PBFA-II Energy Storage System Configuration and Characteristics

摘要

PBFA-II is the second thirty-six module particle beam accelerator built by Sandia for ICF fusion feasibility studies. Each module of the machine is designed to deliver 2.8 terawatts to a central experimental chamber. The total power delivered (100 terawatts) is expected to permit ignition scaling studies beginning in 1986. The PBFA-II energy storage system consists of thirty-six 6.0 MV, 400 kJ Marx generators set in an annular oil tank at the outer periphery of the accelerator. In order to properly drive the machine's downline pulse-forming section and the accelerator load, the Marx generator set must erect with a first-to-last spread of less than 40 nsec. The energy storage section is triggered by a chain of pulse amplifiers, beginning with a low voltage trigger pulse from the main control system and culminating in thirty-six 540 kV, 80 nsec risetime pulses delivered to the individual Marx generators. Each generator then erects in a 110 kA, 5.3 MV, 1.0 mu sec risetime pulse to charge the pulse-forming section. At this time, the entire energy storage section has been assembled and initial testing has begun on the charging, firing, and arming systems. Performance characteristics, as well as an operating point and procedure, are being determined for each of the support systems, in preparation for upcoming tests of the Marx generators. (ERA citation 10:038594)