Abstracts Brochure - CERN

TUPLS — Poster Session 27-Jun-06 16:00 - 18:00
Improved Cusp Magnetic Field for Electron Cyclotron Resonance Ion Source
The electron cyclotron resonance (ECR) ion
sources using rotationally symmetric cusp M.H. Rashid, R.K. Bhandari (DAE/VECC)
magnetic field (CMF) are not successful till
now because of loose confinement and loss of plasma at the line cusp. Some theoretical work has been done to
identify and mitigate the problems involved in it. An appropriate high-B spindle CMF is generated using either a
single powerful permanent magnet ring or a pair of oppositely energized coaxial solenoids. The axial-radial mirror
field is generated which is essential for confinement of electrons for longer time thereby increasing the confinement
of ions. The gas-dynamic confinement of plasma also plays an important role. The density of plasma as well as the
charge state of ions are enhanced because of reduction in plasma loss. This configuration of the improved CMF can
be used to design electron cyclotron resonance plasma /ion device using higher rf frequencies also. The ion source
using coils only can be used to produce intense radioactive ion beams by putting it just near the target of production
of radioactive species. Some conceptual design of improved CMF for ECR ion source and electron simulation in it
will be presented.
Implementations and Test Measurements on the RF Charge Breeder Device BRIC
The Radioactive Ion Beam (RIB) production
with ISOL technique should require a charge
breeder device to increase the ion acceleration
efficiency and reduce greatly the production
cost. The "charge state breeder"
V. Variale, A. Boggia, T. Clauser, A.C. Rainò, V. Valentino (INFN-
Bari) P.A. Bak, M. A. Batazova, G.I. Kuznetsov, S. Shiyankov, B.A.
Skarbo (BINP SB RAS)
BRIC (BReeding Ion Charge) is based on an EBIS source and it is designed to accept RIB with charge state +1
and increase their charge state up to +n. BRIC has been developed at the INFN section of Bari (Italy) during these last
3 years with very limited funds and it has been assembled at the LNL (Italy) laboratory. BRIC could be considered
as a solution for the charge state breeder of the SPES project under study also at the LNL. The new feature of BRIC,
with respect to the classical EBIS, is given by the insertion, in the ion drift chamber, of a Radio Frequency (RF) -
Quadrupole aiming to filtering the unwanted masses and then making a more efficient containment of the wanted
ions. The RF test measurements seem confirm, as foreseen by simulation results* that a selective containment can be
obtained. Most accurate measurements, however, are needed and for that implementations of the system have been
carried out.
*V. Variale and M. Claudione. "BRICTEST: a code for charge breeding simulations in RF quadrupolar field", NIM in
Phys. res. A 543 (2005) 403-414.
Ag Acceleration Using DPIS
We are investigating high current and high
repetition rate ion production methods for
various heavy ions which can be utilized for
an injector of an FFAG accelerator. Direct
T. Kanesue (Kyushu University) A. Kondrashev (ITEP) M. Okamura
(RIKEN) K. Sakakibara (RLNR)
Plasma Injection Scheme (DPIS) is one of the candidates of the ion production methods and to confirm the capability
of the DPIS, we are now preparing for accelerating high intensity Ag 15+ ions. The DPIS uses a combination of Laser
Ion Source (LIS) and RFQ linac. The plasma goes into the linac directly without transportation line and the ions
are extracted at RFQ entrance. To determine the specifications of new RFQ electrodes, the plasma properties were
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