XCAT: the JANUS x-ray coded aperture telescope

Falcone, A.; Burrows, D. N.; Barthelmy, S. D.; Chang, Weijun; Fox, D. B.; Fredley, Joseph E.; Gehrels, N.; Kelly, M.; Klar, Robert; Palmer, D. M.; Persyn, Steven C.; Reichard, Karl; Roming, P. W. A.; Seifert, E.; Smith, Robert W.; Wood, Paul; Zugger, Michael E.

doi:10.1117/12.857300

Cited by 6 publications

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“…For missions that require radiation hardness, low power, and fast readout, without the requirement for very low read noise or Fano-limited energy resolution, these hybrid silicon CMOS detectors are already an excellent choice (e.g. JANUS [15]). For missions requiring these advantages, along with less than 4 eread noise and small pixels (e.g.…”

Section: Discussionmentioning

confidence: 99%

Characterization of Si hybrid CMOS detectors for use in the soft x-ray band

et al. 2013

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We report on the characterization of four HAWAII Hybrid Si CMOS detectors (HCD) developed for use as X-ray detectors as part of a joint program between Penn State University and Teledyne Imaging Sensors (TIS). Interpixel capacitive crosstalk (IPC) has been measured for standard H1RG detectors as well as a specially developed H2RG that uses a unique bonding structure. The H2RG shows significant reduction in IPC, as reported by Griffith et al. 2012. Energy resolution at 1.5 & 5.9 keV was measured as well as read noise for each detector. Dark current as a function of temperature is reported from 150 -210 K and dark current figures of merit are estimated for each detector. We also discuss upcoming projects including testing of a new HCD called the Speedster-EXD. This prototype detector will have a low noise, high gain CTIA to reduce IPC and read noise as well as in-pixel CDS and event flagging. In the coming year PSU and TIS will begin work on a project to incorporate CTIA and CDS circuitry into the ROIC of a HAWAII HCD like detector to satisfy the small pixel and high rate needs of future X-ray observatories.

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Section: Discussionmentioning

confidence: 99%

Characterization of Si hybrid CMOS detectors for use in the soft x-ray band

et al. 2013

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“…JANUS [15]). For missions requiring these advantages, along with less than 4 e -read noise and small pixels (e.g.…”

Section: Discussionmentioning

confidence: 99%

Characterization of Si hybrid CMOS detectors for use in the soft X-ray band

Prieskorn

Griffith

Bongiorno

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

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We report on the characterization of four Teledyne Imaging Systems HAWAII Hybrid Si CMOS detectors designed for X-ray detection. Three H1RG detectors were studied along with a specially configured H2RG. Read noise measurements were performed, with the lowest result being 7.1 e -RMS. Interpixel capacitive crosstalk (IPC) was measured for the three H1RGs and for the H2RG. The H1RGs had IPC upper limits of 4.0 -5.5 % (up & down pixels) and 8.7 -9.7 % (left & right pixels), indicating a clear asymmetry. Energy resolution is reported for two X-ray lines, 1.5 & 5.9 keV, at multiple temperatures between 150 -210 K. The best resolution measured at 5.9 keV was 250 eV (4.2 %) at 150 K, with IPC contributing significantly to this measured energy distribution. The H2RG, with a unique configuration designed to decrease the capacitive coupling between ROIC pixels, had an IPC of 1.8 ± 1.0 % indicating a dramatic improvement in IPC with no measurable asymmetry. We also measured dark current as a function of temperature for each detector. For the detector with the lowest dark current, at 150 K, we measured a dark current of 0.020 ± 0.001 (e -sec -1 pix -1 ). There is also a consistent break in the fit to the dark current data for each detector. Above 180 K, all the data can be fit by the product of a power law in temperature and an exponential. Below 180 K the dark current decreases more slowly; a shallow power law or constant must be added to each fit, indicating a different form of dark current is dominant in this temperature regime. Dark current figures of merit at 293 K are estimated from the fit for each detector.

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“…The XCAT is composed of 15 modules each with a FOV of 20 × 20 deg fully coded (Falcone et al 2010). The open grasp is 15.3 cm 2 sr per module.…”

Section: Burst Event Telescope For Alertsmentioning

confidence: 99%

The Gamow Explorer: A Gamma-Ray Burst Mission to Study the High Redshift Universe

White¹

2020

Preprint

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Long Gamma Ray Bursts (LGRBs) can be used to address key questions on the formation of the modern universe including: How does the star formation rate evolve at high redshift? When and how did the intergalactic medium become re-ionized? What processes governed its early chemical enrichment? ALGRB signals when a massive star collapses to form a black hole and in doing so provides an independent tracer of the star formation rate. The LGRB afterglow is a bright back-light to view the host galaxy and intergalactic medium in absorption. The Gamow Explorer will be optimized to search for high redshiftLGRBs, with a z >6 detection rate at least ten times Swift. Furthermore it will go beyond Swift by using the photo-z technique to autonomously identify >80% of z >6 redshift LGRBs to enable rapid follow up by large ground based telescopes and JWST for spectroscopy and host galaxy identification. The Gamow Explorer will be proposed to the 2021 NASA MIDEX opportunity for launch in 2028.

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XCAT: the JANUS x-ray coded aperture telescope

Cited by 6 publications

References 0 publications

Characterization of Si hybrid CMOS detectors for use in the soft x-ray band

Characterization of Si hybrid CMOS detectors for use in the soft x-ray band

Characterization of Si hybrid CMOS detectors for use in the soft X-ray band

The Gamow Explorer: A Gamma-Ray Burst Mission to Study the High Redshift Universe

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