An Air-Core Type Superconducting Quadrupole Triplet for the BigRIPS Separator at RIKEN

Author

Kusaka, K. ; Kubo, T. ; Yano, Y. ; Kakutani, N. ; Ohsemochi, K. ; Kuriyama, T. ; Tsuchihashi, T. ; Sato, K.

Author_Institution

Nishina Center for Accel. Based Sci., RIKEN, Wako

Volume

18

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

240

Lastpage

243

Abstract

The BigRIPS fragment separator in the RIKEN RI beam factory has an air-core type superconducting quadrupole triplet as the first focusing element. The quadrupole triplet consists of three air-core superconducting coils having effective lengths of 500 mm, 800 mm, and 500 mm, and the maximum field gradients of 24 T/m, 20 T/m, and 20 T/m. All three quadrupoles are assembled into a single cryostat and cooled by liquid-helium bath cooling using a cryogenic plant. The coils have a flat racetrack shape and their warm bore radii are 90 mm, 120 mm, and 120 mm. Its cryostat characterized by gas-cooled current leads with multiple electrodes is also discussed.

Keywords

accelerator magnets; cryogenics; liquid helium; particle beam focusing; superconducting coils; superconducting magnets; BigRIPS fragment separator; RIKEN RI beam factory; accelerator magnets; air-core superconducting coils; air-core type superconducting quadrupole triplet; cryogenic plant; focusing element; gas-cooled current leads; liquid-helium bath cooling; liquid-helium cryogenic system; particle beam focusing; single cryostat; superconducting magnets; Accelerator magnets; liquid-helium cryogenic system; particle beam focusing superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2008.920801

Filename

4505525