High Density Plasma in a High Pressure Hydrogen Capillary Discharge

Summary form only given. Measurements of electron plasma density generated in a hydrogen-filled hollow cathode capillary discharge are reported. The capillary is made of borosilicate glass. H alpha line and H beta line stark broadening are used to diagnose the plasma density. A 60 KV peak voltage, 7...

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Bibliographic Details
Main Authors: Chen, Hao, Kallos, Efthymios, Muggli, Patric, Kuthi, Andras, Katsouleas, Thomas C., Gundersen, Martin A.
Format: Conference Proceeding
Language:English
Subjects:
Breakdown voltage
Cathodes
Density measurement
Electrodes
Electrons
Glass
Hydrogen
Plasma accelerators
Plasma density
Plasma measurements
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Summary:Summary form only given. Measurements of electron plasma density generated in a hydrogen-filled hollow cathode capillary discharge are reported. The capillary is made of borosilicate glass. H alpha line and H beta line stark broadening are used to diagnose the plasma density. A 60 KV peak voltage, 75 ns pulse was applied, which was in excess of the breakdown voltage of the high pressure (>1 atm) hydrogen capillary. Preliminary results indicate that ap10 19 cm -3 electron density can be obtained. The dependence of the plasma density on the capillary length; the capillary diameter; the gas pressure; the electrode geometry; and the discharge V-I characteristics are presented, and potential applications to plasma wakefield accelerators are also discussed.
ISSN:0730-9244
2576-7208
DOI:10.1109/PPPS.2007.4345594