Spatio-temporal dynamics of relativistic electron bunches during the micro-bunching instability in storage rings

被引：27

作者：

Evain, C. ^{[1
]}

Barros, J. ^{[1
]}

Loulergue, A. ^{[1
]}

Tordeux, M. A. ^{[1
]}

Nagaoka, R. ^{[1
]}

Labat, M. ^{[1
]}

Cassinari, L. ^{[1
]}

Creff, G. ^{[1
]}

Manceron, L. ^{[1
]}

Brubach, J. B. ^{[1
]}

Roy, P. ^{[1
]}

Couprie, M. E. ^{[1
]}

机构：

[1] Synchrotron SOLEIL St Aubin, F-91192 Gif Sur Yvette, France

来源：

EPL | 2012年 / 98卷 / 04期

关键词：

RADIATION;

D O I：

10.1209/0295-5075/98/40006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The intense Coherent Synchrotron Radiation emitted in the Terahertz range by relativistic electron bunches circulating in a storage ring is an attractive source for spectroscopy. Its stability is related to the electron bunch dynamics, and can exhibit a bursting behavior resulting from the irregular presence of micro-structures in the bunch. We evidence here the existence of two thresholds in the electron bunch spatio-temporal dynamics, associated with different levels of Terahertz signal fluctuations, with increasing number of electrons. The first threshold indicates the presence of micro-structures drifting in the bunch profile, and the second one appears when those micro-structures are strong enough to persist after about half a revolution period of the electron-bunch in the phase-space. Their prediction thanks to numerical simulations are confirmed by experiments at the synchrotron SOLEIL. Copyright (C) EPLA, 2012

引用

页数：5

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