Author: Allegra, L.
Paper Title Page
MOP013 Mechanical Modifications of the Median Plane for the Superconducting Cyclotron Upgrade 51
 
  • G. Gallo, L. Allegra, L. Calabretta, A.C. Caruso, G. Costa, E. Messina, M.S. Musumeci, D. Rifuggiato, E. Zappalà
    INFN/LNS, Catania, Italy
 
  The Superconducting Cyclotron (CS) is a three sectors, compact accelerator with a wide operating diagram, capable of accelerating heavy ions with q/A from 0.1 to 0.5 up to energies from 2 to 100 MeV/u. Recently a significant upgrade has been proposed to increase the light ion beam intensity by means of extraction by stripping. For the implementation of the new extraction mode, many relevant modifications are needed in the median plane. The biggest upgrade action is the replacement of the present superconducting magnet with a new one, compatible with the beam trajectory and envelope in the extraction by stripping. The extraction by stripping mode implies the installation of two stripper systems, one in a hill and the other in a valley, that allow to extract all the ions requested by the users. Finally, since the present electrostatic extraction mode will be maintained, several relevant mechanical issues have to be faced when switching from one extraction mode to the other one, the location of one electrostatic deflector being the same as the stripper system. The focus of this paper will be the presentation of the different mechanical features involved in the upgrade.  
poster icon Poster MOP013 [1.583 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP013  
About • paper received ※ 12 September 2019       paper accepted ※ 24 September 2019       issue date ※ 20 June 2020  
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MOP014 3D Magnetic Optimization of the New Extraction Channel for the LNS Superconducting Cyclotron 54
 
  • L. Neri, L. Allegra, L. Calabretta, G. Costa, G. D’Agostino, G. Gallo, D. Rifuggiato, A.D. Russo, G. Torrisi
    INFN/LNS, Catania, Italy
 
  The upgrade of the Superconducting Cyclotron operating at INFN-LNS is the main objective of the general upgrade of the LNS facility, consisting in the enhancement of light ion beam intensity. To overcome the present maximum power of 100 W of the beam extracted by electrostatic deflector and achieve a beam power as high as 10 kW, the implementation of the extraction by stripping method has been proposed. Intense ion beams with mass in the range 10 to 40 amu (12C, 18O, 20Ne, 40Ar) in the energy range of interest (15-70 MeV/u) will be delivered to the NUMEN experiment, as well as used for production of in-flight radioactive beams. The present work consists in the optimization of the magnetic channels needed to limit the radial and axial beam envelopes. The design of the magnetic channels has been accomplished by fully three-dimensional magneto-static simulations using Comsol Multiphysics and a custom transport code developed in Matlab along the last year at INFN-LNS. The effect of a magnetic shielding structure in the extraction channel is presented, together with the possibility of producing a magnetic gradient from an asymmetric coil.  
poster icon Poster MOP014 [2.968 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP014  
About • paper received ※ 15 September 2019       paper accepted ※ 24 September 2019       issue date ※ 20 June 2020  
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FRB03 3D Radio Frequency Simulation of the INFN-LNS Superconducting Cyclotron 361
 
  • G. Torrisi, L. Allegra, L. Calabretta, A.C. Caruso, G. Costa, G. Gallo, A. Longhitano, L. Neri, D. Rifuggiato
    INFN/LNS, Catania, Italy
 
  An upgrade plan of the Superconducting Cyclotron operating at INFN-LNS is ongoing. In this paper, a 3D numerical model of the Cyclotron radio frequency cavity is presented. Simulations include the coaxial sliding shorts, liner vacuum chamber, coupler, trimming capacitor and the Dees structures. CST microwave studio software has been used for numerical computation. RF simulations are mandatory also in order to analyze the field in the beam region and evaluate the impact of different Dees geometry and eventual field asymmetries. Moreover, 3D COMSOL Multiphysics simulations have been carried out in order to couple the electromagnetic field solution to a custom beam-dynamics code developed in Matlab as a future plan. Time evolution of accelerated beam and electromagnetic field make also possible to verify the magnetic field synchronization. Experimental validation of the developed model will be also presented.  
slides icon Slides FRB03 [19.931 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-FRB03  
About • paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)