laboratory of nuclear...
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Laboratory of Nuclear Problems
Alexey Zhemchugov
8 July 2014
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We still do not know ...
● ... why elementary particles have different mass?
● ... are there any more flavours of quarks and leptons?
● ... the properties of neutrino?
● ... if Standard Model describe all possible phenomena?
● ... why there is much more matter than antimatter?
● ... what is the 'dark matter' is made of?
● ... why quarks are confined inside hadrons and how strong interaction works?
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Foundation
● 18 August 1946. Soviet government approved the proposal of Academician Igor Kurchatov to construct in USSR ''the installation M''.
● 14 December 1949. The 480 MeV synchrocyclotron started operation at the Hydrotechnical Laboratory in Dubna, the most powerful accelerator in the world.
● 26 March 1956. Laboratory of Nuclear Problems of JINR has been founded.
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Synchrocyclotron 680 MeV (1949)
M.G.Meshcheryakov
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Timeline
● Since 1949 – experiments at the synchrocyclotron
● Since 1967 – experiments at U-70 (IHEP, Protvino)
● 1979-1984 - synchrocyclotron upgraded to phasotron
● 1982 – 2000 г. – experiment DELPHI at LEP (CERN)
● Since 1992 – participation in the ATLAS experiment at LHC
● 1993 - 2014 - participation in CDF и D0 experiments at FNAL
Radiochemistry, nuclear spectroscopy, accelerator physics and technology, radiation medicine and radiobiology developed at LNP as well
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Discoveries
1.Direct deuteron liberation from nuclei by high energy nucleons (1957)
2.Cell self-recovery after lethal irradiation (1957)
3.Discovery of Helium-8 (1959)
4.Radiationless transitions in mesoatoms (1959)
5.Conservation of vector current in weak interactions (1962)
6. Negative pion capture by the chemically bound hydrogen nuclei (1962)
7.Pion double charge exchange (1963)
8.Discovery of muonium in condensed matter (1965)
9. Change of relative intensity of K-series X-rays from mu-mesoatom (1965)
10. Resonant formation of muonic deuterium molecules (1965)
11. Resonant absorption of negative muons by nuclei (1968)
12. Muon spin precession with two frequencies in muonium atom in magnetic field (1969)
13. Capability of one-electron atoms to be a deep donors in semiconductor crystals (1969)
14. Quantum incoherent diffusion of positive muons in solid materials (1972)
15. Proton spin flipping during elastic scattering on protons at high energy (1975)
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Great minds of the Laboratory
Mikhail MESHCHERYAKOV Venedikt DZHELEPOV Bruno PONTECORVO
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Structure of the Laboratory
● about 650 employees
● among them about 500 scientific staff
Particle physics
Hadronphysics
Colliderphysics
Multiple hadron
production
Radiochemistry& nuclear
spectroscopy
Acceleratortechnology
IT, design office, workshops, services etc
Phasotron &radiation medicine
Intermediate energies
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Fundamental research
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Main directions
● Physics at LHC
– ATLAS● Neutrino physics
– OPERA, BOREXINO, Daya Bay, BAIKAL-GVD, NEMO, GERDA, TGV, GEMMA, JUNO, NOVA
● Strong interaction and QCD
– QCD tests: BES-III, ANKE, DIRAC– Spin physics: COMPASS, SPD @ NICA
● Relativistic nuclear physics
– MPD @ NICA, PANDA @ FAIR
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ATLAS at LHC
@CERN
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ATLAS experiment
Main goals:
● Search for Higgs boson
● Tests of Standard Model at energies > 2 TeV
● Top quark properties
● Physics beyond Standard Model (supersymmetry etc)
● many more ...
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ATLAS experiment
Main goals:
● Search for Higgs boson
● Tests of Standard Model at energies > 2 TeV
● Top quark properties
● Physics beyond Standard Model (supersymmetry etc)
● many more ...
The principal source of experimental data for the next 20 years!
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Neutrino physics
大亚湾
NOVA
БАЙКАЛ
Daya Bay
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BAIKAL-GVD
Str
ing
secti
on
, 12
OM
s
R ~ 60 mL
~ 34
5 -
705
m
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Neutrino physics
Main goals
● Direct observation of νμ→ντ (OPERA)
● Measurement of θ13 ⇒ search for CP-violation in lepton sector (DayaBay)
● Search for neutrinoless 2β decay (NEMO, GERDA, TGV)
● Neutrino magnetic moment (GEMMA-2)
● Neutrino astronomy and astrophysics (BAIKAL-GVD)
● Neutrino mass hierarchy (Juno, Nova)
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Strong interaction
Main goals:
● Precision tests of QCD ⇒ nuclear forces, hadronization, confinement
● Hadron spectroscopy and search for exotic particles
● Nucleon structure and «spin crisis»
● Dense nuclear matter and formation of quark-gluon plasma
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Heavy-ion collider NICA
Нуклотрон
NICA
Нуклотрон
SPD
MPD
Start expected in 2019
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Accelerator complex FAIR
GSI, Darmstadt, Germany Start expected in 2018
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BES-III and COMPASS
BES-IIIBeijing, China
COMPASS @ CERN
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Accelerator technology and applied research
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● Observation: particle and nuclear physics stimulates high technology
● Accelerators ⇐⇒ vacuum and cryogenic technology, superconducting magnets, automation
● Detectors ⇐⇒ ultrafast electronics, semiconductors, novel materials, high precision combined with the huge size
● Computing: LHC gives 10000 TB of data per year ⇒ grid-technologies
● Nuclear technology: radiation medicine, material science, industrial accelerators
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Cyclotrons constructed at LNP in recent years
● Russia, Tver, industrial cyclotron RIC-30
● Uzbekistan, Tashkent, Cyclotron U-150
● Poland, Cracow, Cyclotron AIC-144
● Belgium, Louvain-la-Neuve, IBA, medical cyclotron С235
● Research projects: medical cyclotron С250, superconducting cyclotron
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Hybrid pixel detectors
flip-chip bonding
high resistance n-type semiconductor GaAs:Cr
Sensor GaAs:Cr
aluminium layer
single pixel Medipix readout
+-
JINR joined Medipix collaboration in 2016
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MARS-CT
● Manufactured by MARS Bioimaging Ltd., New Zealand
● Fully-functional microCT equipped with two GaAs:Cr+Medipix3 detectors
● Spatial resolution about 30 um
● X-ray energy up to 120 keV
● Sample size up to Ø 10 cm X 30 cm
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Radiation medicine
● Research on methods of proton therapy
● Cancer treatment by Phasotron beams
● Design and construction of specialized medical cyclotrons (collaboration with IBA)
Also ● Novel imaging detectors for CT and X-ray diagnostics
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Welcome to the Laboratory of Nuclear Problems!