PERIODIC MAGNETIC FOCUSING OF SHEET ELECTRON-BEAMS

被引：68

作者：

BOOSKE, JH ^{[1
]}

BASTEN, MA ^{[1
]}

KUMBASAR, AH ^{[1
]}

ANTONSEN, TM ^{[1
]}

BIDWELL, SW ^{[1
]}

CARMEL, Y ^{[1
]}

DESTLER, WW ^{[1
]}

GRANATSTEIN, VL ^{[1
]}

RADACK, DJ ^{[1
]}

机构：

[1] UNIV MARYLAND, PLASMA RES LAB, COLLEGE PK, MD 20742 USA

来源：

PHYSICS OF PLASMAS | 1994年 / 1卷 / 05期

关键词：

D O I：

10.1063/1.870675

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Sheet electron beams focused by periodically cusped magnetic (PCM) fields are stable against low-frequency velocity-shear instabilities (such as the diocotron mode). This is in contrast to the more familiar unstable behavior in uniform solenoidal magnetic fields. A period-averaged analytic model shows that a PCM-focused beam is stabilized by ponderomotive forces for short PCM periods. Numerical particle simulations for a semi-infinite sheet beam verify this prediction and also indicate diocotron stability for long PCM periods is less constraining than providing for space-charge confinement and trajectory stability in the PCM focusing system. In this article the issue of beam matching and side focusing for sheet beams of finite width is also discussed. A review of past and present theoretical and experimental investigations of sheet-beam transport is presented.

引用

页码：1714 / 1720

页数：7

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