Multi-Pulse Diode-Isolated-Blumlein Induction-Cell Drivers
2017 IEEE 21ST INTERNATIONAL CONFERENCE ON PULSED POWER (PPC)(2017)
Abstract
The Dual-Axis Radiographic Hydrodynamic Test (DARHT) facility at Los Alamos National Laboratory (LANL) uses two, linear-induction accelerators (LIAs) for flash, x-ray radiography of hydrodynamic tests. The Axis-I LIA uses a single, beam pulse of 60 ns, 20 MeV, and 2 kA. The Axis-II LIA uses a long beam pulse, and a kicker to generate four radiation pulses.The National Nuclear Security Agency (NNSA) is planning a new, multi-pulse, single-axis, electron LIA for hydrodynamic experiments. One method for generating multiple, beam pulses on a single axis, without a kicker, is to multi pulse the injector and each accelerator cell. Diode-isolated Blumleins are being considered as the pulsed-power drivers for the accelerator cells.On DARHT Axis-I, the Blumleins are dc connected to the cells such that when they are charged, the connected cells' magnetic cores are also preset. With diodes in the circuit, this dc path is not available. This paper describes the 300-kV, diode-isolated Blumlein concept, performance requirements, Blumlein charging options, core preset methods, and circuit simulation results.
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Key words
Dual-Axis Radiographic Hydrodynamic Test facility,Los Alamos National Laboratory,linear-induction accelerators,hydrodynamic tests,single beam pulse,Axis-II LIA,long beam pulse,kicker,radiation pulses,National Nuclear Security Agency,single-axis,electron LIA,hydrodynamic experiments,single axis,accelerator cell,diode-isolated Blumleins,pulsed-power drivers,connected cells,diode-isolated Blumlein concept,Blumlein charging options,X-ray radiography,injector,multipulse diode-isolated-Blumlein induction-cell drivers,DARHT Axis-I,LANL,NNSA,time 60.0 ns,electron volt energy 20.0 MeV,current 2.0 kA,voltage 300 kV
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