The ATA is an induction accelerator designed to produce 70 ns pulses of electrons at currents of 10 kA and energies in excess of 50 MeV. The accelerator is capable of operating at an average rate of 5 Hz or at 1 kHz for ten pulses. The parameters were chosen primarily to provide the experimental basis for advancing the understanding of electron beam propaga tion physics. The 85 m accelerator has been under construction for the past four years and has adopted mainly an Improved version of the ETA technology to satisfy the required parameters. Initial operation of the facility and the energy conversion system from primary power to axial electric field will be described; recent advances in magnetic switching which hive beer incorporated in the injector will also be dlscusseo.
The Advanced Test Accelerator (ATA) is a pulsed linear induction accelerator with the following design parameters: 50 HeV, 10 kA, 70 ns, and 1 kHz in a ten-pulse burst, Acceleration is accomplished by means of 190 ferrite-loaded cells, each capable of maintaining a 250 kV voltage pulse for 70 ns across a 1-inch gap. The unique characteristic of this machine is its I kHz burst mode capability at very high currents, This paper describes the pulse power development program which used the Experimental Test Accelerator (ETA) technology as a starting base.' Considerable changes have been made both electrically and mechanically in the pulse power components with special consideration being given to the design to achieve higher reliability. A prototype module which incorporates all the pulse power components has been built and tested for millions of shots. Prototype components and test results are described.
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