Pulsed, Inductively Generated, Streaming Plasma Ion Source for Heavy Ion Fusion Linacs

Glidden, Steven C. ; Sanders, Howard D ; Greenly, John B. ; Dongwoo, Daniel L.

Applied Pulsed Power, Inc.

关键词: Ion Sources;    Pulsed;    Breakdown;    Attenuation;    Shape Ion Source;   

DOI  :  10.2172/900203
RP-ID  :  DOE/ER83147-FINAL
RP-ID  :  FG02-01ER83147
RP-ID  :  900203

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report describes a compact, high current density, pulsed ion source, based on electrodeless, inductively driven gas breakdown, developed to meet the requirements on normalized emittance, current density, uniformity and pulse duration for an ion injector in a heavy-ion fusion driver. The plasma source produces >10 μs pulse of Argon plasma with ion current densities >100 mA/cm2 at 30 cm from the source and with strongly axially directed ion energy of about 80 eV, and sub-eV transverse temperature. The source has good reproducibility and spatial uniformity. Control of the current density during the pulse has been demonstrated with a novel modulator coil method which allows attenuation of the ion current density without significantly affecting the beam quality. This project was carried out in two phases. Phase 1 used source configurations adapted from light ion sources to demonstrate the feasibility of the concept. In Phase 2 the performance of the source was enhanced and quantified in greater detail, a modulator for controlling the pulse shape was developed, and experiments were conducted with the ions accelerated to >40 kV.