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Title: DIPOLE AND QUADRUPOLE SORTING FOR THE SNS RING.

Abstract

The Spallation Neutron Source (SNS) accumulator ring is a high intensity ring and must have low uncontrolled losses for hands on maintenance. To achieve these low losses one needs very tight tolerance. These tight tolerances have been achieved through shimming the magnets and sorting. Dipoles are solid core magnets and had very good field quality but magnet to magnet variation were sorted out according to ITF, since all the dipole are powered with one power supply. Typically, sorting is done to minimize linear effects in beam dynamics. Here, sorting of quadrupoles was done according to a scheme, which allows reducing unwanted strength of nonlinear resonances. As a result, the strength of sextupole resonances for our base line tune-box was strongly reduced which was confirmed by a subsequent beam dynamics simulation.

Authors:
Publication Date:
Research Org.:
BROOKHAVEN NATIONAL LABORATORY (US)
Sponsoring Org.:
DOE/OFFICE OF SCIENCE (US)
OSTI Identifier:
15007970
Report Number(s):
BNL-71976-2004-CP
R&D Project: 86485; 39KC0200; TRN: US0402920
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: 9TH EUROPEAN PARTICLE ACCELERATOR CONFERENCE, LUCERNE (CH), 07/05/2004--07/09/2004; Other Information: PBD: 5 Jul 2004
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; AVAILABILITY; BEAM DYNAMICS; DIPOLES; MAGNETS; MAINTENANCE; NEUTRON SOURCES; QUADRUPOLES; SIMULATION; SORTING; SPALLATION; TANKS; TOLERANCE

Citation Formats

RAPARIA,D.FEDOTOV,A.LEE,Y.Y.ET AL. DIPOLE AND QUADRUPOLE SORTING FOR THE SNS RING.. United States: N. p., 2004. Web.
RAPARIA,D.FEDOTOV,A.LEE,Y.Y.ET AL. DIPOLE AND QUADRUPOLE SORTING FOR THE SNS RING.. United States.
RAPARIA,D.FEDOTOV,A.LEE,Y.Y.ET AL. 2004. "DIPOLE AND QUADRUPOLE SORTING FOR THE SNS RING.". United States. https://www.osti.gov/servlets/purl/15007970.
@article{osti_15007970,
title = {DIPOLE AND QUADRUPOLE SORTING FOR THE SNS RING.},
author = {RAPARIA,D.FEDOTOV,A.LEE,Y.Y.ET AL.},
abstractNote = {The Spallation Neutron Source (SNS) accumulator ring is a high intensity ring and must have low uncontrolled losses for hands on maintenance. To achieve these low losses one needs very tight tolerance. These tight tolerances have been achieved through shimming the magnets and sorting. Dipoles are solid core magnets and had very good field quality but magnet to magnet variation were sorted out according to ITF, since all the dipole are powered with one power supply. Typically, sorting is done to minimize linear effects in beam dynamics. Here, sorting of quadrupoles was done according to a scheme, which allows reducing unwanted strength of nonlinear resonances. As a result, the strength of sextupole resonances for our base line tune-box was strongly reduced which was confirmed by a subsequent beam dynamics simulation.},
doi = {},
url = {https://www.osti.gov/biblio/15007970}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jul 05 00:00:00 EDT 2004},
month = {Mon Jul 05 00:00:00 EDT 2004}
}

Conference:
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