Cooling of particle beams: Intrabeam scattering, envelope instability and shear
- 作者：Seurer ; M. ; Toepffer ; C. ; Variale ; V. ; Pisent ; A. ; Tecchio ; L. ; Burov ; A.
- 关键词：29.20.Dh ; 29.27.Bd ; Beam dynamics ; Emittance growth ; Intrabeam scattering ; Beam crystallization ; Instabilities
- 刊名：Nuclear Instruments and Methods in Physics Research Section A ; Accelerators ; Spectrometers ; Detectors and Associated Equipment
- 出版年：1997
- 期刊代码：41_01689002
- 类别：ph
- 出版时间：August 11, 1997
- 卷：395
- 期：2
- 页码：275-280
- 文件大小：417 K
摘要
We investigate the dynamics of strongly coupled beams upon cooling, using molecular dynamics (MD) computer simulations. In the quest for crystalline beams in storage rings one has to overcome shear forces in the bending magnets as well as emittance growth due to envelope instabilities and intrabeam scattering (IBS). We show that for zero-current phase-advances σb>0 b> < 90° even one-dimensional longitudinal cooling is effective, as the beam is stable and the transversal degrees of freedom are cooled indirectly through IBS. The case σb>0 b> > 90° requires very high three-dimensional cooling rates in order to overcome envelope instabilities. The influence of the bending angle on the cooling process is investigated with two independent simulation codes, whose results agree very well.