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Diagnosis and dynamics of low energy electron beams using DIADYN

S. MARGHITU1,* , C. OPROIU2, D. TOADER2, C. RUSET2, E. GRIGORE2, O. MARGHITU3, M. VASILIU4

Affiliation

  1. ICPE Electrostatica, Bucharest, Romania
  2. National Institute for Lasers Plasma and Radiation Physics, Bucharest, Romania
  3. Institute for Space Sciences, Bucharest, Romania
  4. POLITEHNICA University of Bucharest, Bucharest, Romania

Abstract

The paper presents original results concerning electron beam diagnosis and dynamics using DIADYN, a low energy (10–50 kV), medium intensity (0.1–1 A) laboratory equipment. A key stage in the operation of DIADYN is the beam diagnosis, performed by the non-destructive, modified three-gradient method (MTGM). We concentrate on the better use of experimental and computational techniques, in order to improve the consistency of the results. At present, DIADYN is equipped with a hot filament vacuum electron source (VES), consisting of a convergent Pierce diode, working in a pulse mode. Since the plasma electron sources (PES) have a longer lifetime and produce higher beam currents, we discuss the possibility to replace the VES with a PES. Special attention is given to VES results in a functioning regime typical for a low energy glow discharge PES..

Keywords

Emittance, Space-charge, Beam diganosis, Beam dynamics, Gas discharge plasma sources.

Submitted at: March 1, 2008
Accepted at: July 10, 2008

Citation

S. MARGHITU, C. OPROIU, D. TOADER, C. RUSET, E. GRIGORE, O. MARGHITU, M. VASILIU, Diagnosis and dynamics of low energy electron beams using DIADYN, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 8, pp. 1984-1987 (2008)