© 2003 By Default! A Free sample background from Slide 1 JINR SCIENTIFIC COUNCIL 102 nd Session, September 2007, Dubna JINR SCIENTIFIC COUNCIL 102 nd Session, September 2007, Dubna ACTIVITY for the DRIBs PROJECT ACTIVITY for the DRIBs PROJECT S.N. DMITRIEV Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research S.N. DMITRIEV Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research

© 2003 By Default! A Free sample background from Slide 2 U400M CYCLOTRON

© 2003 By Default! A Free sample background from Slide 3

© 2003 By Default! A Free sample background from Slide 4 DRIBs Transport Gallery

© 2003 By Default! A Free sample background from Slide 5 U 400 CYCLOTRON U 400 CYCLOTRON

© 2003 By Default! A Free sample background from Slide 6 DRIBs Project

© 2003 By Default! A Free sample background from Slide 7 DRIB’s complex equipment Power supply for magnet – 165 units Power supply for magnet – 165 units ECR-source - 2 ECR-source - 2 Vacuum pumps - 49 Vacuum pumps - 49 Beam current diagnostics – 35 Beam current diagnostics – 35 Diagnostic station for RIB – 9 Diagnostic station for RIB – 9 RF systems – 9 RF systems – 9

© 2003 By Default! A Free sample background from Slide 8 DRIBs from 2004 to year Run 2004 year Run 2006 year Run 2006 year Run

© 2003 By Default! A Free sample background from Slide 9 Program of modernization of the FLNR cyclotron complex 1. U400M 1. U400M 2. U400 – U400R. 2. U400 – U400R. 3. MT25 3. MT25

© 2003 By Default! A Free sample background from Slide 10 Modernization of the U400M cyclotron 1) to increase the light ion beams intensity by the factor of 4 – 5 for producing of secondary beams, 2) to improve the quality of beams, 3) to increase the maximal energy of accelerated ions up to 100 MeV/A, 4) to improve the radiation safety conditions, 5) to accelerate “low” (6÷15 MeV/A) energy ions (move some experiments from U400 to U400M), 6) to extract the beams to the second direction.

© 2003 By Default! A Free sample background from Slide 11 February – September 2007 new axial injection line; new axial injection line; new “warm” ECR ion source (DECRIS-2); new “warm” ECR ion source (DECRIS-2); new magnetic structure of the central region of U400MR; new magnetic structure of the central region of U400MR; second beam extraction system; second beam extraction system; new producing target for secondary beams; new producing target for secondary beams; new local radiation shielding; new local radiation shielding; superconducting 18-GHz primary beam ion source DECRIS-SC2 (under testing); superconducting 18-GHz primary beam ion source DECRIS-SC2 (under testing); “warm” 14-GHz secondary beam ion source (under testing). “warm” 14-GHz secondary beam ion source (under testing).

© 2003 By Default! A Free sample background from Slide 12 Total modernization of the target unit 1) Development design of the disposable, nonseparable, quick-detachable, target block. 2) 6 He output diagnostics from the catcher. 3) Creation of effective neutron traps around the target. 4) Ajustment of the new 14 GHz ion source. 5) Generation and acceleration of the He 8.

© 2003 By Default! A Free sample background from Slide 13 New axial injection line

© 2003 By Default! A Free sample background from Slide 14 New 14 GHz Ion source

© 2003 By Default! A Free sample background from Slide 15 Low energy beam line Low energy beam line

© 2003 By Default! A Free sample background from Slide 16 New Catcher

© 2003 By Default! A Free sample background from Slide 17 Fusion, transfer and breakup reaction mechanisms induced by halo nucleus 6 He JINR (Dubna), CSNSM (Orsay), IRS (Strasbourg), ULB (Bruxelles), Vanderbilt Univ. (USA) 6 He Er 172 Yb* 166 Yb + 6n 6 He Er 170 Yb* + 2n 6 He Er 168 Er* + 4 He 166 Er( 6 He,6n) 166 Yb & 165 Ho( 6 Li,5n) 166 Yb 166 Er( 4 He,4n) 166 Yb //PRC48(1993)319// 321 DRIBs Nov.-Dec. ’07 Chan.2 U400

© 2003 By Default! A Free sample background from Slide 18 Deep sub-barrier fusion of 6 He Pb For E < 20 MeV (2n channel)  MSP-144 (focal plane) For E < 20 MeV (2n channel)  MSP-144 (focal plane)  E~  2.5MeV astrophysics, nucleosynthesis SETUP FOR ACTIVATION MEASUREMENTS with MSP-144 dE/dx~40keV/m m  target ~20mm  E ~  0.4MeV

© 2003 By Default! A Free sample background from Slide 19 5)Cyclotron average magnetic field level from 0,8 up to 1,8 T. U400  U400R 2)Ion energy variation on the target with factor 5. 1)Beam intensity of masses A ≈ 50 and energy ≈ 6 MeV/n up to 3 ρμa. 3)Energy spread on the target up to )Beam emittance on the target – 10 π mm · mrad. 6)New equipment.

© 2003 By Default! A Free sample background from Slide 20 №Jobs Drawing 2. Creation and equipment completion 3.Assembling 4. Equipment and beam testing Plan of modernization U400  U400R

© 2003 By Default! A Free sample background from Slide 21 MT25 – generator of primary electron beam for DRIBs II phase. MT25 – generator of primary electron beam for DRIBs II phase. Main problem – old subsystems equipment. Main problem – old subsystems equipment. Modernization of MT25 is connected with DRIBs II phase. Modernization of MT25 is connected with DRIBs II phase. MICROTRONMICROTRON

© 2003 By Default! A Free sample background from Slide 22 JINR SCIENTIFIC COUNCIL 102 nd Session, September 2007, Dubna JINR SCIENTIFIC COUNCIL 102 nd Session, September 2007, Dubna ACTIVITY for the DRIBs PROJECT ACTIVITY for the DRIBs PROJECT S.N. DMITRIEV Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research S.N. DMITRIEV Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research THANKS FOR YOUR ATTENTION THANKS FOR YOUR ATTENTION

© 2003 By Default! A Free sample background from Slide 23 Estimated results and experimental method Immediate object proposed for the primary experiments is the study of complete fusion and breakup reaction of 6 He halo nuclei taking place in the interactions with medium mass targets at the energy range E=5-10 MeV/nucleun. The experiment is aimed at the following tasks: 1. In a range of E lab =55-62 MeV the cross section will be measured for the 166 Er( 6 He,6n) 166 Yb reaction. Data on 5n evaporation will be also obtained. Reaction products resulting from the 6 He breakups will be observed too. 2. Population probabilities will be measured for the levels of the ground-state rotational band in 166 Yb. These data will be compared with calculations treating both the neutron evaporation cascade and the multiple emission of  rays at the stage of the nucleus descent along the yrast line. The search of a peculiarity in the values of orbital momentum allowed for the compound nucleus formation should be possible. It will interesting to know if there are orbital momentum going beyond the typical l crit values peculiar to non-halo nuclei. 3. In the case of the breakup reactions 6 He+ 166 Er=> 170 Yb*+2n and 6 He+ 166 Er=> 168 Er*+  energy sharing among the breakup cluster (2n or  ) and recoil nucleus will be estimated from the measured yields of the evaporation residues and the energy spectra E n and E . 4. Additionally, 6 Li+ 165 Ho and 6 Li+ 166 Er reactions will be studied at quite similar projectile energies MeV. In the 1 st case the same evaporation residue 166 Yb populated in 5n channel will be investigated and in the 2 nd the products of the 6 Li breakup ending with the capture of its  cluster by 166 Er will be studied. Beam time estimation: 4 weeks per 6 He and 1 week per 6 Li.