scholarly journals Formation of emission plasma by a constricted arc discharge in a pulsed forevacuum plasma-cathode electron source

2021 ◽  
Vol 1862 (1) ◽  
pp. 012013
Author(s):  
A V Kazakov ◽  
E M Oks ◽  
N A Panchenko
2021 ◽  
Vol 2064 (1) ◽  
pp. 012124
Author(s):  
A V Kazakov ◽  
E M Oks ◽  
N A Panchenko

Abstract The research of influence of electron emission and processes associated with the formation of a pulsed large-radius electron beam on operation of a constricted arc discharge, which forms emission plasma in a forevacuum plasma-cathode electron source, is presented. Processes, occurring in case of generation of the electron beam at forevacuum pressure range 3–20 Pa, provide lower operating voltage of the constricted arc discharge. The constricted arc voltage decreases with increasing pressure and increasing accelerating voltage. However, at pressure more than 15 Pa, the arc voltage decreases until a certain minimum value is reached, and then arc voltage is almost independent on pressure and accelerating voltage. This minimum value of the constricted arc voltage is on average 1.5–2 times higher as compared with voltage of the cathodic arc at the same discharge current. The observed decrease of operating voltage of the constricted arc is most likely caused by accelerated back-streaming ions, which move toward the emission electrode from beam-produced plasma. These accelerated ions partially penetrate into the hollow anode of discharge system through the mesh emission electrode and facilitate formation of the arc plasma, and thus provides lower voltage of the constricted arc.


2013 ◽  
Vol 16 (2) ◽  
Author(s):  
Agus Purwadi ◽  
Bambang Siswanto ◽  
Wirjoadi . ◽  
Lely Susita R.M. ◽  
Sudjatmoko .

Plasma parameters in Plasma Cathode Electron Source Device (PCESD) are very important things because they will determine the eficiency of its electron extraction. Square pulse mode of PCESD’s arc discharge plasma current can be obtained by using Pulse Forming Network (PFN) circuits which is called Arc Discharge Power Supply (ADPS). The square pulse mode is necessity to simplify in electron irradiation dose calculation. ADPS is connected with Hollow Anode Chamber (HAC) which is placed inside of PCESD to produce arc discharge plasma. The value of arc discharge plasma current is the main key to determine plasma parameters that can be measured by using Rogowski coil. The value of the arc discharge plasma current is IADPS = 206.30 A with pulse width  = 80 μs. Whereas the plasma parameters values inside of the HAC are: the electron plasma density ne = (16.85  1019) m-3, electron plasma temperature Te = 2.609 eV, electron plasma frequency fe = 116.74 GHz, and Debye length λD = 9.958 µm respectively.


2017 ◽  
Vol 45 (8) ◽  
pp. 2075-2079 ◽  
Author(s):  
Alexander V. Medovnik ◽  
Viktor A. Burdovitsin ◽  
Andrey V. Kazakov ◽  
Efim M. Oks

2019 ◽  
Vol 1393 ◽  
pp. 012006
Author(s):  
S Yu Doroshkevich ◽  
M S Vorobyov ◽  
S S Kovalsky ◽  
I V Lopatin ◽  
N N Koval ◽  
...  

2015 ◽  
Vol 652 ◽  
pp. 012044 ◽  
Author(s):  
D Zolotukhin ◽  
V Burdovitsini ◽  
E Oks ◽  
A Tyunkov ◽  
Yu Yushkov

2013 ◽  
Vol 56 (6) ◽  
pp. 680-683 ◽  
Author(s):  
A. V. Kazakov ◽  
V. A. Burdovitsin ◽  
A. V. Medovnik ◽  
E. M. Oks

1973 ◽  
Vol 16 (10) ◽  
pp. 1437-1440
Author(s):  
S. P. Bugaev ◽  
F. Ya. Zagulov

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