INVESTIGATION OF COHERENT EMISSION FROM THE NSLS VUV RING.

Conference · Mon Mar 01 00:00:00 EST 1999

OSTI ID:15016690

CARR, G L; KRAMER, S L; MURPHY, J B; LAVEIGNE, J; LOBO, R P.S.; REITZE, D H; TANNER, D B

Bursts of coherent radiation are observed from the NSLS VUV ring near a wavelength of 7 mm. The bursts occur when the electron beam current (I) exceeds a threshold value (I{sub th}), which itself varies with ring operating conditions. Beyond threshold, the average intensity of the emission is found to increase as (I-I{sub th}){sup 2}. With other parameters held nearly constant, the threshold current value is found to increase quadratically with synchrotron frequency, indicating a linear dependence on momentum compaction. It is believed that the coherent emission is a consequence of micro-bunching of the electron beam due to the microwave instability.

• Research Organization: BROOKHAVEN NATIONAL LABORATORY (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 15016690
• Report Number(s): BNL-66994; R&D Project: LS1; KC0204011; TRN: US0502820
• Resource Relation: Conference: 1999 PARTICLE ACCELERATOR CONFERENCE, NEW YORK, NY (US), 03/31/1999--04/02/1999; Other Information: PBD: 1 Mar 1999
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
COHERENT RADIATION
ELECTRON BEAMS
INSTABILITY
SYNCHROTRONS
THRESHOLD CURRENT
WAVELENGTHS