Keyword: radio-frequency
Paper Title Other Keywords Page
MOPPT025 Optimum Serpentine Acceleration in Scaling FFAG acceleration, linac, lattice, extraction 85
 
  • S.R. Koscielniak
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  
  Serpentine acceleration is typified by fixed radio frequency, fixed magnetic field and a near (but not) isochronous lattice, radial motion of the orbit, and two or more reversals of the motion in RF phase. This was discovered in 2003 for linear non-scaling FFAGs in the relativistic regime. In 2013, Kyoto University School of Engineering pointed out that serpentine acceleration is possible also in scaling FFAGs and may span the non-relativistic to relativistic regime. As a function of two key parameters, field index and synchronous energy, this paper shows how to optimize the extraction energy and the voltage per turn for the scaling case. Optimization is difficult, and typically leads to poor performance: either extreme voltage or small acceleration range. Nevertheless, designs with credible acceleration parameters can be obtained; and indicative examples are presented herein.  
 
TUPSH013 Design Study of 10 MeV H− Cyclotron Magnet cyclotron, simulation, magnet-design, extraction 248
 
  • H.S. Kim, J.-S. Chai, M. Ghergherehchi, H.W. Kim, S.H. Kim, S.H. Lee
    SKKU, Suwon, Republic of Korea
  
  Funding: This work has been supported by National Research Foundation of Korea funded by the Ministry of Science, ICT and Future Planning (NRF-2010-0025952).
For the past decades, PET (positron emission tomography) has been remarkable growth in market. PET using 18F is widely provided for cancer screening and expected to be installed at small and medium hospital for convenience of patients. At Sungkyunkwan University, 10 MeV H− cyclotron, which produces 18F is being developed. In this paper, we demonstrated main magnet design and whole design procedure was explained. The result of design is verified by orbit analysis and single particle tracking. The description of the obtained result is presented in this paper. 		 
 
FR1PB03 The Radio Frequency Fragment Separator: A Time-of-Flight Filter for Fast Fragmentation Beams neutron, cyclotron, proton, target 467
 
  • T. Baumann, D. Bazin, T.N. Ginter, E. Kwan, J. Pereira, C. Sumithrarachchi
    NSCL, East Lansing, Michigan, USA
  
  Funding: Supported by the National Science Foundation under Grants PHY02-16783, PHY-06-06007, and PHY-11-02511.
Rare isotope beams produced by fragmentation of fast heavy ion beams are commonly separated using a combination of magnetic rigidity selection (mass to charge ratio) and energy-loss selection (largely dependent on proton number) using magnetic fragment separators. This method offers isotopic selection of the fragment of interest, however, the purity that can be achieved depends on the rigidity of the rare isotope with respect to more abundant fragments. This poses a problem specifically for neutron-deficient isotopes (towards the proton drip line) where much more abundant isotopes closer to stability can not be separated out. A separation by time-of-flight can further suppress such isotonic contaminants. The Radio Frequency Fragment Separator* deflects isotopes based on their phase relative to the cyclotron RF using a transverse electric RF field, effectively separating by time-of-flight. This method is in use for the production of neutron deficient rare isotope beams at NSCL.
*D. Bazin et al., Nucl. Inst. and Meth. A 606 (2009) 314-319 		 
slides icon Slides FR1PB03 [4.324 MB]