Volume 98, Number 4, May 2012
|Number of page(s)||5|
|Published online||23 May 2012|
Spatio-temporal dynamics of relativistic electron bunches during the micro-bunching instability in storage rings
Synchrotron SOLEIL - Saint Aubin, BP 34, 91192 Gif-sur-Yvette, France, EU
Accepted: 17 April 2012
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.
PACS: 05.45.-a – Nonlinear dynamics and chaos / 29.20.db – Storage rings and colliders / 41.60.Cr – Free-electron lasers
© EPLA, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.