[en] Accurate tracking in inhomogeneous and arbitrarily oriented magnetic fields requires the velocity and direction of the drifting ionization to be known to high precision. A semi-empirical method of calculating drift velocities and magnetic deflection angles is presented for non-perpendicular electric and magnetic fields. Data obtained using a drift chamber rotated in a B-field verify the calculation. The model is used to restore accuracy in the L3 forward/backward muon detector where non-orthogonal and inhomogeneous electric and magnetic fields are present. (orig.)

[en] The decay rate of the proton into two-body channels is calculated in the SU(5) grand unified theory using the hadronic wavefunctions of the bag model. Summing only the two-body modes leads to a lifetime of tausub(p) = 8 x 10³⁰ yr, for a heavy boson mass of 3.8 x 10¹⁴ GeV. (orig.)

[en] Prospects and problems for the application of QCD to hadronic phenomena are discussed. The structure function of nuclei and the strange quark content of the proton are discussed in detail. (orig.)

[en] The EMC effect, concerning quarks and gluons in the nucleus, is reviewed. Kinematics; data and a parton analysis; theoretical ''explanations'' of the EMC effect, including changes of scale and convolution models; are all discussed. (U.K.)

[en] Analytic expressions are derived for the period and amplitude of the energy oscillations associated with nuclear forward glory scattering. It is found that the amplitude increases with energy as Esup(1/4) whereas the period behaves approximately as Esup(3/2)/1n E. Several numerical examples are worked out. (orig.)

[en] The QCD operator product expansion analysis of twist-4 effects in leptoproduction is recast as a parton model. All twist-4 corrections are expressed in terms of a limited number of multiparton (quark and gluon) longitudinal distribution functions in an infinite momentum frame. (orig.)

[en] Starting from a D = 3, N = 4 supersymmetric theory for matter fields, a twist with a Grassmann parity change is defined which maps the theory into a gauge-fixed, abelian BF theory on curved 3-manifolds. After adding surface terms to this theory, the twist is seen to map the resulting supersymmetric action to two uncoupled copies of the gauge-fixed Chern-Simons action. In addition, we give a map which takes the BF and Chern-Simons theories into Donaldson-Witten TQFTs. A similar construction, but with N = 2 supersymmetry, is given in two dimensions. (orig.)

[en] We describe an internal polarized ³He target currently under construction which will be used in several electron storage ring experiments. The target is based on the technique of metastability exchange laser optical pumping, where the polarized atoms flow into a cryogenically-cooled storage cell. This novel technique allows for high precision measurements where the beam interacts with the pure atomic species. Both the HERMES experiment at DESY and the BLAST detector at the MIT Bates Laboratory will use the polarized ³He target in their measurements. Details of the target system, including the provisions needed to incorporate the target into the electron storage ring, are presented. (orig.)

[en] The achievement of large volumetric power losses (dissipation) in the Alcator C-Mod divertor region is demonstrated in two operational modes: radiative divertor and detached divertor. During radiative divertor operation, the fraction of SOL power lost by radiation is P_R/P_SOL∼0.8 with single null plasmas, n_e<2x10²⁰ m^-3 and I_p<1 MA. These plasmas sometimes have very high recycling, with n_e,div≤6x10²⁰ m^-3. As the divertor radiation and density increase, the plasma eventually detaches abruptly from the divertor plates: I_SAT drops at the target and the divertor radiation peak moves to the X-point region. Probe measurements at the divertor plate show that the transition occurs when T_e∼5 eV. The critical n_e for detachment depends linearly on the input power. This abrupt divertor detachment is preceded by a comparatively long period ( similar 1-200 ms) where a partial detachment is observed to grow at the outer divertor plate. ((orig.))

[en] In this review we present a few examples of the physics problems that can be studied in the near future with longitudinally polarized electrons. These involve nuclear spectroscopy, nucleon structure and studies of reaction mechanisms. (orig./HSI)