Conceptual design of magnetic spectrometer for inverse-Compton X-ray source in MeV region

Tan, Xinjian; Weng, Xiufeng; Zhang, Song; Hei, Dongwei; Li, Binkang; Zhang, Xiaodong; Liu, Jun; Han, Hetong; Zhang, Kan

doi:10.1063/1.4999379

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…As illustrated in Figure 8, the system's detection efficiencies for 1.173 MeV and 1.332 MeV gamma rays were determined to be 1.58 × 10 −7 and 1.86 × 10 −7 , respectively. In comparison, the Compton spectrometer [14,15,23], which also detects MeV-energy gamma rays using Compton electrons, exhibits a detection efficiency of approximately 10 −4 , higher than that of our system. The efficiency discrepancy between the two systems primarily stems from two factors: 1.…”

Section: Evaluation Of Energy Resolution and Detection Efficiencymentioning

confidence: 64%

“…As illustrated in Figure 8 , the system’s detection efficiencies for 1.173 MeV and 1.332 MeV gamma rays were determined to be

and

, respectively. In comparison, the Compton spectrometer [ 14 , 15 , 23 ], which also detects MeV-energy gamma rays using Compton electrons, exhibits a detection efficiency of approximately

, higher than that of our system. The efficiency discrepancy between the two systems primarily stems from two factors: Our system achieves gamma-ray energy-selective imaging by recovering images from Compton electrons, employing a collimator to improve spatial resolution at the expense of some detection efficiency because of electron divergence and energy spread.…”

Section: Resultsmentioning

confidence: 85%

“…The energy-selective imaging system proposed in this study operates on a principle similar to that of a Compton spectrometer [ 14 , 15 , 16 ], both of which are based on Compton scattering. This phenomenon is predominant when MeV gamma photons interact with materials of a low atomic number [ 17 ].…”

Section: Conceptual Designmentioning

confidence: 99%

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Experimental Demonstration of a Tunable Energy-Selective Gamma-Ray Imaging System Based on Recoil Electrons

Zhang,

Sheng,

Song

et al. 2024

Sensors

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The domain of gamma-ray imaging necessitates technological advancements to surmount the challenge of energy-selective imaging. Conventional systems are constrained in their dynamic focus on specific energy ranges, a capability imperative for differentiating gamma-ray emissions from diverse sources. This investigation introduces an innovative imaging system predicated on the detection of recoil electrons, addressing the demand for adjustable energy selectivity. Our methodology encompasses the design of a gamma-ray imaging system that leverages recoil electron detection to execute energy-selective imaging. The system’s efficacy was investigated experimentally, with emphasis on the adaptability of the energy selection window. The experimental outcomes underscore the system’s adeptness at modulating the energy selection window, adeptly discriminating gamma rays across a stipulated energy spectrum. The results corroborate the system’s adaptability, with an adjustable energy resolution that coincides with theoretical projections and satisfies the established criteria. This study affirms the viability and merits of utilizing recoil electrons for tunable energy-selective gamma-ray imaging. The system’s conceptualization and empirical validation represent a notable progress in gamma-ray imaging technology, with prospective applications extending from medical imaging to astrophysics. This research sets a solid foundation for subsequent inquiries and advancements in this domain.

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Section: Evaluation Of Energy Resolution and Detection Efficiencymentioning

confidence: 64%

“…As illustrated in Figure 8 , the system’s detection efficiencies for 1.173 MeV and 1.332 MeV gamma rays were determined to be

and

, respectively. In comparison, the Compton spectrometer [ 14 , 15 , 23 ], which also detects MeV-energy gamma rays using Compton electrons, exhibits a detection efficiency of approximately

Section: Resultsmentioning

confidence: 85%

See 1 more Smart Citation

Experimental Demonstration of a Tunable Energy-Selective Gamma-Ray Imaging System Based on Recoil Electrons

Zhang,

Sheng,

Song

et al. 2024

Sensors

Self Cite

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Design of radiation conversion target for Compton gamma magnetic spectrometer

et al. 2021

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This paper analyzes the intrinsic energy resolution, the influence law of multiple Coulomb scattering, the radiation conversion efficiency, and other factors of the Compton radiation conversion target. Based on the essential principle of interaction between gamma rays and matter, the theoretical characteristics and transport law of Compton electrons are analyzed. Through a Monte Carlo simulation, the composition, energy, and angular distribution of electrons emitted from the target surface are calculated; the influence of target parameters, such as target material, thickness, and electron collection angle, on target performance is studied; and then the optimization method of target parameters is established. Finally, the main performance parameters of the Compton radiation conversion target are given. This research reveals how multiple Coulomb scattering angles relate to materials of different types and thicknesses, as well as to the optimal collection angle. A series of optimized parameters for the material, mass thickness, and corresponding energy resolution of radiation conversion target with different conversion efficiencies are obtained.

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Spectral characterization of flash and high flux x-ray radiographic sources with a magnetic Compton spectrometer

Espy

Klasky

James

et al. 2021

Review of Scientific Instruments

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In this work, we present a new analysis method applied to revitalize permanent magnet Compton spectrometers used to measure photon energy spectra in the MeV range. The inversion of the measured electron distribution to determine the original photon distribution is achieved via a method of consistent coupled radiation transport and magnetic field mapping of the input photon spectra to the measured electron distribution. The method of linear least squares was used to perform the unfolding of the electron distribution to the initial photon spectra, without any assumptions made regarding the electron distribution. We present an application of this method to data from a nominal 19.4 MeV flash radiographic source (the first axis of the Dual Axis Radiographic Hydro-Test Facility) capable of generating 500 R @ 1 m in ∼60 ns and a medical therapy source (a Scanditronix M22, Microtron) capable of variable energies with nominal endpoints of 6, 10, 15, and 20 MeV and an output of ∼1000–2000 R/min @ 1 m. The results provide agreement between the modeled and unfolded experimentally measured photon spectra as quantified by statistical tests, from 1.5 to 20 MeV. Experimental results are presented as well as a discussion of the novel MCNP6-based simulations and methods for reconstruction of the spectra.

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Conceptual design of magnetic spectrometer for inverse-Compton X-ray source in MeV region

Cited by 3 publications

References 23 publications

Experimental Demonstration of a Tunable Energy-Selective Gamma-Ray Imaging System Based on Recoil Electrons

Experimental Demonstration of a Tunable Energy-Selective Gamma-Ray Imaging System Based on Recoil Electrons

Design of radiation conversion target for Compton gamma magnetic spectrometer

Spectral characterization of flash and high flux x-ray radiographic sources with a magnetic Compton spectrometer

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