Design of the Superconducting Magnet System for the New g-2/EDM Experiment in the J-PARC

被引：0

作者：

Sasaki, Ken-ichi ^{[1
]}

Abe, Mitsushi ^{[1
]}

Iinuma, Hiromi ^{[2
]}

Mibe, Tsutomu ^{[1
]}

Oyama, Shun ^{[3
]}

Saito, Naohito ^{[1
]}

Ando, Ryuya ^{[4
]}

Chiba, Tomoo ^{[4
]}

Koga, Tomoyuki ^{[4
]}

机构：

[1] High Energy Accelerator Res Org KEK, Tsukuba 3050801, Japan

[2] Ibaraki Univ, Mito 3108512, Japan

[3] Univ Tokyo, Bunkyo Ku, Tokyo 1138654, Japan

[4] Hitachi Ltd, Hitachi 1008280, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2023年 / 33卷 / 05期

关键词：

Superconducting magnets; Mesons; Magnetic separation; Magnetic moments; Solenoids; Superconducting coils; Magnetic shielding; Muon anomalous magnetic moment; superconducting solenoid; high homogeneous magnetic field; magnetic field shimming;

D O I：

10.1109/TASC.2023.3251283

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A superconducting solenoid system has been designed for the g-2/EDM experiment at the J-PARC, which is used to store muon beam of 0.3 GeV/c. High homogeneous magnetic field is required to be below +/- 0.1 ppm at 3 T within a muon storage region of 33.3 +/- 1.5 cm in radius and +/- 5 cm in height around the magnet center. The muon beam is spirally injected to the storage region from the top end of the magnet, therefore the magnetic field distribution is carefully designed in the region where the muon beam pass through. In order to achieve both requirements, NbTi superconducting coils are surrounded by an iron yoke with pole tips, which can optimize the field distribution by adjusting the shape and size. The superconducting coils are cooled by pool boiling in liquid helium, and the evaporated helium gas is re-condensed by GM cryocoolers to keep the liquid helium level for a long time. The main coils are operated in a persistent current mode to remove the magnetic field fluctuation with time caused by a power supply. This paper presents the current design of the magnet system for the experiment at the J-PARC.

引用

页数：5

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