Published October 5, 1992 | Version v1
Journal article

Emittance growth in negative ion beam formation: Effects due to secondary positive ions on the extraction sheath

  • 1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 378931 (United States)
  • 2. Laboratoire du C. N. R. S., Ecole Polytechnique, 91128 Palaiseau (France)

Description

The experimentally measured dependence upon the acceleration voltage of the negative ion current intercepted on a Faraday Cup is compared to theoretical computations. It is shown that the secondary positive ions generated within the electron suppression electrode and accelerated into the plasma source, have a significant effect on the plasma extraction sheath and presheath potentials and explain the experimental data

Additional details

Publishing Information

Journal Title
AIP Conference Proceedings
Journal Volume
287
Journal Issue
1
Journal Page Range
p. 621-633.
ISSN
0094-243X
CODEN
APCPCS

Conference

Title
Production and neutralization of negative ions and beams.
Dates
9-13 Nov 1992.
Place
Upton, NY (United States).

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
25041129
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Resource subtype / Literary indicator
Conference, Numerical Data
Descriptors DEI
BEAM EXTRACTION; BEAM MONITORING; DESIGN; FARADAY CUPS; ION BEAMS; SECONDARY EMISSION; THEORETICAL DATA
Descriptors DEC
BEAM MONITORS; BEAMS; DATA; EMISSION; INFORMATION; MEASURING INSTRUMENTS; MONITORING; MONITORS; NUMERICAL DATA

Optional Information

Secondary number(s)
CONF-921145--.