Influence of the cathode material in the cathode fall characteristics of a hydrogen hollow cathode glow-discharge

2018 ◽  
Vol 124 (3) ◽  
pp. 033302 ◽  
Author(s):  
V. Gonzalez-Fernandez ◽  
K. Grützmacher ◽  
C. Pérez ◽  
M. I. de la Rosa
Keyword(s):  
Glow Discharge ◽  
Cathode Material ◽  
Hollow Cathode ◽  
Cathode Fall

Optogalvanic Measurement of the Electric Field inside the Cathode Fall Region of Neon Hollow Cathode Discharge

1989 ◽  
Vol 43 (2) ◽  
pp. 245-248 ◽  
Author(s):  
Norihiro Ami ◽  
Akihide Wada ◽  
Yukio Adachi ◽  
Chiaki Hirose
Keyword(s):  
Glow Discharge ◽  
Electric Field ◽  
Hollow Cathode ◽  
Stark Effect ◽  
Cathode Surface ◽  
Hollow Cathode Discharge ◽  
Cathode Fall ◽  
Negative Glow ◽  
Optogalvanic Spectroscopy ◽  
The Difference

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.

The hollow-cathode effect and the theory of glow discharges

1954 ◽  
Vol 224 (1157) ◽  
pp. 209-227 ◽  
Keyword(s):  
Glow Discharge ◽  
Electric Field ◽  
Current Density ◽  
Hollow Cathode ◽  
Elementary Theory ◽  
Secondary Electron Emission ◽  
Space Charge Density ◽  
Cathode Fall ◽  
Space Length ◽  
Dark Space

The nature of the processes in the cathode dark space and the negative glow of a glow discharge is not well understood. Moreover, the existing theory leading to relations between the cathode fall in potential, the current density, the width of the dark space and the electric field distribution in it is based on dubious assumptions and does not indicate the important physical processes in operation. Thus further experimental evidence would be valuable in developing the theory. By exploring the electric field between two plane-parallel cathodes with an electron beam, and observing simultaneously the other discharge parameters, new information was obtained. A double (hollow) cathode was used because in a conventional glow discharge the dark space, cathode fall and current density are interdependent; here the cathode separation controls the width of the dark space. When the separation is sufficiently reduced the two negative glows coalesce and the light emitted as well as the cathode current density rise greatly. This is the hollow-cathode effect. Results show that the field in the two dark spaces of a hollow cathode falls linearly with the distance from the cathode, and thus the net space-charge density is constant, as it is known to be in the conventional discharge. From the same observations the dark-space length is found. The conclusions drawn from these results lead to an elementary theory which covers both the hollow and the conventional glow discharge in various gases as indeed it should, since with increasing cathode separation the first goes over into the second type. The main feature is the contribution of the ultra-violet quanta from the glow to the photo-electric emission from the cathodes which is regarded as the essential factor in secondary electron emission. Another result comes from a reconsideration of the motion of positive ions in the dark space based on atomic beam studies and the modem theory of elastic collisions between ions and atoms. The discrepancy between earlier experiments showing that ions of energy of the order of the cathode fall in potential arrive at the cathode and classical calculations leading to low ion energies is resolved by allowing for small-angle scattering and charge transfer.

Comparison of plasma characteristics of high-power pulsed sputtering glow discharge and hollow-cathode discharge

2020 ◽  
Vol 60 (1) ◽  
pp. 015501
Author(s):  
Shoki Abe ◽  
Katsuyuki Takahashi ◽  
Seiji Mukaigawa ◽  
Koichi Takaki ◽  
Ken Yukimura
Keyword(s):  
Glow Discharge ◽  
High Power ◽  
Hollow Cathode ◽  
Hollow Cathode Discharge ◽  
Plasma Characteristics

Plasma Treatment of Polyethylene Powder Particles in a Hollow Cathode Glow Discharge

2009 ◽  
Vol 6 (S1) ◽  
pp. S392-S396 ◽  
Author(s):  
Meike Quitzau ◽  
Matthias Wolter ◽  
Holger Kersten
Keyword(s):  
Glow Discharge ◽  
Plasma Treatment ◽  
Hollow Cathode ◽  
Powder Particles ◽  
Polyethylene Powder

Non-Self-Sustained Hollow-Cathode Glow Discharge at Low Burning Voltages

2019 ◽  
Vol 62 (4) ◽  
pp. 563-568
Author(s):  
V. V. Denisov ◽  
Yu. Kh. Akhmadeev ◽  
N. N. Koval ◽  
I. V. Lopatin ◽  
E. V. Ostroverkhov
Keyword(s):  
Glow Discharge ◽  
Hollow Cathode

Generation of Plasma in Non-Self-Sustained Glow Discharge With Hollow Cathode for Nitriding Inner Surfaces of Elongated and Complex Shaped Cavities

2020 ◽  
Vol 48 (6) ◽  
pp. 2050-2059
Author(s):  
Danil Yu. Ignatov ◽  
Ilya V. Lopatin ◽  
Vladimir V. Denisov ◽  
Nikolay N. Koval ◽  
Yuri H. Ahmadeev
Keyword(s):  
Glow Discharge ◽  
Hollow Cathode
Sign in / Sign up

Export Citation Format

Share Document