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Imaging in hard X-rays of any astrophysical source with high angular resolution is a challenging job. Shadow-casting technique is one of the most viable options for imaging in hard X-rays. We have used two different types of shadow-casters,…

Instrumentation and Methods for Astrophysics · Physics 2015-03-17 Anuj Nandi , S. Palit , D. Debnath , Sandip K. Chakrabarti , T. B. Kotoch , R. Sarkar , Vipin K. Yadav , V. Girish , A. R. Rao , D. Bhattacharya

Cadmium Zinc Telluride (CZT) detectors are having a major impact on the field of hard X-ray astronomy. Without the need for cryogenic cooling they achieve good spatial and energy resolutions over the broad energy range from 10 keV to 600…

Astrophysics · Physics 2009-11-10 H. Krawczynski , I. Jung , J. Perkins , A. Burger , M. Groza

Phoswich detectors (RT-2/S & RT-2/G) are major scientific payloads of the RT-2 Experiment onboard the CORONAS-PHOTON mission, which was launched into a polar Low Earth Orbit of around 550 km on 2009 January 30. These RT-2 instruments are…

Instrumentation and Methods for Astrophysics · Physics 2010-11-16 Dipak Debnath , Anuj Nandi , A. R. Rao , J. P. Malkar , M. K. Hingar , T. B. Kotoch , S. Sreekumar , V. P. Madhav , Sandip K. Chakrabarti

The Cadmium Zinc Telluride Imager (CZTI) is a high energy, wide-field imaging instrument on AstroSat. CZT's namesake Cadmium Zinc Telluride detectors cover an energy range from 20 keV to > 200 keV, with 11% energy resolution at 60 keV. The…

Cadmium Zinc Telluride (CZT) achieves excellent spatial resolution and good energy resolution over the broad energy range from several keV into the MeV energy range. In this paper we present the results of a systematic study of the…

Astrophysics · Physics 2009-11-11 I. Jung , M. Groza , J. Perkins , H. Krawczynski , A. Burger

We are currently developing Cadmium Zinc Telluride (CZT) detectors for a next-generation space-borne hard X-ray telescope which can follow up on the highly successful NuSTAR (Nuclear Spectroscopic Telescope Array) mission. Since the launch…

Instrumentation and Methods for Astrophysics · Physics 2021-02-09 Jason Tang , Fabian Kislat , Henric Krawczynski

The AstroSat satellite is designed to make multi-waveband observations of astronomical sources and the Cadmium Zinc Telluride Imager (CZTI) instrument of AstroSat covers the hard X-ray band. CZTI has a large area position sensitive hard…

Instrumentation and Methods for Astrophysics · Physics 2021-09-22 A. R. Rao , D. Bhattacharya , V. B. Bhalerao , S. V. Vadawale , S. Sreekumar

RT-2 Experiment (RT - Roentgen Telescope) is a low energy gamma-ray instrument which is designed and developed as a part of Indo-Russian collaborative project of CORONAS-PHOTON Mission to study the Solar flares in wide energy band of…

Instrumentation and Methods for Astrophysics · Physics 2009-12-25 Anuj Nandi , A. R. Rao , Sandip K. Chakrabarti , J. P. Malkar , S. Sreekumar , Dipak Debnath , M. K. Hingar , Tilak Kotoch , Yuri Kotovk , Andrey Arkhangelskiy

The Cadmium Zinc Telluride Imager (CZTI) onboard AstroSat consists of an array of a large number of pixellated CZT detectors capable of measuring the polarization of incident hard X-rays. The polarization measurement capability of CZTI for…

The Cadmium Zinc Telluride Imager (CZTI) onboard AstroSat is designed for hard X-ray imaging and spectroscopy in the energy range of 20 - 100 keV. The CZT detectors are of 5 mm thickness and hence have good efficiency for Compton…

Instrumentation and Methods for Astrophysics · Physics 2021-03-01 Abhay Kumar , Tanmoy Chattopadhyay , Santosh V Vadawale , A. R. Rao , Soumya Gupta , Mithun N. P. S. , Varun Bhalerao , Dipankar Bhattacharya

The main methods grown Cadmium Zinc Telluride (CZT) crystals with high yield and excellent homogeneity are Modified Horizontal Bridgman (MHB) and High Pressure Bridgman (HPB) processes, respectively. In this contribution, the readout system…

Astrophysics · Physics 2008-11-20 Q. Li , A. Garson , P. Dowkontt , J. Martin , M. Beilicke , I. Jung , M. Groza , A. Burger , G. De Geronimo , H. Krawczynski , . , . , . , .

The detector material Cadmium Zinc Telluride (CZT), known for its high resolution over a broad energy range, is produced mainly by two methods: the Modified High-Pressure Bridgman (MHB) and the High-Pressure Bridgman (HPB) process. This…

Astrophysics · Physics 2008-11-26 I. Jung , H. Krawczynski , A. Burger , M. Guo , M. Groza

The MIRAX X-ray observatory, the first Brazilian-led astrophysics space mission, is designed to perform an unprecedented wide-field, wide-band hard X-ray (5-200 keV) survey of Galactic X-ray transient sources. In the current configuration,…

Instrumentation and Methods for Astrophysics · Physics 2015-06-16 Barbara H. G. Rodrigues , Jonathan E. Grindlay , Branden Allen , Jaesub Hong , Scott Barthelmy , Joao Braga , Flavio D'Amico , Richard E. Rothschild

The use of photon counting detection technology has resulted in significant X-ray imaging research interest in recent years. Computed Tomography (CT) scanners can benefit from photon-counting detectors, which are new technology with the…

Instrumentation and Detectors · Physics 2024-01-08 K. Hameed , Rafidah Zainon , Mahbubunnabi Tamal

We describe the results of detailed 3-D Monte Carlo simulations of a "CZT calorimeter" that can be used to detect photons in the keV to several MeV range. Several astrophysics applications require the detection of photons in the energy…

Astrophysics · Physics 2009-11-11 I. Jung , H. Krawczynski , S. Komarov , L. Sobotka

New generation Cadmium Telluride (CZT & CdTe) solid state detectors can provide high quantum efficiency with reasonably good energy resolution and can operate at near room temperature; an unique advantage for space experiments. We present…

Astrophysics · Physics 2009-11-13 J. S. Yadav , S. Savitri , J. P. Malkar

The Cadmium Zinc Telluride Imager (CZTI) onboard AstroSat, an open detector above $\sim$100 keV, is a promising tool for the investigation of hard X-ray characteristics of $\gamma$-ray pulsars. A custom algorithm has been developed to…

High Energy Astrophysical Phenomena · Physics 2022-12-14 K. G. Anusree , Dipankar Bhattacharya , Varun Bhalerao , Akash Anumarlapudi

We report on the design and laboratory testing of a prototype imaging CZT detector intended for balloon flight testing in April 2000. The detector tests several key techniques needed for the construction of large-area CZT arrays, as…

Astrophysics · Physics 2015-06-24 P. F. Bloser , J. E. Grindlay , T. Narita , J. A. Jenkins

One of the key aspects of a detector material for space-borne hard X-ray and gamma-ray telescopes is the rate of prompt and delayed background events generated inside the material by charged and neutral particles striking the detector.…

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