Dr. Aleksey E. Bolotnikov Profile

Dr. Aleksey E. Bolotnikov

Physicist at Brookhaven National Lab

SPIE Involvement:

Conference Program Committee | Author

Publications (100)

Proceedings Article | 4 October 2024 Poster + Paper

Peculiarities of CsPbBr3 perovskites melting in quasi-equilibrium conditions

O. Kopach, V. Kopach, P. Fochuk, A. Bolotnikov, R. James

Proceedings Volume 13151, 131510N (2024) https://doi.org/10.1117/12.3027496

KEYWORDS: Solids, Perovskite, Activation energy, Alloys, Crystals, Liquids, Critical temperature, Thermodynamics, Thermal analysis

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Proceedings Article | 4 October 2024 Poster + Paper

Electro-physical properties of surface-barrier diodes on low-resistance n-Cd0.96Mn0.04Te0.96Se0.04 crystals

V. Sklyarchuk, O. Kopach, P. Fochuk, O. Sklyarchuk, A. Bolotnikov, R. James

Proceedings Volume 13151, 131510M (2024) https://doi.org/10.1117/12.3027351

KEYWORDS: Crystals, Diodes, Selenium, Manganese, Sensors, Resistance, Electrons, Absorption

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Proceedings Article | 4 October 2024 Presentation

Performance characterization of 5x5x12 mm3 virtual Frisch-Grid TlBr detectors

Aleksey Bolotnikov, Conner Brown, Gabriella Carini, James Christian, Leonard Cirignano, Connie-Rose Deane, Alfred Dellapenna, Jack Fried, Sven Herrmann, Alireza Kargar, Hadong Kim, Michael Koslowsky, Piotr Maj, Vamshi Manthena, Alexander Miller, Sandeep Miryala, Andrea Norris, Yaroslav Ogorodnik, Giovanni Pinaroli, Eric Raguzin, Martin Smith, Mike Squillante, Joshua Tower, Andrew Valente, Evan Weststrate, Kanai Shah

Proceedings Volume PC13151, PC131510D (2024) https://doi.org/10.1117/12.3029913

KEYWORDS: Sensors, Weapons of mass destruction, Homeland security, System identification, Polarization, Platinum, Ions, Electric field sensors, Detector arrays, Defect detection

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Proceedings Article | 21 August 2024 Poster + Paper

Results from the CsI calorimeter onboard the 2023 ComPair balloon flight

Daniel Shy, Richard Woolf, Clio Sleator, Bernard Phlips, J. Eric Grove, Eric Wulf, Mary Johnson-Rambert, Mitch Davis, Emily Kong, Thomas Caligiure, A. Wilder Crosier, Aleksey Bolotnikov, Nicholas Cannady, Gabriella Carini, Regina Caputo, Jack Fried, Priyarshini Ghosh, Sean Griffin, Elizabeth Hays, Sven Herrmann, Carolyn Kierans, Nicholas Kirschner, Iker Liceaga-Indart, Zachary Metzler, Julie McEnery, John Mitchell, A. Moiseev, Lucas Parker, Alfred Dellapenna, Jeremy Perkins, Makoto Sasaki, Adam Schoenwald, Lucas Smith, Janeth Valverde, Sambid Wasti, Anna Zajczyk

Proceedings Volume 13093, 130937X (2024) https://doi.org/10.1117/12.3020032

KEYWORDS: Balloons, Equipment, Gamma radiation, Silicon photomultipliers, Sensors, Analytical research, Visible radiation, Global Positioning System, Telescopes, Silicon

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Proceedings Article | 21 August 2024 Poster + Paper

The 2023 balloon flight of the ComPair instrument

Lucas Smith, Nicholas Cannady, Regina Caputo, Carolyn Kierans, Nicholas Kirschner, Iker Liceaga-Indart, Julie McEnery, Zachary Metzler, A. Moiseev, Lucas Parker, Jeremy Perkins, Makoto Sasaki, Adam Schoenwald, Daniel Shy, Janeth Valverde, Sambid Wasti, Richard Woolf, Aleksey Bolotnikov, Thomas Caligiure, A. Wilder Crosier, Jack Fried, Priyarshini Ghosh, Sean Griffin, J. Eric Grove, Elizabeth Hays, Emily Kong, John Mitchell, Bernard Phlips, Clio Sleator, D. Thompson, Eric Wulf, Anna Zajczyk

Proceedings Volume 13093, 130937Z (2024) https://doi.org/10.1117/12.3020463

KEYWORDS: Sensors, Equipment, Balloons, Gamma radiation, Data acquisition, Electrons, Compton scattering, Signal detection, Sensor calibration, Scintillators

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Proceedings Article | 3 October 2023 Poster + Paper

Melting and crystallization peculiarities of Cd0.50Mn0.50Te solid solutions

Oleh Kopach, Vasylyna Kopach, Petro Fochuk, A. Bolotnikov, R. James

Proceedings Volume 12696, 126960J (2023) https://doi.org/10.1117/12.2676357

KEYWORDS: Crystallization, Solids, Manganese, Cadmium, Tellurium, Alloys, Temperature metrology, Supercooling, Liquids, Thermal analysis

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Proceedings Article | 3 October 2023 Poster + Paper

CsPbBr3 perovskite single crystals for X- and gamma-radiation detectors

V. Sklyarchuk, P. Fochuk, O. Kopach, A. Bolotnikov, R. James

Proceedings Volume 12696, 126960K (2023) https://doi.org/10.1117/12.2676107

KEYWORDS: Nickel, Crystals, Perovskite, Semiconductors, Resistance, Optical transmission, Chromium

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Proceedings Article | 9 June 2023 Presentation

3D position-sensitive CdZnTe detectors for photon-counting CdZnTe arrays

Aleksey Bolotnikov, Gabriella Carini, Alfred Dellapenna, Jack Fried, Grzegorz Deptuch, Justine Haupt, Sven Herrmann, Piotr Maj, Giovanni Pinaroli

Proceedings Volume PC12570, PC1257007 (2023) https://doi.org/10.1117/12.2670524

KEYWORDS: Photodetectors, Detector arrays, Crystals, Semiconductors, Photon counting, Inhomogeneities, Gamma ray imaging, Gamma ray astronomy, Fabrication, Detector development

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Proceedings Article | 4 October 2022 Poster + Paper

Electrophysical properties of photosensors based on radiation-resistant Hg2MnInTe6 crystals

V. Sklyarchuk, P. Fochuk, V. Pylypko, A. Bolotnikov, R. James

Proceedings Volume 12241, 122410L (2022) https://doi.org/10.1117/12.2632259

KEYWORDS: Crystals, Atomic force microscopy, Photodiodes, Resistance, Nanostructures, Transmittance, Surface finishing, Solids

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Proceedings Article | 3 October 2022 Presentation

Performance characterizations of position-sensitive virtual Frisch-grid TlBr detectors (Conference Presentation)

Aleksey Bolotnikov, Conner Brown, Gabriella Carini, James Christian, Leonard Cirignano, Connie-Rose Deane, Alfred Dellapenna, Grzegorz Deptuch, Jack Fried, Sven Herrmann, Hadong Kim, Giovanni Pinaroli, Alireza Kargar, Martin Koslowsky, Piotr Maj, Victor Manthena, Alexander Miller, Sandeep Miriala, Eric Raguzina, Kanai Shah, Michael Squillante, Martin Smith, Andrew Valente, Evan Weststrate

Proceedings Volume PC12241, PC122410D (2022) https://doi.org/10.1117/12.2635899

KEYWORDS: Sensors, Crystals, Semiconductors, Semiconductor materials, Ions, Gamma radiation, Electric field sensors

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Proceedings Article | 31 August 2022 Presentation + Paper

Development of the balloon-borne Galactic Explorer Coded Aperture Mask and Compton Telescope (GECCO) prototype

Richard Woolf, A. Moiseev, Aleksey Bolotnikov, Nicholas Cannady, Gabriella Carini, John Krizmanic, John Mitchell, Bernard Phlips, Makoto Sasaki, Daniel Shy, Lucas Smith, David Thompson, Eric Yates, Klaus Ziock, Andreas Zoglauer

Proceedings Volume 12181, 121812J (2022) https://doi.org/10.1117/12.2630681

KEYWORDS: Telescopes, Spatial resolution, Sensors, Coded apertures, Prototyping, Crystals, Gamma radiation, Data acquisition, Photomasks

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Proceedings Article | 1 September 2021 Poster + Paper

Radiation resistance of Hg3In2Te6 near-infrared photodiodes

V. Skliarchuk, P. Fochuk, A. Bolotnikov, R. James

Proceedings Volume 11838, 118381B (2021) https://doi.org/10.1117/12.2595844

KEYWORDS: Photodiodes, Photodetectors, Ionizing radiation, Resistance, Indium, Crystals, Chromium, Tellurium, Metals, Nickel

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Proceedings Article | 1 September 2021 Poster + Paper

Thermodynamics and crystal growth of Cd1-x-yMnxZnyTe (x=0.10, 0.20, y=0.15)

V. Kopach, O. Kopach, L. Shcherbak, P. Fochuk, A. E. Bolotnikov, R. James

Proceedings Volume 11838, 1183819 (2021) https://doi.org/10.1117/12.2594545

KEYWORDS: Manganese, Zinc, Tellurium, Cadmium, Crystals, Solids, Thermodynamics, Semiconductors, Thermal analysis

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Proceedings Article | 1 September 2021 Poster + Paper

High radiation resistant crystals for x-ray and γ-radiation detectors

V. Sklyarchuk, P. Fochuk, A. Bolotnikov, R. James, Z. Zakharuk

Proceedings Volume 11838, 1183817 (2021) https://doi.org/10.1117/12.2594082

KEYWORDS: Crystals, Mercury, Resistance, Sensors, Tellurium, Semiconductors, X-rays, X-ray detectors, Electrons, Optical testing

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Proceedings Article | 1 August 2021 Presentation

Arrays of position-sensitive Frisch-grid CdZnTe detectors for gamma ray imaging

Aleksey Bolotnikov, Gabriella Carini, Alfred Dellapenna, Jack Fried, Grzegorz Deptuch, Justine Haupt, Sven Herrmann, Ralph James, Alexander Moiseev, Giovanni Pinaroli, Makoto Sasaki, Eric Yates

Proceedings Volume 11838, 1183803 (2021) https://doi.org/10.1117/12.2596696

KEYWORDS: Sensors, Gamma ray imaging, Imaging arrays, Signal detection, Sensor performance, Detector arrays, Spectroscopy, Space telescopes, Prototyping, Gamma-ray astronomy

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Proceedings Article | 20 August 2020 Poster

Characterization of laser epitaxial layers and heterostructures on the base of CdTe and Cd1-xMnxTe crystals

Viсtor Strebezhev, Petro Fochuk, Olena Maslyanchuk, Ivan Yuriychuk, Victoria Pylypko, Volodymyr Strebezhev, Sergiy Nichyi, Aleksey Bolotnikov, Ralph James

Proceedings Volume 11494, 114941E (2020) https://doi.org/10.1117/12.2569534

KEYWORDS: Laser crystals, Crystals, Heterojunctions, Sensors, Transparency, Laser therapeutics, Electronics, Semiconductors, Laser applications, Epitaxy

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Proceedings Article | 20 August 2020 Poster + Paper

The effect of laser treatment on the morphology of graphene/CdTe x-ray and γ-ray detectors

Olena Maslyanchuk, Viktor Strebezhev, Petro Fochuk, Ihor Fodchuk, Mykola Sorokatyi, Aleksey Bolotnikov, R. James

Proceedings Volume 11494, 1149418 (2020) https://doi.org/10.1117/12.2570634

KEYWORDS: Crystals, Graphene, Sensors, Multilayers, X-ray detectors, Resistance

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Proceedings Article | 17 September 2019 Presentation

Evolution of dislocation/stacking fault defects during two-step annealing (Conference Presentation)

Kihyun Kim, Eunhye Kim, Yonghoon Kim, Beomjun Park, Aleksey Bolotnikov, Ralph James

Proceedings Volume 11114, 1111403 (2019) https://doi.org/10.1117/12.2531675

KEYWORDS: Annealing, Tellurium, Transmission electron microscopy, Cadmium, Sensors, Backscatter

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Proceedings Article | 9 September 2019 Paper

High temperature Hall-effect investigations of Cd0.85Mn0.10Zn0.05Te crystals

V. Kopach, O. Kopach, A. Kanak, L. Shcherbak, P. Fochuk, A. Bolotnikov, R. James

Proceedings Volume 11114, 111141P (2019) https://doi.org/10.1117/12.2529066

KEYWORDS: Cadmium, Zinc, Manganese, Tellurium, Crystals, Temperature metrology, Indium, Annealing, Control systems, Magnetic semiconductors

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Proceedings Article | 9 September 2019 Paper

Mechanisms contributing to dark current across metal/CdMnTe/metal structures

V. Sklyarchuk, P. Fochuk, S. Solodin, Z. Zakharuk, A. Rarenko, A. Bolotnikov, R. James

Proceedings Volume 11114, 111141V (2019) https://doi.org/10.1117/12.2530444

KEYWORDS: Crystals, Tellurium, Optical testing, Resistance, Metals

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Proceedings Article | 9 September 2019 Paper

Ab initio GGA+U investigations of the structural, electronic, and magnetic properties of Cd1-xMnxTe alloy

I. Yuriychuk, P. Fochuk, A. Bolotnikov, R. James

Proceedings Volume 11114, 111141Q (2019) https://doi.org/10.1117/12.2529263

KEYWORDS: Manganese, Tellurium, Cadmium, Magnetism, Ferromagnetics, Chemical species, Magnetic semiconductors, Ions, Crystals, Electrons

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Proceedings Article | 9 September 2019 Presentation

Position-sensitive Frisch-grid CdZnTe detectors for gamma-ray spectroscopy and imaging (Conference Presentation)

Aleksey Bolotnikov, Giuseppe Camarda, Gianluidgi De Geronimo, Anwar Hossain, Luis Ocampo Giraldo, Ge Yang, Ralph James

Proceedings Volume 11114, 111140S (2019) https://doi.org/10.1117/12.2528317

KEYWORDS: Sensors, Imaging spectroscopy, Gamma radiation, Spectroscopy, Calibration, Gamma ray imaging, Crystals, Spectral resolution, Image resolution, Prototyping

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Recently we evaluated spectral performance of virtual Frisch-grid (VFG) CdZnTe (CZT) detectors which offer an economical and robust design for high-efficiency detectors for gamma spectroscopy and imaging. We developed and tested several arrays prototypes coupled to a front-end ASIC. Each detector in the array module operates as a mini time-projection chamber offering high energy and position resolution. Previously we reported high-energy resolution of <0.9% FWHM at 662 keV achieved with the individual detectors and the whole arrays. We employ learning algorithms based on extensive detector calibrations to reconstruct positional information and use this information to correct detectors’ response non-uniformities due to the presence of crystal defects and enhance the spectral resolution of the array. In this work, we evaluated the position resolution achievable with virtual Frisch-grid CZT detectors, which is important for making high-resolution imaging instruments. Based on our measurements, we conclude that <100-micron resolution is achievable with these detectors on a small scale. However, it would require very accurate calibrations to ensure such resolution for the entire detector’s volume due to local variations of the electric field. High spectral and position resolution of position-sensitive virtual Frisch-grid CZT detectors make them attractive for a variety of applications including gamma-ray astronomy, medical and industrial imaging, environmental cleanup, nuclear safeguards and security. The arrays consisted of VFG detectors fabricated from 6x6x20 or 5x7x25 mm3 CZT crystals acquired from Redlen, Inc. The detectors have a simple design. Each crystal, furnished with two gold contacts on the top and bottom surfaces (the anode and the cathode) is encapsulated inside the ultra-thin polyester shell for electrical insulation and mechanical protection of the detector as we previously described. The shell tightly envelops the crystal and holds in place two CuBe flat-spring contacts on the cathode and the anode faces. 4.5-mm wide pads, cut from copper adhesive foil, are attached over the shell near the anode side. The detectors were placed vertically on the detector board and gently pressed from the top using the cathode board having the decoupling capacitors and resistors. The anode spring contacts touch the designated anode pads on the board, while the charge-sensing pads were soldered to the board contacts. The signals generated by the incident photons on the anodes, cathodes and 4 position-sensing pads were routed to the corresponding front ASIC inputs (charge-sensitive preamplifiers). The decoupling circuitries are required for reading the signals from cathodes, which were biased at 2500-3000 V. The ASIC used in these measurements allowed us to capture the signals from individual cathodes, anodes and pads. To calculate the normalized X and Y coordinates, we used the center of gravity method. For the Z coordinate we used the C/A ratio. As we described it previously, this approximation is sufficient to for correcting the response non-uniformity. The measured XYZ values constitute a configuration space, which correlates to the spatial variations in the measured anode signals. Thus, by segmenting the XYZ space into small voxels we sort out the signals corresponding to each of them and apply correction accordingly using a 3-dimensional correction matrix (CM) generated during calibration. For comparison purposes, we also apply drift-time corrections, along the Z direction, which are called 1D correction. The detectors calibration was done for several temperatures and using several gamma ray lines. For calibration we collected the pulse-height spectra from known gamma ray sources and use them to evaluate the channels’ baselines, gains and the 3D correction matrixes for each detector.

Proceedings Article | 13 May 2019 Presentation

Mini gamma camera based on photon-counting Frisch-grid CdZnTe detectors (Conference Presentation)

Aleksey Bolotnikov, Giuseppe Camarda, Gianluigi De Geronimo, Anwar Hossain, Luis Ocampo Giraldo, Ge Yang, Ralph James

Proceedings Volume 11027, 110270G (2019) https://doi.org/10.1117/12.2520151

KEYWORDS: Sensors, Cameras, Photodetectors, Imaging spectroscopy, Gamma radiation, Crystals, Spectroscopy, Gamma-ray astronomy, Medical imaging, Information security

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Proceedings Article | 18 September 2018 Presentation

4x4 array of position-sensitive virtual Frisch-grid CdZnTe detectors for imaging and spectroscopy of gamma-ray sources (Conference Presentation)

Aleksey Bolotnikov, Giuseppe Camarda, Gianluigi De Geronimo, Jack Fried, Diedra Hodges, Anwar Hossain, Luis Ocampo, Ge Yang, Emerson Vernon, Ralph Jamese

Proceedings Volume 10762, 107620M (2018) https://doi.org/10.1117/12.2323492

KEYWORDS: Imaging spectroscopy, Sensors, Gamma radiation, Image sensors, Spectroscopy, Crystals, Spectroscopes, Cameras, Gamma-ray astronomy, Medical imaging

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Proceedings Article | 13 September 2018 Paper

Properties of Cd0.90-xMnxZn0.10Te (x = 0.10, 0.20) crystals grown by Vertical Bridgman method

V. Kopach, O. Kopach, A. Kanak, L. Shcherbak, P. Fochuk, A. Bolotnikov, R. James

Proceedings Volume 10762, 1076212 (2018) https://doi.org/10.1117/12.2320676

KEYWORDS: Crystals, Tellurium, Manganese, Cadmium, Zinc, Semiconducting wafers, Quartz, Carbon, Temperature metrology, Crystallography

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Proceedings Article | 3 October 2017 Presentation

Arrays of position sensitive virtual Frisch-grid detectors (Conference Presentation)

Aleksey Bolotnikov, Giuseppe Camarda, Rubi Gul, Gianluigi De Geronimo, Jack Fried, Ge Yang, Anwar Hossain, Luis Ocampo Giraldo, Emerson Vernon, Ralph James

Proceedings Volume 10392, 103920P (2017) https://doi.org/10.1117/12.2275966

KEYWORDS: Sensors, Gamma radiation, Gamma ray imaging, Crystals, Energy efficiency, Cameras, Prototyping, Semiconductor materials, Hard x-rays, Electronics

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Proceedings Article | 19 September 2017 Presentation

Sub-pixel resolution in pixelated CdZnTe gamma ray detectors with different pixel sizes (0.5 mm to 1.72 mm) using a focused laser beam (Conference Presentation)

Luis Ocampo Giraldo, Aleksey Bolotnikov, Giuseppe Camarda, Gianluigi De Geronimo, Rubi Gul, Jack Fried, Anwar Hossain, Kenan Unlu, Emerson Vernon, Ge Yang, Ralph James

Proceedings Volume 10392, 103920V (2017) https://doi.org/10.1117/12.2275429

KEYWORDS: Sensors, Image resolution, Gamma radiation, Signal processing, Spatial resolution, Crystals, Cadmium, Zinc, Electronics, Sensor performance

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Proceedings Article | 29 August 2017 Paper

Vertical Bridgman growth and characterization of Cd0.95-xMnxZn0.05Te (x=0.20, 0.30) single-crystal ingots

V. Kopach, O. Kopach, L. Shcherbak, P. Fochuk, Svitlana Filonenko, A. Bolotnikov, R. James

Proceedings Volume 10392, 1039214 (2017) https://doi.org/10.1117/12.2271767

KEYWORDS: Crystals, Cadmium, Thermal analysis, Solids, Optoelectronics, Zinc

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Proceedings Article | 8 June 2017 Presentation

Achieving subpixel resolution with time-correlated transient signals in pixelated CdZnTe gamma-ray sensors using a focused laser beam (Conference Presentation)

Luis Ocampo Giraldo, Aleksey Bolotnikov, Giuseppe Camarda, Yonggang Cui, Gianluigi De Geronimo, Rubi Gul, Jack Fried, Anwar Hossain, Kenan Unlu, Emerson Vernon, Ge Yang, Ralph James

Proceedings Volume 10229, 1022907 (2017) https://doi.org/10.1117/12.2264615

KEYWORDS: Sensors, Image resolution, Crystals, Signal processing, Gamma radiation, Cadmium, Zinc, Electronics, Sensor performance, Signal detection

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Proceedings Article | 2 November 2016 Presentation

Feasibility study of a position-sensitive hemispheric CZT radiation detector (Conference Presentation)

Anwar Hossain, Aleksey Bolotnikov, Giuseppe Camarda, Yonggang Cui, Rubi Gul, Utpal Roy, Ge Yang, Ralph James

Proceedings Volume 9968, 996814 (2016) https://doi.org/10.1117/12.2240001

KEYWORDS: Sensors, Electrodes, 3D metrology, Data acquisition, Crystals, Germanium, Hard x-rays, Gamma radiation, Physics, Current controlled current source

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Proceedings Article | 2 November 2016 Presentation

Using the TOF method to measure the electron lifetime in long-drift CdZnTe detectors (Conference Presentation)

Aleksey Bolotnikov, Giuseppe Camarda, Eric Chen, Yonggang Cui, Rubi Gul, Václav Dedic, Gianluigi De Geronimo, Jack Fried, Anwar Hossain, Jason MacKenzie, Paul Sellin, Saeid Taherion, Emerson Vernon, Ge Yang, Uri El-hanany, Ralph James

Proceedings Volume 9968, 996812 (2016) https://doi.org/10.1117/12.2240091

KEYWORDS: Sensors, Crystals, Electric field sensors, Noble gases, Germanium, Hard x-rays, Gamma radiation, Physics, Current controlled current source

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Proceedings Article | 2 November 2016 Presentation

Measurements on semiconductor and scintillator detectors at the Advanced Light Source (Conference Presentation)

Giuseppe Camarda, Aleksey Bolotnikov, Yonggang Cui, Rubi Gul, Anwar Hossain, Utpal Roy, Ge Yang, Ralph James, Peter Vanier

Proceedings Volume 9968, 996810 (2016) https://doi.org/10.1117/12.2240169

KEYWORDS: Scintillators, Semiconductors, Sensors, Light sources, X-ray detectors, X-ray diffraction, Visualization, Germanium, Hard x-rays, Gamma radiation

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Proceedings Article | 2 November 2016 Presentation

Point defects in Cd1-xZnxTe1-ySey crystals grown by using Bridgman growth and traveling heater method (Conference Presentation)

Rubi Gul, Aleksey Bolotnikov, Giuseppe Camarda, Yonggang Cui, Stephen Egarievwe, Anwar Hossain, Utpal Roy, Ge Yang, Ralph James

Proceedings Volume 9968, 996815 (2016) https://doi.org/10.1117/12.2240318

KEYWORDS: Sensors, Crystals, Electrons, Germanium, Hard x-rays, Gamma radiation, Physics, Current controlled current source

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Proceedings Article | 2 November 2016 Presentation

Identification of dopant-induced point defects and their effect on the performance of CZT detectors (Conference Presentation)

Rubi Gul, Aleksey Bolotnikov, Giuseppe Camarda, Yonggang Cui, Václav Didic, Stephen Egarievwe, Anwar Hossain, Utpal Roy, Ge Yang, Ralph James

Proceedings Volume 9968, 996818 (2016) https://doi.org/10.1117/12.2240331

KEYWORDS: Sensors, Indium, Crystals, Spectroscopy, Sensor performance, Compound semiconductors, Gamma radiation, Electric field sensors, Germanium, Hard x-rays

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Proceedings Article | 4 September 2015 Paper

Influence of the thickness of a crystal on the electrical characteristics of Cd(Zn)Te detectors

V. Sklyarchuk, P. Fochuk, I. Rarenko, Z. Zakharuk, O. Sklyarchuk, A. Bolotnikov, R. James

Proceedings Volume 9593, 959319 (2015) https://doi.org/10.1117/12.2187478

KEYWORDS: Crystals, Sensors, Resistance, Indium, Solids, Metals, Semiconductors, Electric field sensors, X-ray detectors, X-rays

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Proceedings Article | 26 August 2015 Paper

Regularities in the melting and crystallization of CdTe-Al alloys

A. Kanak, O. Kopach, P. Fochuk, L. Shcherbak, I. Nakonechnyi, A. Bolotnikov, R. James

Proceedings Volume 9593, 95931B (2015) https://doi.org/10.1117/12.2187488

KEYWORDS: Aluminum, Crystals, Solid state physics, Solids, Thermal analysis, Homogenization, Liquids, Doping, Chemical species, Sensors

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Proceedings Article | 26 August 2015 Paper

Response function of planar Cd(Zn)Te detectors to beta radiation

Alexandr Zakharchenko, Alexandr Rybka, Leonid Davydov, Vladimir Kutny, Manap Khazhmuradov, Petro Fochuk, Aleksey Bolotnikov, Ralph James

Proceedings Volume 9593, 959318 (2015) https://doi.org/10.1117/12.2187202

KEYWORDS: Sensors, Optical filters, Monte Carlo methods, Lead, Gamma radiation, Aluminum, Amplifiers, Strontium, Calibration, Spectroscopy

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Proceedings Article | 17 September 2014 Paper

Characterization of cadmium manganese telluride (Cd1-xMnxTe) crystals grown by floating zone method

A. Hossain, G. Gu, A. Bolotnikov, G. Camarda, Y. Cui, R. Gul, U. Roy, G. Yang, T. Liu, R. Zhong, J. Schneeloch, R. James

Proceedings Volume 9213, 92131N (2014) https://doi.org/10.1117/12.2063357

KEYWORDS: Crystals, Sensors, Tellurium, Manganese, Semiconducting wafers, Cadmium, Gamma radiation, Etching, X-rays, X-ray detectors

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Proceedings Article | 5 September 2014 Paper

Purification of p-type CdTe crystals by thermal treatment

P. Fochuk, I. Rarenko, Z. Zakharuk, Ye. Nykoniuk, V. Shlyakhovyj, A. Bolotnikov, Ge Yang, R. James

Proceedings Volume 9213, 92131H (2014) https://doi.org/10.1117/12.2062763

KEYWORDS: Crystals, Cadmium, Tellurium, Diffusion, Annealing, Scattering, Infrared radiation, Infrared imaging, Aluminum, Chlorine

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Proceedings Article | 5 September 2014 Paper

Spectroscopic response of Cd(Zn)Te radiation detectors with a Schottky diode

Alexandr Zakharchenko, Leonid Davydov, Anna Skrypnyk, Alexandr Rybka, Vladimir Kutny, Manap Khazhmuradov, Petro Fochuk, Valery Sklyarchuk, Aleksey Bolotnikov, Ralph James

Proceedings Volume 9213, 92131C (2014) https://doi.org/10.1117/12.2060403

KEYWORDS: Sensors, Gamma radiation, Spectroscopy, Diodes, Energy efficiency, Monte Carlo methods, Physics, Computer simulations, Computer programming, Semiconductor materials

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Proceedings Article | 5 September 2014 Paper

CdTexSe1-x: a potential candidate for room-temperature radiation detector applications

U. Roy, A. Bolotnikov, G. Camarda, Y. Cui, A. Hossain, G. Yang, R. Tappero, R. James

Proceedings Volume 9213, 92130F (2014) https://doi.org/10.1117/12.2063174

KEYWORDS: Selenium, Crystals, Sensors, Semiconducting wafers, Tellurium, Zinc, Quartz, X-rays, Single crystal X-ray diffraction, Image transmission

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Proceedings Article | 5 September 2014 Paper

Mechanisms of the passage of dark currents through Cd(Zn)Te semi-insulating crystals

V. Sklyarchuk, P. Fochuk, I. Rarenko, Z. Zakharuk, O. Sklyarchuk, Ye. Nykoniuk, A. Rybka, V. Kutny, A. Bolotnikov, R. James

Proceedings Volume 9213, 92131G (2014) https://doi.org/10.1117/12.2062754

KEYWORDS: Crystals, Sensors, Semiconductors, Absorption, Electrons, Chromium, Tellurium, Indium, Zinc, Crystallography

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Proceedings Article | 26 September 2013 Paper

Growth and characterization of CdTeSe for room-temperature radiation detector applications

U. Roy, A. Bolotnikov, G. Camarda, Y. Cui, A. Hossain, G. Yang, R. James, A. Fauler, M. Fiederle, M. Sowinska, G. Hennard, P. Siffert

Proceedings Volume 8852, 885210 (2013) https://doi.org/10.1117/12.2027081

KEYWORDS: Sensors, Crystals, Electrons, Image transmission, Selenium, Crystallography, X-ray diffraction, Luminescence, Infrared microscopy, Microscopy

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Proceedings Article | 26 September 2013 Paper

The energy dependence of the sensitivity for planar CdZnTe gamma-ray detectors

Alexandr Zakharchenko, Anna Skrypnyk, Manap Khazhmuradov, Alexandr Rybka, Vladimir Kutny, Petro Fochuk, Valery Sklyarchuk, A. Bolotnikov, R. James

Proceedings Volume 8852, 88521B (2013) https://doi.org/10.1117/12.2022593

KEYWORDS: Sensors, Gamma radiation, Monte Carlo methods, Electromagnetism, Absorption, Compton scattering, Calibration, Electrons, Measurement devices, Detection and tracking algorithms

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Proceedings Article | 26 September 2013 Paper

Differential thermal analyses of Cd0.95-xMnxZn0.05Te alloys

V. Kopach, O. Kopach, L. Shcherbak, P. Fochuk, A. Bolotnikov, R. James

Proceedings Volume 8852, 88521D (2013) https://doi.org/10.1117/12.2022837

KEYWORDS: Crystals, Thermal analysis, Supercooling, Solids, Semiconductors, Magnetic semiconductors, Zinc, Magnetism, Manganese, Temperature metrology

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Proceedings Article | 26 September 2013 Paper

Raman analysis of Zn(1-x)Mn(x)Te polycrystalline films

O. Klimov, D. Kurbatov, A. Opanasyuk, V. Kosyak, V. Kopach, P. Fochuk, A. Bolotnikov, R. James

Proceedings Volume 8852, 88521G (2013) https://doi.org/10.1117/12.2023280

KEYWORDS: Raman spectroscopy, Manganese, Solids, Phonons, Thin films, X-rays, Crystals, Zinc, Statistical analysis, X-ray diffraction

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Proceedings Article | 26 September 2013 Paper

Effect of side-surface passivation on the electrical properties of metal-Cd(Zn)Te-metal structures

V. Sklyarchuk, P. Fochuk, Z. Zakharuk, R. Grill, V. Kutny, A. Rybka, D. Nakonechny, A. Zakharchenko, Ye. Nykoniuk, A. Bolotnikov, R. James

Proceedings Volume 8852, 88521I (2013) https://doi.org/10.1117/12.2023879

KEYWORDS: Sensors, Semiconductors, Crystals, Resistance, Electric field sensors, P-type semiconductors, N-type semiconductors, Indium, Surface finishing, Metals

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Proceedings Article | 11 September 2013 Paper

Structural and substructural features of chemically deposited zinc oxide thin films

A. Opanasyuk, T. Berestok, P. Fochuk, A. Bolotnikov, R. James

Proceedings Volume 8823, 88230Q (2013) https://doi.org/10.1117/12.2023238

KEYWORDS: Zinc oxide, Zinc, Thin films, Crystals, X-rays, Reflection, Thin film deposition, X-ray diffraction, Scanning electron microscopy, Scattering

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Proceedings Article | 24 October 2012 Paper

Registration of high-intensity electron and x-ray fields with polycrystalline CVD diamond detectors

L. Davydov, A. Rybka, A. Vierovkin, S. Dudnik, V. Gritsyna, V. Kutny, O. Opalev, V. Shevchenko, I. Shlyahov, V. Strelnitsky, A. Tenishev, V. Uvarov, R. James, A. Bolotnikov, P. Fochuk

Proceedings Volume 8507, 85071N (2012) https://doi.org/10.1117/12.929291

KEYWORDS: Sensors, Signal detection, Diamond, X-rays, X-ray detectors, Chemical vapor deposition, Electron beams, Resistance, Semiconductors, Silicon

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Proceedings Article | 24 October 2012 Paper

Transport properties and spectrometric performances of CdZnTe gamma-ray detectors

Alexandr Zakharchenko, Alexandr Rybka, Vladimir Kutny, Anna Skrypnyk, Manap Khazhmuradov, Petro Fochuk, Aleksey Bolotnikov, Ralph James

Proceedings Volume 8507, 85071I (2012) https://doi.org/10.1117/12.928567

KEYWORDS: Sensors, Spectroscopy, Monte Carlo methods, Gamma radiation, Data modeling, Absorption, Sensor performance, Electron transport, Electroluminescence, Physics

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Proceedings Article | 24 October 2012 Paper

Growth of CZT using additionally zone-refined raw materials

David Knuteson, Andre Berghmans, David Kahler, Brian Wagner, Matthew King, Sean Mclaughlin, Aleksey Bolotnikov, Ralph James, Narsingh Singh

Proceedings Volume 8507, 85070X (2012) https://doi.org/10.1117/12.929982

KEYWORDS: Crystals, Semiconducting wafers, Tellurium, Cadmium, Zinc, Power supplies, Raw materials, Sensors, Switches, Sensor performance

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Proceedings Article | 24 October 2012 Paper

Some structural and optical properties of thin and thick CdTe and CdxMn1-xTe films

A. Opanasyuk, P. Koval, V. Kosyak, P. Fochuk, A. Bolotnikov, R. James

Proceedings Volume 8507, 85071K (2012) https://doi.org/10.1117/12.929017

KEYWORDS: Manganese, Thin films, Crystals, Sensors, Optical properties, X-rays, Solids, Diffraction, Semiconductors, Crystallography

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Proceedings Article | 24 October 2012 Paper

High-temperature treatment of In-doped CZT crystals grown by the high-pressure Bridgman method

P. Fochuk, I. Nakonechnyi, O. Kopach, Ye. Verzhak, O. Panchuk, V. Komar, Igor Terzin, Vladimir Kutnij, A. Rybka, Yevhen Nykoniuk, A. Bolotnikov, G. Camarda, Y. Cui, A. Hossain, K. Kim, G. Yang, R. James

Proceedings Volume 8507, 85071L (2012) https://doi.org/10.1117/12.929035

KEYWORDS: Cadmium, Crystals, Annealing, Indium, Tellurium, Palladium, Resistance, Zinc, Infrared imaging, Chemical species

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Proceedings Article | 16 May 2012 Paper

Characterization of CdZnTe crystals and radiation detectors

J. Butcher, M. Hamade, M. Petryk, A. Bolotnikov, G. Camarda, Y. Cui, R. Gul, A. Hossain, K. Kim, G. Yang, R. James

Proceedings Volume 8358, 83581M (2012) https://doi.org/10.1117/12.916951

KEYWORDS: Sensors, Crystals, Synchrotrons, Light sources, Sensor performance, Polarization, X-ray detectors, X-rays, Spectroscopy

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Proceedings Article | 28 September 2011 Paper

Melting and cooling processes in CdTe-ZnTe near the CdTe-rich side

Larysa Shcherbak, Oleh Kopach, Petro Fochuk, Andriy Kanak, Aleksey Bolotnikov, Ralph James

Proceedings Volume 8142, 81421L (2011) https://doi.org/10.1117/12.897628

KEYWORDS: Crystals, Solids, Supercooling, Semiconductors, Liquids, Thermal analysis, Zinc, Germanium, Tin, Liquid phase epitaxy

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Proceedings Article | 28 September 2011 Paper

Effects of thermal annealing on the structural properties of CdZnTe crystals

G. Yang, A. Bolotnikov, P. Fochuk, Y. Cui, G. Camarda, A. Hossain, K. H. Kim, J. Horace, B. McCall, R. Gul, O. Kopach, S. Egarievwe, R. James

Proceedings Volume 8142, 814217 (2011) https://doi.org/10.1117/12.894961

KEYWORDS: Annealing, Tellurium, Crystals, Infrared imaging, Cadmium, Sensors, Thermal effects, X-ray diffraction, Chemical species, Zinc

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Proceedings Article | 23 September 2011 Paper

Effects of the networks of subgrain boundaries on spectral responses of thick CdZnTe detectors

A. Bolotnikov, J. Butcher, G. Camarda, Y. Cui, S. Egarievwe, P. Fochuk, R. Gul, M. Hamade, A. Hossain, K. Kim, O. Kopach, M. Petryk, B. Raghothamachar, G. Yang, R. James

Proceedings Volume 8142, 814206 (2011) https://doi.org/10.1117/12.896223

KEYWORDS: Sensors, Crystals, X-ray microscopy, X-rays, Clouds, Infrared sensors, Infrared microscopy, Microscopy, X-ray detectors, Tellurium

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Proceedings Article | 23 September 2011 Paper

Hybrid contacts for CZT virtual Frisch-grid detectors

G. Camarda, A. Bolotnikov, W. Chan, Y. Cui, R. Gul, A. Hossain, K. Kim, G. Yang, R. James

Proceedings Volume 8142, 814202 (2011) https://doi.org/10.1117/12.896682

KEYWORDS: Sensors, X-rays, X-ray detectors, Electrodes, Electric field sensors, Metals, Signal attenuation, Crystals, Signal detection, Gamma radiation

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Proceedings Article | 8 September 2011 Paper

Development of CdZnTe radiation detectors

Aleksey Bolotnikov, Giuseppe Camarda, Anwar Hossain, Ki Hyun Kim, Ge Yang, Rubi Gul, Yonggang Cui, Ralph James

Proceedings Volume 8191, 819129 (2011) https://doi.org/10.1117/12.901077

KEYWORDS: Sensors, X-rays, Crystals, Tellurium, Sensor performance, X-ray detectors, Infrared microscopy, Infrared imaging, X-ray imaging, X-ray diffraction

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