Measurement of transverse multipole moments of the proton beam in the J-PARC MR

T. Toyama, T. Koseki, H. Kuboki, M. Okada, W. Uno, Y. Nakanishi, A. Ichikawa, K. Nakamura, T. Nakaya, A. Minamino

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Transverse multipole moments (quadrupole and more) of the beam may give important information of the beam such as beam sizes, nonlinear resonances and so on. However higher moments are difficult to measure because signal-to-noise-ratio becomes smaller proportional to (x/R)n, (y/R)n, where x: horizontal position of the charged particle, y: vertical position of the charged particle, R: vacuum-duct-radius. In order to increase the SNR and to extend the multipole order, we developed and installed a 16 electrode beam monitor in the J-PARC MR. Principle, results from BEM calculation and wire mapping, and a beam test are presented.

Original languageEnglish
Title of host publicationIPAC 2017 - Proceedings of the 8th International Particle Accelerator Conference
PublisherJoint Accelerator Conferences Website - JACoW
Pages274-276
Number of pages3
ISBN (Electronic)9783954501823
Publication statusPublished - 2017 Jul
Event8th International Particle Accelerator Conference, IPAC 2017 - Bella Conference Center, Denmark
Duration: 2017 May 142017 May 19

Publication series

NameIPAC 2017 - Proceedings of the 8th International Particle Accelerator Conference

Conference

Conference8th International Particle Accelerator Conference, IPAC 2017
Country/TerritoryDenmark
CityBella Conference Center
Period17/5/1417/5/19

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