| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8039064 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2018 | 8 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Y. Martinez Palenzuela, B.A. Marsh, J. Ballof, R. Catherall, K. Chrysalidis, T.E. Cocolios, B. Crepieux, T. Day Goodacre, V.N. Fedosseev, M.H. Huyse, P.B. Larmonier, J.P. Ramos, S. Rothe, J.D.A. Smith, T. Stora, P. Van Duppen, S. Wilkins,