Explosive emission properties of cathode materials in relativistic electron beam generation

Romesh Chandra, Amitava Roy, Senthil Kalyanasundaram, Ankur S. Patel, Vishnu Kumar Sharma, Rakhee Menon, Naresh Pasula, Ranjeet Kumar, Iger Ventizenko, Alexander Mashchenko, Tanmay Kolge, Somesh Vinayak Tewari, Ritu Agarwal, Archana Sharma, Kailash Chandra Mittal

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Relativistic electron beam generation studies have been carried out in LIA-400 system through explosive electron emission for various cathode materials. This paper presents the emission properties of different cathode materials at peak diode voltages varying from 10 to 220 kV and at peak current levels from 0.5 to 2.2 kA in a single pulse duration of 160-180 ns. The cathode materials used are graphite, stainless steel, and red polymer velvet. The perveance data calculated from experimental waveforms are compared with 1-D Child Langmuir formula to obtain the cathode plasma expansion velocity for various cathode materials. Various diode parameters are subject to shot to shot variation analysis. Velvet cathode proves to be the best electron emitter because of its lower plasma expansion velocity and least shot to shot variability.

Original languageEnglish
Article number6902813
Pages (from-to)3491-3497
Number of pages7
JournalIEEE Transactions on Plasma Science
Issue number11
Publication statusPublished - 1 Nov 2014


  • Electron beam applications
  • electron beams
  • electron emission
  • electron sources
  • plasma devices
  • pulse power systems

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear and High Energy Physics

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