Enhancing the extraction of laser-ionized beams from an arc discharge ion source volume

6533b82ffe1ef96bd1295336

RESEARCH PRODUCT

Enhancing the extraction of laser-ionized beams from an arc discharge ion source volume

Shane Wilkins B. A. Marsh Sebastian Rothe P. Van Duppen Thomas Elias Cocolios Thierry Stora K. Chrysalidis K. Chrysalidis V. N. Fedosseev Mark Huyse B. Crepieux J.p. Ramos Richard Catherall Y. Martinez Palenzuela Y. Martinez Palenzuela J. Ballof J. Ballof T. Day Goodacre T. Day Goodacre T. Day Goodacre P. Larmonier J.d.a. Smith

subject

Nuclear and High Energy Physics Materials science Ion beam chemistry.chemical_element 7. Clean energy 01 natural sciences law.invention Ion Electric arc law Ionization 0103 physical sciences Gallium Detectors and Experimental Techniques Arc discharge ionization 010306 general physics Instrumentation Resonance laser ionization 010308 nuclear & particles physics business.industry Laser Ion source Ion source Particle-in-cell simulation chemistry Optoelectronics Physics::Accelerator Physics Radioactive ion beam business Beam (structure)

description

© 2018 The Author(s) The Versatile Arc Discharge and Laser Ion Source (VADLIS) is a recently established ion source for the CERN-ISOLDE radioactive ion beam facility. It offers either electron-impact ionization (VADIS-mode) or resonance laser ionization (RILIS-mode). The choice of operating mode depends on the element of interest or the required beam purity. Particle-in-cell simulations using the VSim software show that the ion extraction efficiency of the VADLIS in RILIS-mode can be improved if it is equipped with an insulated extractor plate, to which an optimal voltage can be applied. This enables optimization of the RILIS-mode ion extraction independently of the electron density. Experiments have been performed using a prototype VADLIS with an adjustable extractor plate voltage for the generation of gallium ion beams at the off-line separator as well as magnesium, molybdenum and mercury ion beams at ISOLDE. A factor >2 increase of the VADLIS efficiency in RILIS-mode has been achieved. ispartof: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS vol:431 pages:59-66 status: published

year	journal	country	edition	language
2018-01-01	Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

10.1016/j.nimb.2018.06.006 http://dx.doi.org/10.1016/j.nimb.2018.06.006