IBIC2014 - List of Keywords (cryogenics)

Paper	Title	Other Keywords	Page
TUPF11	Mechanical Design of Cryogenic Vacuum Feedthroughs for X-FEL Button BPMs	simulation, vacuum, project-management, operation	332
	S. Vilcins, D. Lipka DESY, Hamburg, Germany
	The European XFEL is a 4th generation synchrotron radiation source, currently under construction in Hamburg. Based on different Free-Electron Laser and spontaneous sources and driven by a superconducting accelerator, it will be able to provide several user stations with photons simultaneously. Due to the superconducting technology in the accelerators modules many components have to operate at liquid helium temperature. This poster will concentrate on high frequency ultra high vacuum feedthrough used for the beam position monitors of the cryogenic accelerator modules. Main emphasis will be put on the design of these feedthroughs, their material composition and the production process. The capability to be used under these very special conditions was investigated with FEM simulations, as well as with a test procedure. The results of these simulations will be presented; the tests and their results will be explained in detail.
	Poster TUPF11 [0.407 MB]
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TUPF16	FRIB Beam Position Monitor Pick-Up Design	linac, pick-up, ion, cavity	355
	O. Yair, J.L. Crisp, G. Kiupel, S.M. Lidia, R.C. Webber FRIB, East Lansing, Michigan, USA
	Due to the different beam diameters and the inclusion of superconducting cavities, different Beam Position Monitor (BPM) types with welded buttons are to be used in the Facility for Rare Isotope Beams (FRIB). The varying BPM sizes include the following apertures: 40 mm, 50 mm, 100 mm, and 150 mm. The 40 mm BPMs include both warm and cold types where the cold BPMs are located in cryomodules next to SRF cavities. Steel-jacketed SiO2 coaxial cables with sealed SMA connectors have been selected as signal cables in the cryomodule insulating vacuum. These will connect to the BPM assembly at roughly 4 K temperature at one end and to the feedthrough flange in the vacuum vessel wall at 300 K at the other end. The 40 mm and 50 mm BPMs will include 20 mm custom-made buttons. The 100 mm and 150 mm aperture BPM buttons will be larger, anywhere from 30 mm to 40 mm. This paper will specify the mechanical and electrical design challenges and the resolutions associated with FRIB operations in the following areas: varying BPM conditions, changes in apertures, and variants in button sizes.
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TUPD25	Cryogenic Beam Loss Monitors for the Superconducting Magnets of the LHC	detector, radiation, dipole, proton	471
	M.R. Bartosik, B. Dehning, M. Sapinski CERN, Geneva, Switzerland V. Eremin, E. Verbitskaya IOFFE, St. Petersburg, Russia E. Griesmayer CIVIDEC Instrumentation, Wien, Austria C. Kurfuerst EBG MedAustron, Wr. Neustadt, Austria
	Funding: This research project has been supported by a Marie Curie Early Initial Training Network Fellowship of the European Community’s Seventh Framework Programme (contract number: PITN-GA-2011-289485-OPAC). The Beam Loss Monitoring (BLM) detectors close to the interaction points (IP) of the Large Hadron Collider (LHC) are currently located outside the cryostat, far from the superconducting coils of the magnets. In addition to their sensitivity to lost beam particles, they also detect particles coming from the experimental collisions, which do not contribute significantly to the heat deposition in the superconducting coils. In the future, with beams of higher energy and brightness resulting in higher luminosity, distinguishing between these interaction products and dangerous quench-provoking beam losses from the primary proton beams will be challenging. The system can be optimised by locating beam loss monitors as close as possible to the superconducting coils, inside the cold mass of the magnets in superfluid helium at 1.9 K. The dose then measured by such Cryogenic Beam Loss Monitors (CryoBLMs) would more precisely correspond to the real dose deposited in the coil. The candidates under investigation for such detectors are based on silicon and diamond, several of which have now been installed inside the magnets in the LHC tunnel. This contribution will present the mechanical and electrical designs of these systems, as well as the results of their qualification testing.
	Poster TUPD25 [7.897 MB]
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WECZB1	A SQUID-Based Beam Current Monitor for FAIR/CRYRING	pick-up, electronics, niobium, ion	510
	R. Geithner, T. Stöhlker IOQ, Jena, Germany R. Geithner, T. Stöhlker HIJ, Jena, Germany F. Kurian, H. Reeg, M. Schwickert, T. Stöhlker GSI, Darmstadt, Germany R. Neubert, P. Seidel FSU Jena, Jena, Germany
	A SQUID-based beam current monitor was developed for the upcoming FAIR-Project, providing a non-destructive online monitoring of the beam currents in the nA-range. The Cryogenic Current Comparator (CCC) was optimized for a lowest possible noise-limited current resolution together with a high system bandwidth. This CCC should be installed in the CRYRING facility, working as a test bench for FAIR. In this contribution we present results of the completed CCC for FAIR/CRYRING and also arrangements that have been done for the installation of the CCC at CRYRING, regarding the cryostat design.
	Slides WECZB1 [6.109 MB]
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WEPF04	A Cryogenic Current Comparator for the Low Energy Antiproton Facitities at CERN	pick-up, coupling, feedback, antiproton	530
	M.F. Fernandes, J. Tan CERN, Geneva, Switzerland C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom C.P. Welsch The University of Liverpool, Liverpool, United Kingdom
	Funding: Funded by the European Unions Seventh Framework Programme for research, technological development and demonstration under grant agreement no 289485. Several laboratories have shown the potential of using Superconducting QUantum Interference Device (SQUID) magnetometers together with superconductor magnetic shields to measure beam current intensities in the sub-micro-Ampere regime. CERN, in collaboration with GSI, Jena university and Helmholtz Institute Jena, is currently working on developing an improved version of such a current monitor for the Antiproton Decelerator (AD) and Extra Low ENergy Antiproton (ELENA) rings at CERN, aiming for better current resolution and overall system availability. This contribution will present the current design, including theoretical estimation of the current resolution; stability limits of SQUID systems and adaptation of the coupling circuit to the AD beam parameters; the analysis of thermal and mechanical cryostat modes.
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Paper

Title

Other Keywords

Page

TUPF11

Mechanical Design of Cryogenic Vacuum Feedthroughs for X-FEL Button BPMs

simulation, vacuum, project-management, operation

332

S. Vilcins, D. Lipka
DESY, Hamburg, Germany

The European XFEL is a 4th generation synchrotron radiation source, currently under construction in Hamburg. Based on different Free-Electron Laser and spontaneous sources and driven by a superconducting accelerator, it will be able to provide several user stations with photons simultaneously. Due to the superconducting technology in the accelerators modules many components have to operate at liquid helium temperature. This poster will concentrate on high frequency ultra high vacuum feedthrough used for the beam position monitors of the cryogenic accelerator modules. Main emphasis will be put on the design of these feedthroughs, their material composition and the production process. The capability to be used under these very special conditions was investigated with FEM simulations, as well as with a test procedure. The results of these simulations will be presented; the tests and their results will be explained in detail.

Poster TUPF11 [0.407 MB]

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reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

TUPF16

FRIB Beam Position Monitor Pick-Up Design

linac, pick-up, ion, cavity

355

O. Yair, J.L. Crisp, G. Kiupel, S.M. Lidia, R.C. Webber
FRIB, East Lansing, Michigan, USA

Due to the different beam diameters and the inclusion of superconducting cavities, different Beam Position Monitor (BPM) types with welded buttons are to be used in the Facility for Rare Isotope Beams (FRIB). The varying BPM sizes include the following apertures: 40 mm, 50 mm, 100 mm, and 150 mm. The 40 mm BPMs include both warm and cold types where the cold BPMs are located in cryomodules next to SRF cavities. Steel-jacketed SiO2 coaxial cables with sealed SMA connectors have been selected as signal cables in the cryomodule insulating vacuum. These will connect to the BPM assembly at roughly 4 K temperature at one end and to the feedthrough flange in the vacuum vessel wall at 300 K at the other end. The 40 mm and 50 mm BPMs will include 20 mm custom-made buttons. The 100 mm and 150 mm aperture BPM buttons will be larger, anywhere from 30 mm to 40 mm. This paper will specify the mechanical and electrical design challenges and the resolutions associated with FRIB operations in the following areas: varying BPM conditions, changes in apertures, and variants in button sizes.

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

TUPD25

Cryogenic Beam Loss Monitors for the Superconducting Magnets of the LHC

detector, radiation, dipole, proton

471

M.R. Bartosik, B. Dehning, M. Sapinski
CERN, Geneva, Switzerland
V. Eremin, E. Verbitskaya
IOFFE, St. Petersburg, Russia
E. Griesmayer
CIVIDEC Instrumentation, Wien, Austria
C. Kurfuerst
EBG MedAustron, Wr. Neustadt, Austria

Funding: This research project has been supported by a Marie Curie Early Initial Training Network Fellowship of the European Community’s Seventh Framework Programme (contract number: PITN-GA-2011-289485-OPAC).
The Beam Loss Monitoring (BLM) detectors close to the interaction points (IP) of the Large Hadron Collider (LHC) are currently located outside the cryostat, far from the superconducting coils of the magnets. In addition to their sensitivity to lost beam particles, they also detect particles coming from the experimental collisions, which do not contribute significantly to the heat deposition in the superconducting coils. In the future, with beams of higher energy and brightness resulting in higher luminosity, distinguishing between these interaction products and dangerous quench-provoking beam losses from the primary proton beams will be challenging. The system can be optimised by locating beam loss monitors as close as possible to the superconducting coils, inside the cold mass of the magnets in superfluid helium at 1.9 K. The dose then measured by such Cryogenic Beam Loss Monitors (CryoBLMs) would more precisely correspond to the real dose deposited in the coil. The candidates under investigation for such detectors are based on silicon and diamond, several of which have now been installed inside the magnets in the LHC tunnel. This contribution will present the mechanical and electrical designs of these systems, as well as the results of their qualification testing.

Poster TUPD25 [7.897 MB]

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WECZB1

A SQUID-Based Beam Current Monitor for FAIR/CRYRING

pick-up, electronics, niobium, ion

510

R. Geithner, T. Stöhlker
IOQ, Jena, Germany
R. Geithner, T. Stöhlker
HIJ, Jena, Germany
F. Kurian, H. Reeg, M. Schwickert, T. Stöhlker
GSI, Darmstadt, Germany
R. Neubert, P. Seidel
FSU Jena, Jena, Germany

A SQUID-based beam current monitor was developed for the upcoming FAIR-Project, providing a non-destructive online monitoring of the beam currents in the nA-range. The Cryogenic Current Comparator (CCC) was optimized for a lowest possible noise-limited current resolution together with a high system bandwidth. This CCC should be installed in the CRYRING facility, working as a test bench for FAIR. In this contribution we present results of the completed CCC for FAIR/CRYRING and also arrangements that have been done for the installation of the CCC at CRYRING, regarding the cryostat design.

Slides WECZB1 [6.109 MB]

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WEPF04

A Cryogenic Current Comparator for the Low Energy Antiproton Facitities at CERN

pick-up, coupling, feedback, antiproton

530

M.F. Fernandes, J. Tan
CERN, Geneva, Switzerland
C.P. Welsch
Cockcroft Institute, Warrington, Cheshire, United Kingdom
C.P. Welsch
The University of Liverpool, Liverpool, United Kingdom

Funding: Funded by the European Unions Seventh Framework Programme for research, technological development and demonstration under grant agreement no 289485.
Several laboratories have shown the potential of using Superconducting QUantum Interference Device (SQUID) magnetometers together with superconductor magnetic shields to measure beam current intensities in the sub-micro-Ampere regime. CERN, in collaboration with GSI, Jena university and Helmholtz Institute Jena, is currently working on developing an improved version of such a current monitor for the Antiproton Decelerator (AD) and Extra Low ENergy Antiproton (ELENA) rings at CERN, aiming for better current resolution and overall system availability. This contribution will present the current design, including theoretical estimation of the current resolution; stability limits of SQUID systems and adaptation of the coupling circuit to the AD beam parameters; the analysis of thermal and mechanical cryostat modes.

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)