Comparison of observed and predicted bremsstrahlung doses in the PBFA-II facility
PBFA-II is a 36-module particle beam fusion accelerator at Sandia National Laboratories that became operational in December 1985. The 100-TW, 4-MJ accelerator is being used to study inertial confinement fusion with light ion beams. The light ions, electrostatically accelerated to an energy of up to 30 MeV, are emitted from a large-area anode source in the central vacuum section and, when ignition experiments begin in 1988, will focus onto a fusion target. Significant bremsstrahlung can be produced on every shot from electron losses in the diode or feeds. Shielding personnel and electronics was an important concern during the accelerator design phase and has continued to be important during the characterization phase. A three-dimensional Monte Carlo electron-photon transport code was used to design shielding for maximum bremsstrahlung doses. The simulated facility geometry included the 33-m-diameter accelerator tank, radiation shields above and below the vacuum section, the high bay housing PBFA II, the basement alcoves, the control/monitor data acquisition system (CM/DAS) shield room in the low bay, and the earth and air surrounding the facility.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6831994
- Report Number(s):
- SAND-86-1758C; CONF-870405-1; ON: DE86014971
- Country of Publication:
- United States
- Language:
- English
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