Intense ion beam generation in a diode with explosive emission cathode in self-magnetically insulated mode

2015 ◽  
Vol 69 (2) ◽  
Author(s):  
Alexander Pushkarev ◽  
Yulia Isakova ◽  
Iliya Khailov
Keyword(s):  
Ion Beam ◽  
Explosive Emission ◽  
Beam Generation ◽  
Explosive Emission Cathode ◽  
Emission Cathode

scholarly journals Correlation analysis of intense ion beam energy in a self magnetically insulated diode

2014 ◽  
Vol 32 (2) ◽  
pp. 311-319 ◽  
Author(s):  
A.I. Pushkarev ◽  
Yu.I. Isakova ◽  
I.P. Khaylov
Keyword(s):  
Energy Density ◽  
Correlation Analysis ◽  
Beam Energy ◽  
Ion Beam ◽  
Coefficient Of Determination ◽  
Anode Surface ◽  
Explosive Emission ◽  
Beam Energy Density ◽  
Explosive Emission Cathode ◽  
Emission Cathode

AbstractThis paper presents the results of a statistical and correlation analysis of the energy and energy density of an ion beam formed by a self-magnetically insulated diode with an explosive emission cathode. The experiments were carried out with the TEMP-4M accelerator operating in double-pulse mode: plasma formation occurs during the first pulse (negative polarity, 300–500 ns, 100–150 kV), and ion extraction and acceleration during the second pulse (positive polarity, 120 ns, 250–300 kV). Various arrangements of diodes have been investigated: strip focusing and planar diodes, a conical focusing diode and a spiral diode. The total ion beam energy was measured using both a calorimeter and an infrared camera and the beam energy density was measured by the thermal imaging and acoustic diagnostics. The correlation analysis showed that ion current density is only weakly dependent on the accelerating voltage and other output parameters of the accelerator, with the coefficient of determination <0.3. At the same time, in this paper, we have identified that the total energy of the beam and the energy density is strongly dependant on the accelerator output parameters, since the coefficient of determination >0.9. The mechanism governing stabilization of the beam energy density from shot to shot was discovered and attributed to formation of the neutral component in ion beam as being due to charge exchange between accelerated ions and neutral molecules from a neutral layer near the anode surface. Implementation using a self-magnetically insulated diode with an explosive-emission cathode, having an operational lifetime of up to 106 shots, has promising prospects for various technological applications.

Activation of the explosive-emission cathode under various conditions of preinitiation

Vacuum ◽  
2017 ◽  
Vol 143 ◽  
pp. 473-478 ◽  
Author(s):  
S.A. Shunailov ◽  
M.I. Yalandin ◽  
K.A. Sharypov ◽  
M.D. Kolomiets ◽  
M.R. Ulmasculov ◽  
...  
Keyword(s):  
Explosive Emission ◽  
Explosive Emission Cathode ◽  
Emission Cathode

Research on an improved explosive emission cathode

2009 ◽  
Vol 42 (12) ◽  
pp. 125204 ◽  
Author(s):  
Guozhi Liu ◽  
Jun Sun ◽  
Hao Shao ◽  
Changhua Chen ◽  
Xiaowei Zhang
Keyword(s):  
Explosive Emission ◽  
Explosive Emission Cathode ◽  
Emission Cathode

scholarly journals Influence of Cathode Diameter on the Operation of a Planar Diode with an Explosive Emission Cathode

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Yulia I. Isakova ◽  
Galina E. Kholodnaya ◽  
Alexander I. Pushkarev
Keyword(s):  
Experimental Investigations ◽  
Electron Current ◽  
Explosive Emission ◽  
Total Electron ◽  
Planar Diode ◽  
Graphite Cathode ◽  
Nanosecond Pulses ◽  
Ion Accelerator ◽  
Explosive Emission Cathode ◽  
Emission Cathode

This paper presents the results of experimental investigations into the current-voltage characteristics of a planar diode with an explosive emission cathode made from graphite. Studies were performed using a TEU-500 pulsed electron accelerator (350–500 keV, 100 ns, 250 J per pulse). Duration of diode operation, in a mode when electron current is limited by the emissive ability of the graphite cathode, is 15–20 ns. The contribution of the cathode periphery to total electron current appears only as an increase in the emissive surface area due to an expansion of explosive plasma. Investigations of an ion diode with a graphite cathode (plane and focusing geometry) were also carried out. Experiments were performed using a TEMP-4M ion accelerator, which forms two nanosecond pulses: the first negative pulse (150–200 kV, 300–600 ns) followed by the second positive (250–300 kV, 150 ns). Total diode current in the first pulse is well described by the Child-Langmuir law for electron current at a constant rate of plasma expansion, equal to 1.3 cm/μs. It is shown that for an area of flat cathode over 25 cm2, the influence of edge contribution does not exceed measurement error of total diode electron current (10%).

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