Two kinds of monochromators covering the energy ranges 100-150 keV and approximately 300 keV have been designed for inelastic (Compton) scattering experiments at the elliptical multipole wiggler beamline, BL08W, of SPring-8. Finite-element analyses using ANSYS for bent crystals indicate that thermal problems are not serious for the 300 keV monochromator, while an energy spread of about 10(-3) f...

We reinvestigate the radio pulsar "death lines" within the framework of two different types of the polar cap acceleration models, i.e., the vacuum gap model and the space-charge-limited flow model, with either curvature radiation or inverse Compton scattering photons as the source of pairs. General relativistic frame dragging is taken into account in both models. We find that the inverse Compto...

Compton gamma-ray imaging is inherently based on the assumption of gamma rays scattering with free electrons. In reality, the non-zero momentum of target electrons bound in atoms blurs this ideal scattering response in a process known as Doppler broadening. The design and understanding of advanced Compton telescopes thus depends critically on the ability to accurately account for Doppler broade...

We investigate the possibility to acquire information on the generalized parton distribution E and, through a model for E, also on the u-quark total angular momentum Ju by studying deeply virtual Compton scattering and hard exclusive ρ electroproduction on a transversely polarized hydrogen target at Hermes. It is found that a change in Ju from zero to 0.4 corresponds to a 4σ (2σ) difference in ...

We are developing Laser Super Cavity for compact X-ray generator based on Inverse Compton Scattering with several tens MeV electron beam. The laser supercavity increases the laser power and makes small laser beam size at the collision point with the electron beam. A FabryPerot cavity as the laser supercavity has been tested at the KEK-ATF (Accelerator Test Facility) and the design for the incre...

We extend previous work on sum rules for the invariant amplitudes of pion Compton scattering by deriving a complete lowest order perturbative spectral function and its leading non perturbative power corrections-for a specific combination of the two helicities (H 1 + H 2) of this process. Using some properties of a modified version of the Borel transform, we develop a method of calculation of th...

We review the current status of resolved X-ray emission associated with extragalactic radio jets and hotspots. The primary question for any particular jet is to decide if the X-rays come from the synchrotron process or from inverse Compton scattering. There is considerable evidence supporting synchrotron emission for knots in the jets of FRI galaxies. For FRII terminal hotspots detected in the ...