MEDSI2018 - List of Keywords (cryogenics)

Paper	Title	Other Keywords	Page
TUPH03	U15 Design and Construction Progress	undulator, vacuum, permanent-magnet, operation	26
	F. Briquez, C.A. Arrachart, N.B. Baron, P. Berteaud, F. Blache, C.B. Bourgoin, N. Béchu, M.-E. Couprie, J. Da Silva Castro, J.M. Dubuisson, J.P. Duval, C. Herbeaux, F. Lepage, A. Lestrade, F. Marteau, A. Mary, F.M. Michel, S.M. Morand, M.-H. Nguyen, A.R. Rouquié, M. Sebdaoui, G. Sharma, K.T. Tavakoli, M. Tilmont, M. Valléau, M.V. Vandenberghe, J. Vétéran, C. de Oliveira SOLEIL, Gif-sur-Yvette, France
	A 15 mm period PrFeB Cryogenic Permanent Magnet Undulator (CPMU) is under construction at SOLEIL in the frame of a collaboration with MAXIV, relying on the experience gained from the two PrFeB CPMU already installed at SOLEIL. The improved design includes a magnetic length of 3 m and a minimum gap of 3 mm, leading to a polyvalent device of interest for both synchrotron radiation sources and free electron lasers. A dedicated magnetic measurement bench is also under development to perform measurements at cryogenic temperature, based on the SAFALI system. The designs of both undulator and measurement bench will be explained, the construction progress will be detailed and first results will be given.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH03
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TUPH22	Study on Cooling Technology of the Superconducting Undulator at SSRF	SRF, operation, radiation, undulator	75
	Y. Liu, S. Sun, J. Wang, L. Wang, S.H. Wang SINAP, Shanghai, People's Republic of China
	A superconducting undulator (SCU) prototpye with the period of 16 mm and the magnetic gap of 9.5 mm has been designed and fabricated at the Shanghai Institute of Applied Physics(SINAP) since late 2013. A set of cooling system is designed to cool down cold masses. This paper presents the details of their design, calculation and test: 4 small cryogenic refrigerators are used as cold sources, and the superconducting coil and beam pipe are independently cooled down; The 4.2 K superconducting coil is mainly cooled by the liquid helium tube of the thermosyphon loop with evaporation and recondensation; The 10~20 K ultra-high vacuum beam tube is cooled by heat conduction. The main sources and mechanism of thermal loads for SCU were analyzed. And experimental test of cooling technology for SCU prototype had been performed, the feasibility of cooling scheme and the rationality of the cooling structure for the SINAP SCU prototype were verified. The cryogenic test and operation of the SCU doesn't require the input of liquid helium from the outside, and is not limited by the liquid helium source. This is the characteristic of SINAP's SCU cooling technology.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH22
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WEOPMA07	Development of a New Sub-4k ARPES Endstation at PSI	radiation, ISOL, interface, synchrotron	193
	D. Trutmann, S. Hasanaj, St. Maag, L. Nue, A. Pfister, P.N. Plumb, A. Schwarb, S. Shi, K.M. Zehnder PSI, Villigen PSI, Switzerland
	Funding: Swiss National Science Foundation (SNSF) project number 206021₁64016 In spring 2016 a project was started to renew the high-resolution ARPES endstation of the Surface/Interface Spectroscopy (SIS) beamline at PSI. The focus lay on achieving sample temperatures below 4 K while maintaining 6 degrees of freedom. This made it necessary to redesign all thermally active parts, such as the connection to the cryostat, the flexible braid that enables the tilt and azimuthal movement, the sample clamping as well as the thermal isolators that hold the clamping device in place. A newly introduced shield in the main analyser chamber, cooled by separate cryopumps, is used to remove nearly all radiation heat load. A major milestone has recently been taken, by running cryogenic tests on a test stand. The simplified setup reached sample temperatures of 3.35 K. The temperature loss from the cryostat to the sample was as low as 0.6 K. Encouraged by these results, it is believed that the final endstation will be able to reach temperatures even below 3 K. With the new cryo concept, the thermal performance seems to be mainly limited by the radiative heat load emitted by the analyser lens. The new endstation is planned to be in operation by spring 2019.
	Slides WEOPMA07 [3.122 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOPMA07
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WEPH31	Optimization Method Using Thermal and Mechanical Simulations for Sirius High-Stability Mirrors	simulation, synchrotron, radiation, photon	273
	L.M. Volpe, G.V. Claudiano, R.R. Geraldes, S.A.L. Luiz, A.C. Pinto LNLS, Campinas, Brazil
	Funding: Brazil's Ministry of Science, Technology, Innovation and Communication (MCTIC) The mirrors for Sirius, the new 4th-generation synchrotron at the Brazilian Synchrotron Light Laboratory (LNLS), have strict requirements regarding thermo-mechanical stability and deformations, with figure height and slope errors limited to a few nanometers and tens of nanoradians, respectively. Therefore, fixed-shape mirrors have been defined with horizontally-reflecting orientation (except for vertically-reflecting mirrors of KB systems), whereas their cooling schemes (namely, air, water or liquid nitrogen cooling) depend on the particular power load. A thermal and mechanical optimization method was developed to guide the design of mirrors through the evaluation of deformations caused by power load, cooling, gravity, tightening of the fastening screws, manufacturing errors and modal analyses. Up to now, this method was already used to define the mirrors of Sirius' beamlines, which include plane, cylindrical, elliptical and ellipsoidal mirrors, as well as KB systems for microprobe and nanoprobe stations. Two examples are presented to illustrate the method.
	Poster WEPH31 [1.296 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH31
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THPH33	Direct LN2 Cooled Double Crystal Monochromator	vacuum, wiggler, radiation, damping	406
	T. Mochizuki, K. Akiyama, K. Endo, H. Hara, T. Ohsawa, J. Sonoyama, T. Tachibana, H. Takenaga, K. Tsubota TOYAMA Co., Ltd., Kanazawa, Japan K. Attenkofer, E. Stavitski BNL, Upton, Long Island, New York, USA
	A liquid-nitrogen-cooled (LN) X-ray double crystal monochromator has been designed and built for the high power load damping wiggler beamline of the NSLS2. It was designed as the direct LN first crystal to dissipate the max heat load of 2 kW and the second is in-direct-braid LN. It is designed to operate for beam energy 5 to 36 keV with fixed exit beam mode, and for QEXAFS compatible with channel cut mode. It is designed to rotate the Bragg axis with using AC servo motor and achieve up to 10 Hz scan.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH33
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THPH43	New Holder for Dual-Axis Cryo Soft X-Ray Tomography of Cells at the Mistral Beamline	synchrotron, vacuum, shielding, radiation	427
	R. Valcárcel, C. Colldelram, N. Gonzalez, E. Pereiro, A.J. Pérez-Berná, A. Sorrentino ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	A new dual-axis sample holder has been designed and built for the Transmission soft X-ray Microscope (TXM) at the MISTRAL beamline (ALBA Synchrotron) to perform cryo-soft X-ray tomography of cells with dual tilt configuration to reduce the missing wedge. The design, with restricted dimensions Ø7x30mm, enables using commercial Auto-Grid support rings that give rigidity to the sample grid handling. It consists of a guided miniature handle with a spring system that allows sample rotation by 90° around the beam axis inside vacuum and in cryogenic conditions by using the TXM sample loading robot keeping a rotation of ±65° at the sample stage. Two magnets fix the positions at 0° and 90°.The two tilt series can be collected consecutively and the use of Au fiducials permits combining both improving the final quality of the 3D reconstructions. In particular, cellular features hidden due to their orientation with respect to the axis of rotation become visible. The main frame is made in aluminium bronze to enhance the thermal conductivity and in addition, all the pieces have undergone an ion implantation treatment in order to reduce friction and improve the anti-seizure property of the parts.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH43
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Paper

Title

Other Keywords

Page

TUPH03

U15 Design and Construction Progress

undulator, vacuum, permanent-magnet, operation

26

F. Briquez, C.A. Arrachart, N.B. Baron, P. Berteaud, F. Blache, C.B. Bourgoin, N. Béchu, M.-E. Couprie, J. Da Silva Castro, J.M. Dubuisson, J.P. Duval, C. Herbeaux, F. Lepage, A. Lestrade, F. Marteau, A. Mary, F.M. Michel, S.M. Morand, M.-H. Nguyen, A.R. Rouquié, M. Sebdaoui, G. Sharma, K.T. Tavakoli, M. Tilmont, M. Valléau, M.V. Vandenberghe, J. Vétéran, C. de Oliveira
SOLEIL, Gif-sur-Yvette, France

A 15 mm period PrFeB Cryogenic Permanent Magnet Undulator (CPMU) is under construction at SOLEIL in the frame of a collaboration with MAXIV, relying on the experience gained from the two PrFeB CPMU already installed at SOLEIL. The improved design includes a magnetic length of 3 m and a minimum gap of 3 mm, leading to a polyvalent device of interest for both synchrotron radiation sources and free electron lasers. A dedicated magnetic measurement bench is also under development to perform measurements at cryogenic temperature, based on the SAFALI system. The designs of both undulator and measurement bench will be explained, the construction progress will be detailed and first results will be given.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH03

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPH22

Study on Cooling Technology of the Superconducting Undulator at SSRF

SRF, operation, radiation, undulator

75

Y. Liu, S. Sun, J. Wang, L. Wang, S.H. Wang
SINAP, Shanghai, People's Republic of China

A superconducting undulator (SCU) prototpye with the period of 16 mm and the magnetic gap of 9.5 mm has been designed and fabricated at the Shanghai Institute of Applied Physics(SINAP) since late 2013. A set of cooling system is designed to cool down cold masses. This paper presents the details of their design, calculation and test: 4 small cryogenic refrigerators are used as cold sources, and the superconducting coil and beam pipe are independently cooled down; The 4.2 K superconducting coil is mainly cooled by the liquid helium tube of the thermosyphon loop with evaporation and recondensation; The 10~20 K ultra-high vacuum beam tube is cooled by heat conduction. The main sources and mechanism of thermal loads for SCU were analyzed. And experimental test of cooling technology for SCU prototype had been performed, the feasibility of cooling scheme and the rationality of the cooling structure for the SINAP SCU prototype were verified. The cryogenic test and operation of the SCU doesn't require the input of liquid helium from the outside, and is not limited by the liquid helium source. This is the characteristic of SINAP's SCU cooling technology.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH22

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEOPMA07

Development of a New Sub-4k ARPES Endstation at PSI

radiation, ISOL, interface, synchrotron

193

D. Trutmann, S. Hasanaj, St. Maag, L. Nue, A. Pfister, P.N. Plumb, A. Schwarb, S. Shi, K.M. Zehnder
PSI, Villigen PSI, Switzerland

Funding: Swiss National Science Foundation (SNSF) project number 206021₁64016
In spring 2016 a project was started to renew the high-resolution ARPES endstation of the Surface/Interface Spectroscopy (SIS) beamline at PSI. The focus lay on achieving sample temperatures below 4 K while maintaining 6 degrees of freedom. This made it necessary to redesign all thermally active parts, such as the connection to the cryostat, the flexible braid that enables the tilt and azimuthal movement, the sample clamping as well as the thermal isolators that hold the clamping device in place. A newly introduced shield in the main analyser chamber, cooled by separate cryopumps, is used to remove nearly all radiation heat load. A major milestone has recently been taken, by running cryogenic tests on a test stand. The simplified setup reached sample temperatures of 3.35 K. The temperature loss from the cryostat to the sample was as low as 0.6 K. Encouraged by these results, it is believed that the final endstation will be able to reach temperatures even below 3 K. With the new cryo concept, the thermal performance seems to be mainly limited by the radiative heat load emitted by the analyser lens. The new endstation is planned to be in operation by spring 2019.

Slides WEOPMA07 [3.122 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOPMA07

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPH31

Optimization Method Using Thermal and Mechanical Simulations for Sirius High-Stability Mirrors

simulation, synchrotron, radiation, photon

273

L.M. Volpe, G.V. Claudiano, R.R. Geraldes, S.A.L. Luiz, A.C. Pinto
LNLS, Campinas, Brazil

Funding: Brazil's Ministry of Science, Technology, Innovation and Communication (MCTIC)
The mirrors for Sirius, the new 4th-generation synchrotron at the Brazilian Synchrotron Light Laboratory (LNLS), have strict requirements regarding thermo-mechanical stability and deformations, with figure height and slope errors limited to a few nanometers and tens of nanoradians, respectively. Therefore, fixed-shape mirrors have been defined with horizontally-reflecting orientation (except for vertically-reflecting mirrors of KB systems), whereas their cooling schemes (namely, air, water or liquid nitrogen cooling) depend on the particular power load. A thermal and mechanical optimization method was developed to guide the design of mirrors through the evaluation of deformations caused by power load, cooling, gravity, tightening of the fastening screws, manufacturing errors and modal analyses. Up to now, this method was already used to define the mirrors of Sirius' beamlines, which include plane, cylindrical, elliptical and ellipsoidal mirrors, as well as KB systems for microprobe and nanoprobe stations. Two examples are presented to illustrate the method.

Poster WEPH31 [1.296 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH31

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPH33

Direct LN2 Cooled Double Crystal Monochromator

vacuum, wiggler, radiation, damping

406

T. Mochizuki, K. Akiyama, K. Endo, H. Hara, T. Ohsawa, J. Sonoyama, T. Tachibana, H. Takenaga, K. Tsubota
TOYAMA Co., Ltd., Kanazawa, Japan
K. Attenkofer, E. Stavitski
BNL, Upton, Long Island, New York, USA

A liquid-nitrogen-cooled (LN) X-ray double crystal monochromator has been designed and built for the high power load damping wiggler beamline of the NSLS2. It was designed as the direct LN first crystal to dissipate the max heat load of 2 kW and the second is in-direct-braid LN. It is designed to operate for beam energy 5 to 36 keV with fixed exit beam mode, and for QEXAFS compatible with channel cut mode. It is designed to rotate the Bragg axis with using AC servo motor and achieve up to 10 Hz scan.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH33

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPH43

New Holder for Dual-Axis Cryo Soft X-Ray Tomography of Cells at the Mistral Beamline

synchrotron, vacuum, shielding, radiation

427

R. Valcárcel, C. Colldelram, N. Gonzalez, E. Pereiro, A.J. Pérez-Berná, A. Sorrentino
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

A new dual-axis sample holder has been designed and built for the Transmission soft X-ray Microscope (TXM) at the MISTRAL beamline (ALBA Synchrotron) to perform cryo-soft X-ray tomography of cells with dual tilt configuration to reduce the missing wedge. The design, with restricted dimensions Ø7x30mm, enables using commercial Auto-Grid support rings that give rigidity to the sample grid handling. It consists of a guided miniature handle with a spring system that allows sample rotation by 90° around the beam axis inside vacuum and in cryogenic conditions by using the TXM sample loading robot keeping a rotation of ±65° at the sample stage. Two magnets fix the positions at 0° and 90°.The two tilt series can be collected consecutively and the use of Au fiducials permits combining both improving the final quality of the 3D reconstructions. In particular, cellular features hidden due to their orientation with respect to the axis of rotation become visible. The main frame is made in aluminium bronze to enhance the thermal conductivity and in addition, all the pieces have undergone an ion implantation treatment in order to reduce friction and improve the anti-seizure property of the parts.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH43

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)