Stability Issues of the Mu2e Proton Beam
Stability issues of the mu2e proton beam are discussed. These include space-charge distortion of bunch shape, microwave instabilities, mode-coupling instabilities, head-tail instabilities, as well as electron-cloud effects. We have studied several beam stability issues of the proton beam heading to the target for the mu2e experiment. We find bunch-shape distortions driven by the space charge force is reasonably small, and longitudinal microwave instability will unlikely to occur. Electron-cloud buildup, with density up to {rho}{sub e} {approx} 2 x 10{sup 12} m{sup -3} in the Accumulator, can probably drive head-tail instabilities. However, these, together with the instabilities driven by the resistive-wall impedance can be avoided by restricting the chromaticity to larger than {approx} 0.2. TMCI will not occur even when the electron-cloud wake is included.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 952255
- Report Number(s):
- FERMILAB-CONF-09-128-AD; TRN: US0902449
- Resource Relation:
- Conference: Presented at Particle Accelerator Conference (PAC 09), Vancouver, BC, Canada, 4-8 May 2009
- Country of Publication:
- United States
- Language:
- English
Similar Records
Introduction to collective instabilities----longitudinal and transverse
Space charge and beam stability issues of the Fermilab proton driver in Phase I