Search

The Compressed Baryonic Matter (CBM) experiment at FAIR will play a unique role in the exploration of the QCD phase diagram in the region of high net-baryon densities, because it is designed to run at unprecedented interaction rates. High-rate operation is the key prerequisite for high-precision measurements of multi-differential observables and of rare diagnostic probes which are sensitive to the dense phase of the nuclear fireball. The goal of the CBM experiment at SIS100 (√sNN = 2-4.9 GeV) is to discover fundamental properties of QCD matter, namely, the equation-of-state at high density as it is expected to occur in the core of neutron stars, effects of chiral symmetry, and the phase structure at large baryon-chemical potentials (μB ≥ 500 MeV).We are focusing here on the contribution of JINR to the CBM experiment: design of the superconducting dipole magnet; manufacture of the straw and micro-strip silicon detectors, participation in the data taking and analysis algorithms and physics program.

In the last 10 years, the advent of high power ion beams (HPIB) gave new opportunities to use them as an instrument in some areas of the applied and fundamental physics such as: plasma coherent radiation, equation of solid state, controlled fusion, stability issues. This paper suggests the novel HPIB application for fundamental nuclear physics, namely for the measurement of nuclear reaction cross-sections of light elements in the range of infra low energies of 100-2000 eV. In fact, existing experimental data on cross-sections for those reactions covers the range only above 6-10 keV and respective values are higher than 10/sup -31/ cm/sup 2/. The proposed novel approach will decrease several orders the threshold value of cross-sections measured and provide new information on charge symmetry of nuclear forces and on the mechanism involving exchange meson currents. We propose to use the high intensity radially converging ion flow generated during the plasma liner implosion at the high power pulsed generator. For the d+d, d+t, p+d reactions products' registration the scintillator X-rays, neutron spectrometers and charge particle track detectors will be used. The lower threshold of the cross-section value measured by the proposed method could be as low as 10/sup -40/ cm/sup 2/. In the paper are given the various experimental schemes, calculations of the cross-section values and results of the preliminary study.