Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment最新文献_第5页

Transverse phase space tomography and comparison with Allison scanner data in the RAON heavy ion accelerator RAON重离子加速器横向相空间层析成像及与艾利森扫描仪数据的比较

IF 1.4 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 : 2025-09-09 DOI: 10.1016/j.nima.2025.171005

Dong-O Jeon , Ji-Ho Jang , Jean-Baptiste Lallement , Veliko Dimov

引用次数: 0

Optimising a compact dual-particle imager with a novel combination of organic and inorganic scintillators 优化一个紧凑的双粒子成像仪与有机和无机闪烁体的新组合

IF 1.4 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 : 2025-09-09 DOI: 10.1016/j.nima.2025.171009

H. Al Hamrashdi , S.D. Monk , D. Cheneler , S. Al Ma'Amari

{"title":"Optimising a compact dual-particle imager with a novel combination of organic and inorganic scintillators","authors":"H. Al Hamrashdi , S.D. Monk , D. Cheneler , S. Al Ma'Amari","doi":"10.1016/j.nima.2025.171009","DOIUrl":"10.1016/j.nima.2025.171009","url":null,"abstract":"<div><div>This work discusses the process of optimising the performance of a compact dual-particle imager with a fast response time of 60 s and a signal processing time of 60 s. The imaging concept relies on a radiation scattering technique with a neutron-scattering sub-system, a Compton-scattering sub-system and a thermal neutron absorption layer. The enhanced design proposed here reduces the signal processing time compared to earlier work. The time lagging occurs mainly during neutron-gamma discrimination within the neutron scattering sub-system. Hence, the optimisation here which mainly targets investigating two promising dual particle detectors EJ-212 and EJ-276D as possible replacement for the EJ-204 in the original device. The results indicated that EJ-212 and EJ-276D offer similar elastic scattering and escape probabilities of neutrons at energies less than 100 keV. At energies higher than 500 keV, the elastic scattering probabilities increase with thickness, reaching a maximum around 24 % in both detectors. As for gamma-ray photons, the results showed that the two detectors have similar total mass attenuation coefficients. Further investigation showed that EJ-212 exhibits a higher Compton scattering cross-section with respect to EJ-276D. Additionally, results show that EJ-276D maintains the imager intrinsic efficiency while offering built-in neutron-gamma discrimination abilities.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 171009"},"PeriodicalIF":1.4,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105580","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

Four-stage diamond spectrometer for low-energy proton identification 用于低能质子鉴定的四级金刚石谱仪

IF 1.4 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 : 2025-09-08 DOI: 10.1016/j.nima.2025.170988

Julian Melbinger, Christina Weiss, Erich Griesmayer

引用次数: 0

Development of an active converter pair spectrometer for the future search for μ+→e+γ 用于μ+→e+γ的有源转换对谱仪的研制

IF 1.4 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 : 2025-09-08 DOI: 10.1016/j.nima.2025.170961

R. Sakakibara , S. Ban , L. Gerritzen , F. Ikeda , T. Iwamoto , A. Matsushita , K. Matsuoka , T. Mori , H. Nishiguchi , A. Ochi , W. Ootani , A. Oya , Y. Uchiyama , K. Yamamoto , R. Yokota

{"title":"Development of an active converter pair spectrometer for the future search for μ+→e+γ","authors":"R. Sakakibara , S. Ban , L. Gerritzen , F. Ikeda , T. Iwamoto , A. Matsushita , K. Matsuoka , T. Mori , H. Nishiguchi , A. Ochi , W. Ootani , A. Oya , Y. Uchiyama , K. Yamamoto , R. Yokota","doi":"10.1016/j.nima.2025.170961","DOIUrl":"10.1016/j.nima.2025.170961","url":null,"abstract":"<div><div>Plans for a future experiment to search for <span><math><mrow><mi>μ</mi><mo>+</mo><mo>→</mo><mi>e</mi><mo>+</mo><mi>γ</mi><mspace></mspace></mrow></math></span>after the current MEG II experiment are underway. To achieve an order of magnitude higher sensitivity than the MEG II, further improvements in detector resolution, particularly for gamma-rays, are required. To address this, we introduce a pair spectrometer consisting of a converter layer, which converts gamma-ray into electron–positron pairs, and a tracker layer, which measures their momenta. Additionally, we plan to use active material for the converter layer, allowing it to measure both the energy deposition and timing of the converted particles.</div><div>As a prototype of the active converter, we developed LYSO crystals with dimensions of <span><math><mrow><mn>3</mn><mo>×</mo><mn>5</mn><mo>×</mo><mtext>50</mtext><mspace></mspace><mtext>mm</mtext><msup><mrow></mrow><mrow><mi>3</mi></mrow></msup></mrow></math></span>, coupled with silicon photomultipliers on both edges. We evaluated their light yield and timing resolution using a 3GeV electron test beam. The results demonstrated an excellent timing resolution of 25–30ps and a sufficient light yield of 5000–7000 photoelectrons, meeting the requirements for the future <span><math><mrow><mi>μ</mi><mo>+</mo><mo>→</mo><mi>e</mi><mo>+</mo><mi>γ</mi><mspace></mspace></mrow></math></span>experiment.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170961"},"PeriodicalIF":1.4,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044077","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

Absolute calibration of scintillator-coupled photodiodes sensitivities with high energy X-rays 闪烁体耦合光电二极管灵敏度的高能x射线绝对校准

IF 1.4 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 : 2025-09-06 DOI: 10.1016/j.nima.2025.170985

Yves Ménesguen , B. Boyer , V. Hernandez-Elvira , M.-C. Lépy , S. Schoeder

引用次数: 0

Nanoscale lithium evaporation and behavior in a superconducting linear accelerator of a future fusion neutron source A-FNS 未来聚变中子源a - fns超导直线加速器中纳米级锂的蒸发和行为

IF 1.4 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 : 2025-09-04 DOI: 10.1016/j.nima.2025.170989

Takashi Ebisawa , Satoshi Sato , Makoto Oyaizu , Hiroshi Sakai , Eiji Kako

{"title":"Nanoscale lithium evaporation and behavior in a superconducting linear accelerator of a future fusion neutron source A-FNS","authors":"Takashi Ebisawa , Satoshi Sato , Makoto Oyaizu , Hiroshi Sakai , Eiji Kako","doi":"10.1016/j.nima.2025.170989","DOIUrl":"10.1016/j.nima.2025.170989","url":null,"abstract":"<div><div>The fusion neutron source (A-FNS) project is underway at the Rokkasho Institute for Fusion Energy, QST, in Japan. The A-FNS will conduct fusion neutron irradiation tests of fusion reactor materials. A high-intensity deuteron (D) beam accelerator with a Li target has been designed to produce large amounts of neutrons by the D-Li reaction.</div><div>The A-FNS linac comprises a superconducting linac and a free-surface liquid Li target. Because the degradation of superconducting radio-frequency (SRF) cavities by Li contamination is of concern, a dedicated beam line design for reducing Li back streaming and a study of the Li behavior in ultra-high vacuum (UHV) are necessary. However, the relationship between the SRF performance and Li contamination remains unclear. To clarify this, we designed a nanoscale Li evaporation system to inject Li vapor into SRF cavities and investigated the behavior of the Li vapor.</div><div>This paper reports the development and operational results of the nanoscale Li evaporation apparatus.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170989"},"PeriodicalIF":1.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996777","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

A machine learning framework for accurate and robust analysis of radiation detector pulses 用于精确和鲁棒分析辐射探测器脉冲的机器学习框架

IF 1.4 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 : 2025-09-03 DOI: 10.1016/j.nima.2025.170971

Bashir Sadeghi, Dustin Scriven, Aaron Chester, Ronald Fox, Sean Liddick, Giordano Cerizza

{"title":"A machine learning framework for accurate and robust analysis of radiation detector pulses","authors":"Bashir Sadeghi, Dustin Scriven, Aaron Chester, Ronald Fox, Sean Liddick, Giordano Cerizza","doi":"10.1016/j.nima.2025.170971","DOIUrl":"10.1016/j.nima.2025.170971","url":null,"abstract":"<div><div>The microscopic properties of atomic nuclei are used to study various scientific questions. They are essential for understanding the fundamental forces of nature and the chemical evolution of the universe. Detecting decay radiation from radioactive nuclei makes it possible to probe these fundamental nuclear properties. Detector waveform traces may contain additional information about the radiation. Generally, advanced signal processing techniques are needed to extract this additional information, often involving fitting the waveform with model response functions using non-linear least-squares optimization with second-order gradient methods. While this is a powerful technique, it is also computationally expensive, leading to slow processing time, which scales with the volume of data. To address this problem, we have developed a machine learning (ML) approach that infers the characteristics of traces from a model detector response function. In particular, we are interested in classifying whether a single recorded trace consists of one or two pulse constituents and estimating the pulse parameters. Our proposed ML method can precisely extract the pulses’ parameters, such as energy and timing information, and accurately classify the pulse multiplicity of a trace. Unlike non-learning-based approaches, our ML approach uses neural networks that are significantly faster at inference, as they do not require any optimization during this stage. The source code and raw data supporting this work are available at <span><span>https://github.com/sadeghi-bashir/SAEFit</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170971"},"PeriodicalIF":1.4,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105582","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

Measurement of the energy spectrum of a decommissioned Am-Be neutron source using a multi-concentric-water-layer neutron spectrometer 用多同心水层中子能谱仪测量退役Am-Be中子源的能谱

IF 1.4 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 : 2025-09-01 DOI: 10.1016/j.nima.2025.170987

H. Tang , R. Li , H. Gu , C.W. Bi , J.B. Yang , Q.B. Wang

{"title":"Measurement of the energy spectrum of a decommissioned Am-Be neutron source using a multi-concentric-water-layer neutron spectrometer","authors":"H. Tang , R. Li , H. Gu , C.W. Bi , J.B. Yang , Q.B. Wang","doi":"10.1016/j.nima.2025.170987","DOIUrl":"10.1016/j.nima.2025.170987","url":null,"abstract":"<div><div>The neutron energy spectrum of an Am-Be source from a decommissioned nuclear asphalt content gauge (CPN AC-2) was measured using a novel Multi-Concentric-Water-Layer Neutron Spectrometer (MWNS). The MWNS integrates five independently adjustable water-filled cavities (radial thicknesses: 1.0, 1.25, 8.0, 3.75, and 2.5 cm) and an embedded 1-cm-thick lead layer for high-energy neutron response enhancement, enabling automated configuration of 32 distinct measurement units via a programmable water-pumping system. Neutron counts were acquired using a spherical <sup>3</sup>He proportional counter, and the energy spectrum was unfolded via a parameterized model solved by genetic algorithms. This study investigated neutron spectrum unfolding using seven partial count subsets and the full set of 32 measurement counts. When unfolded with all 32 counts, the spectrum yielded <em>Qr</em> = 3.8 and corresponding <em>Qs</em> = 29.8, agreeing with Monte Carlo simulation. This work demonstrates the MWNS as a practical tool for automated neutron spectrometry, providing critical data for the safe reuse and shielding design of decommissioned neutron sources.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170987"},"PeriodicalIF":1.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931633","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

Compact tracking calorimeters for the detection of low-energy cosmic-ray (anti-)nuclei 用于探测低能宇宙射线（反）核的紧凑型跟踪量热计

IF 1.4 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 : 2025-08-31 DOI: 10.1016/j.nima.2025.170982

Martin J. Losekamm , Liesa Eckert , Peter Hinderberger , Luise Meyer-Hetling , Stephan Paul , Thomas Pöschl

引用次数: 0

Crystal fabrication techniques for enhanced performance in planar channeling 提高平面通道性能的晶体制造技术

IF 1.4 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 : 2025-08-29 DOI: 10.1016/j.nima.2025.170979

Marco Romagnoni , Laura Bandiera , Nicola Canale , Stefano Carsi , Davide De Salvador , Pierluigi Fedeli , Vincenzo Guidi , Giulia Lezzani , Lorenzo Malagutti , Fulvio Mancarella , Andrea Mazzolari , Riccardo Negrello , Gianfranco Paternò , Michela Prest , Rita Rizzoli , Alessia Selmi , Francesco Sgarbossa , Alexei Sytov , Fabrizio Tamarri , Melissa Tamisari , Viktor Tikhomirov

{"title":"Crystal fabrication techniques for enhanced performance in planar channeling","authors":"Marco Romagnoni , Laura Bandiera , Nicola Canale , Stefano Carsi , Davide De Salvador , Pierluigi Fedeli , Vincenzo Guidi , Giulia Lezzani , Lorenzo Malagutti , Fulvio Mancarella , Andrea Mazzolari , Riccardo Negrello , Gianfranco Paternò , Michela Prest , Rita Rizzoli , Alessia Selmi , Francesco Sgarbossa , Alexei Sytov , Fabrizio Tamarri , Melissa Tamisari , Viktor Tikhomirov","doi":"10.1016/j.nima.2025.170979","DOIUrl":"10.1016/j.nima.2025.170979","url":null,"abstract":"<div><div>Bent crystals have emerged as innovative tools for manipulating high-energy particle beams, offering unparalleled precision in beam steering for accelerator physics. However, the practical application of these devices is hindered by nuclear dechanneling, limiting channeling efficiency to approximately 80%. The GALORE project addresses this limitation by introducing a novel bent crystal design featuring a microtrench structure. Acting as a crystalline lens, the microtrench minimizes nuclear interactions, thereby significantly enhancing channeling efficiency.</div><div>This paper details the fabrication process for these advanced bent crystals, utilizing high-purity silicon wafers and state-of-the-art micromachining techniques. A silicon nitride thin film induces controlled curvature, while Deep Reactive Ion Etching (DRIE) is employed to create the microtrench with sub-micron precision. Characterization studies confirm the structural integrity and channeling potential of the microstructures.</div><div>These results represent a significant milestone in the development of bent crystals capable of achieving near-ideal channeling efficiency—a breakthrough in crystal-assisted particle beam technology. This advancement holds the potential to revolutionize collimation systems, enhance fixed-target experiments, and shape the design of next-generation accelerators.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1082 ","pages":"Article 170979"},"PeriodicalIF":1.4,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010132","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