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Title: Variable Permanent Magnet Quadrupole

Abstract

A permanent magnet quadrupole (PMQ) is one of the candidates for the final focus lens in a linear collider. An over 120 T/m strong variable permanent magnet quadrupole is achieved by the introduction of saturated iron and a 'double ring structure'. A fabricated PMQ achieved 24 T integrated gradient with 20 mm bore diameter, 100 mm magnet diameter and 20 cm pole length. The strength of the PMQ is adjustable in 1.4 T steps, due to its 'double ring structure': the PMQ is split into two nested rings; the outer ring is sliced along the beam line into four parts and is rotated to change the strength. This paper describes the variable PMQ from fabrication to recent adjustments.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
907959
Report Number(s):
SLAC-PUB-12504
TRN: US0703604
DOE Contract Number:
AC02-76SF00515
Resource Type:
Journal Article
Resource Relation:
Journal Name: IEEE Trans.Appl.Supercond.16:224, 2006; Journal Volume: 16; Journal Issue: 224
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; FABRICATION; IRON; LINEAR COLLIDERS; MAGNETS; PERMANENT MAGNETS; QUADRUPOLES; Accelerators,ACCPHY

Citation Formats

Mihara, T., Iwashita, Y., /Kyoto U., Kumada, M., /NIRS, Chiba, Spencer, C.M., and /SLAC. Variable Permanent Magnet Quadrupole. United States: N. p., 2007. Web.
Mihara, T., Iwashita, Y., /Kyoto U., Kumada, M., /NIRS, Chiba, Spencer, C.M., & /SLAC. Variable Permanent Magnet Quadrupole. United States.
Mihara, T., Iwashita, Y., /Kyoto U., Kumada, M., /NIRS, Chiba, Spencer, C.M., and /SLAC. Wed . "Variable Permanent Magnet Quadrupole". United States. doi:. https://www.osti.gov/servlets/purl/907959.
@article{osti_907959,
title = {Variable Permanent Magnet Quadrupole},
author = {Mihara, T. and Iwashita, Y. and /Kyoto U. and Kumada, M. and /NIRS, Chiba and Spencer, C.M. and /SLAC},
abstractNote = {A permanent magnet quadrupole (PMQ) is one of the candidates for the final focus lens in a linear collider. An over 120 T/m strong variable permanent magnet quadrupole is achieved by the introduction of saturated iron and a 'double ring structure'. A fabricated PMQ achieved 24 T integrated gradient with 20 mm bore diameter, 100 mm magnet diameter and 20 cm pole length. The strength of the PMQ is adjustable in 1.4 T steps, due to its 'double ring structure': the PMQ is split into two nested rings; the outer ring is sliced along the beam line into four parts and is rotated to change the strength. This paper describes the variable PMQ from fabrication to recent adjustments.},
doi = {},
journal = {IEEE Trans.Appl.Supercond.16:224, 2006},
number = 224,
volume = 16,
place = {United States},
year = {Wed May 23 00:00:00 EDT 2007},
month = {Wed May 23 00:00:00 EDT 2007}
}