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Abstracts Brochure - CERN

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TUPLS — Poster Session 27-Jun-06 16:00 - 18:00<br />

Improved Cusp Magnetic Field for Electron Cyclotron Resonance Ion Source<br />

The electron cyclotron resonance (ECR) ion<br />

sources using rotationally symmetric cusp M.H. Rashid, R.K. Bhandari (DAE/VECC)<br />

magnetic field (CMF) are not successful till<br />

now because of loose confinement and loss of plasma at the line cusp. Some theoretical work has been done to<br />

identify and mitigate the problems involved in it. An appropriate high-B spindle CMF is generated using either a<br />

single powerful permanent magnet ring or a pair of oppositely energized coaxial solenoids. The axial-radial mirror<br />

field is generated which is essential for confinement of electrons for longer time thereby increasing the confinement<br />

of ions. The gas-dynamic confinement of plasma also plays an important role. The density of plasma as well as the<br />

charge state of ions are enhanced because of reduction in plasma loss. This configuration of the improved CMF can<br />

be used to design electron cyclotron resonance plasma /ion device using higher rf frequencies also. The ion source<br />

using coils only can be used to produce intense radioactive ion beams by putting it just near the target of production<br />

of radioactive species. Some conceptual design of improved CMF for ECR ion source and electron simulation in it<br />

will be presented.<br />

Implementations and Test Measurements on the RF Charge Breeder Device BRIC<br />

The Radioactive Ion Beam (RIB) production<br />

with ISOL technique should require a charge<br />

breeder device to increase the ion acceleration<br />

efficiency and reduce greatly the production<br />

cost. The "charge state breeder"<br />

V. Variale, A. Boggia, T. Clauser, A.C. Rainò, V. Valentino (INFN-<br />

Bari) P.A. Bak, M. A. Batazova, G.I. Kuznetsov, S. Shiyankov, B.A.<br />

Skarbo (BINP SB RAS)<br />

BRIC (BReeding Ion Charge) is based on an EBIS source and it is designed to accept RIB with charge state +1<br />

and increase their charge state up to +n. BRIC has been developed at the INFN section of Bari (Italy) during these last<br />

3 years with very limited funds and it has been assembled at the LNL (Italy) laboratory. BRIC could be considered<br />

as a solution for the charge state breeder of the SPES project under study also at the LNL. The new feature of BRIC,<br />

with respect to the classical EBIS, is given by the insertion, in the ion drift chamber, of a Radio Frequency (RF) -<br />

Quadrupole aiming to filtering the unwanted masses and then making a more efficient containment of the wanted<br />

ions. The RF test measurements seem confirm, as foreseen by simulation results* that a selective containment can be<br />

obtained. Most accurate measurements, however, are needed and for that implementations of the system have been<br />

carried out.<br />

*V. Variale and M. Claudione. "BRICTEST: a code for charge breeding simulations in RF quadrupolar field", NIM in<br />

Phys. res. A 543 (2005) 403-414.<br />

Ag Acceleration Using DPIS<br />

We are investigating high current and high<br />

repetition rate ion production methods for<br />

various heavy ions which can be utilized for<br />

an injector of an FFAG accelerator. Direct<br />

T. Kanesue (Kyushu University) A. Kondrashev (ITEP) M. Okamura<br />

(RIKEN) K. Sakakibara (RLNR)<br />

Plasma Injection Scheme (DPIS) is one of the candidates of the ion production methods and to confirm the capability<br />

of the DPIS, we are now preparing for accelerating high intensity Ag 15+ ions. The DPIS uses a combination of Laser<br />

Ion Source (LIS) and RFQ linac. The plasma goes into the linac directly without transportation line and the ions<br />

are extracted at RFQ entrance. To determine the specifications of new RFQ electrodes, the plasma properties were<br />

247<br />

TUPLS091<br />

TUPLS092<br />

TUPLS093

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