A gas Xe based scintillation proportional counter with cylindrical geometry and wavelength shifting (WLS) fiber readout for X-rays of energy 0.5 − 100 keV is proposed. With such a design large sizes and sensitive area of the counter with a fairly well uniformity is possible. The counter could be used for ”dark matter” search and neutrino magnetic moment measurement and for detection of small am...

The possible use of a Spherical Proportional Counter for the search neutrinoless double beta decay is investigated in R2D2 R&D project. Dual charge and scintillation light readout may improve detector performance. Tests were carried out with pure argon at 1.1 bar using 6x6 mm2 silicon photomultiplier. Scintillation was used first time to trigger spherical proportional counter. measured drift ex...

We present results from a temporal analysis of the longest and the most sensitive X-ray observations of TV Columbae – a cataclysmic variable classified as an intermediate polar. The observations were carried out with the RossiX − RayT imingExplorer(RXTE) Proportional Counter Array, ROSAT Position Sensitive Proportional Counter, and ASCA. Data were analyzed using a one-dimensional CLEAN and Baye...

We have investigated the response of an argon-methane proportional counter to monochromatic X-rays in the range 99-277 eV . The apparent nonlinearities in mean pulse height as a function of photon energy and the detailed shape of the pulse height distribution for each energy can be predicted quite precisely using the extensive atomic data available for argon. Based on this understanding, we pro...