Measurement of space charge effect on transverse emittance

Author

Cousineau, S. ; Fung, K. ; Ball, M. ; Chu, C.M. ; Derenchuk, V. ; East, G. ; Friesel, D. ; Guo, W. ; Harbi, A. ; Lee, S.Y. ; Sloan, T. ; Wang, S. ; Zhang, Y. ; Holmes, Justin ; Shastry, S. ; Ng, K.Y.

Author_Institution

IUCF, Indiana Univ., Indianapolis, IN, USA

Volume

4

fYear

2001

fDate

2001

Firstpage

2911

Abstract

The SNS accumulator ring is designed to compress 1.5×10¹⁴ 1 GeV protons from a bunch train of 1000 μs H^- to a single proton bunch with bunch length 700 ns. The injection scenario of the SNS is experimentally simulated at the Cooler Injector Synchrotron (CIS) at Indiana University. A 100 μs, 7 MeV H ^- bunch train from the RFQ and DTL is compressed into a single proton bunch with bunch length ⩽ 150 ns. The transverse rms emittance of the 7 MeV beam is measured by the quadrupole tuning method in the CIS extraction line. Measurements are taken at various beam intensities with peak currents ranging from a few mA to hundreds of mA. Results are compared with simulation, and the effects of multiple strip foil transits and space charge are discussed

Keywords

particle beam bunching; particle beam diagnostics; particle beam injection; proton accelerators; space charge; storage rings; 1 GeV; 100 mus; 150 ns; 7 MeV; 700 mus; Cooler Injector Synchrotron; DTL; RFQ; SNS accumulator ring; injection; proton bunch; quadrupole tuning method; space charge; strip foil; transverse emittance; transverse rms emittance; Charge measurement; Computational Intelligence Society; Current measurement; Linear particle accelerator; Magnetic separation; Neutrons; Particle beams; Protons; Radio frequency; Space charge;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Conference_Location

Chicago, IL

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.987952

Filename

987952