Coherent Synchrotron Radiation and Bunch Stability in a Compact Storage Ring

Technical Report · Tue Jan 25 04:00:00 EST 2005

DOI:https://doi.org/10.2172/839821· OSTI ID:839821

Venturini, M ^[1]

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1. SLAC

We examine the effect of the collective force due to coherent synchrotron radiation (CSR) in an electron storage ring with small bending radius. In a computation based on time-domain integration of the nonlinear Vlasov equation, we find the threshold current for a longitudinal microwave instability induced by CSR alone. The model accounts for suppression of radiation at long wavelengths due to shielding by the vacuum chamber. In a calculation just above threshold, small ripples in the charge distribution build up over a fraction of a synchrotron period, but then die out to yield a relatively smooth but altered distribution with eventual oscillations in bunch length. The instability evolves from small noise on an initial smooth bunch of rms length much greater than the shielding cutoff.

• Research Organization: Stanford Linear Accelerator Center (SLAC), Menlo Park, CA
• Sponsoring Organization: SC
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 839821
• Report Number(s): SLAC-PUB-10994
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BENDING
BOLTZMANN-VLASOV EQUATION
CHARGE DISTRIBUTION
DISTRIBUTION
ELECTRONS
INSTABILITY
OSCILLATIONS
RADIATIONS
SHIELDING
STABILITY
STORAGE RINGS
SYNCHROTRON RADIATION
SYNCHROTRONS
THRESHOLD CURRENT
WAVELENGTHS