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CONSTRUCTION OF A VARIABLE ENERGY POST-ACCELERATOR PROTOTYPE (RADIO FREQUENCY QUADRUPOLE-RFQ-TYPE) FOR CLUSTER BEAMS

Objective


A prototype variable energy radio frequency quadropole (VERFQ) postaccelerator cluster beam with an enhancement factor of 10 has been developed. 3 types of projectiles have been accelerated; N2(+), because the beam is very easy to obtain from the injector without cooling the source with expensive liquid nitrogen and helium and H2 ion and H3 ion which are delivered by the cryogenic source of hydrogen clusters. Any Hn ion can be postaccelerated.

High energy hydrogen cluster beams have been accelerated for the first time. Since the postaccelerated beams have been measured and identified in the experimental setup designed for a fragmentation experiment, the beams delivered by the injector and postaccelerated by the prototype of VE-RFQ are suitable for physics experiments with the first high energy hydrogen clusters of masses less than 50.
From the IPN Lyon-IFK Karlsruhe and IAP Frankfurt collaboration the realization of a Prototype of Variable Energy Radio Frequency Quadrupole (VE-RFQ) is proposed. This machine will post-accelerate from 10 to 100 Ke V/u the mass separated hydrogen clusters, up to mass 50 delivered by a cryogenic source installed on the 1 MV electrostatic accelerator of the IPN-LYON (IPNL, IFK and CERN collaboration). This project is an important step towards the development of a new generation of VE-RFQs associating low cost and small size (due to technological choices), two features of importance for both public and private research laboratories. The upgraded machine (5MeV), a unique facility in the world, opens new perspectives in fundamental and applied research as regards ion-matter interaction and the unknown structure of these exotic projectiles, as well as in material modifications by cluster bombardment. These last investigations could strongly affect the electronics and computer market and the metallurgy industry.

Coordinator

Centre National de la Recherche Scientifique (CNRS)
Address
43 Boulevard Du 11 Novembre 1918
69622 Villeurbanne
France

Participants (2)

Forschungszentrum Karlsruhe Technik und Umwelt GmbH
Germany
Address

76021 Karlsruhe
JOHANN WOLFGANG GOETHE UNIVERSITAET FRANKFURT
Germany
Address
Seckenberg Anlage 31
60054 Frankfurt Am-main