Volume 109, Number 6, March 2015
|Number of page(s)||6|
|Published online||25 May 2015|
Transverse emittance-preserving arc compressor for high-brightness electron beam-based light sources and colliders
Elettra Sincrotrone Trieste - 34149 Basovizza, Trieste, Italy
Received: 13 January 2015
Accepted: 17 March 2015
Bunch length magnetic compression is used in high-brightness linacs driving free-electron lasers (FELs) and particle colliders to increase the peak current of the injected beam. To date, it is performed in dedicated insertions made of few degrees bending magnets and the compression factor is limited by the degradation of the beam transverse emittance owing to emission of coherent synchrotron radiation (CSR). We reformulate the known concept of CSR-driven optics balance for the general case of varying bunch length and demonstrate, through analytical and numerical results, that a 500 pC charge beam can be time-compressed in a periodic 180 deg arc at 2.4 GeV beam energy and lower, by a factor of up to 45, reaching peak currents of up to 2 kA and with a normalized emittance growth at the rad level. The proposed solution offers new schemes of beam longitudinal gymnastics; an application to an energy recovery linac driving FEL is discussed.
PACS: 29.20.-c – Accelerators / 29.27.Bd – Beam dynamics; collective effects and instabilities / 41.60.Cr – Free-electron lasers
© EPLA, 2015
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.