Proton - Nucleus Interactions at 200-GeV/c

The investigation of interactions of hadrons with the nucleus in recent time became very important, and there is a hope that it can give the information about the systems produced in this process (lifetime, cross sections etc.) The nuclear photoemulsions are a good detector at the investigation of hadron-nucleus interactions due to a high spatial resolution and a possibility of detection of particles nearly at all energies that enables to study the characteristics of both fast and slow particles. The consistence of emulsion enables to obtain the characteristics of interactions both on light (CNO, <A> = 14) and on heavy(Ag,Br,<A> = 94) nuclei

Progress in Development of Kharkov X-Ray Generator Nestor

The sources of the X-rays based on Compton scattering of intense Nd:YAG laser beam on electron beam circulating in a storage ring with beam energy 43-225 MeV is under construction in NSC KIPT. In the paper the progress in development and construction of Kharkov X-ray generator NESTOR is presented. The current status of the main facility system design and development are described. New scheme and main parameters of injection system are presented. The status of power supply system and control system is described. The facility is going to be in operation in the middle of 2007 and generated X-rays flux is expected to be of about 10{sup 13} phot/s

Nichtideale Plasmen - Statistische Physik, Molekulare Dynamik und Anwendungen Abschlussbericht

The project aimed to support a research group in Moscow. The complex processes in dense nonideal plasmas were investigated by methods of molecular dynamics and successfully compared with analytical methods, Several molecular dynamics programs were installed in Berlin. (orig.)Available from TIB Hannover: DtF QN1(74,41) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Distributions of Rapidity Intervals, Jet Ranges and Maximum Rapidity Gaps in Proton - Proton Interactions at 200-GeV/c

The semiinclusive reaction p+p {yields} n charged particles + anything was investigated with nuclear emulsions irradiated with 200 GeV/c protons at the NAL accelerator (Batavia, US). They measured angles {Theta} of all charged particles. In every event particles were ordered on rapidity which was approximated by the value y = -lntg {Theta}lab/2. In every event particles were numbered on increasing the rapidity. Let us consider, for example, distributions of ordered rapidities and distributions of differences of various ordered rapidities and try to make a physical conclusion from the analysis of these distributions

Vertex operator representation of Weyl-Moyal-Fairlie Sin-algebra

SIGLEAvailable from Bonn Univ. (DE). Physikalisches Inst. / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Theoretische Untersuchungen zur Femtosekunden-Laserablation Abschlussbericht

The scientific goal of the project was the modelling of material ablation using ultrashort laser pulses. Within the framework of this project a generalized two-temperature model was developed. A modified version of a computercode was used to calculate ablation rates for several metals. The calculated data show good agreement with experimental values. Furthermore, the temporal dynamics of the surface electron and lattice temperatures was studied for different temperature dependencies of metal characteristics (electron realxation time, heat capacity, thermal conductivity). This allowed to find analytical expressions for ablation laser fluences, which are in good agreement with numerical calculations. Moreover, effects are studied, which are responsible for the fast energy transfer from the electrons to the ion subsystem and lead to a stabilization of the electron heat flux. The possibility of using neural networks to improve the quality of laser-drilled holes was investigated. Overall a scientific collaboration with the russian partner could be established. The financial means were used to improve the infrastructural equipment at P.N. Lebedev Physics Institute to maintain productive groups. (orig.)SIGLEAvailable from TIB Hannover: F98B1919+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Maximal temperature in flux compactifications

Thermal corrections have an important effect on moduli stabilization leading to the existence of a maximal temperature, beyond which the compact dimensions decompactify. In this note, we discuss generality of our earlier analysis and apply it to the case of flux compactifications. The maximal temperature is again found to be controlled by the supersymmetry breaking scale, T_c_r_i_t #propor to# #sq root#(m_3_/_2M_P). (orig.)Available from TIB Hannover: RA 2999(04-216) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman