RADLAC-II Upgrade Experiments

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Shape, C. A. Frost,. D. E. Hasti,. G. T. Leifestc,. M. G. Mazarakis,. J. W. Poukey, and D. L. .... Fi i;uri' ?(h: i? ii pinl:ol~ p!,,,t ,.rr- !I'11 tnf 5 hr.;im pr0~11l~:~il hv t !
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RADLAC-II

UPGRADE EXPERIMENTS

Shape, S. I,. C. A. Frost, D. E. Hasti, G. T. Leifestc, G. Mazarakis, M. J. W. Poukey, and D. L. Smith Sandia National Laboratories 87185 Albuquerque, New Mexico Abstract

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'l‘llo linear induction accelrratar, RADLAC IT, is ili-i~~g upgrnded to produce a 20.MeV, 40-kA, annular Prior to the upgrade, RADLAC II t'ltrtror, heam. Modifications I!roducecI a 15-MeV, 15-kA electron beam. to the pulsed power, injector, and magnetic transport h:l~~~c rrsulted in a faster rising flat-topped voltage plse. A high quality, 40-k.4, 2.0.cm diameter beam xitll a low perpendicular thermal velocity, j3lc, has The high 'IP~II produced from the injector, 81ing added to RADLAC II and transport experiments :Ilroili;h the full accelerator are beginning. Simulations show the beam quality will be maintained il~roup,t~ t.hi‘ entire accelerator.

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Introduction RAI)lAC 1I is a pulsed, high gradient linear The electron beam is produced it duction accelerator. in R 5-?leV injector and transported in a 20-kG magnetic 2.5 KeV accelerating gaps that :;,~iiic, field through six, The ~;:crc designed to minimize beam instabilities.1 Ip~rFo~-m~l:~ce of the accelerator has been improved by ctr-oigh:-forward changes to the pulsed power and The upgrade was modifications to the injector.*a3 The first step was I~:1 (‘:i,-,-Pl-,i I ‘3i’ i t ‘; ( [I 1c )

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