Spin physics at JINR: Present and future
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pin Physics at JINR: Present and Future1, 2 A. P. Nagaytsev Joint Institute for Nuclear Research, Dubna, 141980 Russia Abstract—A short review of spin physics program at JINR is presented. The proposals on spin program at the NICA collider are discussed. The main purpose of this program is to study the nucleon spin structure and other phenomena with polarized proton and deuteron beams. DOI: 10.1134/S1063779613060166 21
JINR was one of the Scientific Centers which started to develop the High Energy Spin Physics in the early 1950s. Many experimental and theoretical inventions were originated in Dubna. The first mea surements on pp and pn elastic scatterings [1], produc tion of polarized proton beams in 1954, development of polarized targets and other experimental equip ments, were realized at Dubna. These achievements were developed and extended in a number of experi ments in the 70s, 80’s and 90’s, in the world’s largest centers for high energy physics. Outstanding works of JINR theorists contributed essentially in spin physics and international workshops on spin physics (DSPIN) take place every two years in Dubna that is also essen tial to promote and develop spin physics. One of the most important early achievements at JINR was con struction of polarized targets and development of their technology. A polarized solidstate target is one of the most important elements in the technique of polariza tion experiments. A new technique to produce low temperatures by dissolving 3He in 4He, which was worked out at the JINR in 1966 by the group headed by B.S. Neganov [2], enabled one to construct frozen spin polarized targets, which are still working in the major experimental setups on spin physics, such as COMPASS, COMPASS2 and others. Dubna physi cists built a new type of very efficient polarized targets, the so called “frozen spin” target [3]. This target was very intensively used to study the polarization phe nomena in the exclusive charged exchange reactions induced by negative pions of 40 GeV/c and later—in inclusive reactions. A set of experiments on spin physics were per formed at JINR with the Movable Polarized Proton Target (MPPT) [4]. It was a large target, 20 cm long and 3 cm in diameter, transported to Dubna and reconstructed at the Dzhelepov Laboratory of Nuclear Problems (DLNP) during 1994 by Russian, Ukrai nian, and French experts. It was installed at the Syn 1 Plenary talk at the 20th International Symposium on Spin Phys
chrophasotron beam line and used in the first experi ment in March 1995. During 1996 and 1997 a new polarizing solenoid for the MPPT was constructed at the Laboratory of High Energies (LHE). The MPPT is to be completed by the vertical superconducting hold ing coils, constructed in Kharkov and tested in Dubna. The target can work using hydrogenous as well as deu terated polarizable compounds, including 6LiD (MDT). It is operated by the international polarized target group from several laboratories. The main accelerator complexes to investigate polarization phenomena and spin
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