JINR PAC DUBNA 2002 Research Program One of the most compelling questions in modern Nuclear Physics is what role quark and gluon degrees of freedom play in nuclear structure and in the dynamic of nuclear matter! What is possible contribution of the DISK project research program to clarify this problem? The goal of experiments at DISK spectrometer is study of cumulative particle production. Baldin,1971 Quark-parton structure function Short-range multinuclon correlation Hypothesis of вЂњminimal economical interactionsвЂќ V.Stavinsky, 1981 2 S m i n = ( X I PI + X II P II ) 2 X = X I + X II + 2 пЃ§ X I XII 2 Subthreshold High-PT and processes Cumulative Z-scaling reactions Dynamic Correlation X Im I+ X IIm II m + ( X Im I+ X IIm II+ m 3) 2 S m i n = ( X I PI + X II P II ) mN P < P N> ~ ( X Im I+ X IIm II+ m III) M R2(> 10) P, 500 Mev/c, 90o < P N> = 1 . 1 4 G e v / c < пЃ‘ N> = 7 3 0 < P N> = 0 . 8 2 G e v / c Cumulation Correlation < пЃ‘ N> = 3 9 0 Results of Experiments in 1997-2001 JINR-Yerevan Physics Institute Asymmetry of deuteron photodisintegration process by linearly polarized photons Experiments at AGS (EVA/E850 Collaboration) Color Transparency ENERGY DEPENDENCE OF NUCLEAR TRANSPARENCY IN C(P, 2P) SCATTERING. Phys.Rev.Lett.87:212301,2001 Experiments at AGS (EVA/E850 Collaboration) N-P Short Range Correlations from (P,2P + N) Measurements. . AIP Conf.Proc.549:451-454,2002, Submitted to Phys.Rev.Lett Backward emitted high-energy neutrons in hard reactions of p and p+ on carbon Nucl-ex/00050006 28 may 2000 Detector Upgrade Cryogenic Targets The high effective nonmagnetic spectrometers (10 spectrometers) based on organic and NaI(Tl) scintillators needed for the registration of neutrons and photons are included in the setup Identification Methods Neutron/Photon Separation by Pulse Shape Analysis (Detectors with Stylben Crystals) ADC , chan ADC1 , hcan. TDC , chan. ADC , chan Charged Particle Separation by TOF-E Analysis (Detectors with Plastic Scintillators and NaJ(Tl) Crystals) TDC , chan. Neutron Spectra Obtained with Spectrometer Trigger System development Cooperation with Nuclear Physics Institute (Czech Republic) on the design and manufacturing of the Silicon Vertex Tracker. Experimental program at NUCLOTRON in 2003-2005 FROM THE SUMMARY OF THE ROUND TABLE DISCUSSION AT VARNA WORKSHOPвЂ™01 PHYSICAL PROBLEMS вЂў Strangeness in light nuclei (deuterium, helium) and K-meson asymmetry in the cumulative region. вЂў Exclusive pD break-up reaction at high transverse momentum , spin asymmetry and color transparency. вЂў The structure of relativistic compound systems. вЂў Dynamic correlations in the cumulative production processes. вЂў Fragmentation of polarized deuterons into cumulative mesons. REQUIREMENTS TO THE NUCLOTRON 2002 2003 2004 2005 Beams Intensity Spill duration Operating time in use p, d, dп‚ , p, d, d п‚, p, d, d п‚, p, d, d п‚, 1010-107 1011-109 1011-107 1011-107 1,0 s 5,0 s 10,0 s 10,0 s 2000 hours 2500 hours 3000 hours 3500 hours Installation of Beam Detectors at Beam Line of Nuclotron Conclusion Our request is to extend the project with the first priority for the next 3 years and to provide a level of the financial support not less than it was in 20002002.