer precision. In order to reach these requirements, samples have to be mounted on high precision stages, combining a capability of large stroke, spin motion, and active rejection of disturbances. First, the end station will be presented with the associated requirements. However, the precision is limited by thermal expansion and various imperfections that are not actively compensated. Our approach is to add a Nano Active Stabilization System (NASS) which is composed of a 6DoF Stewart platform and a 6 DoF metrology system. A 3D model of the end station updated with experimental data is developed. As the mass of the samples may vary by up to two orders of magnitudes, robust control strategies are required to address such plant uncertainty. The proposed control strategy are presented and applied on the developed model by conducting time domain simulations of tomography experiment in presence of instrumentation noise and system uncertainty.

Slides WEOAMA02 [1.721 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA02

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WEOAMA03

High-Accuracy Small Roll Angle Measurement Method Based on Dual-Grating Diffraction Heterodyne Interferometer

163

S. Tang, M. Li, H. Liang, W.F. Sheng, J. Yang
IHEP, Beijing, People's Republic of China

Funding: The work is supported by National Natural Science Foundation of China, NSFC (Grant No. 61505213).
Small roll angle (ROLL) is an crucial parameter for the motion performances of ultra-precision guide way often applied in fine mechanics and instruments of synchrotron radiation, such as long trace profiler (LTP). However, it is difficult to be measured by conventional methods including interferometer and autocollimator owing to their low sensitivities in axial direction. There is an orthogonal dilemma between measured direction and angular displacement plane for ROLL measurement. Therefore, a novel method based on dual-grating diffraction heterodyne interferometer is presented, which uses the combining scheme of diffraction grating and heterodyne interferometer to overcome the orthogonal problem. Moreover, the design of differential structure with dual-grating and grating interferometer instead of pure interferometer, is adopted to improve the practicability against the environment, e. g. air fluctuation, inconstant rotation center. It has inherited advantages of high-resolution up to 2nrad, high sampling rate up to 50kHz, and contactless by mathematical modeling and analysis. So, theoretcial and experimental verifications are both implemented to its validation.

Slides WEOAMA03 [2.304 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOAMA03

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WEPH05

Compact Stripping Extractor for B70 Cyclotron

T. Boiesan, M. Carlson
BCSI, Vancouver, Canada

Best Cyclotron Systems Inc (BCSI) has designed and manufactured a 70 MeV compact cyclotron for radioisotope production and research applications. The cyclotron extractor design allows negative ion stripping to extract protons between 35 and 70 MeV. The extractor is consistent with the requirement for high current operation with a minimum of intervention. Twenty-two extractor foils are available in any selection sequence on each side of the cyclotron. The foil exchange is performed in vacuum so that an exchange takes about 2 minutes while obeying safety protocols. The 22 foils are contained in a cartridge that can be quickly exchanged through a vacuum load lock minimizing operator exposure. An added benefit is that the extractor modular design reduces the operational space requirement outside of the cyclotron thus reducing the vault footprint and shielding requirement.

Poster WEPH05 [16.826 MB]

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WEPH06

Upgrade of Magnetic Measurements Laboratory at ALBA Synchrotron

211

J. Campmany, F. Becheri, J. Marcos, V. Massana, R. Petrocelli, L. Ribó
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

Along 2017 and 2018, a complete upgrade of ALBA magnetic measurements lab has been done. Upgrade has affected both hardware and software. Regarding hardware, a relevant innovation has been the replacement of DC motors by step motors in new Hall probe bench and in flipping and rotating coil benches. Up to now, this kind of continuous measurements usually were done using DC motors because step motors were considered unable to fulfil the required smoothness of the movement. However, current step motors state of the art made them compatible with DC. In our case, we have tested the performance of upgraded benches and they reach the same accuracy, or even better. Regarding software, we have unified all motion drivers to ICEPAP and all control system to Tango package, taking advantage of the last ICEPAP firmware. That includes the feature of triggering data acquisition system by signals generated from different axis that can be selected by software.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH06

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WEPH08

Application of Remote Installation and Measurement Smart Vehicle in Accelerator

217

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

Funding: National Natural Science Foundation of China, No.11375217
The installation, alignment measurement and vibration monitoring of the accelerator equipment are cumbersome. In order to reduce the work intensity and exposure time of personnel, this paper has developed a smart vehicle that can automatically walk and automatically adjust the horizontal in the accelerator or beam line area. The smart vehicle can move forwards, sideways, oblique lines, rotations and combinations, and can automatically adjust the level according to different terrains. The auto-leveling accuracy is better than 0.001 degrees. By installing vibration measuring equipment or collimating equipment on the vehicle platform, vibration testing and collimation measurement of the equipment in the accelerator or beamline device can be performed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH08

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WEPH11

High-Efficiency and Compact Von Hamos Spectrometer for the Soft X-Ray Range

T. Gießel, F. Fuchs
Bestec GmbH, Berlin, Germany
B. Langer, E. Rühl
FUB, Berlin, Germany
F. Schäfers
HZB, Berlin, Germany

Funding: Financial support by the BMBF (contract no.: 05K13KE2)
Samples illuminated by pulsed soft X-rays with a large number of photons per pulse (XFEL, Laser-plasma sources) often restrict analytical methods to photon-in-photon-out techniques, since photon-in-electron-out techniques can suffer severely from space charge. We introduce a compact and large angle acceptance soft X-ray spectrometer for an energy range of 1-3 keV suitable for experiments under the above conditions. The spectrometer uses a von Hamos optical design covering a simultaneous energy window of >300 eV at a resolving power of 1200-2800 and a total length of the spectrometer of <600 mm. We will present design details and first performance test results.

Poster WEPH11 [1.022 MB]

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WEPH21

A Family of Redundant Positioning Devices for Synchrotron Applications

249

G. Olea, N. Huber
HUBER Diffraktiontechnik GmbH&Co.KG, Rimsting, Germany

A family of reconfigurable devices able to work in synchrotron applications, especially in diffractometer environments has been developed. It can provide six (6) or less than six (<6) degrees of freedom (dof) motion capabilities (F<=6) being able to pose a heavy load sample (instruments) with high precision towards an X-ray coming beam. It is based on the Parallel Kinematics (PK) Quatropod concept with redundant actuation (Rd=2) and were built around the fully (F=6dof) basic topology 6-4(213) where 2-actuated and 1, 3-passive joints, respectively. By altering the passive joints dof, structures with less than six dof (F<6) can be obtained, e.g. 5-4[213(2)]/F=5, 4-4[213(1)]/F=4, 3-4[213(0)]/F=3 (3(2) and 3(1)and 3(0) stand for 3dof joint with constrained(less) dof - f=2, 1 or 0/blocked). For a perfect symmetric arrangement and using only P and S (P-prismatic, S-spherical) joints, several useful positioning mechanisms are presented. And, in the design phase, 2dof linear actuators(2P), e.g. XY stages have been proved to be a suitable choice, too.
* J.P. Merlet, Parallel Robots Springer (2ed), 2006
** G. Olea, D 202014 011 139 U1, DPMA, 2018
*** HUBER GmbH, Diff. & Positioning Products, www.xhuber.com, 2018

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH21

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WEPH30

Energy Efficient Air-Conditioning System Design

270

Z.-D. Tsai, W.S. Chan, C.S. Chen, Y.Y. Cheng, Y.-C. Chung, C.Y. Liu
NSRRC, Hsinchu, Taiwan

At the Taiwan Light Source (TLS) and Taiwan Photon Source (TPS), several studies related to energy savings in air-conditioning systems are underway, where heat recovery has been considered for laboratory applications. The performance of a run-around coil has demonstrated that heat recovery plays an important role in energy conservation. Based on this design of an air handling unit (AHU), we enhance this model by combining it with enthalpy control for seasonal changes. Here, we construct a new AHU to verify the practical impact of energy usage. The improvements show that both mechanisms can be achieved simultaneously.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH30

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WEPH32

DESIGN OF A LAYERED HIGH PRECISION MAGNET GIRDER

277

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

In order to adjust the collimation of the light source magnet, a layered magnet girder is developed, which can adjust the six degrees of freedom accurately and reduce the mutual influence of the adjustment process between the various layers of the girder. The precision of the collimation is up to 5 microns.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH32

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