[en] The P^¯ANDA collaboration (anti-Proton ANnihilations at DArmstadt) is a next generation hadron physics experiment to be operated at the future Facility for Antiproton and Ion Research (FAIR) at Darmstadt, Germany. It will use intensive cooled antiproton beams with a momentum between 1.5 GeV/c and 15 GeV/c. The P^¯ANDA detector is a state-of-the-art internal target detector allowing the detection and identification of neutral and charged particles almost in the whole solid angle. One of the major goal of the experiment is the comprehensive study of charmonium and candidates to the hybrids, molecules and other exotics. Charmonium states with different quantum numbers can be reached via the decay of these resonances. The P^¯ANDA will scan the parameters of the resonances in formation mode with the use of the excellent momentum resolution Δp/p=10⁴ – 10⁵ of the HESR beam. The precision measurements of light mesons mass and width will be fulfilled as well as glueball search. Study of double hyperon production including their spin properties is another important item of the P^¯ANDA experiment

[en] IHEP has rich program devoted to the spin physics studies. New experimental program will significantly increase the number of reaction investigated at large kinematic region. The experiment will measure different polarization variables in inclusive and exclusive reactions, including single- and double-spin asymmetry, polarization, spin transfer parameters. One of the most important task is the creation of the polarized beam and especially polarized anti-proton beam.

[en] The stabilization of the beams of large-sized multi-beam hybrid mirror antenna (MBHMA), the reflector profile of which is subject to distortion due to changing operational factors, is a complicated technical task. One of the ways to maintain energy efficiency of the satellite communications system in these circumstances is to adapt the amplitude-phase distribution of the clusters of the antenna array to random deformations of the reflector. By statistical modeling, the potentially achievable characteristics of the system are evaluated. Three variants of adaptation of cluster excitation were modeled: a) for fixed clusters, b) for adaptation of excitation, c) for adaptation of weights and position of clusters, d) for adaptation of weights and cluster configurations. For multivariate calculations, we use the simplified model of MBHMA that we have proposed. Comparison with calculations in Ticra Grasp environment confirmed the correctness of the model. Not only radiation patterns, but also focal spots on the antenna array we calculated to determine the rational composition of cluster elements and the vector of their excitation coefficients. Beams gain within the service area for reflector deformations were the subject of analysis. The studies showed that gain decrease can be reduced to 0.1 … 0.2 dB instead of 1.6 dB taking place without adaptation. (paper)

[en] The Shashlyk calorimeter prototype for the PANDA experiment has been constructed at IHEP and experimentally tested using the 1-19 GeV electron beam with high precision momentum tagging at the IHEP accelerator. Results of the first measurements for the fine-segmented Shashlyk calorimeter prototype in the wide energy range up to 19 GeV are presented. Fair energy and position resolutions having been obtained are in a good agreement with the Monte-Carlo simulations. Detection inefficiency due to holes for straight light fibers has turned out to be negligible for PANDA. Plans for the near term future including approaching test beam study of π⁰ reconstruction capability of shashlyk prototype are also discussed.

[en] A feasibility of the proton beam polarimetry based on exploiting the observed large single-spin asymmetry A_N in inclusive charged pion production is evaluated for the SPASCHARM experiment at IHEP, Protvino, Russia. It is shown that, for a few hours of beam exposition time, the beam polarization could be measured at the statistical errors of ∼3-5%. The inclusive pion polarimetry at SPASCHARM does not require construction of a special polarimeter. The polarimetry will be carried out entirely by the main SPASCHARM spectrometer simultaneously with physics data taking. (paper)

[en] The design and parameters of the polarized-beam facility at U-70 proton synchrotron of IHEP, Protvino, are presented. The polarized proton and antiproton beam line 24A is currently under development at IHEP. It will serve as a main playground for carrying out the rich program of the SPASCHARM experiment for comprehensive studies of spin phenomena in a wide variety of hadronic reactions in the beam energy range of ∼10–45 GeV. (paper)

[en] A new experiment SPASCHARM devoted to a systematic study of polarization phenomena in hadron-hadron interactions in the energy range 10-70 GeV is under preparation at IHEP (Protvino). The physical observables will be single-spin asymmetries, hyperon polarizations and spin-density matrix elements. A universal setup will detect and identify various neutral and charge particles in the full azimuthal angle and a wide polar angle range. A polarized target is used to measure the SSA. The SPASCHARM sub-detectors are being designed and constructed now. The possibility of obtaining a polarized proton beam for the SPASCHARM experiment from Lambda decays is under study.

[en] Newly developing SPASCHARM (SPin Asymmetry in CHARMonia) experiment at U70 accelerator will give the unique possibility to measure spin effects with the use of polarized proton and antiproton beams and polarized target. We suggest to carry out the measurements of the pp and p(bar)p elastic scattering spin observables at 16 GeV/c (direct reconstruction of elastic pp and p(bar)p elastic scattering amplitudes at SPASCHARM experiment). To date the direct reconstruction of amplitudes for pp elastic scattering was performed up to 6 GeV/c only, meanwhile there is no available data for p(bar)p elastics scattering. New measurements at SPASCHARM will significantly extend the energy range of the spin studies and will give unique possibility to compare elastic pp and p(bar5)p scattering (paper)

[en] The polarized proton and antiproton beam channel is currently under development at the U-70 accelerator of IHEP, Protvino, Russia. An availability of the both, polarized protons and antiprotons provides an exciting opportunity for the comparative studies of spin effects induced by polarized protons and antiprotons in a variety of hadronic reactions. While the proton and antiproton beams are formed by essentially the same method, there is the specific in the antiproton beam shaping and properties compared to protons. In this report, we address some technical details of forming the polarized antiproton beam and describe its main properties. (paper)

[en] A new single-spin asymmetry A_N measurement has been carried out at IHEP at 50 GeV. A_N was found to be -(6.2±1.5)% in the polarized target fragmentation region at -0.6< x_F<-0.25. The result proves that asymmetry does not depend on beam energy. A review of polarization results from Protvino as well as a proposal of the new experiment SPASCHARM are also presented.