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JINR SCIENTIFIC COUNCIL 106nd Session, 24
September 2009, Dubna
STATUS of MAJOR BASIC FACILITY PROJECTS of the
SEVEN-YEAR DRIBs III PROJECT
S.N. DMITRIEV Flerov Laboratory of Nuclear
Reactions, Joint Institute for Nuclear Research
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BASIC DIRECTIONS of RESEARCH

• 1. Heavy and superheavy nuclei
• Synthesis and study of properties of superheavy
  elements
• Chemistry of new elements
• Fusion-fission and multi-nucleon transfer
  reactions
• Mass-spectrometry and nuclear spectroscopy of SH
  nuclei

• 2. Light exotic nuclei
• Properties and structure of light exotic nuclei
• Reactions with exotic nuclei

3. Radiation effects and physical bases of
nanotechnology
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SOME RESULTS in STUDY of SUPERHEAVY NUCKLEI
Synthesis of 5 new elements and 34 new
superheavy isotopes
Limiting role of quasi-fission in synthesis of SH
nuclei
Relativistic chemistry of SHE
Spectroscopy of SH nuclei
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SOME RESULTS in STUDY of EXOTIC NUCKLEI
Discovery of di-neutron inside 6He
Observation of energy structure of neutron-rich
exotic nuclei 5H, 7H, 10He
Observation of sub-barrier fusion enhancement of
6He
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DRIBs-III

• Modernization of existing accelerators (U400?
  U400)
• Creation of the new experimental hall ( 2600 ?2)
• Development and creation of next generation
  set-ups
• Creation of high current heavy ion accelerator
• (A 100, E 10 MeV A , I10 pµA)

2010 -2016 60 ?
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U400M CYCLOTRON
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2007 - 2009

• new axial injection line
• new warm ECR ion source (DECRIS-2)
• new magnetic structure of the central region of
  U400MR
• second beam extraction system
• new producing target for secondary beams
• new local radiation shielding
• superconducting 18-GHz primary beam ion source
  DECRIS-SC2 (under testing)
• warm 14-GHz secondary beam ion source (under
  testing).

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MODERNIZATION of the U400M CYCLOTRON

• The main goals of modernization are achieved
  (the light ion beams intensity, the quality of
  beams, acceleration of low energy ions)
• The critical point becomes the operation
  stability (now is 50) caused by existing
  infrastructure
• We can not modernize it we need to create the new
  one

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U400 CYCLOTRON
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U400 ? U400R GOALS

• Beam intensity of masses A 50 and
• energy 6 MeV/n up to 2.5 pµA

1. Ion energy variation on the target with factor 5

1. Energy spread on the target up to 10-3

1. Beam emittance on the target 10 p mm mrad

• Cyclotron average magnetic field level
• from 1.8 to 0.8 T

1. New equipment

The project is fully prepared!
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48Ca
Decay chains
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Expected decay chain of the isotopes of element
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A. Sobiczewski 10/24.03.09
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Basic directions of research
Next generation of experimental setups

• Heavy and superheavy nuclei
• Synthesis of superheavy elements
• Chemistry of new elements
• Fusion-fission and multi-nucleon
• transfer reactions
• Mass-spectrometry and nuclear
• spectroscopy of SH nuclei

1. Universal gas-filled separator of superheavy
nuclei 2. Pre-separator for radiochemical and
mass-spectrometric researches 3. Cryogenic
detector for studying chemical properties of
SHE 4. Gas catcher for collecting and production
of single-charged ions 5. Wide aperture
separator and spectrometer of nucleon transfer
and fission reaction products 6. Radiochemical
laboratory of II class

• Light exotic nuclei
• Structure of light exotic nuclei
• Reactions with exotic nuclei

7. Separator of radioactive light exotic
nuclei 8. Spectrometer for studying nuclear
reactions induced by RIBs
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STATUS of the MASS-SPECTROMETER
Mass-spectrometer MASHA at the beam line of the
cyclotron U-400M

• New beam line with low energy of the U-400M was
  built
• Mass-spectrometer mounted at the new beam line
• Hot catcher is ready
• Focal plane detector system is ready
• Start of test experiments december of 2009

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• FIRST EXPERIMENTS
• Mass identification of 112 ? 114 elements
  synthesized at the reactions
• 242Pu(48Ca,3n)287114(0.5 s) gt 283112(4 s)
• Mass identification of 113 elements synthesized
  at the reaction
• 243Am(48Ca,3n)288115 (0.1 s) ?284113 (0.5 s)

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From ECR SOURCE to GAS CATCHER
Experimental facility for very heavy nuclei
research

• Main parameters of recoil separator
• Solid angle 30 msr.
• Momentum acceptance 10.
• Magnetic field Bmax0.3 T.
• Electric field Emax10 kV/cm.
• Focal plane beam diameter 8 cm.
• Total length 8 m.

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VASSILISSA based velocity filter for nuclear
spectroscopy (joint JINR IN2P3 project)
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Acculinna-2 as in-flight separator at U-400M
cyclotron
GS
DRIBs
RF kicker operating principleBeam species that
have similar Br differ in TOF
ACCULINNA-2
COMBAS
ACCULINNA
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STATUS of PROJECT 1) Letter of Intent (60
pages) 2) Complex calculation
of ion-optical system
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COMBAS MSP
Achromatic Mode Solid Angle Acceptance O(msr) 12 M
omentum Acceptance ?p/p() 20 Factor
Suppression 50-80 Dispersion Mode
(MSP) Momentum Resolution 210-4 Length focal
plane cm 150 Emax/Emin 5.2 Factor
Suppression 0.1
Primary beam Energy primary Beam (MeV/amu) Secondary beam Energy secondary beam (MeV/amu) Intensity secondary beam (pps)
11B 33 8He 27-10 2x104-103
11B 33 9Li 26-10 4x105-104
15N 49 11Li 37-10 8x103-8?102
18O 48 14Be 35-10 5x104-5?103
22Ne 44 17B 40-10 1x103-102
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NEW GAS-FILLED SEPARATOR
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DC200. MAIN PARAMETERS
Pole diameter 4 m
Magnetic field level 0.651.15 T
K factor 200
Weight 500 t
A/Z range 47
Injecting beam potential Up to 100 kV
Dee voltage 2x130 kV
Flat-top dee voltage 2x14 kV
Power consumption 250 kW
Beam turns separation 10 mm
Radial beam bunch size 3 mm
Efficiency of beam transferring 60
Total accelerating potential up to 40 MV
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DC200 CYCLOTRON DESIGN
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NEW RESOURCES AND RESEARCH OPPORTUNITIES
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NEW EXPERIMENTAL HALL
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Financing (M) and gain factors for SHE
experiments
2009 2010 5.0 2010 5.0 2011 11.0 2011 11.0 2011 11.0 2012 11.0 2013 11.0 2014 16,0 2015 3,0 2016 3,0
2009 Total gain Total gain Total gain Total gain Total gain Total gain Total gain Total gain Total gain Total gain
Existing cyclotron U400 Gas-filled separator
Modernization of the cyclotron U400
New FLNR experimental hall
New gas-filled recoil separator
High intensity heavy ion cyclotron DC200
Experiment 1
Experiment 2
Experiment 22
Experiment 20 (10 fb)
Technical requirements
Project
Building of set of equipments
Manufacturing of systems, construction
Launching
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Completion of the Project DRIBs-III in the whole
will not only increase by an order of magnitude
the efficiency of experiments in the field of SHE
synthesis, but will also allow substantially
widen the spectrum of researches in the field of
heavy and light exotic nuclei.
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THANKS FOR YOUR ATTENTION!