High-current electron beam formation in an explosive emission diode at ∼10/sup -2/-10

Abdullin, E. N.; Bazhenov, G. P.

doi:10.1109/27.782287

Cited by 3 publications

(2 citation statements)

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“…The experimental results presented by Abdullin et al 20 suggest that in going from the pressure 10 −5 -10 −4 to 10 −2 -10 −1 torr, the vacuum diode retains its properties to a large extent. Among the most important properties are the limitation of the current value and the existence of a quasistationary discharge phase, testifying to a limited emissive capacity of the cathode plasma.…”

Section: Parameters Influencing the Diode Currentmentioning

confidence: 87%

“…As a result, the velocity of the cathode plasma motion toward the anode decreases, and the duration of the electron beam extracted from the plasma can be rather long. 20 When the current is emitted from the cathode of a gasfilled diode ͑few tens of mTorr air͒, an ion channel is created by the electron impact collision with neutral gas and the ion density in the channel will be increased. Full space-charge neutralization at the diode occurs at the moment when the ion density is equal to the electron beam density inside the gas-filled diode region.…”

Section: Parameters Influencing the Diode Currentmentioning

confidence: 99%

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Electron beam current in high power cylindrical diode

et al. 2010

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Intense electron beam generation studies were carried out in high power cylindrical diode to investigate the effect of the accelerating gap and diode voltage on the electron beam current. The diode voltage has been varied from 130 to 356 kV, whereas the current density has been varied from 87 to 391 A/cm2 with 100 ns pulse duration. The experimentally obtained electron beam current in the cylindrical diode has been compared with the Langmuir–Blodgett law. It was found that the diode current can be explained by a model of anode and cathode plasma expanding toward each other. However, the diode voltage and current do not follow the bipolar space-charge limited flow model. It was also found that initially only a part of the cathode take part in the emission process. The plasma expands at 4.2 cm/μs for 1.7 cm anode-cathode gap and the plasma velocity decreases for smaller gaps. The electrode plasma expansion velocity of the cylindrical diode is much smaller as compared with the planar diode for the same accelerating gap and diode voltage. Therefore, much higher voltage can be obtained for the cylindrical diodes as compared with the planar diodes for the same accelerating gap.

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Section: Parameters Influencing the Diode Currentmentioning

confidence: 87%

Section: Parameters Influencing the Diode Currentmentioning

confidence: 99%