37 research outputs found
A large area position sensitive X-ray detector for astrophysical observations
No full textA large area position sensitive X-ray detector has been developed for use in the coded mask imaging X-ray spectrometer (COMIS) aboard the USSR research module KVANT. The module was launched on March 31, 1987. The detector, having a sensitive area of 256 Ă— 256 mm2, is a sealed multiwire proportional counter filled with Xe gas. It covers the photon energy range 2 to 25 keV. At an energy of 6 keV the achieved position resolution is better than 0.6 mm in the direction parallel to the anode wires. The energy resolution is about 18% at 6 keV.
The paper gives an overview of the development considerations for optimizing performance with respect to linearity and resolution in energy and position response. Results of performance verification are presented
A large area position sensitive X-ray detector for astrophysical observations
No full textA large area position sensitive X-ray detector has been developed for use in the coded mask imaging X-ray spectrometer (COMIS) aboard the USSR research module KVANT. The module was launched on March 31, 1987. The detector, having a sensitive area of 256 Ă— 256 mm2, is a sealed multiwire proportional counter filled with Xe gas. It covers the photon energy range 2 to 25 keV. At an energy of 6 keV the achieved position resolution is better than 0.6 mm in the direction parallel to the anode wires. The energy resolution is about 18% at 6 keV.
The paper gives an overview of the development considerations for optimizing performance with respect to linearity and resolution in energy and position response. Results of performance verification are presented
Imaging spatiotemporal evolution of molecules and active sites in zeolite catalyst during methanol-to-olefins reaction
No full textMapping Metals Incorporation of a Whole Single Catalyst Particle Using Element Specific X-ray Nanotomography
No full textControl of coordinatively unsaturated Zr sites in ZrO2 for efficient C–H bond activation
Get PDFIdentifying active sites and designing rationally heterogeneous catalysts are not inherently straightforward due to their complexity. Here, the authors reveal the nature of active sites for efficient C–H bond activation in C1-C4 alkanes over bare ZrO2 and provide fundamentals for controlling their concentration
