Experimental studies of ionization processes in the breakdown phase of a transient hollow cathode discharge

Choi, P.; Aliaga, R.; Blottiere, B.; Favre, M.; Moreno, José; Chuaqui, H.; Wyndham, E.

doi:10.1063/1.110323

Cited by 22 publications

(7 citation statements)

References 9 publications

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“…Afterward, the discharge transfers to the final conductive phase, in which the cold cathode surface facing the anode takes over the whole discharge current with a very high current produced at a low acceleration potential until the gap is shorted. [18][19][20] The upper part of Fig. 3 shows a typical record of the time-correlated PS discharge voltage and beam current.…”

Section: Resultsmentioning

confidence: 99%

Pseudospark-based electron beam and Cherenkov maser experiments

Yin

Robb

et al. 2000

Physics of Plasmas

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Detailed experimental results from the first free-electron maser experiment to use a pseudospark-based electron beam are presented in this paper. These include the design and realization of a pseudospark-based electron beam source and Cherenkov maser experiment. A pulsed, 70-80 kV, 10 A electron beam was obtained from the hollow cathode discharge phase of an 8-gap pseudospark (PS) discharge. The beam was used to produce coherent microwave radiation via a Cherenkov interaction between the electron beam and the TM01 mode of a 60-cm long alumina-lined waveguide. A gain of 29+/-3 dB was measured and an output power of 2+/-0.2 kW in the frequency range 25.5-28.6 GHz. Results from numerical simulations of the Cherenkov amplification are also presented and found to be consistent with the experimental results

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Section: Resultsmentioning

confidence: 99%

Pseudospark-based electron beam and Cherenkov maser experiments

Yin

Robb

et al. 2000

Physics of Plasmas

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“…Simulation has shown that the enhanced electron injection rate leads to the formation of a plasma region in the A-K gap, first near to the anode and then extending to the cathode, creating effectively a moving virtual anode, Manuscript received August 15, 1994;revised March 19, 1995 which brings the applied voltage close to the cathode and enhances the leakage field within the HCR [l]. The existence of this virtual anode was measured experimentally [ 2 ] . The electron extraction into the A-K gap leaves behind in the HCR a region rich in ions.…”

Section: Introductionmentioning

confidence: 99%

Breakdown formation in a transient hollow cathode discharge-a statistical study

Choi

Chuaqui

Favre

et al. 1995

IEEE Trans. Plasma Sci.

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Discharge formation at low pressure is found to be greatly influenced in the presence of a suitable hollow cathode region. The formation of a moving virtual anode which extends the anode potential to within the hollow cathode region is thought to be responsible for the enhanced ionization growth which subsequently leads to gas breakdown. In this paper, the spatial evolution of the local potential in the discharge region of a pulsed hollow cathode discharge has been measured in a range of pressures with two different cathode apertures. An extensive data set has been collected and analyzed using a statistical technique. From the characteristic of the statistical distribution of the data, unique features associated with the role of hollow cathode at the different stages of discharge formation have been identified. It was found that the influence of the hollow cathode region is strongest in the start of ionization growth and in the final change over to high current breakdown.

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“…As the ionization growth continues, a virtual anode is formed, which propagates and extends the anode potential towards the cathode. 9 At the end of this phase, the full anode potential is brought close to the cathode and the electric field inside the HCR region is now significantly enhanced and local ionization is increased. The injection of an intense electron beam from this hollow cathode plasma source into the A-K gap then forms the final breakdown channel.…”

Section: Discussionmentioning

confidence: 98%

Fast pulsed hollow cathode capillary discharge device

Choi

Favre

1998

Review of Scientific Instruments

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A fast pulsed capillary discharge device has been developed and implemented. The device combines the features of a transient hollow cathode discharge with the inherent characteristics of the capillary discharge, to obtain VUV to XUV radiation with ns rise time. The discharge operates in a 0.8 mm inner diameter alumina capillary, at 10–30 kV applied voltage. On axis discharge initiation is assisted by electron beams, which are characteristic of the hollow cathode effect. A short, 5 ns full width at half maximum XUV pulse is produced in association with a ∼1 kA, 5 ns current pulse.

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Experimental studies of ionization processes in the breakdown phase of a transient hollow cathode discharge

Cited by 22 publications

References 9 publications

Pseudospark-based electron beam and Cherenkov maser experiments

Pseudospark-based electron beam and Cherenkov maser experiments

Breakdown formation in a transient hollow cathode discharge-a statistical study

Fast pulsed hollow cathode capillary discharge device

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