Comptel Observations of X-Ray Binaries

Iyudin, A. F.

doi:10.1017/s0252921100038859

Cited by 2 publications

(2 citation statements)

References 6 publications

(6 reference statements)

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“…COMPTEL became the first Compton telescope to orbit Earth [21][22][23][24][25]. Due to their detection application, Compton cameras are being developed in astrophysics [26].…”

Section: Introductionmentioning

confidence: 99%

Design and simulation of a semiconductor detector-based Compton imaging system with efficiency analysis

Niknami

Hosseini

Loushab

2023

Preprint

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In recent years, Compton cameras that use electronic collimators have become common. One or more scatterer detectors and an absorber detector make up the Compton camera, which is sensitive to the energy and location of scattered gamma rays. It predicts the distribution of gamma-ray sources by reflecting all valid events in the image space using conical surfaces. Compton cameras are designed for specific applications and image reconstruction using various methods. Based on studies on the efficiency of the Compton camera, the current work provides a novel detector design that includes scatterer and absorber detectors. This design includes eight scatterer detectors spaced 1 mm apart and an absorber detector 30 mm from the last scatterer detector. The distance between the source and the first scatterer detector was 5 mm. The scatterer and absorber detector plates were 70x70x2.125mm3 and 70x70x10mm3, respectively. The Compton imaging system is simulated using the GEANT4 toolkit. In addition, this study uses an analytical method to reconstruct Compton camera images. The method used for analytical reconstruction in the Compton imaging system differs slightly from simple restoration methods used in other imaging systems. In the analytical method, the equation related to the data reflected by the image must be solved to reconstruct the image directly. This method, the C + + code was developed to reconstruct Compton camera images. According to the results, using the analytical method to identify the best circumstances and the parameters impacting efficiency, the value of FWHM achieved was 3.7 mm with an angular uncertainty of about 2.7 at an energy of 0.662 MeV. Furthermore, the FWHM value decreased by 0.7 mm, compared to another (experimental) design that employed the analytical image reconstruction approach.

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“…COMPTEL became the first Compton telescope to orbit Earth [21][22][23][24][25]. Due to their detection application, Compton cameras are being developed in astrophysics [26].…”

Section: Introductionmentioning

confidence: 99%

Design and simulation of a semiconductor detector-based Compton imaging system with efficiency analysis

Niknami

Hosseini

Loushab

2023

Preprint

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“…It was later developed in 1961 and 1964 as the Compton telescope and Compton spectrometer, respectively [19,20]. The first Compton telescope to orbit Earth, COMPTEL, was launched in 1991 [21][22][23][24][25]. Researchers are developing Compton cameras for various astrophysical applications because of their detection capabilities [26].…”

Section: Introductionmentioning

confidence: 99%

Design and Simulation of a Semiconductor Detector-Based Compton Imaging System with Efficiency Analysis

Niknami,

Hosseini,

Ebrahimi Loushab

2023

Preprint

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Compton cameras detect scattered gamma rays and estimate the distribution of gamma-ray sources. Nonetheless, crafting a camera tailored to a specific application presents formidable challenges, often necessitating the implementation of diverse image reconstruction techniques. Delving into the factors influencing these cameras can pave the way for design optimization and performance enhancement. This study introduces an inventive detector design for Compton imaging systems, building upon the achievements of prior designs. The proposed system contains eight scatterer detectors and a semiconductor absorber detector, spaced at 1 mm and 30 mm intervals, respectively. The source-to-first-scatterer-detector distance is 5 mm, with scatterer and absorber detector plates measuring 70× 70× 2.125 mm3 and 70× 70× 10 mm3, respectively. Geant4 simulation toolkit models the Compton imaging system, and an analytical method reconstructs Compton camera images. Unlike more straightforward techniques, the analytical method directly reconstructs Compton camera images by solving the equation relating to the reflected image data. This approach is implemented in the C++ programming language. The study's findings reveal that the analytical method discerns optimal conditions and parameters that significantly influence efficiency, yielding a full width at half maximum (FWHM) of 3.7 mm with an angular uncertainty of approximately 2.7 degrees at an energy level of 0.662 MeV. Compared to another experimental design employing the analytical image reconstruction approach, the FWHM value decreased by 0.7 mm. This study presents an innovative detector design and an analytical reconstruction method for Compton imaging systems, showcasing improved efficiency and accuracy.

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Comptel Observations of X-Ray Binaries

Cited by 2 publications

References 6 publications

Design and simulation of a semiconductor detector-based Compton imaging system with efficiency analysis

Design and simulation of a semiconductor detector-based Compton imaging system with efficiency analysis

Design and Simulation of a Semiconductor Detector-Based Compton Imaging System with Efficiency Analysis

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