[en] Hard exclusive processes in high energy electron proton scattering offer the opportunity to get access to a new generation of parton distributions, the so-called generalized parton distributions (GPDs). This functions provide more detailed informations about the structure of the nucleon than the usual PDFs obtained from DIS. In this work we present a detailed analysis of exclusive processes, especially of hard exclusive meson production. We investigated the influence of exclusive produced mesons on the semi-inclusive production of mesons at fixed target experiments like HERMES. Further we give a detailed analysis of higher order corrections (NLO) for the exclusive production of mesons in a very broad range of kinematics. (orig.)

[en] We analyze in detail the size of next-to-leading order corrections to hard exclusive meson production within the collinear factorization approach. Corrections to the cross section are found to be huge at small x_B and substantial in typical fixed-target kinematics. With the models we take for nucleon helicity-flip distributions, the transverse target polarization asymmetry in vector meson production is strongly affected by radiative corrections, except at large x_B. Its overall size is very small for ρ production but can be large in the ω channel. (orig.)

[en] We report on numerical studies of the NLO corrections to exclusive meson electroproduction, both in collider and fixed-target kinematics. Corrections are found to be huge at small x_B and moderate at intermediate or large x_B. (orig.)

[en] We study the evolution behavior of generalized parton distributions at small longitudinal momentum fraction. Particular attention is paid to the ratio of a generalized parton distribution and its forward limit, to the mixing between quarks and gluons, and to the dependence on the squared momentum transfer t. (orig.)

No abstract available

[en] We analyze in detail the size of next-to-leading order corrections to hard exclusive meson production within the collinear factorization approach. Corrections to the cross section are found to be huge at small x_B and substantial in typical fixed-target kinematics. With the models we take for nucleon helicity-flip distributions, the transverse target polarization asymmetry in vector meson production is strongly affected by radiative corrections, except at large x_B. Its overall size is very small for ρ production but can be large in the ω channel. (orig.)

[en] This paper discusses achievements in enabling technology developments for the conductively coupled multi-couple thermoelectric cell being designed by GE for the SP-100 nuclear power reactor. The test results of cell ingradient testing and the correlation to pretest performance predictions are discussed. First of a kind technology developments on the single crystal high voltage insulator and its compatibility with lithium containing system and strain absorbing compliant pads are reported on. The SP-100 thermoelectric cell has been brought to a state of development where its feasibility as the basic power conversion building block for future nuclear space power missions has been firmly established and the key enabling technology issues have been resolved

[en] This paper describes the design of the Thermoelectric Electromagnetic (TEM) pump used in the SP-100 space power system. The TEM pump is designed to pump liquid (molten) lithium (Li) coolant in the Primary Heat Transport Subsystem (PHTS) and Heat Rejection Subsystem (HRSS). The pump utilizes advanced Thermoelectric (TE) cells to generate electric current that induces magnetic flux in a Z-shaped magnetic structure. The electric current and magnetic flux pass through the liquid Li perpendicular to each other to create the pumping force. The TE cells are semiconductors located between rectangular ducts connected to the reactor hot PHTS piping and the cooler HRSS piping. The temperature difference (ΔT) across the TE cells generates the voltage to power the pump. The design provides a minimum mass, self-regulated pump, with no moving parts and self-powered by an internal temperature gradient

[en] We study the evolution behavior of generalized parton distributions at small longitudinal momentum fraction. Particular attention is paid to the ratio of a generalized parton distribution and its forward limit, to the mixing between quarks and gluons, and to the dependence on the squared momentum transfer t

[en] Published in summary form only