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Title: AGS Fast spin resonance jump, magnets and power supplies

Abstract

In order to cross more rapidly the 82 weak spin resonances caused by the horizontal tune and the partial snakes, we plan to jump the horizontal tune 82 times during the acceleration of polarized protons. The current in the magnets creating this tune jump will rise in 100 {micro}s, hold flat for about 4 ms and fan to zero in 100 {micro}s. Laminated beam transport quadrupole magnets have been recycled by installing new two turn coils and longitudinal laminated pole tip shims that reduce inductance and power supply current. The power supply uses a high voltage capacitor discharge to raise the magnet current, which is then switched to a low voltage supply, and then the current is switched back to the high voltage capacitor to zero the current. The current in each of the magnet pulses must match the order of magnitude change in proton momentum during the acceleration cycle. The magnet, power supply and operational experience are described.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
952541
Report Number(s):
BNL-81817-2009-CP
KB0202011; TRN: US0902528
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: Particle Accelerator Conference; Vancouver, B.C., Canada; 20090504 through 20090508
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATION; ACCELERATORS; BEAM TRANSPORT; BLOWERS; CAPACITORS; INDUCTANCE; MAGNETS; POWER SUPPLIES; PROTONS; QUADRUPOLES; RESONANCE; SPIN

Citation Formats

Glenn,J.W., Huang, H., Liaw, C. J., Marneris, I., Meng, W., Mi, J. L., Rosas, P., Sandberg, J., Tuozzolo, J., and Zhang, A.. AGS Fast spin resonance jump, magnets and power supplies. United States: N. p., 2009. Web.
Glenn,J.W., Huang, H., Liaw, C. J., Marneris, I., Meng, W., Mi, J. L., Rosas, P., Sandberg, J., Tuozzolo, J., & Zhang, A.. AGS Fast spin resonance jump, magnets and power supplies. United States.
Glenn,J.W., Huang, H., Liaw, C. J., Marneris, I., Meng, W., Mi, J. L., Rosas, P., Sandberg, J., Tuozzolo, J., and Zhang, A.. Mon . "AGS Fast spin resonance jump, magnets and power supplies". United States. https://www.osti.gov/servlets/purl/952541.
@article{osti_952541,
title = {AGS Fast spin resonance jump, magnets and power supplies},
author = {Glenn,J.W. and Huang, H. and Liaw, C. J. and Marneris, I. and Meng, W. and Mi, J. L. and Rosas, P. and Sandberg, J. and Tuozzolo, J. and Zhang, A.},
abstractNote = {In order to cross more rapidly the 82 weak spin resonances caused by the horizontal tune and the partial snakes, we plan to jump the horizontal tune 82 times during the acceleration of polarized protons. The current in the magnets creating this tune jump will rise in 100 {micro}s, hold flat for about 4 ms and fan to zero in 100 {micro}s. Laminated beam transport quadrupole magnets have been recycled by installing new two turn coils and longitudinal laminated pole tip shims that reduce inductance and power supply current. The power supply uses a high voltage capacitor discharge to raise the magnet current, which is then switched to a low voltage supply, and then the current is switched back to the high voltage capacitor to zero the current. The current in each of the magnet pulses must match the order of magnitude change in proton momentum during the acceleration cycle. The magnet, power supply and operational experience are described.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 04 00:00:00 EDT 2009},
month = {Mon May 04 00:00:00 EDT 2009}
}

Conference:
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