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Slide 1
© 2003 By Default!
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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Slide 2
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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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Slide 3
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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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Slide 5
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DRIBs-III

Modernization of existing accelerators (U400М & U400)
 Creation of the new experimental hall (≈ 2600 м2)
 Development and creation of next generation set-ups
 Creation of high current heavy ion accelerator
(A≤ 100, E ≤ 10 MeV ·A , I≥10 pµA)
2010 -2016
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≈ 60 М$
Slide 6
U400M CYCLOTRON
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2007 - 2009
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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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Slide 8
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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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Slide 9
U400 CYCLOTRON
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Slide 10
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U400  U400R GOALS
1) Beam intensity of masses A ≈ 50 and
energy ≈ 6 MeV/n up to 2.5 pμA
2) Ion energy variation on the target with factor 5
3) Energy spread on the target up to 10-3
4) Beam emittance on the target – 10 π mm · mrad
5) Cyclotron average magnetic field level
from 1.8 to 0.8 T
6) New equipment
The project is fully prepared!
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Slide 11
Decay
chains
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48Ca
+ 237Np
243Am
242Pu, 245Cm
244Pu, 248Cm
117/293 117/294
115/287 115/288 115/289 115/290
87 ms
32 ms
249Cf
a
10.59
10.46
a
113/283 113/284 113/285 113/286
0.1 s
0.48 s
a
111/279
0.17 s
a
10.37
a
10.12
10.00
a
111/280 111/281 111/282
3. 6 s
9.75
249Bk +48Ca
T1/2= 320d
109/275 109/276 109/277 109/278
9.7 ms
0.72 s
10.33
a
9.71
a
107/271 107/272 107/273 107/274
9.8 s
a
9.02
a
105/267 105/268 105/269 105/270
1.2 d
1.2 h
104/268 104/269 104/270
103/266
102/266
164
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Collaboration:
FLNR (Dubna) – ORNL (Oak-Ridge) –
LLNL (Livermore) – IAR (Dmitrovgrad)
-Vanderbilt University (Nashville)
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Expected decay chain of
the isotopes of element 117
4n
293
11.27 MeV
289
7.0 ms
10.48 MeV
285
0.15 s
10.13 MeV
0.04 s 277
9.60 MeV
0.42 s 273
8.65 MeV
269
55 s
265
270
105
274
107
278
109
117
294
249
Bk +
48
Ca
117
A. Sobiczewski 10/24.03.09
9.95 MeV
0.84 s 281
297
3n
282
111
286
113
8.42 MeV
5.1 min
266
103 103
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115
10.22 MeV
0.7 s
274
107
9.55 MeV
11 s
9.43 MeV
5.6 s
9.14 MeV
8.8 s
290
11.00 MeV
0.03 s
269
7.94 MeV
265
0.7h
266
103 103
270
105
8.42 MeV
5.1min
7.71 MeV
4.8h
266
6.41 MeV 6.55 MeV 102
5.9y
27y
SF
Slide 13
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Basic directions
of research
Next generation
of experimental setups
Heavy and superheavy nuclei
•
•
•
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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
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7. Separator of radioactive light exotic nuclei
8. Spectrometer for studying nuclear
reactions induced by RIBs
Slide 14
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STATUS of the MASS-SPECTROMETER
Mass-spectrometer MASHA at the beam line of the cyclotron U-400M
•
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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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Slide 15
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FIRST EXPERIMENTS
• Mass identification of 112 и 114 elements synthesized at the reactions
242Pu(48Ca,3n)287114(0.5 s) –> 283112(4 s)
• Mass identification of 113 elements synthesized at the reaction
243Am(48Ca,3n)288115 (0.1 s) →284113 (0.5 s)
Heater
Hot catcher
(graphite)
Target
112, 114
TO ECR
Separating foil
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Heavy ion
beam
Slide 16
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From ECR SOURCE to GAS CATCHER
Experimental facility for very heavy nuclei research
Detectors
Wien filter
Ion beam
Qf1
WF
Gas catcher
Qf2
D1
Q1 Q2
D2
Mass-spectrometer
MASHA
S2
Q3
Target box
Main parameters of recoil separator
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Solid angle ~ 30 msr.
Momentum acceptance – 10%.
Magnetic field – Bmax=0.3 T.
Electric field – Emax=10 kV/cm.
Focal plane beam diameter – 8 cm.
Total length – 8 m.
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S1
D3a
D3b
Slide 17
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“VASSILISSA” based velocity filter
for nuclear spectroscopy (joint JINR – IN2P3 project)
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Slide 18
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Acculinna−2 as ‘in−flight’ separator at U−400M cyclotron
GS
DRIBs
ACCULINNA-2
COMBAS
ACCULINNA
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RF kicker operating principle:
Beam species that have similar Br differ in TOF
Slide 19
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STATUS of PROJECT: 1) Letter of Intent (60 pages)
2) Complex calculation of ion−optical
system
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Slide 20
COMBAS + MSP
Achromatic Mode
Solid Angle Acceptance
Momentum Acceptance
Factor Suppression
Dispersion Mode (MSP)
Momentum Resolution
Length focal plane
Emax/Emin
Factor Suppression
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Ω(msr)
Δp/p(%)
%
2×10-4
150
5.2
0.1
cm
%
COMBAS
Primary
beam
Energy primary
Beam (MeV/amu)
Secondary
beam
11B
33
33
49
48
44
8He
11B
15N
18O
22Ne
Energy secondary Intensity secondary
beam (MeV/amu)
beam (pps)
9Li
11Li
14Be
17B
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27-10
26-10
37-10
35-10
40-10
2x104-103
4x105-104
8x103-8х102
5x104-5х103
1x103-102
12
20
50-80
MSP
Slide 21
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NEW GAS-FILLED SEPARATOR
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Slide 23
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DC200. MAIN PARAMETERS
Pole diameter
Magnetic field level
K factor
Weight
A/Z range
Injecting beam potential
Dee voltage
Flat-top dee voltage
Power consumption
Beam turns separation
Radial beam bunch size
Efficiency of beam transferring
Total accelerating potential
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4m
0.65÷1.15 T
200
500 t
4÷7
Up to 100 kV
2x130 kV
2x14 kV
250 kW
10 mm
3 mm
60%
up to ~ 40 MV
Slide 24
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DC200 CYCLOTRON DESIGN
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Slide 25
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NEW RESOURCES AND RESEARCH OPPORTUNITIES
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Slide 26
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NEW EXPERIMENTAL HALL
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Slide 27
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Financing (M$) and gain factors for SHE experiments
2009
2010
5.0
2011
11.0
2012
11.0
2013
11.0
2014
16,0
2015
3,0
2016
3,0
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 2×2
Experiment
20 (10 fb)
Technical requirements
Project
Building of set of equipments
Manufacturing of systems, construction
Launching
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Slide 28
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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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Slide 29
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THANKS FOR YOUR
ATTENTION!
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