&lt;title&gt;Development of CdZnTe pixel detectors for astrophysical applications&lt;/title&gt;

Harrison, Fiona A.; Boggs, Steven E.; Bolotnikov, A. E.; Chen, C. M. Hubert; Cook, W. R.; Schindler, S. M.

doi:10.1117/12.407574

Cited by 10 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using our novel bump bonding technology, 22 we connect a CdTe pixel detector with the analog LSI developed in Caltech. 23 The detector has a size of 1.3 × 2.4 cm 2 and a thickness of 0.5 mm, together with a position resolution of 500 µm. Operated at −20 C • with a bias of 100V, the detector shows an energy resolution of 0.96 keV (FWHM) for 60 keV gamma-rays.…”

Section: Current Technological Statusmentioning

confidence: 99%

“…Another typical case is the TeV blazers and SNRs (e.g. 23 ), directly showing the existence of very energetic particles accelerated above 10 12 eV. The GeV electrons should scatter the cosmic microwave background up to 10-100 keV, and the TeV electrons, in the vicinity of its source, should emit synchrotron emission around the energy band from a few to 100 keV.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hard x-ray imager for the NeXT mission

et al. 2006

View full text Add to dashboard Cite

The hard X-ray imager (HXI) is the primary detector of the NeXT mission, proposed to explore high-energy non-thermal phenomena in the universe. Combined with a novel hard X-ray mirror optics, the HXI is designed to provide better than arc-minutes imaging capability with 1 keV level spectroscopy, and more than 30 times higher sensitivity compared with any existing hard X-ray instruments. The base-line design of the HXI is improving to secure high sensitivity. The key is to reduce the detector background as far as possible. Based on the experience of the Suzaku satellite launched in July 2005, the current design has a well-type tight active shield and multi layered, multi material imaging detector made of Si and CdTe. Technology has been under development for a few years so that we have reached the level where a basic detector performance is satisfied. Design tuning to further improve the sensitivity and reliability is on-going.

show abstract

Section: Current Technological Statusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hard x-ray imager for the NeXT mission

et al. 2006

View full text Add to dashboard Cite

show abstract

“…In collaboration with W. R. Cook (Caltech), we have started design studies of a new ASIC for the ProtoEXIST2 detectors and ultimately for the EXIST HET detectors. Combining the long heritage of the ASIC development for the HEFT, RADNET, and STEREO projects, 6,8,9 the new ASIC will allow a proper packaging for the EXIST HET detectors by arranging the input pads in a 2-D array. A 2-D array of input pads allows a direct flip-chip bonding between an ASIC and a crystal.…”

Section: Small Scale Packaging: Asic For Protoexist2mentioning

confidence: 99%

Detector and telescope development for ProtoEXIST and fine beam measurements of spectral response of CZT detectors

et al. 2005

View full text Add to dashboard Cite

We outline our plan to develop ProtoEXIST, a balloon-borne prototype experiment for the Energetic X-ray Imaging Survey Telescope (EXIST) for the Black Hole Finder Probe. EXIST will consist of multiple wide-field hard X-ray coded-aperture telescopes. The current design of the EXIST mission employs two types of telescope systems: high energy telescopes (HETs) using CZT detectors, and low energy telescopes (LETs) using Si detectors. With ProtoEXIST, we will develop and demonstrate the technologies required for the EXIST HETs. As part of our development efforts, we also present recent laboratory measurements of the spectral response and efficiency variation of imaging CZT detectors on a fine scale (~0.5 mm). The preliminary results confirm the need for multi-pixel readouts and small inter-pixel gaps to achieve uniform spectral response and high detection efficiency across detectors.

show abstract

“…CdZnTe detectors, which have the advantages of room temperature operation, high absorption efficiency and high resolution"2, are being employed in hard x-ray and gamma ray astronomical missions such as the SWIFT Burst Alert Telescope (BAT)3, the International Focusing Optics Collaboration for p Crab Sensitivity (InFOCpS)4, the Energetic X-ray Imaging Telescope Experiment (EXCITE)5 and the High Energy Focusing Telescope (HEFT) 6. CdZnTe detectors will also most likely be used on future high energy missions such as the Constellation X-ray Mission (Con-X) Hard X-ray Telescope (HXT)6 and the Energetic X-ray Imaging Survey Telescope (EXIST)5.…”

Section: Introductionmentioning

confidence: 99%

<title>Effect of twin boundaries on the spectroscopic performance of CdZnTe detectors</title>

et al. 2001

View full text Add to dashboard Cite

Most single grains in cadmium zinc telluride (CdZnTe) grown by the high-pressure Bridgman (HPB) technique contain multiple twin boundaries. As a consequence, twin boundaries are one of the most common macroscopic material defects found in large area (400 to 700 mm z) CdZnTe specimens obtained from HPB ingots. Due to the prevalence of twin boundaries, understanding their effect on detector performance is key to the material selection process. Twin boundaries in several 2 mm thick large area specimens were first documented using infrared transmission imaging. These specimens were then fabricated into either 2 mm pixel or planar detectors in order to examine the effect of the twin boundaries on detector performance.Preliminary results show that twin boundaries, which are decorated with tellurium inclusions, produce a reduction in detector efficiency and a degradation in resolution. The extentof the degradation appears to be a function of the density of tellurium inclusions.

show abstract

<title>Development of CdZnTe pixel detectors for astrophysical applications</title>

Cited by 10 publications

References 0 publications

Hard x-ray imager for the NeXT mission

Hard x-ray imager for the NeXT mission

Detector and telescope development for ProtoEXIST and fine beam measurements of spectral response of CZT detectors

<title>Effect of twin boundaries on the spectroscopic performance of CdZnTe detectors</title>

Contact Info

Product

Resources

About