SHE Factory

  • All works on creation of DC-280 cyclotron complex are completed in the FLNR JINR. New cyclotron start-up is planned for November 2018.
    (JINR TV, September 12, 2018)

 

  • Commissioning of DC-280 cyclotron complex (JINR TV, July 12, 2018)
    FLNR JINR DC-280 cyclotron complex. Commissioning of all systems is under way.
    JINR SI Department
     

    Creation of SHE factory based on the high-intensity universal DC-280 cyclotron (A ≤ 238, E ≤ 10 MeV/A, I ≤ 20 pµA) in a new separate experimental building is a part of the DRIBs-III project according to the Seven-Year Plan for the Development of JINR 2010-2016 approved by the Committee of Plenipotentiaries of the Governments of the JINR Member States (CPP) in November 2009.

    The SuperHeavy Element Factory will increase the overall production of super-heavy nuclei by one-two orders of magnitude with respect to presently achieved rates. This will enable the studies of nuclear /atomic structure of heaviest atoms and open the door to the discoveries of new elements above Z=118 and of isotopes closer to the predicted shell closure at N=184.

    SHE Factory Goals

    Experiments at the extremely low (σ<100 fb) cross sections:

     

    • Synthesis of new SHE in reactions with 50Ti, 54Cr …;
    • Synthesis of new isotopes of SHE;
    • Study of decay properties of SHE;
    • Study of excitation functions.

    Experiments requiring high statistics:

    • Nuclear spectroscopy of SHE;
    • Precise mass measurements;
    • Study of chemical properties of SHE.
    • DC280 cyclotron, a stand-alone SHE-factory


     

    • Synthesis and study of properties of superheavy elements;
    • Search for new reactions for SHE-synthesis;
    • Chemistry of new elements;

    DC280 cyclotron main design parameters

        Ion source DECRIS-PM – 14 GHz on the
    HV platform (Umax=60 kV )
        Injection energy
    		 Up to 80 keV/Z
        A/Z range 4÷7.5
        Energy 4÷8 MeV/A
        Ion mass (for DECRIS-PM) 4-136
        Intensities (A~50) >10 ρμA
        Magnetic field level
    		 0.6÷1.3 T
        K factor 280
        Dee voltage 2×130 kV
        RF power consumption 2×30 kW
        Flat-top dee voltage
    		 2×13 kV
        Flat-top power consumption 2×2 kW
        Beam emittance less than 30 π mm•mrad
        Efficiency of beam transfer >50%

     

    • Main setups:
      • Gas-filled recoil separator (DGFRS-II);
      • Preseparator for chemical investigations;
      • Separator for Heavy Element Spectroscopy: velocity filter SHELS;
      • Mass Analyzer of SuperHeavy Atoms (MASHA)
      • Channels reserved for external users
      • SHE Factory Project progress