Abstract
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 (350-500keV, 100ns, 250J per pulse). Duration of diode operation, in a mode when electron current is limited by the emissive ability of the graphite cathode, is 15-20ns. 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 (150-200kV, 300-600ns) followed by the second positive (250-300kV, 150ns). 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 1.3cm/s. It is shown that for an area of flat cathode over 25cm 2, the influence of edge contribution does not exceed measurement error of total diode electron current (10).
| Original language | English |
|---|---|
| Article number | 649828 |
| Journal | Advances in High Energy Physics |
| Volume | 2011 |
| DOIs | |
| Publication status | Published - 2011 |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Influence of cathode diameter on the operation of a planar diode with an explosive emission cathode. / Isakova, Yulia I.; Kholodnaya, Galina E.; Pushkarev, Alexander I.
In: Advances in High Energy Physics, Vol. 2011, 649828, 2011.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Influence of cathode diameter on the operation of a planar diode with an explosive emission cathode
AU - Isakova, Yulia I.
AU - Kholodnaya, Galina E.
AU - Pushkarev, Alexander I.
PY - 2011
Y1 - 2011
N2 - 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 (350-500keV, 100ns, 250J per pulse). Duration of diode operation, in a mode when electron current is limited by the emissive ability of the graphite cathode, is 15-20ns. 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 (150-200kV, 300-600ns) followed by the second positive (250-300kV, 150ns). 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 1.3cm/s. It is shown that for an area of flat cathode over 25cm 2, the influence of edge contribution does not exceed measurement error of total diode electron current (10).
AB - 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 (350-500keV, 100ns, 250J per pulse). Duration of diode operation, in a mode when electron current is limited by the emissive ability of the graphite cathode, is 15-20ns. 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 (150-200kV, 300-600ns) followed by the second positive (250-300kV, 150ns). 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 1.3cm/s. It is shown that for an area of flat cathode over 25cm 2, the influence of edge contribution does not exceed measurement error of total diode electron current (10).
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U2 - 10.1155/2011/649828
DO - 10.1155/2011/649828
M3 - Article
VL - 2011
JO - Advances in High Energy Physics
JF - Advances in High Energy Physics
SN - 1687-7357
M1 - 649828
ER -