HgI2 detectors fabricated with pixelated anodes were tested as potential room temperature spectrometers. Spectra were obtained with 5 and 10mm thick devices, and their results were compared. The 5mm thick devices showed some effect of the anode weighting potential, while the 10mm thick devices showed the effects of charge diffusion/sharing and electron trapping. A resolution near 1.4% FWHM usin...

The target is cylinder with a length = 7 mm and radius = 5 mm. One face of the cylinder is irradiated with a uranium beam having a particle energy of 400 MeV/u. The beam pulse consists of two bunches, each having a full width at half maximum (FWHM) of 80 ns and the total pule duration is 500 ns. The beam focal spot size (FWHM of the Gaussian power distribution in transverse direction) is assume...

Hard x-ray microscopy with nanometer resolution will open frontiers in the study of materials and devices, environmental sciences, and life sciences by utilizing the unique characterization capabilities of x-rays. Here we report two-dimensional nanofocusing by multilayer Laue lenses (MLLs), a type of diffractive optics that is in principle capable of focusing x-rays to 1 nm. We demonstrate focu...

We developed a powerful UV laser at a central wavelength varying from 260-283 nm. The laser system based on a frequency-trippled Ti:sapphire amplifier delivers mJ pulse energy within a duration of 1-10 ps (fwhm) with 1.5 nm spectral width (fwhm). The system is used to explore thermal emittance and quantum efficiency dependence on photon energy from metallic photocathodes. With pepperpot and sol...

The Hinode X-Ray Telescope provides unprecedented observations of the solar corona in x-rays, due in part to its fine resolution. The x-ray point spread function (PSF) was measured before launch at the NASA X-Ray Calibration Facility to have a FWHM of 0.8 arc-seconds. This paper describes the work to verify the PSF measurements using on-orbit observations of planetary transits and solar eclipse...

We present new near-infrared speckle interferometric observations of the young stellar object Elias 1. The emission is resolved into a narrow east-west elongated blue halo (FWHM about 0. ′′2x1. ′′0) and an unresolved core (FWHM < 0. ′′2). Previously, Kataza and Maihara (1991) had inferred an east-west elongated optically thin disk within which the NIR light is directly scattered. Adding new pie...

A double-layer silicon detector consisting of two 500μm-thick silicon PIN photodiodes with independent readouts was mounted in a vacuum chamber and tested with X-ray sources. The detector is sensitive from 1–30 keV with an effective area of 6 mm. The detector performs best at −35 ◦C with an energy resolution of 220 eV (FWHM, full width at half maximum) at 5.9 keV, and is able to operate at room...

Abstract We combine our dynamical modeling black-hole mass measurements from the Lick AGN Monitoring Project 2016 sample with measured cross-correlation time lags and line widths to recover individual scale factors, f , used in traditional reverberation-mapping analyses. extend by including prior results Code for Reverberation Modeling of Emission Lines ( caramel ) studies that have utilized me...