Design and operation of the cryostat for the CESR-c superconducting wiggler magnets

Author

He, Y. ; Codner, G. ; Ehrlich, R.D. ; Li, Y. ; Medjidzade, V. ; Mikhailichenko, A. ; Mistry, N.B. ; Nordberg, E. ; Rice, D. ; Sabol, D. ; Smolenski, K. ; Widger, D. ; Smith, E.N.

Author_Institution

Lab. for Elementary-Particle Phys., Cornell Univ., Ithaca, NY, USA

Volume

4

fYear

2003

fDate

12-16 May 2003

Firstpage

2399

Abstract

As part of the "CESR-c" upgrade project, a full-scale prototype superferric wiggler module has been installed into the Cornell Electron Storage Ring (CESR) and successfully operated since October 2002. At least eleven more wigglers are to be installed to enable full operation of the CESR-c. The wiggler magnets are chosen to achieve the necessary damping for optimum operation of CESR-c at a beam energy of 1.88 GeV. The wiggler cryostat units are designed to be modular, of fixed length flange-to-flange, so that they can be easily installed and exchanged. The cryostat incorporates several novel features including a suspension system with very low heat leak that prevents any significant motion during cool down, a custom triple cryogenic feedthrough, and a helium vessel made in two halves, each enclosing a half-magnet. This article presents the design, fabrication, and operation of the CESR-c wiggler cryostat.

Keywords

accelerator magnets; beam handling techniques; cryostats; damping; electron accelerators; helium; storage rings; superconducting magnets; wigglers; CESR-c optimum operation; CESR-c superconducting wiggler magnets; CESR-c upgrade project; Cornell Electron Storage Ring; He; cool down process; cryostat design; custom triple cryogenic feedthrough; damping; fabrication; fixed length flange-to-flange modular design; full-scale prototype superferric wiggler module; half-magnet; helium vessel; low heat leak; operation; suspension system; Cryogenics; Damping; Electrons; Fabrication; Helium; Magnetic levitation; Prototypes; Storage rings; Superconducting magnets; Undulators;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289133

Filename

1289133