Author: Kazarinov, N.Yu.
Paper Title Page
WEPS082 Development of FLNR JINR Heavy Ion Accelerator Complex in the Next Seven Years: New DC-280 Cyclotron Project 2700
 
  • G.G. Gulbekyan, S.L. Bogomolov, O.N. Borisov, S.N. Dmitriev, J. Franko, B. Gikal, I.A. Ivanenko, I.V. Kalagin, V.I. Kazacha, N.Yu. Kazarinov, N.F. Osipov, A. Tikhomirov
    JINR, Dubna, Moscow Region, Russia
 
  At present time four isochronous cyclotrons: U-400, U-400M, U-200 and IC-100 are in operation at the JINR FLNR. Total operation time is about 10000 hours per year. The U400M is a primary beam generator and U400 is as postaccelerator in RIB (DRIBs) experiments to produce and accelerate exotic nuclides such as 6He, 8He etc. One of the basic scientific programs which are carried out in FLNR - synthesis of new elements which demands intensive beams of heavy ions. Now U-400 is capable to provide long term experiments on Ca 48 beams with intensity of 1 pμA.In order to improve efficiency of the experiments for the next 7 years it is necessary to obtain the accelerated ion beams with the following parameters. Ion energy 4/8 MeV/n Masses 10/238 Beam intensity (up to A=50) 10 pμA Beam emittance less 30 π mm·mrad These parameters have underlain the project of new cyclotron DC-280.  
 
WEPS083 DC280 Cyclotron Central Region with Independent Flat-Top System 2703
 
  • I.A. Ivanenko, B. Gikal, G.G. Gulbekyan, N.Yu. Kazarinov
    JINR, Dubna, Moscow Region, Russia
 
  At the present time, the activities on creation of the new isochronous cyclotron DC280 are carried out at the FLNR, JINR. The cyclotron DC280 is intended for accelerating the wide range of ion beams with A/Z= 4 - 7 to energy W= 4 - 8MeV/u and intensity up to 10pmcA. To achieve high-intensity ion beams the cyclotron is equipped with Flat-Top system. At the cyclotron DC280 the Flat-Top system is physically separated from main resonators. The investigation of the cyclotron centre region with independent Flat-Top is presented. The simulation of the beams acceleration is carried out by means of the computer code CENTR.  
 
THPS017 Simulation of Hollow Beam Formation at the Initial Part of RIB Transport Channel of SPIRAL2 3457
 
  • N.Yu. Kazarinov
    JINR, Dubna, Moscow Region, Russia
  • F.R. Osswald
    IPHC, Strasbourg Cedex 2, France
 
  The initial part of Radioactive Ion Beam (RIB) transport channel of SPIRAL2 consists of 2.45 GHz ECR Ion Source, focusing solenoid, triplet of quadrupole lenses and 90-degrees analyzing bending magnet. The supporting gas (Nitrogen) current of ECRIS used in RIB production has a value about 1 mA. The influence of the Nitrogen beam self-fields may leads to hollow beam formation in the transported ion species at the part of beam line placed after the focusing solenoid. This effect increases the RIB emittance and therefore complicates the RIB transport. In this report the numerical simulation of hollow beam formation is fulfilled. The threshold current of ECRIS supporting gas which gives a hollow beam formation of transported ions is defined. The influence of the beam neutralization is taking into account. The possible neutralization factor is found from results of simulation of GANIL Test Bench. The simulation of a variant of quadrupoles focusing system of the initial part of RIB transport channel is performed. The influence of the Nitrogen beam space charge on transport of 120+ ions with energy of 60 keV is studied.