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Title: FINAL TEST RESULTS FOR THE SNS RING DIPOLES.

Abstract

To meet the performance parameters of the Spallation Neutron Source (SNS) for high beam intensity with low losses, the compact accumulation ring will contain 32 sector dipoles with 1.44 m effective length and a large aperture, 170 mm. The magnets are built from potted coils and machined pieces of solid iron. When first assembled, the dipoles met the requirements for field uniformity but the rms variation of the integral transfer function (ITF) was much larger than design at both fields of interest, 1.11 T{center_dot}m and 1.33 T{center_dot}m, corresponding to proton energies of 1.0 GeV and 1.3 GeV respectively. Based on initial measurements, shims have been added to the return legs or poles, as appropriate, in order to bring the rms variation of the 1.0 GeV ITF to the specification, 0.01%. The value of the ITF rms variation at 1.3 GeV for the shimmed magnets is 0.033%. Sorting the magnets has significantly reduced the load on the correctors due to this ITF variation.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
DOE/SC (US)
OSTI Identifier:
812679
Report Number(s):
BNL-71403-2003-CP
R&D Project: 86455; 820101000; TRN: US0303470
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: 2003 PARTICLE ACCELERATOR CONFERENCE, PORTLAND, OR (US), 05/12/2003--05/16/2003; Other Information: PBD: 12 May 2003
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; DESIGN; DIPOLES; MAGNETS; NEUTRON SOURCES; PERFORMANCE; SPALLATION; TRANSFER FUNCTIONS

Citation Formats

WANDERER, P, JACKSON, J, JAIN, A, LEE, Y Y, MENG, W, PAPAPHILIPPOU, Y, SPATARO, C, TEPIKIAN, S, TSOUPAS, N, and WEI, J. FINAL TEST RESULTS FOR THE SNS RING DIPOLES.. United States: N. p., 2003. Web.
WANDERER, P, JACKSON, J, JAIN, A, LEE, Y Y, MENG, W, PAPAPHILIPPOU, Y, SPATARO, C, TEPIKIAN, S, TSOUPAS, N, & WEI, J. FINAL TEST RESULTS FOR THE SNS RING DIPOLES.. United States.
WANDERER, P, JACKSON, J, JAIN, A, LEE, Y Y, MENG, W, PAPAPHILIPPOU, Y, SPATARO, C, TEPIKIAN, S, TSOUPAS, N, and WEI, J. 2003. "FINAL TEST RESULTS FOR THE SNS RING DIPOLES.". United States. https://www.osti.gov/servlets/purl/812679.
@article{osti_812679,
title = {FINAL TEST RESULTS FOR THE SNS RING DIPOLES.},
author = {WANDERER, P and JACKSON, J and JAIN, A and LEE, Y Y and MENG, W and PAPAPHILIPPOU, Y and SPATARO, C and TEPIKIAN, S and TSOUPAS, N and WEI, J},
abstractNote = {To meet the performance parameters of the Spallation Neutron Source (SNS) for high beam intensity with low losses, the compact accumulation ring will contain 32 sector dipoles with 1.44 m effective length and a large aperture, 170 mm. The magnets are built from potted coils and machined pieces of solid iron. When first assembled, the dipoles met the requirements for field uniformity but the rms variation of the integral transfer function (ITF) was much larger than design at both fields of interest, 1.11 T{center_dot}m and 1.33 T{center_dot}m, corresponding to proton energies of 1.0 GeV and 1.3 GeV respectively. Based on initial measurements, shims have been added to the return legs or poles, as appropriate, in order to bring the rms variation of the 1.0 GeV ITF to the specification, 0.01%. The value of the ITF rms variation at 1.3 GeV for the shimmed magnets is 0.033%. Sorting the magnets has significantly reduced the load on the correctors due to this ITF variation.},
doi = {},
url = {https://www.osti.gov/biblio/812679}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {5}
}

Conference:
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