PAC2013 - List of Authors (Xu, T.)

Paper	Title	Page
THPBA13	Mechanical Design of the Cryogenic Sub-Systems for ReA6 Quarter Wave Resonator Cryomodule	1256
	M. Shuptar, F. Casagrande, A.D. Fox, M.J. Johnson, M. Leitner, S.J. Miller, T. Nellis, M.S. Patil, T. Xu, Y. Xu FRIB, East Lansing, Michigan, USA
	Funding: Work supported by US DOE Cooperative Agreement DE-SC000061 The driver linac for the Facility for Rare Isotope Beams (FRIB) consists of 49 cryomodules operated at 2 K utilizing 4 different types of superconducting resonators and 2 solenoid lengths which in turn requires 7 individual cryomodule configurations. The mechanical design requirements of the internal cryogenics of an FRIB cryomodule are determined by the piping and instrumentation diagram, which is discussed in the paper based on the FRIB quarter wave cryomodule type. In addition, heat load requirements and spatial constraints of other cryomodule sub-systems influence the cryomodule cryogenics design. The paper describes detailed design choices for the cryogenic headers and piping, a 2 K heat exchanger inside the cryomodule, solenoid current leads, and the bayonet connections to the cryogenic distribution system inside the accelerator tunnel. Different operating modes, which influence the cryogenic design, are summarized.

THPBA28	Status of Spallation Neutron Source Cryogenic Test Facility (CTF)	1292
	M.P. Howell, A. Coleman, S.-H. Kim, W.H. Strong ORNL, Oak Ridge, Tennessee, USA B. DeGraff, T.S. Neustadt, J.A. Proulx, J. Saunders, D.M. Vandygriff ORNL RAD, Oak Ridge, Tennessee, USA T. Xu FRIB, East Lansing, USA
	Funding: This work was supported by SNS through UT-Battelle, LLC, under Contract No. DEAC05-00OR22725 for the U.S. Department of Energy. The Spallation Neutron Source (SNS) is building Superconducting Radio Frequency (SRF) processing and testing facilities to support the reliability and sustainability goals of the enterprise. Some of the testing facilities require cryogenic helium at both 4K and 2K. Currently, 4K helium is supplied to the test cave from the Central Helium Liquefier (CHL) that also services the linear accelerator. As more facilities become available and testing is more frequent, it is essential to separate testing in this facility from the operation of the accelerator. This paper describes the cryogenic system under development at SNS to supply SRF testing needs. The initial phase of the project was to supply 4K helium to a Vertical Test Area (VTA) and the test cave which is capable of housing either the Horizontal Test Apparatus (HTA) or a cryomodule. It was desired to make the system as flexible as possible to meet the needs at SNS. The scope of the initial phase of this project has been expanded. First, the system will be outfitted with warm pumping capability to produce 2K helium in the testing systems. Second, a liquid fill station will be incorporated to fill portable helium Dewars.

FRYBA1	Progress towards the Facility for Rare Isotope Beams	1453
	J. Wei, N.K. Bultman, F. Casagrande, C. Compton, K.D. Davidson, J. DeKamp, B. Drewyor, K. Elliott, A. Facco, P.E. Gibson, T . Glasmacher, K. Holland, M.J. Johnson, S. Jones, D. Leitner, M. Leitner, G. Machicoane, F. Marti, D. Morris, J.A. Nolen, J.P. Ozelis, S. Peng, J. Popielarski, L. Popielarski, E. Pozdeyev, T. Russo, K. Saito, J.J. Savino, R.C. Webber, M. Williams, T. Xu, Y. Yamazaki, A. Zeller, Y. Zhang, Q. Zhao FRIB, East Lansing, USA D. Arenius, V. Ganni JLAB, Newport News, Virginia, USA A. Facco INFN/LNL, Legnaro (PD), Italy R.E. Laxdal TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada J.A. Nolen ANL, Argonne, USA
	Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 The Facility for Rare Isotope Beams (FRIB) is based on a continuous-wave superconducting heavy ion linac to accelerate all the stable isotopes to above 200 MeV/u with a beam power of up to 400 kW. At an average beam power approximately two-to-three orders-of-magnitude higher than those of operating heavy-ion facilities, FRIB stands at the power frontier of the accelerator family - the first time for heavy-ion accelerators. To realize this innovative performance, superconducting RF cavities are used starting at the very low energy of 500 keV/u, and beams with multiple charge states are accelerated simultaneously. Many technological challenges specific for this linac have been tackled by the FRIB team and collaborators. Furthermore, the distinct differences from the other types of linacs at the power front must be clearly understood to make the FRIB successful. This report summarizes the technical progress made in the past years to meet these challenges.

Paper

Title

Page

Mechanical Design of the Cryogenic Sub-Systems for ReA6 Quarter Wave Resonator Cryomodule

1256

M. Shuptar, F. Casagrande, A.D. Fox, M.J. Johnson, M. Leitner, S.J. Miller, T. Nellis, M.S. Patil, T. Xu, Y. Xu
FRIB, East Lansing, Michigan, USA

Funding: Work supported by US DOE Cooperative Agreement DE-SC000061
The driver linac for the Facility for Rare Isotope Beams (FRIB) consists of 49 cryomodules operated at 2 K utilizing 4 different types of superconducting resonators and 2 solenoid lengths which in turn requires 7 individual cryomodule configurations. The mechanical design requirements of the internal cryogenics of an FRIB cryomodule are determined by the piping and instrumentation diagram, which is discussed in the paper based on the FRIB quarter wave cryomodule type. In addition, heat load requirements and spatial constraints of other cryomodule sub-systems influence the cryomodule cryogenics design. The paper describes detailed design choices for the cryogenic headers and piping, a 2 K heat exchanger inside the cryomodule, solenoid current leads, and the bayonet connections to the cryogenic distribution system inside the accelerator tunnel. Different operating modes, which influence the cryogenic design, are summarized.

THPBA28

Status of Spallation Neutron Source Cryogenic Test Facility (CTF)

1292

M.P. Howell, A. Coleman, S.-H. Kim, W.H. Strong
ORNL, Oak Ridge, Tennessee, USA
B. DeGraff, T.S. Neustadt, J.A. Proulx, J. Saunders, D.M. Vandygriff
ORNL RAD, Oak Ridge, Tennessee, USA
T. Xu
FRIB, East Lansing, USA

Funding: This work was supported by SNS through UT-Battelle, LLC, under Contract No. DEAC05-00OR22725 for the U.S. Department of Energy.
The Spallation Neutron Source (SNS) is building Superconducting Radio Frequency (SRF) processing and testing facilities to support the reliability and sustainability goals of the enterprise. Some of the testing facilities require cryogenic helium at both 4K and 2K. Currently, 4K helium is supplied to the test cave from the Central Helium Liquefier (CHL) that also services the linear accelerator. As more facilities become available and testing is more frequent, it is essential to separate testing in this facility from the operation of the accelerator. This paper describes the cryogenic system under development at SNS to supply SRF testing needs. The initial phase of the project was to supply 4K helium to a Vertical Test Area (VTA) and the test cave which is capable of housing either the Horizontal Test Apparatus (HTA) or a cryomodule. It was desired to make the system as flexible as possible to meet the needs at SNS. The scope of the initial phase of this project has been expanded. First, the system will be outfitted with warm pumping capability to produce 2K helium in the testing systems. Second, a liquid fill station will be incorporated to fill portable helium Dewars.

FRYBA1

Progress towards the Facility for Rare Isotope Beams

1453

J. Wei, N.K. Bultman, F. Casagrande, C. Compton, K.D. Davidson, J. DeKamp, B. Drewyor, K. Elliott, A. Facco, P.E. Gibson, T . Glasmacher, K. Holland, M.J. Johnson, S. Jones, D. Leitner, M. Leitner, G. Machicoane, F. Marti, D. Morris, J.A. Nolen, J.P. Ozelis, S. Peng, J. Popielarski, L. Popielarski, E. Pozdeyev, T. Russo, K. Saito, J.J. Savino, R.C. Webber, M. Williams, T. Xu, Y. Yamazaki, A. Zeller, Y. Zhang, Q. Zhao
FRIB, East Lansing, USA
D. Arenius, V. Ganni
JLAB, Newport News, Virginia, USA
A. Facco
INFN/LNL, Legnaro (PD), Italy
R.E. Laxdal
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
J.A. Nolen
ANL, Argonne, USA

Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
The Facility for Rare Isotope Beams (FRIB) is based on a continuous-wave superconducting heavy ion linac to accelerate all the stable isotopes to above 200 MeV/u with a beam power of up to 400 kW. At an average beam power approximately two-to-three orders-of-magnitude higher than those of operating heavy-ion facilities, FRIB stands at the power frontier of the accelerator family - the first time for heavy-ion accelerators. To realize this innovative performance, superconducting RF cavities are used starting at the very low energy of 500 keV/u, and beams with multiple charge states are accelerated simultaneously. Many technological challenges specific for this linac have been tackled by the FRIB team and collaborators. Furthermore, the distinct differences from the other types of linacs at the power front must be clearly understood to make the FRIB successful. This report summarizes the technical progress made in the past years to meet these challenges.