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Title: Observation of broadband self-amplified spontaneous coherent terahertz synchrotron radiation in a storage ring

Bursts of coherent synchrotron radiation at far-infrared and millimeter wavelengths have been observed at several storage rings. A microbunching instability has been proposed as the source for the bursts. However,the microbunching mechanism has yet to be elucidated. We provide the first evidence that the bursts are due to a microbunching instability driven by the emission of synchrotron radiation in the bunch. Observations made at the Advanced Light Source are consistent with the values predicted by a model for the microbunching proposed by Heifets and Stupakov. These results demonstrate a new instability regime for high energy synchrotron radiation sources and will impact the design of future sources.
Authors:
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Publication Date:
OSTI Identifier:
810527
Report Number(s):
LBNL-50459
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: AJ02MM; TRN: US0302803
DOE Contract Number:
AC03-76SF00098
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 89; Journal Issue: 22; Other Information: Journal Publication Date: November 25, 2002; PBD: 30 May 2002
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Director, Office of Science. Office of Basic Energy Sciences. Materials Science and Engineering Division (US)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 47 OTHER INSTRUMENTATION; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ADVANCED LIGHT SOURCE; DESIGN; INSTABILITY; STORAGE RINGS; SYNCHROTRON RADIATION; SYNCHROTRON RADIATION SOURCES; WAVELENGTHS