Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment最新文献

The FABLE silicon detector array for comprehensive studies of fusion and breakup dynamics

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-26 DOI: 10.1016/j.nima.2025.170527

I.M. Harca , M.J. Basson , K.J. Cook , K.W. Brown , S.A. Gillespie , A.K. Anthony , N.E. Esker , S.N. Paneru

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Corrigendum to “Improving treatment quality of gynecologic cancers with online adaptive brachytherapy using deep learning-based CT imaging” [Nuclear Instrum. Method. Phys. Res. Sec. A: Accelerat. Spectrometer. Detector. Associat. Equipm. 1072 (2025) 170149]

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-25 DOI: 10.1016/j.nima.2025.170531

Hyemi Kim, Minjae Lee, Hyun Joon Choi

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Global crystal identification of light-sharing PET detectors using convolutional neural networks

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-23 DOI: 10.1016/j.nima.2025.170564

Eiji Yoshida, Go Akamatsu, Hideaki Tashima, Taiga Yamaya

{"title":"Global crystal identification of light-sharing PET detectors using convolutional neural networks","authors":"Eiji Yoshida, Go Akamatsu, Hideaki Tashima, Taiga Yamaya","doi":"10.1016/j.nima.2025.170564","DOIUrl":"10.1016/j.nima.2025.170564","url":null,"abstract":"<div><div>In light-sharing positron emission tomography (PET) detectors, Anger logic enables identification of crystals smaller than the photodetector size. This approach, which employs a 2D position histogram and pixel-to-crystal mapping, is widely adopted due to its hardware implementation simplicity. In contrast, independent readout systems allow interaction detection using light distribution analysis via photodetector arrays, as each photodetector collects signals independently. Both approaches require detector-specific recalibration during manufacturing, maintenance, and replacement. In this work, we develop a PET scanner-wide crystal identifier using convolutional neural networks (CNNs). Using independent photodetector signals obtained experimentally, the CNN processes crystal addresses derived via Anger logic as training data. When applied to a small animal PET scanner with 126 light-sharing PET detectors, the model is trained using 5 million events from only 40 detectors after denoising, which particularly includes removal of inter-crystal scattering (ICS). By learning light distribution, the CNN also operates as an ICS identifier that sets thresholds to suppress ICS events. With 98 % accuracy in photoelectric absorption events, we confirm a small rod phantom, validated to have similar timing and imaging performance as for Anger logic, provides a 1.7-fold improvement in sensitivity. This CNN-based crystal identifier eliminates the need for recalibration while maintaining image quality and offering applications in maintenance, replacement, and mass production.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170564"},"PeriodicalIF":1.5,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Production and manipulation of stable frozen hydrogen filaments

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-22 DOI: 10.1016/j.nima.2025.170526

Jost Froning, Christian Mannweiler, Eva-Maria Hausch, Anna Luna Hannen, Alfons Khoukaz

{"title":"Production and manipulation of stable frozen hydrogen filaments","authors":"Jost Froning, Christian Mannweiler, Eva-Maria Hausch, Anna Luna Hannen, Alfons Khoukaz","doi":"10.1016/j.nima.2025.170526","DOIUrl":"10.1016/j.nima.2025.170526","url":null,"abstract":"<div><div>Frozen hydrogen filaments or droplets/pellets in vacuum are of great interest as target for many experiments at hadron and lepton accelerators as well as at high-power laser systems. Especially in case of large distances between the position of target beam generation and the interaction point with an accelerator or laser beam, a high target beam stability in space and time is crucial. Here we present recent results on the long-term stability of frozen hydrogen filaments in vacuum, which have been obtained using a new cryogenic target generator. It could be shown that the trajectory of the frozen hydrogen target beam with a diameter of 10µm remains stable for over 60 h, with angular fluctuations below 0.08°. Furthermore, we present a novel strategy for the manipulation of the target beam, named cryobending. Here, the produced hydrogen filament is deflected by helium gas emerging from correction nozzles. We demonstrate the deflection of the hydrogen beam with one and two nozzles, achieving deflection angles up to 15.7(4)°. The presented results open the door for further developments of this beam position system, which enables target beam adjustment without any mechanical movement of the target components itself. Potential applications of these stable hydrogen target filaments are, e.g., the upcoming MAGIX (MAinz Gas Injection target eXperiment) or the planned <span><math><mover><mrow><mi>P</mi></mrow><mrow><mo>̄</mo></mrow></mover></math></span>ANDA (anti-Proton ANnihilation at DArmstadt) experiment.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170526"},"PeriodicalIF":1.5,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Finite grid instability and its relationship with aliasing

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-22 DOI: 10.1016/j.nima.2025.170533

R.G. Udby, B.A. Shadwick

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Prototype TOF-tracker MRPC for timing and position measurement in the J-PARC MARQ experiment

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-22 DOI: 10.1016/j.nima.2025.170517

Natsuki Tomida , Ryotaro Koike , Ryusuke Uda , Futaba Hayashi , Atsushi Sakaguchi , Chia-Yu Hsieh , Ken Suzuki , Kotaro Shirotori , Ming-Lee Chu , Rintaro Okazaki , Wen-Chen Chang

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Operation and performance of the ALICE Muon IDentifier RPCs during LHC Run3

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-22 DOI: 10.1016/j.nima.2025.170518

Livia Terlizzi, ALICE Collaboration

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Comparison of an OGS/Polystyrene scintillator (BSO-406) with pure OGS (BSO-100), EJ-276, EJ-309, and M600 scintillators

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-22 DOI: 10.1016/j.nima.2025.170559

M. Grodzicka-Kobylka , T. Szczesniak , L. Adamowski , L. Swiderski , K. Brylew , A. Syntfeld-Każuch , W.K. Warburton , J.S. Carlson , J.J. Valiente-Dobón

{"title":"Comparison of an OGS/Polystyrene scintillator (BSO-406) with pure OGS (BSO-100), EJ-276, EJ-309, and M600 scintillators","authors":"M. Grodzicka-Kobylka , T. Szczesniak , L. Adamowski , L. Swiderski , K. Brylew , A. Syntfeld-Każuch , W.K. Warburton , J.S. Carlson , J.J. Valiente-Dobón","doi":"10.1016/j.nima.2025.170559","DOIUrl":"10.1016/j.nima.2025.170559","url":null,"abstract":"<div><div>The scintillation properties and pulse shape discrimination (PSD) performance of the new BSO-406 (40 % organic glass scintillator and 60 % polystyrene) were investigated. We tested a cylindrical sample with dimensions of 2 × 2 inches. The study includes measurements of neutron-gamma discrimination capability, emission spectra, photoelectron yield, and the analysis of light pulse shapes originating from events related to gamma-rays and fast neutrons. The results were compared to data previously recorded using a pure Organic Glass Scintillator (BSO-100), an EJ-309 liquid scintillator, and EJ-276 and M600 polyurethane-based plastic scintillators. The results show that while BSO-406 has a 40 % lower light output compared to pure OGS, it remains comparable to EJ-309, with approximately 13 000 ph/MeV. Its PSD performance, although slightly lower than that of OGS, is the best among plastic scintillators.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170559"},"PeriodicalIF":1.5,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Deep learning-based restoration of noise-corrupted and saturated beam profiles for real-time proton beam monitoring and quality assurance

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-22 DOI: 10.1016/j.nima.2025.170525

Gwang-il Jung , Young Seok Hwang , Yu Mi Kim , Chan Young Lee , Jun Mok Ha , Eun Joo Oh , Jae Hyun Lee , Jimin Lee

{"title":"Deep learning-based restoration of noise-corrupted and saturated beam profiles for real-time proton beam monitoring and quality assurance","authors":"Gwang-il Jung , Young Seok Hwang , Yu Mi Kim , Chan Young Lee , Jun Mok Ha , Eun Joo Oh , Jae Hyun Lee , Jimin Lee","doi":"10.1016/j.nima.2025.170525","DOIUrl":"10.1016/j.nima.2025.170525","url":null,"abstract":"<div><div>The Korea Multi-purpose Accelerator Complex (KOMAC) operates a 100 MeV proton linear accelerator, providing a high flux proton beam at the TR103 general-purpose irradiation facility. A real-time and in situ proton beam profile monitoring system including a P43 phosphor screen and CMOS camera has been installed and tested at the facility. However, to ensure beam profile quality, two types of degradation must be addressed: beam profile noise and saturation. High background noise, combined with pepper noise from secondary radiation exposure, results in a noise-corrupted beam profile, while high flux proton irradiation causes beam profile saturation, truncating the upper portion. To effectively restore noise-corrupted and saturated beam profiles to their true beam profiles, we propose a deep learning–based beam profile restoration method that employs virtual beam profile datasets, with which large amounts of data can be acquired efficiently to increase model accuracy. We optimized deep learning models based on U-Net and ResNet architectures and evaluated the model performance applying the proposed method to restore both noise-corrupted and saturated beam profiles.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170525"},"PeriodicalIF":1.5,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of topographical radiation dose distribution of high-dose low-energy proton beam via processing digital image of photonic crystal films

IF 1.5 3区物理与天体物理

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-04-21 DOI: 10.1016/j.nima.2025.170551

Long-fei An , Ling-hua Zheng , Yan-hong Chen , Ming-shuo Tang , Yan-shi Zhang , Liang-wen Chen , Yun-long Wang , Rui Cheng , Jie Yang , Lei Yang

{"title":"Determination of topographical radiation dose distribution of high-dose low-energy proton beam via processing digital image of photonic crystal films","authors":"Long-fei An , Ling-hua Zheng , Yan-hong Chen , Ming-shuo Tang , Yan-shi Zhang , Liang-wen Chen , Yun-long Wang , Rui Cheng , Jie Yang , Lei Yang","doi":"10.1016/j.nima.2025.170551","DOIUrl":"10.1016/j.nima.2025.170551","url":null,"abstract":"<div><div>The precise determination of 2D dose distribution at high doses and convenient dose measurement methods are ongoing challenges in the study of beam diagnosis on large-scale scientific devices. The current work offers an impressive solution by integrating PEGDA photonic crystal films with HSB (Hue, Saturation, Brightness) image processing technology. Under irradiation by a proton beam with a low energy of 182.5 keV, the dose dependence of the radiochromic properties of PEGDA films was confirmed in the experiment. Low-energy protons can alter the microstructure of PEGDA films during energy deposition, reducing the characteristic distance and decreasing the diffraction center wavelength. Under irradiation by proton beams with high doses from 1 MGy to 17.6 MGy (on average), the PEGDA films exhibited a significant blue shift in color phase, with a clear linear relationship between wavelength and absorbed dose. This study offers a straightforward and effective real-time dose feedback analysis method compared to traditional radiochromic readout systems. This approach, which is based on visual observation and digital image analysis, could provide a precise assessment of dose distribution through intuitive image interpretation. In summary, this work introduces a direct and effective dosimeter along with a simple and rapid method for dose readout, offering valuable validation for beam diagnosis.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1077 ","pages":"Article 170551"},"PeriodicalIF":1.5,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0