Low-energy dc ion source for low operating pressure

Journal Article · Fri Aug 15 04:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4891697· OSTI ID:22314656

Oks, Efim ^[1]; Shandrikov, Maxim ^[1]; Salvadori, Cecilia ^[2]; Brown, Ian ^[3]

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1. Institute of High Current Electronics, Russian Academy of Sciences, Akademichesky ave. 2/3, Tomsk 634055 (Russian Federation)
2. Institute of Physics, University of São Paulo, C.P. 66318, CEP 05315-970 São Paulo S.P. (Brazil)
3. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720 (United States)

We report on an experimental study of an ion source based on a Penning discharge with a cold hollow cathode in crossed electric and magnetic fields. The minimum vacuum chamber operating pressure was 3 × 10{sup −5} Torr for argon and 5 × 10{sup −5} Torr for hydrogen. The use of a hollow cathode allowed decreasing the discharge operating voltage down to 350 V at a discharge current of ∼100 mA. At a discharge current of 100 mA and beam accelerating voltage of 2 kV, the ion current was 2.5 mA for argon and 8 mA for hydrogen, and the ion beam on-axis current density 170 and 450 μA/cm{sup 2}, respectively. The current-voltage characteristics of the discharge and the radial ion beam current density distribution were measured. The influence of pressure on the discharge parameters and their time stability was investigated.

• OSTI ID: 22314656
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 8 Vol. 85; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ARGON
BEAM CURRENTS
CURRENT DENSITY
ELECTRIC FIELDS
ELECTRIC POTENTIAL
HOLLOW CATHODES
HYDROGEN
ION BEAMS
ION SOURCES
MAGNETIC FIELDS
PENNING DISCHARGES