First demonstration of electron-tracking based Compton imaging in solid-state detectors

Vetter, K.; Chivers, Daniel H.; Plimley, Brian; Coffer, Amy; Aucott, T.; Looker, Quinn

doi:10.1016/j.nima.2011.01.131

Cited by 15 publications

(10 citation statements)

References 7 publications

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“…1. We were able, for the first time, to demonstrate electron-tracking based Compton-imaging in a solid-state detector [5,6]. While this concept has been shown before in gas-based instruments, these detectors are characterized by very low interaction efficiency and low energy resolution, significantly limiting the achievable gamma-ray imaging sensitivity [7].…”

Section: Electron-tracking Based Compton Imagingmentioning

confidence: 98%

Multi-sensor radiation detection, imaging, and fusion

Vetter

2016

Nuclear Instruments and Methods in Physics Research Section A:

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Glenn Knoll was one of the leaders in the field of radiation detection and measurements and shaped this field through his outstanding scientific and technical contributions, as a teacher, his personality, and his textbook. His Radiation Detection and Measurement book guided me in my studies and is now the textbook in my classes in the Department of Nuclear Engineering at UC Berkeley. In the spirit of Glenn, I will provide an overview of our activities at the Berkeley Applied Nuclear Physics Program reflecting some of the breadth of radiation detection technologies and their applications ranging from fundamental studies in physics to biomedical imaging and to nuclear security. I will conclude with a discussion of our Berkeley Radwatch and Resilient Communities activities as a result of the events at the Dai-ichi Nuclear Power Plant in Fukushima, Japan more than 4 years ago.

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Section: Electron-tracking Based Compton Imagingmentioning

confidence: 98%

Multi-sensor radiation detection, imaging, and fusion

Vetter

2016

Nuclear Instruments and Methods in Physics Research Section A:

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“…Then, the incoming gamma-ray direction is constrained on a circle in the sky. If recoiled electron trajectories can be measured additionally, then the gamma-ray direction is constrained on an arc-shaped region [13,14,15]. After an accumulation of many events, the incoming gamma-ray direction can be identified as intersections of the constrained circles or arcs.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of multiple Compton scattering events in MeV gamma-rayCompton telescopes using a physics-based probabilistic model

Yoneda¹,

Odaka²,

Ichinohe³

et al. 2021

Preprint

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Aimed at progress in MeV gamma-ray astronomy which has not yet been well-explored, Compton telescope missions with a variety of detector concepts have been proposed so far. One of the key techniques for these future missions is an event reconstruction algorithm that is able to determine the scattering orders of multiple Compton scattering events and to identify events in which gamma rays escape from the detectors before they deposit all of their energies. We propose a new algorithm that can identify whether the gamma rays escape from the detectors or not, in addition to the scattering order determination. This algorithm also corrects incoming gamma-ray energies for escape events. The developed algorithm is based on the maximum likelihood method, and we present a general formalism of likelihood functions describing physical interactions inside the detector. We also introduce several approximations in the calculation of the likelihood functions for efficient computation. For validation, we have applied the algorithm to simulation data of a Compton telescope using a liquid argon time projection chamber, which is a new type of Compton telescope proposed for the GRAMS mission, and have confirmed that it works successfully for up to 8-hit events. The proposed algorithm can be used for next-generation MeV gamma-ray missions featured by large-volume detectors, e.g., GRAMS and AMEGO.

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“…This approach is realized in gaseous Compton cameras but the detector size has to be large due to the low density, and the energy resolution is limited [6,7]. On the other hand, in semiconductor Compton cameras which have advantages with the high density and the high energy resolution, only the demonstration in the limited conditions is achieved [8].…”

Section: Introductionmentioning

confidence: 99%

Development of Si-CMOS hybrid detectors towards electron tracking based Compton imaging in semiconductor detectors

Yoneda

Watanabe

Ikeda

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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Electron tracking based Compton imaging is a key technique to improve the sensitivity of Compton cameras by measuring the initial direction of recoiled electrons. To realize this technique in semiconductor Compton cameras, we propose a new detector concept, Si-CMOS hybrid detector. It is a Si detector bump-bonded to a CMOS readout integrated circuit to obtain electron trajectory images. To acquire the energy and the event timing, signals from N-side are also read out in this concept. By using an ASIC for the N-side readout, the timing resolution of few µs is achieved. In this paper, we present the results of two prototypes with 20 µm pitch pixels. The images of the recoiled electron trajectories are obtained with them successfully. The energy resolutions (FWHM) are 4.1 keV (CMOS) and 1.4 keV (N-side) at 59.5 keV. In addition, we confirmed that the initial direction of the electron is determined using the reconstruction algorithm based on the graph theory approach. These results show that Si-CMOS hybrid detectors can be used for electron tracking based Compton imaging.

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First demonstration of electron-tracking based Compton imaging in solid-state detectors

Cited by 15 publications

References 7 publications

Multi-sensor radiation detection, imaging, and fusion

Multi-sensor radiation detection, imaging, and fusion

Reconstruction of multiple Compton scattering events in MeV gamma-rayCompton telescopes using a physics-based probabilistic model

Development of Si-CMOS hybrid detectors towards electron tracking based Compton imaging in semiconductor detectors

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