Town Meeting, Sept. 19th, 2007, Helsinki 1Giovanni Ciavola

I3 EURONS-2 COMPLECS

INFN - GSI - GANIL - LPSC - JYFL - KVI CERN - ATOMKI- TSL - NIPNE - IKF- IAP

COMPLECSCoupling Of Microwaves to PLasma for

Electron Cyclotron  resonance ion Sources

The core of the JRA consists of the study

and analysis devoted to the search for

innovative methods able to increase the

energy content of the plasma in ECR ion

sources, with the final goal to obtain

intense beams of highly charged heavy ions,

with special regards to metallic elements,

particularly important for the TNA.

Town Meeting, Sept. 19th, 2007, Helsinki 2Giovanni Ciavola

I3 EURONS-2 COMPLECS

Key points

In the last three years, it was understood that a better knowledge of the plasma-wave interaction, of the plasma-wall interaction and of the multi-charged ion beam formation may permit important steps forward.

The ECR-heating has to be studied by taking into account the wave behaviour and the mode structure inside the plasma chamber.

Plasma diagnostics will study the hot electrons loss on the plasma chamber wall to improve the ECRIS physics understanding.

The improvement of ECR ion source performances has been based on the increase of confinement time and plasma density, so high magnetic field trap has been designed and higher frequency has been used.

Town Meeting, Sept. 19th, 2007, Helsinki 3Giovanni Ciavola

I3 EURONS-2 COMPLECS

GSI : ions of (A/q) = 1 to 8.5 are needed, dc mode : Xe20+~ 1 emA; pulsed mode : 6 mA of U28+

GANIL, INFN-LNL: (q/A) = (1/3) 1 emA 36Ar12+ cw mode, krypton beams

CERN : 1 emA Pb27+ pulsed mode

Cyclotrons (INFN-LNS, KVI, JYFL,TSL): heavy ion beams up to U60+ between 0.1 and 5 eµA (cw mode)

ECOS : 0.1 - 1 emA with charge state as high as possible

Requirements

The comprehension of ion formation mechanism will be beneficial for all the existing sources within TNA, in particular for the sources that will produce intense beams of highly charged ions.

Town Meeting, Sept. 19th, 2007, Helsinki 4Giovanni Ciavola

I3 EURONS-2 COMPLECSMethods

The sources already existing (MS-ECRIS, A-PHOENIX, SERSE, and other sources available in the laboratories involved in this project) will be used for these tests.

For some ECRIS a possible extension of operating frequency and the use of broadband amplifiers is under consideration, with the contribution of the associated Inst. Appl. Phys., Nizhny Novgorod.

Special attention has to be paid to the beam formation, in order to ensure that a high quality ion beam is produced, even for high intensities, that will have beneficial effects on the transport.

The theory demonstrated that higher beam intensity can be achieved with lower microwave power, that results also in a higher source reliability and beam availability.

Town Meeting, Sept. 19th, 2007, Helsinki 5Giovanni Ciavola

I3 EURONS-2 COMPLECS

Compact inductive oven may be the ideal tool for any facility.

Innovative methods and new material combinations are strongly

required for all accelerator facilities.

Metal ion beams

Resistively heated oven developed during FP6

Metal ion beams production is not new, but indeed new methods are needed because the state of the art does not permit to satisfy all the requirements of Nuclear Physics experiments

Problems occur for expensive/reactive/high melting point

materials

large dimensions and low reliability at the highest temperature

up to 2000˚C

Town Meeting, Sept. 19th, 2007, Helsinki 6Giovanni Ciavola

I3 EURONS-2 COMPLECSAdditional resources

In particular, different ECR ion sources may be used for the experiments, including MS-ECRIS and A-PHOENIX, built with a contribution of EU under FP6/EURONS.

A relevant number of diagnostics tools are already available at some laboratories and some other may be built in the coming years with own resources of the participating Institutions (beam diagnostics, microwave interferometry, optical diagnostics, etc.).

‘Fresh money’ will be available from INFN, to build an innovative microwave generator, fulfilling the requirements needed, provided that a contribution of the same order would be available from EU.

Additional resources will be made available by the different Institutions.