Published 2022 | Version v1
Miscellaneous Metadata-only

Upgrade of triplet magnets at J-PARC MUSE

Creators

  • 1. High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki (Japan)
  • 2. NAT Corporation, Tokai, Ibaraki (Japan)

Description

The decay muon beamline (D-line) at the Materials and Life Science Experimental Facility (MLF) in J-PARC has two experimental areas (D1, D2). In the D1 area condensed matter physics experiments are mainly carried out using surface muons (30 MeV/c). While the muon momentum can be adjusted according to the experimental condition, in recent years experimenters require to use muon beam with higher momentum (>90 MeV/c). However, the triple quadrupole magnets (D1 triplet) installed just upstream of the D1 experimental area is limited to transporting muons with 70 MeV/c at most. Therefore, an existing high-momentum-capable triplet was upgraded to be used as a new D1 triplet by modifying the magnet pitch and fabricating a new base. The performance of this D1 triplet is evaluated by comparing the parameters before and after the upgrade, and the GL product is optimized for the beam optics. (author)

Availability note (English)

Available from https://www.pasj.jp/web_publish/pasj2022/proceedings/PDF/TUP0/TUP034.pdf

Abstract (Japanese)

J-PARC物質・生命科学実験施設(MLF)における崩壊ミュオンビームライン(Dライン)の二つの実験エリア(D1, D2)の内D1実験エリアでは主に表面ミュオン(30MeV/c相当)を用いた物性実験が行われている。当エリアでは実験条件によってミュオンの運動量を変えることができ、近年ではより高い運動量(90MeV/c)のミュオンを用いた実験が要求されるようになった。しかし、D1実験エリア直前に設置されている四重極三重項電磁石(D1トリプレット)では70MeV/cのミュオンを輸送するのが限界である。そこで、高運動量対応の既存トリプレットを再構築しD1トリプレットとして使えるように電磁石ピッチの変更、新規架台の製作等の改変を施し、将来的に120MeV/cのミュオンを輸送できるようにアップグレードされた。今回の発表ではD1トリプレットのアップグレード前後のパラメータ比較による性能評価およびビームオプティクスに対するGL積の最適化について報告する。(著者)
Part of:
Proceedings of the 19th annual meeting of Particle Accelerator Society of Japan

Additional details

Additional titles

Original title (Japanese)
J-PARC MUSEにおけるトリプレット電磁石のアップグレード

Identifiers

URL
https://www.pasj.jp/web_publish/pasj2022/proceedings/PDF/TUP0/TUP034.pdf; https://www.pasj.jp/web_publish/pasj2022/proceedings/index.html;

Publishing Information

Imprint Title
Proceedings of the 19th annual meeting of Particle Accelerator Society of Japan
Imprint Pagination
[1163 p.]
Journal Page Range
p. 379-381

Conference

Title
19. annual meeting of Particle Accelerator Society of Japan. Online-held
Acronym
PASJ2022
Dates
18-21 Oct 2022
Place
Japan (Japan)

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
54073504
Subject category
S43: PARTICLE ACCELERATORS;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
ACCELERATOR EXPERIMENTAL FACILITIES; BEAM TRANSPORT; ELECTRIC CURRENTS; ELECTROMAGNETS; EXCITATION; J-PARC; MAGNETIC FIELDS; MUON BEAMS; OPTIMIZATION; POWER SUPPLIES
Descriptors DEC
BEAMS; CURRENTS; ELECTRICAL EQUIPMENT; ELECTRONIC EQUIPMENT; ENERGY-LEVEL TRANSITIONS; EQUIPMENT; LEPTON BEAMS; MAGNETS; PARTICLE BEAMS

Optional Information

Notes
8 figs., 3 tabs. Imprint:This symposium was held online