Note: Enhanced production of He{sup +} from the Versatile Ion Source (VIS) in off-resonance configuration

Journal Article · Mon Sep 15 00:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4895603· OSTI ID:22314697

Castro, G.; Mascali, D.; Celona, L.; Gammino, S.; Mazzaglia, M.; Neri, L.; Altana, C.; Ciavola, G. ^[1]; Caliri, C. ^[1]; Bartolo, F. Di ^[1]; Lanaia, D. ^[1]; CERN, Geneva ^[2]; Miracoli, R. ^[1]; ESS Bilbao, Bilbao ^[3]; Torrisi, G. ^[1]

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1. INFN-Laboratori Nazionali del Sud, via S. Sofia 62, 95123 Catania (Italy)
2. Switzerland
3. Spain

The Versatile Ion Source (VIS) is a microwave discharge ion source installed at INFN-LNS and here used as test-bench for the production of high intensity low emittance proton beams and for studies on plasma physics. A series of measurements have been carried out with VIS in order to test the source with light ions. In particular a He{sup +} beam has been characterized in terms of plasma discharge parameters. The experiment has been triggered by the observation of X-radiation emission from the plasma for some configuration of the magnetic field profile. The plasma electron energy distribution function is in fact modified when in some regions of the plasma chamber under-resonance discharge takes place, fulfilling the condition that allows the electromagnetic wave to electrostatic wave conversion. These tests allowed obtaining more than 50 mA of He{sup +} beams.

• OSTI ID: 22314697
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DISTRIBUTION FUNCTIONS
ELECTRONS
ENERGY SPECTRA
HELIUM IONS
HIGH-FREQUENCY DISCHARGES
ION SOURCES
LIGHT IONS
MAGNETIC FIELDS
PLASMA WAVES
PROTON BEAMS
X RADIATION