Author: Bontoiu, C.     [Bonțoiu, C.]
Paper Title Page
MOPME059 Design of a Multi-harmonic Buncher for LINCE 508
 
  • J. Labrador, C. Bonțoiu, J.A. Dueñas, I. Martel
    University of Huelva, Huelva, Spain
  • M.A. Carrera, A. Garbayo
    AVS, Eibar, Gipuzkoa, Spain
  • A.C.C. Villari
    FRIB, East Lansing, Michigan, USA
  
  Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA.
Continuous beams delivered by the LINCE ECR ion source will be bunched by a multi-harmonic buncher consisting of two copper-made electrodes. Its numerical design is reported here along with electric and magnetic field maps. Multi-frequency operation is proven by tracking a continuous beam and optimizing the its longitudinal phase space bunching for various ion species under the influence of space charge effects. A thermo-mechanical study carried out in order to estimate the needed water flow through the electrodes is presented as well. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME059  
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MOPRI013 Development of a 14.5 – 18 GHz ECR Ion Source at University of Huelva 607
 
  • I. Martel, C. Bonțoiu, A.C.C. Villari
    University of Huelva, Huelva, Spain
  • A. Garbayo
    AVS, Elgoibar, Spain
  • A.C.C. Villari
    FRIB, East Lansing, Michigan, USA
  
  Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA.
A double-frequency ECR ion source has been modelled numerically for high-efficiency ion production from protons to uranium. The simulations were targeted at optimizing magnetic confinement of the hot electrons through an iterative design of three solenoids and a dodecapole. In addition a plasma production model has been implemented in order to study ion species yield from neutral gases and their drift towards the cold plasma regions. Eventually, ion extraction and beam capture in the space-charge regime have been performed. Mechanical design studies approached the plasma chamber cooling and magnet coils refrigeration. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI013  
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THPME032 Beam Transfer Studies for LINCE Experimental Areas 3292
 
  • L. Acosta, C. Bonțoiu, I. Martel, A.R. Pinto Gómez, A.C.C. Villari
    University of Huelva, Huelva, Spain
  • J. Lucas
    Elytt Energy, Madrid, Spain
  • A.C.C. Villari
    FRIB, East Lansing, Michigan, USA
  
  Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA.
Beam transport from the exit of the LINCE linac to experimental areas has been optimized for a few ion species using transfer matrix calculations performed in MADX. An alpha spectrometer based on a double-bending achromat lattice has been used as dispersion suppressor and particle tracking studies have been carried out in GPT along it and the three beamlines. Realistic quadrupole and dipole magnet design achieved in Comsol enabled accurate particle tracking studies and evaluation of the beam parameters delivered at the target. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME032  
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THPME033 Particle Tracking Studies for the LINCE SC Linac 3295
 
  • C. Bonțoiu, I. Martel
    University of Huelva, Huelva, Spain
  • A. Falone
    TTI, Santander, Spain
  • C. Gómez
    IDOM, Bilbao, Spain
  
  Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA.
LINCE facility makes use of a low-energy ion linac consisting of quarter-wave resonators designed for β = 0.045, 0.077 and 0.15 (72.75 and 109.125 MHz), and shielded solenoid magnets distributed along four different cryomodules. Particle tracking studies have been performed along the linac using realistic electric and magnetic field maps with and without space charge effects to prove a final energy of 8.5 and 45 MeV/u respectively for uranium ions and protons. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME033  
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THPME037 Development of a 72.75 MHz RFQ for the LINCE Accelerator Complex 3304
SUSPSNE039   use link to see paper's listing under its alternate paper code  
 
  • A.K. Orduz, C. Bonțoiu, I. Martel, A.C.C. Villari
    University of Huelva, Huelva, Spain
  • A. Garbayo
    AVS, Elgoibar, Spain
  • P.N. Ostroumov
    ANL, Argonne, Illinois, USA
  • A.C.C. Villari
    FRIB, East Lansing, Michigan, USA
  
  Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA.
Low-energy acceleration for the LINCE project [1] will be achieved using a 72.75 MHz normal conducting four vanes RFQ designed to give a 460 keV/u boost for A/Q = 7 ions in about 5 m. The vanes are modeled to accommodate windows for a clear separation of the RFQ modes and easy fitting to an octagonal resonance chamber. This article presents the main numerical results of the radio-frequency modeling and computational fluid dynamics (CFD). Particle tracking studies optimized for bunching and acceleration are shown as well.
[1] I. Martel et al., “LINCE: A High Intensity Multi-ion Superconducting Linac for Nuclear Structure and Reactions”, IPAC’14, Dresden, Germany, June 2014, THPME036, These Proceedings. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME037  
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