 DOCUMENT METADATASLAC Publication: SLAC-PUB-14451
SLAC Release Date: June 2, 2011
Observation and Characterization of Coherent Optical Radiation and Microbunching Instability in the SLAC Next Linear Collider Test Accelerator
Weathersby, Stephen.
The NLC Test Accelerator (NLCTA) at SLAC is currently configured for a proof-of-principle echo-enabled harmonic generation (EEHG) experiment using a 120 MeV beam. During commissioning, unexpected coherent optical undulator radiation (CUR) and coherent optical transition radiation (COTR) was observed when beam is accelerated off-crest and compressed after the chicanes. The CUR and COTR is likely due to a microbunching instability where initial small modulations in the cathode drive laser pulse ar... Show Full Abstract
The NLC Test Accelerator (NLCTA) at SLAC is currently configured for a proof-of-principle echo-enabled harmonic generation (EEHG) experiment using a 120 MeV beam. During commissioning, unexpected coherent optical undulator radiation (CUR) and coherent optical transition radiation (COTR) was observed when beam is accelerated off-crest and compressed after the chicanes. The CUR and COTR is likely due to a microbunching instability where initial small modulations in the cathode drive laser pulse are compressed and amplified. In this paper we present the observation and characterization of the CUR, COTR and microbunching instability at NLCTA. Show Partial Abstract
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