Fourth order resonance of a high intensity linear accelerator*
- ORNL
For a high intensity beam, the 4\nu=1 resonance of a linear accelerator is manifested through the octupolar term of space charge potential when the depressed phase advance \sigma is close to and below 90 but no resonance effect is observed when \sigma just above 90 . To verify that this is a resonance, a frequency analysis is performed and a study of resonance crossing from above and from below the resonance is conducted. It is observed that this fourth order resonance is dominating over the better known envelope instability and practically replacing it. Simulation study shows a clear emittance growth by this resonance and its stopband. One of the authors [DJ] proposed an experiment to measure the stopband of this resonance to GSI using the UNILAC.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 981772
- Journal Information:
- Physical Review Special Topics - Accelerators and Beams, Vol. 12, Issue 5; ISSN 1098-4402
- Country of Publication:
- United States
- Language:
- English
Similar Records
PREDICTION OF 4\nu=1 RESONANCE OF A HIGH INTENSITY LINAC*
PREDICTION OF 4nu=1 RESONANCE OF A HIGH INTENSITY LINAC