TITLE

Measurements of beam current density and proton fraction of a permanent-magnet microwave ion source

AUTHOR(S)
Waldmann, Ole; Ludewigt, Bernhard
PUB. DATE
November 2011
SOURCE
Review of Scientific Instruments;Nov2011, Vol. 82 Issue 11, p113505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A permanent-magnet microwave ion source has been built for use in a high-yield, compact neutron generator. The source has been designed to produce up to 100 mA of deuterium and tritium ions. The electron-cyclotron resonance condition is met at a microwave frequency of 2.45 GHz and a magnetic field strength of 87.5 mT. The source operates at a low hydrogen gas pressure of about 0.15 Pa. Hydrogen beams with a current density of 40 mA/cm2 have been extracted at a microwave power of 450 W. The dependence of the extracted proton beam fraction on wall materials and operating parameters was measured and found to vary from 45% for steel to 95% for boron nitride as a wall liner material.
ACCESSION #
67538027

 

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