Controllable transition from positive space charge to negative space charge in an inverted cylindrical magnetron

2016 ◽  
Vol 23 (1) ◽  
pp. 013514 ◽  
Author(s):  
R. Rane ◽  
M. Bandyopadhyay ◽  
M. Ranjan ◽  
S. Mukherjee
Keyword(s):  
Space Charge ◽  
Cylindrical Magnetron ◽  
Positive Space Charge ◽  
Negative Space ◽  
Positive Space

The structure of the impulse corona in a rod/plane gap I. The positive corona

1970 ◽  
Vol 315 (1520) ◽  
pp. 1-25 ◽  
Keyword(s):  
Spatial Distribution ◽  
Electric Field ◽  
Space Charge ◽  
Negative Ions ◽  
Corona Discharges ◽  
Theoretical Derivation ◽  
Plane Electrode ◽  
Positive Space Charge ◽  
Positive Ion ◽  
Positive Space

The dissipation of space charge following the growth of impulse corona discharges in positive rod/earthed plane gaps has been measured with an electrostatic fluxmeter. A method is described to determine the spatial distribution and magnitude of the space charge together with the associated electric field. Initial positive ion densities of up to 100 μC m -3 have been found. The total positive space charge deposited in a 40 cm gap at 160 kV is 500 nC. Electrons emitted from the plane electrode as a result of corona channels crossing the gap are shown to be trapped in the discharge space as negative ions. The recovery of the gap over several seconds is largely due to ionic drift to the electrodes. A theoretical derivation of the rate of deionization agrees with observed values.

Thermally Stimulated Currents in the Range of Unity Gain Factor

1971 ◽  
Vol 26 (5) ◽  
pp. 819-823
Author(s):  
J. A. Bragagnolo ◽  
G. Dussel ◽  
K. W. Böer ◽  
G. A. Dussel
Keyword(s):  
Space Charge ◽  
Space Charge Region ◽  
Thermal Quenching ◽  
Gain Factor ◽  
Thermally Stimulated Current ◽  
Thermally Stimulated Currents ◽  
Positive Space Charge ◽  
Unity Gain ◽  
Positive Space

Abstract Thermally stimulated current-curves in CdS platelets with slit electrodes change their character when the photoelectric gain-factor increases above one. Here the photocurrent remains essentially frozen-in up to temperatures at which marked thermal quenching sets in. A positive space charge region is assumed to be responsible for the frozen-in photocurrent. A reliable TSC-analysis of the trap distribution can be conducted only for gain factors considerably below one.

scholarly journals EMERGING TRENDS IN WALL-FREE HALL THRUSTERS DEVELOPMENT

2021 ◽  
pp. 111-116
Author(s):  
I.V. Litovko ◽  
V.Yu. Bazhenov ◽  
A.A. Goncharov ◽  
A.N. Dobrovolsky ◽  
I.V. Naiko
Keyword(s):  
Electric Field ◽  
Space Charge ◽  
Hybrid Model ◽  
Cathode Surface ◽  
Virtual Cathode ◽  
Hall Thrusters ◽  
Positive Space Charge ◽  
Emerging Trends ◽  
New Type ◽  
Positive Space

2D-hybrid model was created for the proposed new type accelerator with a virtual cathode which allows to avoid sputtering of the cathode surface and to preserve the dynamics of accelerated ions. In the framework of the model, it was shown that ions first form a positive space charge in the system center, and eventually, under an ac-tion of created own electric field, emerge from both ends of the system.

Impact of positive space charge depletion layer on negatively charged and neutral centers in gold–diamond Schottky junctions

Carbon ◽  
2019 ◽  
Vol 153 ◽  
pp. 381-388 ◽  
Author(s):  
Kang Liu ◽  
Sen Zhang ◽  
Benjian Liu ◽  
Mingqi Sun ◽  
Jiwen Zhao ◽  
...  
Keyword(s):  
Space Charge ◽  
Depletion Layer ◽  
Positive Space Charge ◽  
Schottky Junctions ◽  
Positive Space ◽  
Charge Depletion
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