2,041 research outputs found
Recent X-ray hybrid CMOS detector developments and measurements
The Penn State X-ray detector lab, in collaboration with Teledyne Imaging
Sensors (TIS), have progressed their efforts to improve soft X-ray Hybrid CMOS
detector (HCD) technology on multiple fronts. Having newly acquired a Teledyne
cryogenic SIDECAR ASIC for use with HxRG devices, measurements were performed
with an H2RG HCD and the cooled SIDECAR. We report new energy resolution and
read noise measurements, which show a significant improvement over room
temperature SIDECAR operation. Further, in order to meet the demands of future
high-throughput and high spatial resolution X-ray observatories, detectors with
fast readout and small pixel sizes are being developed. We report on
characteristics of new X-ray HCDs with 12.5 micron pitch that include in-pixel
CDS circuitry and crosstalk-eliminating CTIA amplifiers. In addition, PSU and
TIS are developing a new large-scale array Speedster-EXD device. The original
64 x 64 pixel Speedster-EXD prototype used comparators in each pixel to enable
event driven readout with order of magnitude higher effective readout rates,
which will now be implemented in a 550 x 550 pixel device. Finally, the
detector lab is involved in a sounding rocket mission that is slated to fly in
2018 with an off-plane reflection grating array and an H2RG X-ray HCD. We
report on the planned detector configuration for this mission, which will
increase the NASA technology readiness level of X-ray HCDs to TRL 9.Comment: 12 pages, 11 figures, appears in Proc. SPIE 2017. error in reported
detector thickness, changed from 200 microns to 100 micron
Readout of GEM Detectors Using the Medipix2 CMOS Pixel Chip
We have operated a Medipix2 CMOS readout chip, with amplifying, shaping and
charge discriminating front-end electronics integrated on the pixel-level, as a
highly segmented direct charge collecting anode in a three-stage gas electron
multiplier (Triple-GEM) to detect the ionization from Fe X-rays and
electrons from Ru. The device allows to perform moderate energy
spectroscopy measurements (20 % FWHM at 5.9 keV -rays) using only digital
readout and two discriminator thresholds. Being a truly 2D-detector, it allows
to observe individual clusters of minimum ionizing charged particles in
(70:30) and (70:30) mixtures and to achieve excellent
spatial resolution for position reconstruction of primary clusters down to
, based on the binary centroid determination method.Comment: 18 pages, 14 pictures. submitted to Nuclear Instruments and Methods
in Physics Research
A double-sided silicon micro-strip super-module for the ATLAS inner detector upgrade in the high-luminosity LHC
The ATLAS experiment is a general purpose detector aiming to fully exploit the discovery potential of the Large Hadron Collider (LHC) at CERN. It is foreseen that after several years of successful data-taking, the LHC physics programme will be extended in the so-called High-Luminosity LHC, where the instantaneous luminosity will be increased up to 5 Ă 1034 cmâ2 sâ1. For ATLAS, an upgrade scenario will imply the complete replacement of its internal tracker, as the existing detector will not provide the required performance due to the cumulated radiation damage and the increase in the detector occupancy. The current baseline layout for the new ATLAS tracker is an all-silicon-based detector, with pixel sensors in the inner layers and silicon micro-strip detectors at intermediate and outer radii. The super-module is an integration concept proposed for the strip region of the future ATLAS tracker, where double-sided stereo silicon micro-strip modules are assembled into a low-mass local support structure. An electrical super-module prototype for eight double-sided strip modules has been constructed. The aim is to exercise the multi-module readout chain and to investigate the noise performance of such a system. In this paper, the main components of the current super-module prototype are described and its electrical performance is presented in detail
Infrastructure for Detector Research and Development towards the International Linear Collider
The EUDET-project was launched to create an infrastructure for developing and
testing new and advanced detector technologies to be used at a future linear
collider. The aim was to make possible experimentation and analysis of data for
institutes, which otherwise could not be realized due to lack of resources. The
infrastructure comprised an analysis and software network, and instrumentation
infrastructures for tracking detectors as well as for calorimetry.Comment: 54 pages, 48 picture
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