Pub Date : 2024-07-01DOI: 10.1088/1748-0221/19/07/e07003
J. Shim, D. Jeon, Y. Jung, H. Yang, Y. Lim, H. Cho, C. Seo, K.Y. Choi, C. Sone, M.S. Jang
{"title":"Erratum: Design of stationary computed tomography baggage scanner with π-angle sparsity and compressed-sensing reconstruction: simulation study","authors":"J. Shim, D. Jeon, Y. Jung, H. Yang, Y. Lim, H. Cho, C. Seo, K.Y. Choi, C. Sone, M.S. Jang","doi":"10.1088/1748-0221/19/07/e07003","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/e07003","url":null,"abstract":"","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":"82 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1748-0221/19/07/t07006
Huiying Li, Z. Fan, Shuaibin Liu, F. Lin, T. Hu, Yixiang Mo, Shuai Yuan, R. Xie, Jiale Sun, Haibo Yi, Zhipeng Liu, Jiulin Wu, H. Yuan, Yanliang Tan
Radon exhaled from rocks, building materials, and soil can be harmful to human health, so it is necessary to measure radon and its exhalation rate. In this paper, a novel method is proposed to simulate radon exhalation from different medium surface by using a solid Rn-222 source, and the radon exhalation rate can be adjusted by replacing radon accumulation chambers with different bottom areas. Firstly, an experiment was done to determine the activity of the Rn-222 source, and then the theoretical radon exhalation rate can be quickly calculated from the relationship between the radon source activity and the bottom area of the radon accumulation chamber. Three sets of comparative experiments were conducted using two radon accumulation chambers with different volumes, respectively. Comparing the average values obtained from the experiments with the calculated theoretical values, it can be obtained that the differences corresponding to the two radon accumulation chambers between the theoretical radon exhalation rates and the experimentally average values are all within 6%. Without replacing the radon source, the radon exhalation rate is inversely varies with the bottom area of the chamber. Therefore, the correctness of adjusting the radon exhalation rate by replacing radon accumulation chambers with different bottom areas to simulate radon exhalation from different media surfaces is verified. This method can be used to calibrate the radon exhalation measuring instruments.
{"title":"A novel method to simulate radon exhalation rate with a solid Rn-222 source","authors":"Huiying Li, Z. Fan, Shuaibin Liu, F. Lin, T. Hu, Yixiang Mo, Shuai Yuan, R. Xie, Jiale Sun, Haibo Yi, Zhipeng Liu, Jiulin Wu, H. Yuan, Yanliang Tan","doi":"10.1088/1748-0221/19/07/t07006","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/t07006","url":null,"abstract":"\u0000 Radon exhaled from rocks, building materials, and soil can\u0000 be harmful to human health, so it is necessary to measure radon and\u0000 its exhalation rate. In this paper, a novel method is proposed to\u0000 simulate radon exhalation from different medium surface by using a\u0000 solid Rn-222 source, and the radon exhalation rate can be adjusted\u0000 by replacing radon accumulation chambers with different bottom\u0000 areas. Firstly, an experiment was done to determine the activity of\u0000 the Rn-222 source, and then the theoretical radon exhalation rate\u0000 can be quickly calculated from the relationship between the radon\u0000 source activity and the bottom area of the radon accumulation\u0000 chamber. Three sets of comparative experiments were conducted using\u0000 two radon accumulation chambers with different volumes,\u0000 respectively. Comparing the average values obtained from the\u0000 experiments with the calculated theoretical values, it can be\u0000 obtained that the differences corresponding to the two radon\u0000 accumulation chambers between the theoretical radon exhalation rates\u0000 and the experimentally average values are all within 6%. Without\u0000 replacing the radon source, the radon exhalation rate is inversely\u0000 varies with the bottom area of the chamber. Therefore, the\u0000 correctness of adjusting the radon exhalation rate by replacing\u0000 radon accumulation chambers with different bottom areas to simulate\u0000 radon exhalation from different media surfaces is verified. This\u0000 method can be used to calibrate the radon exhalation measuring\u0000 instruments.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":"227 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141839805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1748-0221/19/07/c07009
C. Sunny
The DarkSide-50 (DS-50) experiment aims at the direct detection of weakly interacting massive particles. It is a dual-phase liquid argon time projection chamber (LAr TPC) where Dark Matter (DM), which constitutes five sixths of all matter in the universe, is expected to interact with an argon nucleus resulting in a nuclear recoil. A scintillation signal (S1) is produced as a result of the ionising events from the DM-Ar interaction. The impurities in LAr, such as O,2, N2, H2O, etc., at the ppm level, quench the scintillation photons, leading to a reduction in the observed lifetime of the triplet state. In this contribution, the effect of impurities on the triplet lifetime is analyzed for individual events using DS-50 data, with a primary focus on nitrogen, one of the candidates for the impurities in LAr hypothesized to cause a suppression of triplet lifetime. This is done by determining the lifetime of the triplet component with a known purity, which can be used as a reference for the purity level of argon used in current and future dark matter searches.
{"title":"Analysis of the S1 triplet component in the DarkSide-50 experiment","authors":"C. Sunny","doi":"10.1088/1748-0221/19/07/c07009","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/c07009","url":null,"abstract":"\u0000 The DarkSide-50 (DS-50) experiment aims at the direct detection of weakly interacting massive particles. It is a dual-phase liquid argon time projection chamber (LAr TPC) where Dark Matter (DM), which constitutes five sixths of all matter in the universe, is expected to interact with an argon nucleus resulting in a nuclear recoil. A scintillation signal (S1) is produced as a result of the ionising events from the DM-Ar interaction. The impurities in LAr, such as O,2, N2, H2O, etc., at the ppm level, quench the scintillation photons, leading to a reduction in the observed lifetime of the triplet state. In this contribution, the effect of impurities on the triplet lifetime is analyzed for individual events using DS-50 data, with a primary focus on nitrogen, one of the candidates for the impurities in LAr hypothesized to cause a suppression of triplet lifetime. This is done by determining the lifetime of the triplet component with a known purity, which can be used as a reference for the purity level of argon used in current and future dark matter searches.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":"71 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141853087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The micro gas chromatography columns (μGCs) were prepared for rapid breath analysis of gastric cancer. The synergistic effect of the specific surface area and the action of pore diameter on the separation capacity was investigated. The μGC-IL/UIO-66 was prepared using [P66614][Cl]/UIO-66 as the stationary phase. For comparison, the μGC-IL and the μGC-UIO-66 were prepared using [P66614][Cl] and UIO-66 as stationary phase, respectively. [P66614][Cl]/UIO-66 had a high specific surface area with a pore diameter distribution of 0.49 nm. The high specific surface area of [P66614][Cl]/UIO-66 improved the efficiency of adsorption and desorption, while the porous structure with an appropriate pore diameter acted as an efficient molecular sieve, synergistically enhancing separation efficiency. So compared to the μGC-IL and the μGC-UIO-66, the HETP of μGC-IL/UIO-66 was reduced by 68.2% and 22.6%, respectively. In the analysis of volatile biomarkers (acetone, benzene, n-hexane and toluene) for gastric cancer, the resolutions between adjacent peaks were 1.96, 2.13 and 3.67, which met the requirements for quantitative analysis (R > 1.5). The retention times of acetone, benzene, n-hexane and toluene were 0.72 min, 0.96 min, 1.33 min and 1.67 min, which enables rapid analysis. All may suggest that the μGC-IL/UIO-66 has a promising application in rapid breath analysis of gastric cancer.
{"title":"Micro gas chromatography column using ionic liquid modified metal-organic framework as stationary phase for rapid breath analysis of gastric cancer","authors":"Guoqiang Hu, Zihao Wang, Feifei Yan, Hairong Wang, Xinyuan Hua, Kangning Zhang, Jialing Gao, Pengyu Dong, Shengbin Li, Cheng Cheng","doi":"10.1088/1748-0221/19/07/p07016","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/p07016","url":null,"abstract":"\u0000 The micro gas chromatography columns (μGCs) were\u0000 prepared for rapid breath analysis of gastric cancer. The\u0000 synergistic effect of the specific surface area and the action of\u0000 pore diameter on the separation capacity was investigated. The\u0000 μGC-IL/UIO-66 was prepared using [P66614][Cl]/UIO-66 as the\u0000 stationary phase. For comparison, the μGC-IL and the\u0000 μGC-UIO-66 were prepared using [P66614][Cl] and UIO-66 as\u0000 stationary phase, respectively. [P66614][Cl]/UIO-66 had a high\u0000 specific surface area with a pore diameter distribution of\u0000 0.49 nm. The high specific surface area of [P66614][Cl]/UIO-66\u0000 improved the efficiency of adsorption and desorption, while the\u0000 porous structure with an appropriate pore diameter acted as an\u0000 efficient molecular sieve, synergistically enhancing separation\u0000 efficiency. So compared to the μGC-IL and the\u0000 μGC-UIO-66, the HETP of μGC-IL/UIO-66 was reduced by\u0000 68.2% and 22.6%, respectively. In the analysis of volatile\u0000 biomarkers (acetone, benzene, n-hexane and toluene) for gastric\u0000 cancer, the resolutions between adjacent peaks were 1.96, 2.13 and\u0000 3.67, which met the requirements for quantitative analysis\u0000 (R > 1.5). The retention times of acetone, benzene, n-hexane and\u0000 toluene were 0.72 min, 0.96 min, 1.33 min and 1.67 min, which\u0000 enables rapid analysis. All may suggest that the μGC-IL/UIO-66\u0000 has a promising application in rapid breath analysis of gastric\u0000 cancer.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":"2020 39","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141851366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1748-0221/19/07/P07002
H.N. Ratliff, T. Kögler, G. Pausch, L. Setterdahl, K. Skjerdal, J. Turko, I. Meric
This work details a Compton-scattering-based methodology, referred to as Backscatter Gating (BSG), for characterizing the time, energy, and position resolutions of long form factor organic scintillators using a single, fairly minimal measurement setup. Such a method can ease the experimental burden in scenarios where many such scintillator elements may need to be individually characterized before assembly into a larger detector system. A thorough theoretical exploration of the systematic parameters is provided, and the BSG method is then demonstrated by a series of experimental measurements. This “complete” characterization via the BSG method is novel, having previously been used primarily for energy resolution characterization. The method also allows for determination of the assembled scintillator's technical attenuation length and provides a means of verifying the presence or absence of flaws within the scintillator or its optical coupling.
{"title":"The Backscatter Gating method for time, energy, and position resolution characterization of long form factor organic scintillators","authors":"H.N. Ratliff, T. Kögler, G. Pausch, L. Setterdahl, K. Skjerdal, J. Turko, I. Meric","doi":"10.1088/1748-0221/19/07/P07002","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/P07002","url":null,"abstract":"This work details a Compton-scattering-based methodology, referred to as Backscatter Gating (BSG), for characterizing the time, energy, and position resolutions of long form factor organic scintillators using a single, fairly minimal measurement setup. Such a method can ease the experimental burden in scenarios where many such scintillator elements may need to be individually characterized before assembly into a larger detector system. A thorough theoretical exploration of the systematic parameters is provided, and the BSG method is then demonstrated by a series of experimental measurements. This “complete” characterization via the BSG method is novel, having previously been used primarily for energy resolution characterization. The method also allows for determination of the assembled scintillator's technical attenuation length and provides a means of verifying the presence or absence of flaws within the scintillator or its optical coupling.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":"7 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141710345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1748-0221/19/07/p07031
Xiangqi Tian, Siqi He, Yi Zhou, M. Shao, Jianbei Liu, Zhiyong Zhang, Lunlin Shang, Xu Wang
In this paper, we introduce a novel single amplification-stage Micro-Pattern Gaseous Detector (MPGD) that incorporates a Diamond-Like Carbon (DLC)-based resistive electrode at the bottom of micro-groove structures, the micro-Resistive Groove (μRGroove) detector. The μRGroove shares a similar compact stack geometry with the micro-Resistive WELL (μRWELL) detector, but it distinguishes itself by employing a groove structure for charge amplification instead of a well. The top metal layer of the grooves naturally forms an array of strips. By incorporating additional 1-dimensional (1D) readout strips beneath the DLC electrode, a 2-dimensional (2D) strip-readout scheme can be easily implemented. Two prototypes of the μRGroove (10 cm× 10 cm) were manufactured in 2022 at CERN, and their performance was evaluated through X-ray and beam tests. The results indicate a gas gain > 104, an energy resolution of ~ 25%, and negligible charging-up effects for 8 keV Cu X-rays. Additionally, the detection efficiency was found to be ~ 95%, with a position resolution of ∼ 75 μm for 150-GeV/c muons. The μRGroove boasts a compact design and robustness against discharges. Furthermore, compared to the μRWELL, it offers cost savings in detector fabrication and yields significantly higher signal amplitude (approximately double) at the same gas gain. These attributes position the μRGroove as a promising candidate for large-area and low-material-budget tracking applications.
{"title":"The micro-resistive groove detector: a new compact single amplification-stage MPGD","authors":"Xiangqi Tian, Siqi He, Yi Zhou, M. Shao, Jianbei Liu, Zhiyong Zhang, Lunlin Shang, Xu Wang","doi":"10.1088/1748-0221/19/07/p07031","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/p07031","url":null,"abstract":"\u0000 In this paper, we introduce a novel single\u0000 amplification-stage Micro-Pattern Gaseous Detector (MPGD) that\u0000 incorporates a Diamond-Like Carbon (DLC)-based resistive electrode\u0000 at the bottom of micro-groove structures, the micro-Resistive Groove\u0000 (μRGroove) detector. The μRGroove shares a similar compact\u0000 stack geometry with the micro-Resistive WELL (μRWELL) detector,\u0000 but it distinguishes itself by employing a groove structure for\u0000 charge amplification instead of a well. The top metal layer of the\u0000 grooves naturally forms an array of strips. By incorporating\u0000 additional 1-dimensional (1D) readout strips beneath the DLC\u0000 electrode, a 2-dimensional (2D) strip-readout scheme can be easily\u0000 implemented. Two prototypes of the μRGroove\u0000 (10 cm× 10 cm) were manufactured in 2022 at CERN,\u0000 and their performance was evaluated through X-ray and beam\u0000 tests. The results indicate a gas gain > 104, an energy\u0000 resolution of ~ 25%, and negligible charging-up effects for\u0000 8 keV Cu X-rays. Additionally, the detection efficiency was found\u0000 to be ~ 95%, with a position resolution of ∼ 75 μm\u0000 for 150-GeV/c muons. The μRGroove boasts a compact design and\u0000 robustness against discharges. Furthermore, compared to the \u0000 μRWELL, it offers cost savings in detector fabrication and\u0000 yields significantly higher signal amplitude (approximately double)\u0000 at the same gas gain. These attributes position the μRGroove as\u0000 a promising candidate for large-area and low-material-budget\u0000 tracking applications.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":"32 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141840961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1748-0221/19/07/p07030
N. Brown, Tommy Ao, Daniel H. Dolan, Marcus D. Knudson, J. Lane
We present DENNIS (Diffraction Experiment desigN and aNalysiS): a graphical software tool useful for the design and analysis of dynamic x-ray diffraction experiments, such as those performed on the Z Pulsed Power Facility, Thor Pulsed Power Generator, and Dynamic Compression Sector (DCS) of the Advanced Photon Source. DENNIS provides rapid powder and single-crystal diffraction pattern predictions and powder diffraction pattern image integration in three-dimensional geometries. Additional features include crystallographic information file reading, image processing, and synthetic diffraction pattern image generation. We overview the software's capabilities, detail the prediction and integration methodologies, and provide example implementations on Z and DCS experiments.
我们介绍的 DENNIS（衍射实验设计和分析）是一种图形软件工具，可用于设计和分析动态 X 射线衍射实验，例如在先进光子源的 Z 脉冲功率设施、雷神脉冲功率发生器和动态压缩扇区（DCS）上进行的实验。DENNIS 提供快速的粉末和单晶衍射图样预测以及粉末衍射图样三维几何图像集成。其他功能包括晶体学信息文件读取、图像处理和合成衍射图样图像生成。我们概述了该软件的功能，详细介绍了预测和整合方法，并提供了 Z 和 DCS 实验的实施示例。
{"title":"DENNIS: a design and analysis tool for dynamic material x-ray diffraction experiments","authors":"N. Brown, Tommy Ao, Daniel H. Dolan, Marcus D. Knudson, J. Lane","doi":"10.1088/1748-0221/19/07/p07030","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/p07030","url":null,"abstract":"\u0000 We present DENNIS (Diffraction Experiment desigN and\u0000 aNalysiS): a graphical software tool useful for the design and\u0000 analysis of dynamic x-ray diffraction experiments, such as those\u0000 performed on the Z Pulsed Power Facility, Thor Pulsed Power\u0000 Generator, and Dynamic Compression Sector (DCS) of the Advanced\u0000 Photon Source. DENNIS provides rapid powder and single-crystal\u0000 diffraction pattern predictions and powder diffraction pattern image\u0000 integration in three-dimensional geometries. Additional features\u0000 include crystallographic information file reading, image processing,\u0000 and synthetic diffraction pattern image generation. We overview the\u0000 software's capabilities, detail the prediction and integration\u0000 methodologies, and provide example implementations on Z and DCS\u0000 experiments.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":"7 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1748-0221/19/07/P07003
R. Behrens
Reference beta-particle radiation fields are well described in the standard series ISO 6980 issued by the International Organization for Standardization (ISO). In its 2022/2023 edition, two new radiation fields are defined consisting of a radioactive 90Sr/90Y source and a 3 mm or 4 mm plastic absorber located 4 cm in front of the source — with the reference plane of the radiation field being located 20 cm from the source. In this work, the detailed method of how to implement and use these new radiation fields using a Beta Secondary Standard, BSS 2, is described. Furthermore, the influence of the position and thickness of the plastic absorber on the radiation field, i.e., on its spectral and angular distribution as well as on the dose rate, was investigated. It turned out that a change of position by one centimeter or a thickness change of a tenth of a millimeter result in significant changes of the dose rate (∼ 7 % to ∼ 10 %). Finally, the dependence of the angular and spectral distribution on the position and thickness of the absorber was investigated in detail.
{"title":"Implementation of energy reduced 90Sr/90Y radiation fields, or: Propagation of beta radiation, a case study","authors":"R. Behrens","doi":"10.1088/1748-0221/19/07/P07003","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/P07003","url":null,"abstract":"Reference beta-particle radiation fields are well described in the standard series ISO 6980 issued by the International Organization for Standardization (ISO). In its 2022/2023 edition, two new radiation fields are defined consisting of a radioactive 90Sr/90Y source and a 3 mm or 4 mm plastic absorber located 4 cm in front of the source — with the reference plane of the radiation field being located 20 cm from the source. In this work, the detailed method of how to implement and use these new radiation fields using a Beta Secondary Standard, BSS 2, is described. Furthermore, the influence of the position and thickness of the plastic absorber on the radiation field, i.e., on its spectral and angular distribution as well as on the dose rate, was investigated. It turned out that a change of position by one centimeter or a thickness change of a tenth of a millimeter result in significant changes of the dose rate (∼ 7 % to ∼ 10 %). Finally, the dependence of the angular and spectral distribution on the position and thickness of the absorber was investigated in detail.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":"40 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141690546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
During the past decade, many diagnostic instruments have been developed that utilize electronic pulse dilation to achieve temporal resolution in the sub-10 ps range. The motivation behind these development efforts was the need for advanced diagnostics in high-density physics experiments around the world. This technology converts the signal of interest into a free electron cloud, which is accelerated into a vacuum drift space. The acceleration potential varies over time and causes axial velocity dispersion in the electron cloud. This velocity dispersion is converted into time separation after electrons pass through drift space. Then, traditional time resolved methods were used to detect free electrons, and the effective temporal resolution was magnified many times. A gated microchannel plate (MCP) X-ray framing camera based on pulse-dilation technology has been designed and manufactured in the paper. Here, we discuss design details and applications of these instruments. The temporal resolution measured without using broadening technology is approximately 78 ps. When the excitation pulse is applied to the PC, the pulse dilation technique is used to increase the measured temporal resolution to 9 ps. The propagation speed of gated pulses in MCP microstrip lines was measured using fiber bundle method, which is approximately 1.8 × 108 m/s.
{"title":"Designed a photomultiplier tube X-ray framing camera based on pulse dilation technology","authors":"Wenyong Fu, Chenman Hu, Ling Li, Rongyan Zhou, Ping Chen","doi":"10.1088/1748-0221/19/07/P07008","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/P07008","url":null,"abstract":"During the past decade, many diagnostic instruments have been developed that utilize electronic pulse dilation to achieve temporal resolution in the sub-10 ps range. The motivation behind these development efforts was the need for advanced diagnostics in high-density physics experiments around the world. This technology converts the signal of interest into a free electron cloud, which is accelerated into a vacuum drift space. The acceleration potential varies over time and causes axial velocity dispersion in the electron cloud. This velocity dispersion is converted into time separation after electrons pass through drift space. Then, traditional time resolved methods were used to detect free electrons, and the effective temporal resolution was magnified many times. A gated microchannel plate (MCP) X-ray framing camera based on pulse-dilation technology has been designed and manufactured in the paper. Here, we discuss design details and applications of these instruments. The temporal resolution measured without using broadening technology is approximately 78 ps. When the excitation pulse is applied to the PC, the pulse dilation technique is used to increase the measured temporal resolution to 9 ps. The propagation speed of gated pulses in MCP microstrip lines was measured using fiber bundle method, which is approximately 1.8 × 108 m/s.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":"2 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141700884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1748-0221/19/07/p07011
S.D. Park, J. Lee, H. Lee, H.J. Kim
The Korea invisible mass search (KIMS) experiment used CsI(Tl) crystals coupled with photomultiplier tubes (PMTs) to detect signals from weakly interacting massive particles (WIMPs) at room temperature. It is expected that combining CsI(Tl) crystals with silicon photomultipliers (SiPMs) will enhance the detection performance. However, SiPMs must operate at low temperatures to reduce the dark count rate. In this study, we examined the temperature dependence of CsI(Tl) crystal properties, including light yield, α/β ratio, decay time, and pulse shape discrimination, before integrating it with a SiPM. The CsI(Tl) crystal was placed in a low-temperature chamber with a radiation source, and scintillation photons were detected by a PMT positioned outside the chamber. The response of CsI(Tl) to α-particles and γ-rays was examined across temperatures ranging from 10 K to 300 K.
韩国隐形质量搜索（KIMS）实验使用铯碘（Tl）晶体耦合光电倍增管（PMT）来探测室温下弱相互作用大质量粒子（WIMPs）的信号。预计将 CsI（Tl）晶体与硅光电倍增管（SiPM）相结合将提高探测性能。然而，硅光电倍增管必须在低温下工作，以降低暗计数率。在本研究中，我们在将铯碘(Tl)晶体与硅光电倍增管集成之前，研究了其特性（包括光产率、α/β 比、衰减时间和脉冲形状辨别）对温度的依赖性。将 CsI(Tl)晶体放置在一个带有辐射源的低温箱中，并通过放置在低温箱外的 PMT 检测闪烁光子。在 10 K 到 300 K 的温度范围内，对 CsI(Tl) 对 α 粒子和 γ 射线的响应进行了研究。
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