Abstract Highly spin polarized electron beams produced from GaAs photocathodes within DC high voltage photoguns have been critical to many accelerator-based nuclear and particle physics experiments. This chapter describes photoemission GaAs, the main requirements for constructing a source, techniques control measure polarization of beam.

We have finalized the old (1979) results from [11] about enumeration of connected components of moduli or real polarized K3 surfaces. As an application, using recent results of [13] (see also math.AG/0312396), we completely classify real polarized K3 surfaces which are deformations of real hyper-elliptically polarized K3 surfaces. This could be important in some questions, because real hyper-el...

Development of a high intensity, rapidly reversible, polarized electron source to serve as an injector for the Stanford Linear Accelerator is underway. Polarized electrons are obtained by iiluminating negative electron affinity GaAs with circularly polarized light of wavelength corresponding to the band gap. The present status of the project is described. It is anticipated that this source will...

Oscillons are spatially localized, time-periodic, and long-lived configurations that were primarily proposed in scalar field theories with attractive self-interactions. In this paper, we demonstrate oscillons also exist the low-energy effective theory of an interacting massive (real) vector field. We provide two types vanishing orbital angular momentum, approximately spherically symmetric energ...

Abstract State-of-the art of polarized proton, H − ion, D + (D ) and 3 He 2+ ion beam sources are presented. Feasibility studies new techniques in progress at BNL other laboratories. Polarized deuteron beams will be required for the polarization program Dubna NICA collider Electric Dipole Moment experiment. Experiments with a part experimental future Electron Ion Collider.