Keyword: ECR
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MOPWA048 Transverse Emittance Measurement for Low Energy Ion Beams Using Quadrupole Scan Method ion, emittance, plasma, ion-source 226
 
  • S. Kumar, A. Mandal
    IUAC, New Delhi, India
 
  Low energy ion beam facility (LEIBF) * at IUAC consists of all permanent magnet 10 Ghz electron cyclotron resonance (ECR) ion source (NANOGUN) ** along with 400 kV high voltage accelerating platform, a switching cum analysing magnet and electrostatic quadrupoles. Higher beam currents of heavy charge states and low energy of ion beams puts tremendous challenge to transport the ion beam from source to target. The normalized emittance of analysed ion beam is measured for specific charge to mass ratio using electrostatic quadrupole scan method *** for various source parameters like RF power and injection pressure of gas etc. For various m/q ratios, the normalized transverse emittance ranges from 0.1 to 0.6 mm-mrad. It is attributed to beam rotation induced by ECR axial magnetic field, effect of ion temperature in plasma, non linear electric fields and space charge etc which play a significant role in emittance growth.
* A. Mandal et. al. Proceedings of IPAC2011, WEPC011, San Sebastián, Spain
** D Kanjilal et. al. Indian J. Pure Appl. Phys. 39 (2001) 25
*** I. G. Brown:The physics and technology of ion sources
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA048  
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TUPTY078 Fixed-energy Cooling and Stacking for an Electron Ion Collider electron, ion, space-charge, collider 2214
 
  • P.M. McIntyre, S. Assadi, J. Gerity, A. Sattarov
    Texas A&M University, College Station, Texas, USA
 
  The proposed designs for polarized-beam electron-ion colliders require cooling of the ion beam to achieve and sustain high luminosity. One attractive approach is to make a fixed-energy storage ring in which ions are con-tinuously cooled and stacked during a collider store, then transferred to the collider and accelerated for a new store when the luminosity decreases. An example design is reported for a 6 GeV/u superferric storage ring, and for a d.c. electron cooling system in which electron space charge is fully neutralized so that high-current magnetized e-cooling can be used to best advantage.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPTY078  
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THPF073 Progress of the RAON Heavy Ion Accelerator Project ion, cryomodule, rfq, ion-source 3848
 
  • D. Jeon
    IBS, Daejeon, Republic of Korea
 
  Construction of the RAON heavy ion accelerator facility is under way in Korea that includes both the In-flight Fragment (IF) and Isotope Separation On-Line (ISOL) facilities to support cutting-edge researches in various science fields. Prototyping and testing of major components are proceeding including 28 GHz ECR ion source, RFQ, superconducting cavities, cryomodules, superconducting magnets. Superconducting magnets of 28 GHz ECR ion source are fabricated and tested. First article of prototype superconducting cavities are delivered that were fabricated through domestic vendors and tested at TRIUMF. Prototype HTS(High Tc Superconducting) magnets is in progress. Progress report of the RAON accelerator systems is presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF073  
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THPF141 Design of a Compact All-Permanent Magnet ECR Ion Source Injector for ReA at MSU NSCL ion, ion-source, injection, extraction 4054
 
  • A.N. Pham, P. Glennon, A. Lajoie, D. Lawton, D. Leitner, G. Machicoane, J. Ottarson, M. Portillo, J. Wenstrom
    NSCL, East Lansing, Michigan, USA
 
  Funding: Work supported by Michigan State University and the National Science Foundation Grant PHYS-1102511.
The design of a compact all-permanent magnet electron cyclotron resonance (ECR) ion source injector for the ReAccelerator Facility (ReA) at the Michigan State University (MSU) National Superconducting Cyclotron Laboratory (NSCL) is currently being carried out. The ECR ion source injector will augment the electron beam ion trap (EBIT) charge breeder as an off-line stable ion beam injector for the ReA linac. The objective of the ECR ion source injector will be to provide CW beams of heavy ions from hydrogen to masses up to 136Xe within the ReA charge-to-mass ratio (Q/A) operational range from 0.2 to 0.5. The ECR ion source will be mounted on a high-voltage platform that can be adjusted to provide the required 12 keV/u injection energy into a room temperature radio-frequency quadrupole (RFQ) for further acceleration. The beam line consists of a 30 kV tetrode extraction system, mass analyzing section, and optical matching section for injection into the existing ReA Low Energy Beam Transport (LEBT) line. The design of the ECR ion source and the associated beam line are discussed.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF141  
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