Magnetic Field Tracking at CSNS/RCS

Because of the differences of magnetic saturation and eddy current effects between different magnets, magnetic field tracking errors between different magnets is larger than 2.5 % at the Rapid Cycling Synchrotron (RCS) of Chinese Spallation Neutron Source (CSNS), and the induced tune shift is larger than 0.1. So larger tune shift may lead the beam to pass through the resonance lines. To reduce the magnetic field tracking errors, a method of wave form compensation for magnets of the Rapid Cycling Synchrotron was investigated on the magnets of CSNS/RCS. The wave form compensation was applied to CSNS/RCS commissioning. By performing wave form compensation, the maximum magnetic field tracking error was reduced from 2.5 % to 0.08 %, and the maximum tune shift over the ramping process was reduced from 0.1 to 0.004.

controls
MMI
acceleration
quadrupole
dipole

References(10)

Figures(0)

[1]

Status of CSNS Project

S.N. Fu

[2]

An Overview of Design for CSNS/RCS and Beam Transport

S. Wang

- Astronomy 54 (2011) 239-244

[3]

Effects of Magnetic Field Tracking Errors on Beam Dynamics at J-PARC RCS

H. Hotchi

[4]

Effects of Magnetic Field Tracking Errors and Space Charge on Beam Dynamics at CSNS/RCS

S.Y. Xu

[5]

Study on the Effects of Chromaticity and Magnetic Field Tracking Errors at CSNS/RCS

S.Y. Xu

[6]

Design of RCS Magnets for J-PARC 3GeV Synchrotron

N. Tani

- Appl.Supercond. 14 (2004) 409-412

[7]

Proton Accelerator Development in China

S.N. Fu

[8]

Magnet System of the J-PARC RCS

N. Tani

[9]

A Harmonic Coil Measurement System Based on a Dynamics Signal Acquisition Device

J.X. Zhou

- Nucl.Instrum.Meth.A 624 (2010) 549-553

[10]

Proceedings, 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB2018) : Daejeon, Korea, June 17-22, 2018

Dong-O. Jeon
(
- IBS, Daejeon
)
(ed.)
,
Dong-Eon Kim
(
- Pohang Accelerator Lab.
)
(ed.)
,
Volker R.W. Schaa
(
- Darmstadt, GSI
)
(ed.)