Beam Instability and Microbunching Due to Coherent Synchrotron Radiation
- SLAC
A relativistic electron beam moving on a circular orbit in free space can radiate coherently if the wavelength of the synchrotron radiation exceeds the length of the bunch. In accelerators coherent synchrotron radiation (CSR) of the bunch is usually suppressed by the shielding effect of the conducting walls of the vacuum chamber. However an initial density fluctuations with a characteristic length much shorter than the bunch length can radiate coherently. If the radiation results in the growth of the initial fluctuation, one can expect an instability which leads to micro-bunching of the beam and increased coherent radiation at short wavelengths. Such an instability is studied theoretically in this paper. The effect of the beam energy spread and the shielding due to the conducting walls is included into consideration. The condition for the instability is evaluated for several existing accelerators.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 784869
- Report Number(s):
- SLAC-PUB-8761
- Country of Publication:
- United States
- Language:
- English
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