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Proceedings Paper

Negative deuterium ion thermal energy measurements in a volume ion source
Author(s): Marthe Bacal; C. Courteille; Pascal Devynck; Yolanda Jones-King; Renan Leroy; Raul A. Stern
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Paper Abstract

1407_64A diagnostic technique has been developed to determine the negative hydrogen ion (H-/D-) thermal energy in a variety of conditions in a volume production ion source. The method is based on Nd:YAG laser photodetachment of the negative ions. The photodetachment produces local changes in the ion and electron densities, whose space and time evolution are traced by the use of a probe and a time-delayed second Nd:YAG laser pulse. The results of measurements using this technique for deuterium ions are described. Information was collected from the center of the source to near the plasma electrode. The effects of the presence of electric and magnetic fields near the probe during measurements are addressed. The present study demonstrates that the extracted ion current is equal to the thermal flux through the extraction aperture.

Paper Details

Date Published: 1 April 1991
PDF: 5 pages
Proc. SPIE 1407, Intense Microwave and Particle Beams II, (1 April 1991); doi: 10.1117/12.43534
Show Author Affiliations
Marthe Bacal, Ecole Polytechnique (France)
C. Courteille, Ecole Polytechnique (France)
Pascal Devynck, Ecole Polytechnique (France)
Yolanda Jones-King, Ecole Polytechnique (United States)
Renan Leroy, Ecole Polytechnique (France)
Raul A. Stern, Ecole Polytechnique (United States)


Published in SPIE Proceedings Vol. 1407:
Intense Microwave and Particle Beams II
Howard E. Brandt, Editor(s)

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