[en] Fast ignition (FI) of a conically guided DT assembly by a laser-accelerated deuteron beam is proposed. The uniformly pre-compressed fuel of 300 g cm^-3 is heated by the deuteron beam of a Maxwellian energy distribution with a temperature of 3 MeV. This scheme makes full use of the deposited energy of the alpha particles produced by the athermal nuclear reactions and can save about 4.5% ion-beam energy compared with the FI by fast proton or carbon ion beams. The ignition energy delivered by the external beam can be reduced appreciably.

[en] Deuteron beam has been successfully accelerated in the KEK PS up to the energy of 11.2 GeV (5.6 GeV/u), the limiting energy of the ring. The first physics experiment with deuteron beams was carried out in April of 1992 after this success. Helium beam acceleration is scheduled in April in 1994

[en] 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.

[en] A kinematically complete double-polarization measurement of the quasi-free np → {pp}_s π⁻ reaction near threshold has been performed using the ANKE spectrometer at COSY-Jülich. Here {pp}_s represents a two-proton system with an excitation energy less than 3 MeV. The transversely vector polarized deuteron beam and the internal polarized ANKE hydrogen target were used to determine the spin-correlation coefficients A_x,x and A_y,y. Events from the quasi-free np → dπ⁰ reaction were recorded simultaneously and used for both beam and target polarimetry. In addition, the product of the beam and target polarizations could be estimated from the A_y,y coefficient. The storage cell within the polarized target was the main source of background events. Dedicated runs, with no gas in the cell and with the cell filled with N₂ gas, were taken to study the backgrounds. The data analysis procedure and the initial results of the experiment are presented.

[en] The design of the Continuous Wave Deuterium Demonstrator (CWDD) and the status of the fabricated hardware is presented. The CWDD is a high brightness, 352 MHz, CW linear accelerator designed to deliver a 7.54 MeV, 80 mA D^- beam at a transverse normalized rms emittance of 0.11 π mm-mrad and a longitudinal rms emittance of 0.20 π mm-mrad. End-to-end beam dynamics analysis for nominal and off-design conditions is described. The tuning and predicted operational performance of the as-built device are also discussed. These results all indicate that the present design can meet the output performance specifications in the presence of combined errors at the limits of the specified engineering tolerances. Preliminary injector operations have been conducted at AEA Technologies, Culham Laboratory and at Argonne National Laboratory, where the CWDD is sited. Initial RFQ beam experiments at Argonne are projected for early 1994. DTL installation and commissioning will be completed in 1995

[en] Multi-species impact is of high relevance for fusion reactors, where, in addition to the hydrogen fuel, the He ash, impurity species (e.g., C and O), and in some cases injected elements are also present. Combined irradiation of graphite with relatively low-energy H⁺ (typically below 100 eV) and energetic (above 300 eV) hydrogenic and non-hydrogenic ions leads to an enhancement of the chemical erosion yield compared to the low-energy H⁺-only case. This is due to the additional energy deposition and associated lattice damage by the added energetic ions. Studies of combined species irradiation also have the potential to enhance our understanding of the mechanisms leading to erosion and hydrogen transport in graphite. Mixed isotope experiments with simultaneous H⁺-D⁺ irradiation of graphite led to the conclusion that thermalized H and D move and recombine on internal surfaces within the implantation zone. In contrast, during H⁺-D⁺ irradiation, methane molecules are formed at the end of range of the incident ions. Combined H⁺ and O⁺ irradiation of graphite leads to the formation of hydrocarbons, carbon oxides and water, with water being formed at the end of the O⁺ implant range

No abstract available

[en] A new high-energy beam polarimeter is proposed for Nuclotron, which uses the Internal Target Station (ITS). This polarimeter based on a measurement of asymmetry for the d–p elastic scattering will allow one to measure simultaneously both vector and tensor components of deuteron beam polarization. For this purpose an analyzing powers measurement for the d–p elastic scattering at energies T_d = 0.88–2 GeV is proposed. The precise measurements of the deuteron analyzing powers over the energy range T_d = 300–2000 MeV can give an irreplaceable clue to the study of the spin dependence of three nucleon forces.

[en] The problem of which coefficients are adequate to correctly represent the spin rotation in vector spin tracking for polarized proton and deuteron beams in synchrotrons is here re-examined in the light of recent discussions. The main aim of this note is to show where some previous erroneous results originated and how to code spin rotation in a tracking code. Some analysis of a recent experiment is presented that confirm the correctness of the assumptions

[en] A paradox connected with the detection of a pair of similar particles arisin-o at the luminescence of two similaK atoms or at the decay of similar heavy resonances has been analysed. The properties of interference of slow similar π-mesons generated in collisions of relativistic deuterons with nuclei are discussed. It is shown that on this basis the study of degree of independence of interactions of each nucleon, being a part of a deuteron, is possible