J. Bosser et al., ACTIVE METHODS OF INSTABILITY SUPPRESSION IN A NEUTRALIZED ELECTRON-BEAM, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 391(1), 1997, pp. 110-113
A large space-charge is detrimental to the cooling process of a dense
beam, Generation of a neutralised electron beam is restricted by beam-
drift instability. To suppress this instability, active methods are us
ed: a kicker with a transverse electric field (shaker) and longitudina
l electrodes placed in the vacuum chamber and in the gun region expel
secondary electrons. Results of experiments dedicated to the developme
nt of beam stabilisation on the JINR test bench and in the electron co
oling system at LEAR are discussed.