Measured cathode fall characteristics depending on the diameter of a hydrogen hollow cathode discharge

Radial distribution of the electric field in the cathode fall region of neon hollow cathode discharge has been derived through the observation of the linear Stark effect of the nd′ ( n = 10–12)-3 p′[½]1 transitions by two-step optogalvanic spectroscopy. The field strength was found to decrease monotonically from the cathode to the negative glow. The depth of the cathode fall region was 0.80 ± 0.05 mm, and the electric field at the cathode surface was 5.2 ± 0.2 kV/cm*—values which compare with the reported values of around 3–4 mm and 3–4 kV/cm in the cathode fall region of Ne glow discharge. The difference and similarity in the values of derived parameters are discussed.

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Spatial variation of the linewidth of Kr atomic lines as observed on optogalvanic signals in cathode fall region of hollow cathode discharge

Optics Communications ◽

10.1016/0030-4018(83)90370-x ◽

1983 ◽

Vol 48 (2) ◽

pp. 121-124 ◽

Cited By ~ 12

Author(s):

K. Kawakita ◽

T. Nakajima ◽

Y. Adachi ◽

S. Maeda ◽

C. Hirose

Keyword(s):

Spatial Variation ◽

Hollow Cathode ◽

Hollow Cathode Discharge ◽

Cathode Fall ◽

Atomic Lines

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Optogalvanic Measurement of the Cathode-Fall Region of Kr Hollow Cathode Discharge

Applied Spectroscopy ◽

10.1366/0003702874448490 ◽

1987 ◽

Vol 41 (4) ◽

pp. 567-572 ◽

Cited By ~ 17

Author(s):

Shigehiko Fujimaki ◽

Yukio Adachi ◽

Chiaki Hirose

Keyword(s):

Hollow Cathode ◽

Cathode Surface ◽

Radial Distance ◽

Hollow Cathode Discharge ◽

Theoretical Formula ◽

Cathode Fall ◽

Negative Glow ◽

Penning Ionization ◽

Torr Pressure ◽

Discharge Parameters

Optogalvanic observation of the Stark shift of the Kr 8d[3/2]20-5p[3/2]2 atomic line has been carried out on a Kr hollow cathode discharge in a discharge tube with a cylindrical cathode, at a fill pressure of 1 to 6 Torr (1 Torr = 133.322 Pa), and a discharge current from 1 to 10 mA, to reveal the linear decrease of electric field with radial distance from the cathode surface. Values of current density, charge density, and other discharge parameters have been derived and their behavior has been compared with theoretical formula; it is concluded that a major role is played by the photons from the negative-glow region. Unusual features observed in the discharge at 1 Torr pressure and above 5 mA of current have been attributed to the effect of Penning ionization of sputtered copper atoms.

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Theoretical Study of the Electric Field Distribution in the Cathode Fall Region of a Spherical Hollow Cathode Discharge

Applied Spectroscopy ◽

10.1366/0003702991946127 ◽

1999 ◽

Vol 53 (12) ◽

pp. 1638-1641 ◽

Cited By ~ 1

Author(s):

P. D. Mixon

Keyword(s):

Electric Field ◽

Field Distribution ◽

Hollow Cathode ◽

Electric Field Distribution ◽

Theoretical Study ◽

Hollow Cathode Discharge ◽

Cathode Fall ◽

Spherical Hollow

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Space Charge Distribution in the Cathode Fall Region of an Ar Hollow Cathode Discharge

Applied Spectroscopy ◽

10.1366/0003702884428743 ◽

1988 ◽

Vol 42 (1) ◽

pp. 49-51 ◽

Cited By ~ 15

Author(s):

Takashi Masaki ◽

Akihide Wada ◽

Yukio Adachi ◽

Chiaki Hirose

Keyword(s):

Space Charge ◽

Hollow Cathode ◽

Discharge Current ◽

Cathode Surface ◽

Space Charge Density ◽

Hollow Cathode Discharge ◽

Radial Position ◽

Cathode Fall ◽

Stark Spectroscopy ◽

Space Charge Distribution

The electric field above the cathode surface of an Ar hollow cathode discharge has been measured by optogalvanic Stark spectroscopy. The field depends on the radial position of illumination and describes the radial distribution of the space charge density, ρ(r), as ρ(r) = –Ar + B, where r is the radial position and the parameters A and B are positive. The values of A and B increase with the discharge current, but the width of the cathode fall region remains nearly constant at about 1.02 ± 0.03 mm for a brass cathode of 5 mm i. d.

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