The Polaris-H imaging spectrometer

Wahl, Christopher G.; Kaye, Willy; Wang, Weiyi; Zhang, Feng; Jaworski, Jason M.; King, Alexis; Boucher, Yvan A.; He, Zhong

doi:10.1016/j.nima.2014.12.110

Cited by 141 publications

(65 citation statements)

References 4 publications

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“…Efficiency and imag also reported in [5]. Photopeak efficiency is s Starting in the upper ng measurement metang count rate vs. time otope(s) to image.…”

Section: Performancementioning

confidence: 98%

“…Instead of air circulation, heat is dumped to a central aluminum wall, which is connected to heat fins on the T 978-1-4799-6097-2/14/$31.00 ©2014 IEEE An optical camera on the front of Pola overlay optical and radiation images in the fro of view. A more complete description of the can be found in [5].…”

Section: Hardware Designmentioning

confidence: 99%

“…An "isotope" page allows between isotopes to view these images. thorough overview of the real-time software [5].…”

Section: Software Designmentioning

confidence: 99%

“…If cleaning. aris-H is used to ont 2 of the field e hardware design nformation than a plicate the user image for every ed as a function of output at once, so different isotopes measurements" in ary as it acquires saved for each measurement, the diation image can ime point was of ment, the spectrum real time for each e is detected that collected for that quick switching Again, a more e can be found in ows review of the ements, and time t is shown in Fig. in [5]. It is near geable fraction are similar to that Fig.…”

Section: Performancementioning

confidence: 99%

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Polaris-H measurements and performance

Wahl

Kaye

Wang

et al. 2014

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

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Polaris-H, a compact Compton camera designed by H3D, Inc. has been characterized and tested in field measurements at nuclear power plants. Polaris-H integrates a 3D-position-sensitive pixelated CZT detector (20 mm × 20 mm × 15 mm), associated readout electronics, an embedded computer, a 5-hour battery, and an optical camera all within a portable water-resistant case. The total mass is about 4 kg. Start-up time is 2 minutes. Additionally, there is a connection for a tablet, which displays a real-time gamma-ray spectrum (near 1% FWHM at 662 keV) and isotope-specific images of the radiation distribution in all 4 in real time. The newest design of Polaris-H features the capability to control data acquisition without using a tablet interface, a higher energy dynamic range, and a higher maximum count rate. Absolute efficiency, imaging efficiency, energy resolution, and detection and identification performance are presented. Measurements are shown for applications of decontamination and detection of previously unknown contamination regions.

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“…Efficiency and imag also reported in [5]. Photopeak efficiency is s Starting in the upper ng measurement metang count rate vs. time otope(s) to image.…”

Section: Performancementioning

confidence: 98%

Section: Hardware Designmentioning

confidence: 99%

“…An "isotope" page allows between isotopes to view these images. thorough overview of the real-time software [5].…”

Section: Software Designmentioning

confidence: 99%

Section: Performancementioning

confidence: 99%

See 2 more Smart Citations

Polaris-H measurements and performance

Wahl

Kaye

Wang

et al. 2014

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

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“…[1][2][3][4][5] For more than two decades, cadmium zinc telluride (CZT) with 10% Zn has been the prime candidate for nucleardetector applications operable at room temperature. [6][7][8][9][10][11][12] Its high atomic number, high density, excellent optoelectronic properties and high mobility-lifetime product has made CZT the material of choice for high-resolution X-ray and gamma-ray detectors.…”

Section: Introductionmentioning

confidence: 99%

Assessment of a new ZnO:Al contact to CdZnTe for X- and gamma-ray detector applications

et al. 2017

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The large mismatch of the coefficients of thermal expansion (CTE) between the metal contact and CdZnTe exerts thermal stress at the metal/CZT interface, which causes mechanical degradation of the contact in addition to the poor adhesion of the metallic thin film to CZT. To form a reliable and stable interface, the contact material should have better adhesion and a close match of the coefficients of thermal expansion with CZT/CdTe. Here, we report on our investigations of a novel non-metallic contact layer for use in radiation detector applications. The proposed ZnO:Al contact layer offers better adhesion due to the oxide interface, higher hardness and better matching of the CTE with CZT. It has high prospects for a reliable and stable device structure that can serve as a replacement to the common metallic electrodes used today. We evaluated AZO contacts to CZT and extracted the electronic characteristics, such as resistivity and mobility-lifetime product of electrons, and compared the results of the same characterization measurements for CZT with gold contacts. The present observations showed that the characteristics of CZT detectors with AZO contacts are nearly identical to the same detectors with gold contacts.

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