The role of multielectrode geometry in the generation of pulsed intense electron beams in preionization-controlled open-ended hollow-cathode transient discharges

Dewald, E. L.; Ganciu, M.; Mandache, B.N.; Musa, G.; Nistor, Magda; Pointu, A. M.; Popescu, I.; Frank, K.; Hoffmann, D. H. H.; Stark, R.H.

doi:10.1109/27.602500

Cited by 23 publications

(23 citation statements)

References 12 publications

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“…X rays with energies of several kiloelectron-volts more were measured. The X-ray output was proportional to the integrated output energy of the high-energy electron beam [2,7]. In low-speed pumping, the valve of the vacuum pump was at least half closed to decrease the exhaust speed, and the pressure in the glass tube seemed to be nearly equal to the pressure in the vacuum chamber.…”

Section: Nitrogen Gas Pressure Dependence Of Electron Beam Generationmentioning

confidence: 99%

Production of a pulsed high-density electron beam by channel spark discharge

Nakagawa

Kawauchi

2001

Elect. Eng. Jpn.

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The characteristics of the generation of a high‐energy electron beam by a channel spark discharge were investigated. After a hollow cathode discharge in low‐pressure nitrogen gas, a pulsed high voltage of –8 to –20 kV from a 2‐ to 32‐nF capacitor initiated a channel spark discharge in a glass tube with an internal diameter of 8 mm. Using a newly designed experimental apparatus, it was shown that a high‐energy electron beam was produced in the pressure range from 0.4 Pa to 3.1 × 10–3 Pa in the vacuum chamber. Varying the internal diameter at the end of the glass tube between 16.8 mm and 0.1 mm controlled the diameter of the electron beam. Measurements of the energy distribution of the electron beam revealed that the mean electron energy was approximately 12 keV at the charging voltage of the 20‐kV capacitor. The optimum power density of 1.4 × 108 W/cm2 was obtained by using a glass tube with an internal diameter of 2.7 mm at the end at a pressure of 0.4 Pa. © 2001 Scripta Technica, Electr Eng Jpn, 134(4): 10–18, 2001

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Section: Nitrogen Gas Pressure Dependence Of Electron Beam Generationmentioning

confidence: 99%

Production of a pulsed high-density electron beam by channel spark discharge

Nakagawa

Kawauchi

2001

Elect. Eng. Jpn.

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“…Compared to [ 1,5]. by optimizing the PCOHC geometry and minimizing the inductance of the electrical circuit, the beam peak current and current rise were strongly increased (intensity three times increased), for similar voltages and gas pressure.…”

Section: Discussionmentioning

confidence: 95%

“…The thickness of the anode is of I O mm. Compared to [ 1,2,5] both discharge geometries were improved to increase the beam intensity. The working gas was air and the typical gas pressure, measured at the drift chamber level.…”

Section: Introductionmentioning

confidence: 96%

“…In both configurations the main beam pulses (of approximaiely 300A) are followed by a smooth decreasing "tail", having early values of about 50 A. When a low resistance Faraday cup (0.06 a) is used the beam pulses are similar, but the decreasing "tails", consisting of low energy electrons [5], have early values of about 150 A. As it can be observed, for similar breakdown voltages, the beam peak currents are similar for both configurations.…”

Section: Introductionmentioning

confidence: 96%

“…The generated electron beams tumed out to have a very good spatial stability and reproducibility in peak current (better than 30% for the pseudospark configuration and 15 % for the PCOHC). Similar to pseudospark, some parameters of the extracted electron beams such as intensity were as well improved by using a multielectrode device [ 5 ] . Fig.…”

Section: Introductionmentioning

confidence: 99%

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Pulsed intense electron beams produced in high voltage hollow cathode discharges

Dewald

Frank²,

Schlaug³

et al.

Proceedings ISDEIV. 18th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No.98CH36073)

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Intense pulsed electron beams with remarkable parameters can be produced in high voltage, low pressure hollow-cathode glow discharges. A comparison of the electron beams produced in pseudospark and preionization controlled open ended hollow cathode (PCOHC), both in multigap geometry, is made. The same investigation methods are used: fast shutter photography on the beam induced plasma in the drift space and electrical measurements. The dependency of electron beam parameters on extemal capacity, gas pressure and breakdown voltage is discussed.

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