A spiral self-magnetically insulated ion diode

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The paper presets the results of a study on a self-magnetically insulated ion diode with an explosive-emission potential electrode. The experiments have been carried out using the TEMP-4M accelerator, operating in a double-pulse mode: the first negative pulse (300-500 ns, 100-150 kV) followed by the second positive pulse (150 ns, 250-300 kV). The ion beam energy density was 0.3-2.5 J/cm2; the beam was composed from carbon ions (80-85%) and protons. We studied several geometries of the diode: planar and focusing strip arrangement, annular and spiral geometries. It was shown that during the second voltage pulse, a condition of magnetic insulation in the diode gap is fulfilled (B/B cr ≥3). Using the new spiral geometry of the diode, it was possible to increase the efficiency of ion current generation due to the suppression of the electron component of the total diode current by increasing the electron transit time in the gap. We have increased the efficiency of carbon ion generation from 5-9% (in the planar strip diodes) up to 17-20% in the spiral diode. The spiral geometry of the diode makes it possible to increase the efficiency of C + ion generation 25-30 times compared to the space-charge-limited current (Childe-Langmuir limit). This is more than two times higher than in other known geometries of self-magnetically insulated diodes. The spiral diode has a resource of more than 107 pulses.

Original languageEnglish
Pages (from-to)427-433
Number of pages7
JournalLaser and Particle Beams
Volume30
Issue number3
DOIs
Publication statusPublished - Sep 2012

Fingerprint

Diodes
diodes
Ions
ions
Geometry
geometry
pulses
strip
Carbon
Electrons
carbon
transit time
Electric space charge
insulation
Ion beams
ion currents
Particle accelerators
Insulation
space charge
resources

Keywords

  • Accelerator
  • Intense ion beams
  • Self-magnetically insulated diode

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

A spiral self-magnetically insulated ion diode. / Pushkarev, A. I.; Isakova, Yu I.

In: Laser and Particle Beams, Vol. 30, No. 3, 09.2012, p. 427-433.

Research output: Contribution to journalArticle

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