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Title: Adjustable Permanent Quadrupoles Using Rotating Magnet Material Rods for the Next Linear Collider.

Abstract

The proposed Next Linear Collider (NLC) will require over 1400 adjustable quadrupoles between the main linacs' accelerator structures. These 12.7 mm bore quadrupoles will have a range of integrated strength from 0.6 to 132 Tesla, with a maximum gradient of 135 Tesla per meter, an adjustment range of +0 -20% and effective lengths from 324 mm to 972 mm. The magnetic center must remain stable to within 1 micrometer during the 20% adjustment. In an effort to reduce estimated costs and increase reliability, several designs using hybrid permanent magnets have been developed. All magnets have iron poles and use either Samarium Cobalt or Neodymium Iron to provide the magnetic fields. Two prototypes use rotating rods containing permanent magnetic material to vary the gradient. Gradient changes of 20% and center shifts of less than 20 microns have been measured. These data are compared to an equivalent electromagnet prototype. See High Reliability Prototype Quadrupole for the Next Linear Collider by C.E Rago, C.M SPENCER, Z. Wolf submitted to this conference.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
799917
Report Number(s):
SLAC-PUB-8991
TRN: US0206158
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 23 Aug 2002
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; COBALT; ELECTROMAGNETS; IRON; LINEAR ACCELERATORS; LINEAR COLLIDERS; MAGNETIC FIELDS; MAGNETIC MATERIALS; MAGNETS; NEODYMIUM; PERMANENT MAGNETS; QUADRUPOLES; RELIABILITY; SAMARIUM

Citation Formats

Spencer, Cherrill M. Adjustable Permanent Quadrupoles Using Rotating Magnet Material Rods for the Next Linear Collider.. United States: N. p., 2002. Web. doi:10.2172/799917.
Spencer, Cherrill M. Adjustable Permanent Quadrupoles Using Rotating Magnet Material Rods for the Next Linear Collider.. United States. doi:10.2172/799917.
Spencer, Cherrill M. Fri . "Adjustable Permanent Quadrupoles Using Rotating Magnet Material Rods for the Next Linear Collider.". United States. doi:10.2172/799917. https://www.osti.gov/servlets/purl/799917.
@article{osti_799917,
title = {Adjustable Permanent Quadrupoles Using Rotating Magnet Material Rods for the Next Linear Collider.},
author = {Spencer, Cherrill M},
abstractNote = {The proposed Next Linear Collider (NLC) will require over 1400 adjustable quadrupoles between the main linacs' accelerator structures. These 12.7 mm bore quadrupoles will have a range of integrated strength from 0.6 to 132 Tesla, with a maximum gradient of 135 Tesla per meter, an adjustment range of +0 -20% and effective lengths from 324 mm to 972 mm. The magnetic center must remain stable to within 1 micrometer during the 20% adjustment. In an effort to reduce estimated costs and increase reliability, several designs using hybrid permanent magnets have been developed. All magnets have iron poles and use either Samarium Cobalt or Neodymium Iron to provide the magnetic fields. Two prototypes use rotating rods containing permanent magnetic material to vary the gradient. Gradient changes of 20% and center shifts of less than 20 microns have been measured. These data are compared to an equivalent electromagnet prototype. See High Reliability Prototype Quadrupole for the Next Linear Collider by C.E Rago, C.M SPENCER, Z. Wolf submitted to this conference.},
doi = {10.2172/799917},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {8}
}

Technical Report:

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