Keyword: quadrupole
Paper Title Other Keywords Page
MOB02 Design Study of In-flight Fragment Separator for Rare Isotope Science Project in Korea target, shielding, radiation, dipole 20
  • J.-W. Kim
    NCC, Korea, Kyonggi, Republic of Korea
  • D.G. Kim, M. Kim, S.K. Kim, J. Song, C.C. Yun
    IBS, Daejeon, Republic of Korea
  • W. Wan
    LBNL, Berkeley, California, USA
  A heavy-ion accelerator complex is being designed for rare isotope beam production utilizing both in-flight fragmentation and ISOL methods in Korea. The project had been planned with conceptual design efforts, and officially launched in January this year with full funding promised. The driver accelerator is a superconducting linac with a beam power of 400 kW. The uranium beam, which is a primary beam for projectile fragmentation, is to be accelerated to 200 MeV/u. The in-flight fragment separator can be divided into pre and main separators. The target system and beam dump to handle the full beam power are located in the front part of the pre-separator, and are being studied using various codes such as PHITS and ANSYS considering issues especially related to radiation damage and shielding. Beam optics design was performed in the previous conceptual study, and further optimization is under way. The separator will be composed of large aperture superconducting quadrupole magnets and conventional dipole magnets, and prototyping of the superconducting magnet is planned. The status of the design efforts will be presented.  
slides icon Slides MOB02 [2.856 MB]  
PO03 The RIB Dynamics of the SPIRAL 2 Transfer Line ion, solenoid, extraction, emittance 54
  • D. Boutin, F.R. Osswald
    IPHC, Strasbourg Cedex 2, France
  • N.Yu. Kazarinov
    JINR, Dubna, Moscow Region, Russia
  • C. Peaucelle
    IN2P3 IPNL, Villeurbanne, France
  • T. Thuillier
    LPSC, Grenoble, France
  The design of the SPIRAL 2 RIB extraction and mass analysis results of previous experiences at Ganil (SIRa) and SPIRAL* and concerns the ISOL process. The layout presents different beam sections of optical interest starting with a conventional Einzel lens, a 1 T solenoid, a triplet of magnetic quadrupoles and a magnetic dipole for the mass analysis. The down-stream 1+ ions transfer line to the users is designed following a conservative solution composed of emittance limitation, homothetic betatron matching, passive and symmetrical optical lattices (point to point and unitary transport) as well as beam instrumentation enabling the control of the losses (pepperpots, slits, beam profilers, FC, etc.). The presentation will mainly focus on the description of the beam line, its characteristics and on some side effects which have to be taken into account in order to match the beam properly during the operations.
* On Line Isotopic Separator Test Benches at GANIL, R. Anne et al., PAC
proceed. ed. IEEE, 1993
PO14 Feedback of Slow Extraction in CSRm extraction, feedback, synchrotron, emittance 89
  • J. Shi, W.P. Chai, J. Li, J.W. Xia, J.C. Yang, Y.J. Yuan
    IMP, Lanzhou, People's Republic of China
  The transverse tune of the beam in the synchrotron will fluctuate due to the quadrupole current ripple, which lead the spill ripple through the variation of the separatrices area. In order to reduce the ripple of the spill, a pair of fast response quadrupole (FQ) is adopted to compensate the tune ripple caused by other quadrupoles. After using the FQ feedback, the amplitude of the spill ripple within 800Hz has been reduced to 1/10 times from the normal mode. This method will be used in the HITFiL (Heavy Ion Therapy Facility in Lanzhou).