NSLS-II Booster Design
- Brookhaven National Lab. (BNL), Upton, NY (United States)
The NSLS-II booster is required to produce a 3 GeV bunch train with an accelerated charge of about 10 nC at a repetition rate of 1 Hz and a horizontal beam emittance around 40 nm-rad. Injection into the booster ring takes place at an energy of 200 MeV. The booster magnetic field and RF voltage are ramped for 500 ms to accelerate the electron beam from the injection energy to the nominal energy of 3 GeV. At the maximum field of the ramp, the electron beam is extracted from the booster and injected into the Storage Ring. We allow for a maximum beam loss of 30% during injection, 20% maximum loss during extraction. Thus the charge to be accelerated in the booster is 10 nC which corresponds to an average beam current of 20 mA. Since the dynamic aperture of the storage ring is limited, the quality of the injected beam has received serious consideration. In particular, the booster emittance may impact the injection efficiency. As the beam intensity in the storage ring is intended to be quasi-constant by frequently (once per minute) injecting beam into the storage ring (top-off injection) good injection efficiency is mandatory to minimize the frequency of top-off cycles, radiation dose induced by the lost electrons and perturbations of the stored beam orbit driven by the injection transients. During the last 10 years, many 3rd generation synchrotron light facilities have been put into operation. Nearly all of these facilities have chosen a full energy booster synchrotron as an injector together with a low energy linac as pre-injector.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- SC0012704
- OSTI ID:
- 1480933
- Report Number(s):
- NSLSII-ASD-TN-061; BNL-211069-2019-TECH
- Country of Publication:
- United States
- Language:
- English
Similar Records
NSLS-II injector commissioning and initial operation
Operation of the NSLS-II Injector with a Lower Booster Injection Energy