Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment最新文献_第3页

Absolute efficiency response of the γ-ray spectrometer GRETINA for high-energy γ rays up to 6 MeV γ射线谱仪GRETINA对高达6 MeV的高能γ射线的绝对效率响应

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 : 2025-07-22 DOI: 10.1016/j.nima.2025.170858

D. Weisshaar , C.M. Campbell , A. Gade , L.A. Riley , D. Bazin , P.C. Bender , B. Elman , B. Longfellow , D. Rhodes

{"title":"Absolute efficiency response of the γ-ray spectrometer GRETINA for high-energy γ rays up to 6 MeV","authors":"D. Weisshaar , C.M. Campbell , A. Gade , L.A. Riley , D. Bazin , P.C. Bender , B. Elman , B. Longfellow , D. Rhodes","doi":"10.1016/j.nima.2025.170858","DOIUrl":"10.1016/j.nima.2025.170858","url":null,"abstract":"<div><div>GRETINA (<u>G</u>amma-<u>R</u>ay <u>E</u>nergy <u>T</u>racking <u>I</u>n-beam <u>N</u>uclear <u>A</u>rray), a state-of-the-art <span><math><mi>γ</mi></math></span>-ray tracking spectrometer, has been instrumental in advancing nuclear structure studies, particularly in experiments using fast beams of rare isotopes where the <span><math><mi>γ</mi></math></span> rays emitted in flight are subject to large Doppler shifts. This work presents an experimental determination of the <span><math><mi>γ</mi></math></span>-ray detection efficiency of GRETINA at energies up to 6 MeV. The high-energy <span><math><mi>γ</mi></math></span> rays originated from states that were populated in nucleon-removal reactions from a projectile beam at an intermediate beam energy of about 85 MeV/nucleon. Utilizing <span><math><mi>γ</mi></math></span>-<span><math><mi>γ</mi></math></span> coincidences, efficiency values were extracted in-beam and translated into a source efficiency at rest employing GEANT4 Monte Carlo simulations. A systematic discrepancy in the efficiency of the forward-positioned detectors was identified which is attributed to specific dead-time effects caused by high-energy light-particle events prevalent at forward angles, generating signals in the Ge crystals that saturate the preamplifier’s first stage. This study provides refined efficiency benchmarks for in-beam experiments, improving the accuracy of quantitative <span><math><mi>γ</mi></math></span>-ray spectroscopy analyses with GRETINA and GRETA (<u>G</u>amma <u>R</u>ay <u>E</u>nergy <u>T</u>racking <u>A</u>rray) in the future.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1081 ","pages":"Article 170858"},"PeriodicalIF":1.5,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713037","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

Development of an optical readout Micromegas for monitoring radiotherapy gamma rays 用于放射治疗伽马射线监测的光学读出器Micromegas的研制

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 : 2025-07-21 DOI: 10.1016/j.nima.2025.170836

Cong Liu , Chao Shan , Zhiyong Zhang , Yunzhi Peng , Xu Wang , Kunyu Liang , Jianbei Liu , Ming Shao , Yi Zhou

{"title":"Development of an optical readout Micromegas for monitoring radiotherapy gamma rays","authors":"Cong Liu , Chao Shan , Zhiyong Zhang , Yunzhi Peng , Xu Wang , Kunyu Liang , Jianbei Liu , Ming Shao , Yi Zhou","doi":"10.1016/j.nima.2025.170836","DOIUrl":"10.1016/j.nima.2025.170836","url":null,"abstract":"<div><div>Combining Micro-pattern gaseous detectors with optical imaging sensors, have been proven an effective method for accurate characterization of radiation beams. In response to the growing demand for large-area, real-time gamma rays dose monitoring in radiotherapy, an optical readout Micromegas detector was manufactured with a transparent indium tin oxide glass anode. Its effective area is 25 cm × 25 cm. Preliminary assessment employing X-ray sources yielded a spatial resolution of 375 <span><math><mi>μ</mi></math></span> m (at 10% modulation transfer function). Subsequently, the prototype was tested under clinical radiotherapy gamma rays. The results show that the linearity response exceeds 99.9% (R-squared value) for different doses. For a system-configured 100 mm field of view, the measured field size was 99.70 mm, and the penumbra width was determined to be 4.01 mm. These results indicate the good potential of this method for quality assurance in radiotherapy gamma rays. Additionally, the optical readout Micromegas is expected to be expanded to monitor other types of high-flux beams, such as medical pencil proton rays and neutron beams inspections by adding some conversion layers.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1081 ","pages":"Article 170836"},"PeriodicalIF":1.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694316","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

High-granularity timing hodoscopes for the AMBER experiment 琥珀实验用高粒度定时窥镜

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 : 2025-07-19 DOI: 10.1016/j.nima.2025.170837

Karl Eichhorn , Jan Michael Friedrich , Igor Konorov , Martin J. Losekamm , Tim Maehrholz , Stephan Paul

{"title":"High-granularity timing hodoscopes for the AMBER experiment","authors":"Karl Eichhorn , Jan Michael Friedrich , Igor Konorov , Martin J. Losekamm , Tim Maehrholz , Stephan Paul","doi":"10.1016/j.nima.2025.170837","DOIUrl":"10.1016/j.nima.2025.170837","url":null,"abstract":"<div><div>The AMBER experiment at CERN will measure the proton’s charge radius via muon-proton elastic scattering at high projectile energies and small momentum transfers to help to resolve the so-called <em>proton radius puzzle</em>, i.e., the discrepancy between charge radii measured with different experimental techniques. The core setup at AMBER consists of a hydrogen-filled time projection chamber (TPC). Tracking detectors upstream and downstream of the TPC measure the trajectories of the incoming and outgoing muons to determine their scattering angles. To resolve pile-up hits in the tracking detectors, we are constructing four high-granularity hodoscopes from 500-<span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span> scintillating-plastic fibers and arrays of silicon photomultipliers. In this contribution, we present the design of the scintillating-fiber hodoscopes and first results of test-beam measurements with scaled-down prototypes. We will particularly emphasize how we managed to design detectors with a low material budget.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1081 ","pages":"Article 170837"},"PeriodicalIF":1.5,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685714","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

Study of the PIPSBox detector for radioxenon measurement 用于放射性氙测量的PIPSBox探测器的研究

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 : 2025-07-19 DOI: 10.1016/j.nima.2025.170892

Niu Yazhou, Zhang Ruiqin, Li Qi, Qin Yuhao, Fan Yuanqing, Jia Huaimao, Zhang Xinjun, Zhao Yungang, Guo Qilong, Wang Shilian

引用次数: 0

Detection of ionization electrons with hybrid pixel detectors for non-destructive beam profile measurements 非破坏性光束轮廓测量用混合像素检测器检测电离电子

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 : 2025-07-19 DOI: 10.1016/j.nima.2025.170845

C. Fleisig , J. Braach , G. Cabrera , S. Jensen , J. Joul , M. McLean , J.W. Storey

{"title":"Detection of ionization electrons with hybrid pixel detectors for non-destructive beam profile measurements","authors":"C. Fleisig , J. Braach , G. Cabrera , S. Jensen , J. Joul , M. McLean , J.W. Storey","doi":"10.1016/j.nima.2025.170845","DOIUrl":"10.1016/j.nima.2025.170845","url":null,"abstract":"<div><div>The Beam Gas Ionization (BGI) profile monitor is an Ionization Profile Monitor used for continuous, non-destructive transverse beam profile measurements in synchrotrons at CERN. Electrons are produced when residual gas in the beam pipe is ionized by the proton or ion beams orbiting the particle accelerator. In the BGI profile monitor, these ionization electrons are accelerated onto Timepix3-based silicon hybrid pixel detectors using co-linear electric and magnetic fields. Individual electrons are detected and subsequently summed to reconstruct the beam’s transverse profile. The energy absorption of the <span><math><mo>∼</mo></math></span>8.6keV ionization electrons in the sensor layers of the detectors induces electrical signals close to or below the noise floors of the Timepix3’s digitizers. This results in hyper-sensitivity of the detection efficiency to small changes in the detectors’ global thresholds, as demonstrated in simulations, and creates challenges for the equalization of detection efficiency across all four detectors in each BGI instrument. This equalization is necessary to utilize the full field-of-view of the instrument. Emittance measurements from an equalized BGI profile monitor are compared to measurements from Beam Wire Scanners and show good agreement. This constitutes the first validation of the primary use case of the BGI profile monitor.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1081 ","pages":"Article 170845"},"PeriodicalIF":1.5,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713036","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

Exploring the high-energy universe with a novel photodetector configuration 用一种新型光电探测器结构探索高能宇宙

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 : 2025-07-19 DOI: 10.1016/j.nima.2025.170842

Jazmin Stewart, Jon Lapington, SWGO collaboration

引用次数: 0

Developing a network discovery protocol for the constellation control and data acquisition framework 为星座控制和数据采集框架开发网络发现协议

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 : 2025-07-19 DOI: 10.1016/j.nima.2025.170838

Stephan Lachnit, EDDA collaboration

引用次数: 0

Quantum measurement systems and applications to particle physics and cosmology 量子测量系统及其在粒子物理和宇宙学中的应用

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 : 2025-07-19 DOI: 10.1016/j.nima.2025.170847

Masashi Hazumi

引用次数: 0

The CMS barrel timing layer: test beam confirmation of module timing performance CMS筒体授时层：测试波束确认模块授时性能

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 : 2025-07-19 DOI: 10.1016/j.nima.2025.170823

F. Addesa , P. Akrap , A. Albert , B. Allmond , T. Anderson , J. Babbar , D. Baranyai , P. Barria , C. Basile , A. Benaglia , A. Benato , M. Benettoni , M. Besancon , N. Bez , S. Bhattacharya , R. Bianco , D. Blend , A. Boletti , A. Bornheim , R. Bugalho , G. Zilizi

{"title":"The CMS barrel timing layer: test beam confirmation of module timing performance","authors":"F. Addesa , P. Akrap , A. Albert , B. Allmond , T. Anderson , J. Babbar , D. Baranyai , P. Barria , C. Basile , A. Benaglia , A. Benato , M. Benettoni , M. Besancon , N. Bez , S. Bhattacharya , R. Bianco , D. Blend , A. Boletti , A. Bornheim , R. Bugalho , G. Zilizi","doi":"10.1016/j.nima.2025.170823","DOIUrl":"10.1016/j.nima.2025.170823","url":null,"abstract":"<div><div>First of its kind, the barrel section of the MIP Timing Detector is a large area timing detector based on LYSO:Ce crystals and SiPMs which are required to operate in an unprecedentedly harsh radiation environment (up to an integrated fluence of <span><math><mrow><mn>2</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>14</mn></mrow></msup></mrow></math></span> 1 MeV <span><math><mrow><msub><mrow><mi>n</mi></mrow><mrow><mi>eq</mi></mrow></msub><mo>/</mo><msup><mrow><mi>cm</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>). It is designed as a key element of the upgrade of the existing CMS detector to provide a time resolution for minimum ionizing particles in the range between 30–60 ps throughout the entire operation at the High Luminosity LHC. A thorough optimization of its components has led to the final detector module layout which exploits 25 <span><math><mi>μ</mi></math></span>m cell size SiPMs and 3.75 mm thick crystals. This design achieved the target performance in a series of test beam campaigns. In this paper we present test beam results which demonstrate the desired performance of detector modules in terms of radiation tolerance, time resolution and response uniformity.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1081 ","pages":"Article 170823"},"PeriodicalIF":1.5,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694315","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

New detector development and performance evaluation for KamLAND2-Zen experiment KamLAND2-Zen实验新型探测器研制及性能评价

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 : 2025-07-18 DOI: 10.1016/j.nima.2025.170850

Jun Nakane

{"title":"New detector development and performance evaluation for KamLAND2-Zen experiment","authors":"Jun Nakane","doi":"10.1016/j.nima.2025.170850","DOIUrl":"10.1016/j.nima.2025.170850","url":null,"abstract":"<div><div>To prove the Mayorana nature of neutrinos, the KamLAND-Zen experiment is searching for neutrinoless double beta (<span><math><mrow><mn>0</mn><mi>ν</mi><mi>β</mi><mi>β</mi></mrow></math></span>) decays. The KamLAND-Zen 800 experiment phase used one of the world’s most sensitive detectors, the KamLAND detector, and a <span><math><mrow><mn>0</mn><mi>ν</mi><mi>β</mi><mi>β</mi></mrow></math></span> decay nucleus, 745 kg of enriched xenon and we measured until 2024. We then set the world’s most stringent limits on the lower half-life of <span><math><mrow><mn>0</mn><mi>ν</mi><mi>β</mi><mi>β</mi></mrow></math></span> decay and the upper limit of the effective Mayolana mass. This experiment is currently being upgraded to the next-generation detector KamLAND2 detector to further improve sensitivity. Because we needed to test these upgrades before installing KamLAND2 detector, we constructed a prototype detector and tested high quantum efficiency photomultiplier tubes (HQE-PMTs), light-collection Winston Cone mirrors on the HQE-PMTs, and high emission liquid scintillator. The evaluation results of the detector’s light yield showed that the installation of light-collection mirrors alone can increase the light yield by a factor 1.7 to 2.6. Furthermore, the results also showed remarkable stability within the margin of error over a long period of about one year. However, several hardware problems were identified. One of these problems was that the mirrors of adjacent HQE-PMTs contacted each other, and the entirety of those mirrors were severely distorted. Based on this, we decided to use a flexible film mirror for the mirror contact area. The new mirror was shown to avoid significant distortion in an installation test using a model, and we plan to conduct an installation test and detailed performance evaluation using the actual mirror in the future.</div></div>","PeriodicalId":19359,"journal":{"name":"Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment","volume":"1081 ","pages":"Article 170850"},"PeriodicalIF":1.5,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696417","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