Longitudinal Beam Profile Measurements of the Microbunching Instability

Authors: W. Shields (John Adams Institute (JAI), Royal Holloway, Egham, UK.) , A. Finn (John Adams Institute (JAI), Royal Holloway, Egham, UK) , P. Karataev (John Adams Institute (JAI), Royal Holloway, Egham, UK) , Riccardo Bartolini (Diamond Light Source) , I.p.s. Martin (Diamond Light Source) , Guenther Rehm (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: IPAC 2014
Peer Reviewed: No

State: Published (Approved)
Published: July 2014

Abstract: The microbunching instability is a phenomenon characterised by the onset of radiation bursts above a threshold bunch current. These bursts consist of coherent emissions with wavelengths comparable to the bunch length and shorter. the instability has recently been observed at Diamond Light Source, a 3rd generation light source. The operating conditions for triggering the instability at Diamond Light Source are well known, however measuring the spectral content of the resulting emissions is a more challenging investigation. A Michelson interferometer has been installed with the aim of recording the coherent spectrum from the bunches using ultra fast response Schottky Barrier Diode detectors. the longitudinal profile of the bunches can be estimated with subsequent analysis.

Subject Areas: Technique Development, Engineering

Technical Areas: Accelerator Physics , Controls , Detectors , Diagnostics