Stability conditions for a neutralised electron cooling beam

Author

Bosser, J. ; Maury, S. ; Möhl, D. ; Varenne, F. ; Meshkov, I. ; Syresin, E. ; Mustafin, E. ; Zenkevich, P.

Author_Institution

CERN, Geneva, Switzerland

Volume

5

fYear

1995

fDate

1-5 May 1995

Firstpage

2940

Abstract

Charge neutralisation of the cooling electron beam, e.g. by stationary ions produced from the residual gas, is desirable to compensate the space-charge induced velocity spread which tends to reduce the cooling force. However, it has been demonstrated by Parkhomchuk and collaborators (1993) that two-stream instabilities, especially transverse dipole modes, are a serious threat to the stability. In the present report we analyse stabilising mechanisms including Landau damping, external feedback and clearing of reflected electrons. Experimental results at LEAR (the Low Energy Antiproton Ring at CERN) are discussed in a companion paper at this conference

Keywords

beam handling techniques; particle beam stability; space charge; LEAR; Landau damping; Low Energy Antiproton Ring; charge neutralisation; cooling force; external feedback; neutralised electron cooling beam; reflected electrons clearing; residual gas; space-charge induced velocity spread; stationary ions; transverse dipole modes; two-stream instabilities; Collaboration; Cooling; Damping; Electron beams; Electron traps; Equations; Feedback; Frequency; Message-oriented middleware; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505744

Filename

505744