Average velocity of electrons in the cathode fall region during glow-discharge nitriding

2017 ◽  
Vol 62 (4) ◽  
pp. 527-536
Author(s):  
I. M. Pastukh ◽  
V. V. Lyukhovets’
Keyword(s):  
Glow Discharge ◽  
Average Velocity ◽  
Cathode Fall

Run-aways im Neutralgas

1961 ◽  
Vol 16 (3) ◽  
pp. 246-252 ◽  
Author(s):  
G. Ecker ◽  
K. G. Müller
Keyword(s):  
Relaxation Time ◽  
Boltzmann Equation ◽  
Glow Discharge ◽  
Initial Velocity ◽  
Average Velocity ◽  
Electron Beams ◽  
Critical Value ◽  
Inelastic Collisions ◽  
Stopping Power ◽  
Scattering Parameters

The motion of electrons as determined by the field acceleration and the elastic and inelastic collisions with the gas atoms is calculated from the BOLTZMANN equation. We derive the average velocity and the scattering ellipsoid as a function of time. For particles starting from rest there exists always a critical electric field Ec depending on pressure and temperature. Below this critical value electrons approach the stationary drift process. Above the critical value the electrons do not reach a stationary state, they “run away”. For a finite initial velocity ν0 and a field below the critical value Ec the particles are either accelerated to drift, or decelerated to drift, or “run away”, depending on the value ν0. From a calculation of the scattering parameters we find for E > Ec a focussing effect in the velocity space which increases with field strength. Also the relaxation time for the drift process and the stopping power for electron beams can be calculated. Applications to the glow discharge are discussed.

scholarly journals Emission Spectroscopy of the Cathode Fall Region of an Analytical Glow Discharge

1997 ◽  
Vol 07 (C4) ◽  
pp. C4-247-C4-258 ◽  
Author(s):  
N. Konjevic ◽  
I. R. Videnovic ◽  
M. M. Kuraica
Keyword(s):  
Glow Discharge ◽  
Emission Spectroscopy ◽  
Cathode Fall

scholarly journals Some Comments on Cathode Fall Theories in Low Pressure Glow Discharge

1991 ◽  
Vol 111 (5) ◽  
pp. 383-388 ◽  
Author(s):  
Hiroshi Mase ◽  
Toshio Tanabe ◽  
Takashi Ikehata
Keyword(s):  
Glow Discharge ◽  
Low Pressure ◽  
Cathode Fall ◽  
Pressure Glow Discharge

Influence of Heavy Particle Collision on Optical Emission in Cathode Fall of DC Argon/Silane Glow Discharge

1994 ◽  
Vol 33 (Part 1, No. 7B) ◽  
pp. 4357-4360 ◽  
Author(s):  
Yoshinobu Matsuda ◽  
Kazumi Ano ◽  
Hiroharu Kawasaki ◽  
Hiroshi Fujiyama
Keyword(s):  
Glow Discharge ◽  
Heavy Particle ◽  
Optical Emission ◽  
Particle Collision ◽  
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.

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