Electron swarm parameters measured using photoelectrons induced by a pulse laser

Electron swarm parameters such as drift velocity and ionization coefficient are measured using photoelectrons induced by a pulse laser. In order to measure parameters in a wide region of E / p , a pulsed dc voltage synchronized with the pulse laser is applied between electrodes with a pure configura...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1996-08, Vol.35 (8), p.4525-4530
Main Authors: SAKURAI, T, ITO, Y, UEDA, T, INOUE, Y, HORI, H
Format: Article
Language:English
Subjects:
Electrical properties (ionization, breakdown, electron and ion mobility, etc.)
Exact sciences and technology
Physics
Physics of gases
Physics of gases, plasmas and electric discharges
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Summary:Electron swarm parameters such as drift velocity and ionization coefficient are measured using photoelectrons induced by a pulse laser. In order to measure parameters in a wide region of E / p , a pulsed dc voltage synchronized with the pulse laser is applied between electrodes with a pure configuration to keep the electric field uniform. Dynamic behavior of electrons is observed as a transient waveform of an induced current. From the analysis of the waveform, the drift velocity and the ionization coefficient in helium gas can be obtained at E / p up to 500 and 4000 V/cm·Torr, respectively. Further experiments are performed using an actual discharge tube or a gas mixture of halogen and helium. The results are discussed in comparison with those obtained with a pure configuration of electrodes.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.35.4525