Study of a Compact HPM System With a Reflex Triode and a Marx Generator

Appelgren, P.; Akyuz, Mose; Elfsberg, Mattias; Hurtig, Tomas; Larsson, Anders; Nyholm, S.E.; Moller, Cecilia

doi:10.1109/tps.2006.881889

Cited by 19 publications

(6 citation statements)

References 6 publications

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“…High-current electron beams produced by high-voltage (HV) pulse generators have been widely used in diverse applications such as high-power microwave (HPM) generation [1], highenergy laser pumping [2], x-ray production [3] and surface modification [4]. In the case of HPM generation, electron beams of the kA cm −2 level are required [5,6]. The electron beams are generated from a cold cathode by a process of explosive electron emission [7].…”

Section: Introductionmentioning

confidence: 99%

An intense-current electron beam source with low-level plasma formation

Li¹,

Liu²,

Wen³

et al. 2008

J. Phys. D: Appl. Phys.

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The generation of high-current electron beams is accompanied by strong plasma formation on the cathode surface. The cathode plasma sheath expands towards the anode, which limits the pulse length. In this paper the experiments were performed using a high-voltage pulse generator with 400 kV output voltage and 300 ns pulse duration. We used electrical and optical diagnostics to study the process of plasma formation. This paper presents data on a caesium–iodide (CsI) coated carbon fibre cathode capable of operating with the lack of strong plasma formation. The addition of CsI caused an increase in the voltage pulse duration and reduced the turn-on electric field for electron emission, thus resulting in the fast-rise current. In particular, the CsI coating effectively inhibited the plasma expansion and, as a result, the diode gap remained almost unchanged within approximately 200 ns. These results show that CsI-coated carbon fibre cathodes are promising electron emitters for generating long pulse high-current electron beams.

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Section: Introductionmentioning

confidence: 99%

An intense-current electron beam source with low-level plasma formation

Li¹,

Liu²,

Wen³

et al. 2008

J. Phys. D: Appl. Phys.

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“…In the most basic version of the vircator, the operating frequency depends only on the distance between the anode and cathode and the applied voltage. FOI has designed and built several different vircators with an output power between a few megawatts up to hundreds of megawatts [15]- [18]. The vircator that is being modified for use in HPMtesting is a so called coaxial vircator that will generate a TE 11 mode in a cylindrical waveguide connected to a medium gain horn antenna [17].…”

Section: Desrciption Of Hpm-generatormentioning

confidence: 99%

Methodology and equipment for destructive high-power microwave testing

Hurtig

Akyuz

Elfsberg

et al. 2014

2014 International Symposium on Electromagnetic Compatibility

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FOI is establishing a facility for destructive HPM testing and is developing an envisaged test methodology for such tests. The methodology consists of two test phases: (1) Determine the lowest power density required to destroy an object within a frequency range, using a reverberation chamber. (2) At this frequency, determine the most sensitive direction of attack using an HPM generator. A reverberating chamber and an HPMgenerator adequate for such tests are presented.

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“…High power microwaves can be used to neutralize electronic equipment and systems with a wave that is concentrated in space and time and that has the greatest possible output power. Therefore, a high power microwave source requires a high-voltage, high-current pulse-power generator such as a Marx system, which has a typical pulse duration of $100 ns [1,2]. To characterize this kind of pulse-power generator, one needs a matched load that has sufficiently broad bandwidth and that can withstand high voltage (several hundred kV) and can handle large current (kA).…”

Section: Introductionmentioning

confidence: 99%

Coaxial-type water load for measuring high voltage, high current and short pulse of a compact Marx system for a high power microwave source

Han

Kim

Park

et al. 2009

Phys. Rev. ST Accel. Beams

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A coaxial-type water load was used to measure the voltage output from a Marx generator for a high power microwave source. This output had a rise time of 20 ns, a pulse duration of a few hundred ns, and an amplitude up to 500 kV. The design of the coaxial water load showed that it is an ideal resistive divider and can also accurately measure a short pulse. Experiments were performed to test the performance of the Marx generator with the calibrated coaxial water load.

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Study of a Compact HPM System With a Reflex Triode and a Marx Generator

Cited by 19 publications

References 6 publications

An intense-current electron beam source with low-level plasma formation

An intense-current electron beam source with low-level plasma formation

Methodology and equipment for destructive high-power microwave testing

Coaxial-type water load for measuring high voltage, high current and short pulse of a compact Marx system for a high power microwave source

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