High Current, High frequency ECRIS development program for LHC heavy ion beam application

N. Angert, P. Spaedtke
GSI, Planckstrasse 1, D-64291 Darmstadt, Germany

C. Hill, H. Haseroth
PS Division, CERN, CH-1211 Geneva 23, Switzerland

A. Girard, D. Hitz, P. Ludwig, G. Melin,
CEA/Departement de Recherche Fondamentale pour la Matiere Condensee, SI2A
17 Av. des martyrs 38054, Grenoble Cedex9, France

J-L. Bouly, J-F. Bruandet, N. Chauvin, J-C. Curdy, R. Geller, T. Lamy, P. Sole, P. Sortais
J-L. Vieux-Rochaz, Institut des Sciences Nucleaires. UJF-IN2P3-CNRS
Service des Sources d'Ions, 53 Av. des martyrs 38026, Grenoble Cedex, France

G. Ciavola, S. Gammino, L. Celona,
INFN - Laboratori Nazionali del Sud, Via Sofia 44, 95123 Catania, Italy

A research program with the aim of producing pulsed currents with hitherto unequalled intensity of Pb27+, with length and repetition rate compatible with those desired by CERN (1 mAe / 400 ms / 10 Hz in the context of future heavy ion collisions at LHC) is organised in a collaboration between CERN/GSI/CEA-Grenoble and IN2P3-ISNG.

Two main experimental programs will be carried out : (i) tests with the LNS-Catania team on the SERSE superconducting source with a 28 GHz gyrotron, (ii) tests on a non-superconducting source (new source at Grenoble) with a 28 GHz gyrotron. For this purpose CEA/DRFMC has borrowed from CEA a 28 GHz - 10 kW gyrotron transmitter.

The project includes also the construction of a source body, by ISNG, with conventional coils and permanent magnets for working at the frequency of about 28 GHz and biased up to 60 kV. This source called PHOENIX will run on a test bench at ISN. PHOENIX is an improvement of the present ECR4-14.5 GHz/CERN source, having a mirror ratio R=2 at 14.5 GHz, and R=1.7 at 28 GHz (possibly reaching 2.1 T on the axis of the source), and with a plasma volume up to 2.5 larger.

Experiments at 28 GHz will be performed on the SERSE source in Catania at INFN/LNS where both the axial and the hexapolar fields will be varied so that the mirror ratio is continuously varied up to R=1.6 ; the SERSE source will be also operated at lower magnetic fields such as those which can be produced by conventional magnets (less than 2 T axial field at injection - far from the 28 GHz High-B mode).

Presenting Author : Hitz D., Sortais P.
Presentation : Oral
Thursday 11:30