Study of Transient Ripple in Synchrotron – Practical Applications

Author

Shirakabe, Yoshihisa ; Mori, Yojiro ; Muto, Masayuki ; Sakai, Tadashi ; Yamazaki, Choji ; Yoshino, Tomonobu

Author_Institution

Inst. of Particle & Nucl.Studies, KEK High Energy Accel. Res. Organ., Tsukuba, Japan

Volume

61

Issue

5

fYear

2014

fDate

Oct. 2014

Firstpage

2588

Lastpage

2594

Abstract

Characteristics of ripples generated as transient responses with idealized current patterns in synchrotrons are studied along with practical applications. The ripples intrinsically occur in synchrotron magnets as a driven harmonic oscillation whenever ramp pattern currents are applied to the magnets. In realistic synchrotron magnet circuits, additionally, damping resistors and interconnection types should be taken into account, because they largely change such circuit parameters as resistance and capacitance. In this paper, effects of damping resistance and conductor types, such as cables and bus-bars, on intrinsic ripples are studied. Simulated results are obtained within realistic circumstances of J-PARC Main-ring Synchrotron in the present 30 GeV operations.

Keywords

accelerator magnets; busbars; cables (electric); capacitance; damping; electric resistance; particle beam diagnostics; resistors; synchrotrons; J-PARC Main-ring Synchrotron; bus-bars; cables; circuit parameters; conductor types; damping resistance; damping resistors; harmonic oscillation; idealized current patterns; interconnection types; intrinsic ripples; ramp pattern currents; synchrotron magnet circuits; synchrotron magnets; transient responses; transient ripples; Capacitance; Damping; Magnetic circuits; Magnetic tunneling; Magnetomechanical effects; Resistors; Synchrotrons; Acceleration; beam loss; capacitance; inductance; magnets; oscillations; proton synchrotrons; ripples;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2014.2347345

Filename

6895320