Title :
Investigation of coherent emission from the NSLS VUV ring
Author :
Carr, G.L. ; Kramer, S.L. ; Murphy, J.B. ; LaVeign, J. ; Lobo, R.P.S.M. ; Reitze, D.H. ; Tanner, D.B.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
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 (Ith), which itself varies with ring operating conditions. Beyond threshold, the average intensity of the emission is found to increase as (I-Ith)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
Keywords :
electron accelerators; particle beam bunching; particle beam stability; storage rings; synchrotron radiation; 7 mm; NSLS VUV ring; coherent emission; coherent radiation; electron beam current; micro-bunching; microwave instability; momentum compaction; ring operating conditions; synchrotron frequency; Compaction; Electron beams; Electron emission; Frequency; Infrared detectors; Magnets; Optical waveguides; Radiation detectors; Storage rings; Synchrotron radiation;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795644
