Abstract. Compton backscattered x-ray source is developed in the energy region of a few hundred keV at Kansai Photon Science Institute of Japan Atomic Energy Agency (KPSI-JAEA). A remarkable feature of the Compton backscattered x-ray source is that the generated x-ray beam is a well-collimated and has a definite polarization property. The Compton backscattered x-ray source at KPSI-JAEA consists...

We report the generation of ultrashort, hard-x-ray pulses from a liquid mercury target irradiated by 5 kHz laser pulses. The new x-ray source is designed for time-resolved x-ray absorption spectroscopy as well as imaging applications. This marks the first laser-driven plasma x-ray source that continuously recycles the target material, facilitating maintenance-free operation. Theoretical calcula...

New observations of the abundances and energy spectra of the isotopes of Mg, Al, and Si from ACE/CRIS are used to extend our previous results on the composition of refractory nuclides in cosmic-ray source material. For the 18 nuclides considered for elements between Mg and Ni, relative source abundances are generally consistent with solar-system values to within 20%. The Fe abundance, taken rel...

discharges. These photons can be generated by stopping 7OkeV electrons by a target made of high z material like tungsten or tantalum. In this contribution we describe the performance of an X-ray generator employing a corona plasma cathode [1]. Electrons can easily be extracted from a plasma on the surface of a dielectric. The plasma is generated by accelerating electrons, emitted from sharp edg...

Today’s sensitive, high-resolution X-ray observations allow the study of populations of X-ray sources, in the luminosity range of Galactic X-ray binaries, in galaxies as distant as 20-30Mpc. The traditional astronomical tools of photometric diagrams and luminosity functions are now applied to these populations, providing a direct probe of the evolved binary component of different stellar popula...

By favoring the L-peak emission over the bremsstrahlung part, direct quasi-monochromatic soft x-ray emission has been obtained with a field emission (FE) x-ray source. The electron impact x-ray setup uses an arrayed cathode of carbon nanopearl FE tips as a stable cold electron source within a vacuum of 10(-6)-10(-7) Torr. The high brightness of the FE e-beam coupled with the array structure of ...

We report the identification of a possible optical counterpart to the super-Eddington X-ray source NGC 5204 X-1. New CHANDRA data shows that the X-ray source is point-like, with a luminosity of 5.2 × 10 erg s (0.5 8 keV). It displays mediumand long-term X-ray variability in observations spanning a period of 20 years. The accurate CHANDRA position allows us to identify a blue optical continuum s...

We report on the discovery of an unresolved X-ray source inside the supernova remnant G315.4-2.3 (RCW 86). The source is located 7 to the Southwest of the geometrical centre and may be close to the actual explosion centre of the supernova, which makes this a candidate for the stellar remnant associated with RCW 86. However, the presence of a possible optical counterpart with V ∼ 14 at 3 from th...

We have detected a transient X-ray source in the M31 bulge through a continuing monitoring campaign with the Chandra ACIS-I camera. The source was detected at R.A.=00:42:33.428± 0.11, Dec.=+41:17:03.37 ± 0.11 in only a single observation taken 2004-May-23. Fortuitous optical HST/ACS imaging of the transient location prior to the X-ray outburst, along with follow-up HST/ACS imaging during and af...