Journal of Instrumentation最新文献_第2页

Development and verification of a Geant4 model of the electron beam mode in a clinical linear accelerator 开发并验证临床直线加速器电子束模式的 Geant4 模型

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 10.1088/1748-0221/19/07/c07007

I. Miloichikova, A. Bulavskaya, E. Bushmina, R. Dusaev, E. Gargioni, B. Gavrikov, A. Grigorieva, S. Stuchebrov

{"title":"Development and verification of a Geant4 model of the electron beam mode in a clinical linear accelerator","authors":"I. Miloichikova, A. Bulavskaya, E. Bushmina, R. Dusaev, E. Gargioni, B. Gavrikov, A. Grigorieva, S. Stuchebrov","doi":"10.1088/1748-0221/19/07/c07007","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/c07007","url":null,"abstract":"\u0000 At present, a significant number of studies are focused on the development of novel methodologies for the fabrication of dosimetry phantoms. One of these methods is to produce heterogeneous samples by 3D printing. In order to select the most appropriate parameters for such products, it is necessary to conduct numerical simulations. In this work, we developed the model of a beam-forming system using a medical linear accelerator as a reference. This model was used to determine simulation parameters and corresponding dose distributions of an electron beam with nominal energies of 6, 12, and 15 MeV in a homogeneous water phantom. These parameters were, in fact, adapted to provide maximum agreement between simulated distributions and those experimentally obtained with the clinical linear accelerator. The beam simulation was performed using the Geant4 Monte Carlo toolkit. The simulation geometry of the accelerator treatment head includes scattering foil and a flattening filter, which are designed for electron beam broadening. Additionally, the beam-forming system was incorporated to collimate the beam to the required size. A metal applicator was included to reduce the contribution of electron scattering in air. The main simulation parameters were iteratively tuned by comparing simulation results with experimentally obtained data. It is shown that the simulated percentage depth dose and transverse profiles for electron beams in water phantom are in good agreement with the experimental data obtained with a cylindrical ionization chamber. This demonstrates that the methodology employed in the development of the numerical model of the medical linear accelerator is vendor-independent, readily implementable, and allows for rapid calculations. Furthermore, the model can be applied for a variety of purposes, including the selection of parameters for the fabrication of heterogeneous dosimetry phantoms.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141850817","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}

引用次数: 0

Development of vertical test stand for SRF cavities at PAPS 在 PAPS 开发 SRF 腔体垂直测试台

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 10.1088/1748-0221/19/07/t07005

Lingxi Ye, Peng Sha, Z. Mi, Qun-Yao Wang, F. He, Rui Ge, Weimin Pan

引用次数: 0

Formation of medical radioisotope 111In in photonuclear reactions 在光子核反应中形成医用放射性同位素 111In

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 10.1088/1748-0221/19/07/c07010

T. Bakhshiyan, G. H. Hovhannisyan

引用次数: 0

Towards a RAG-based summarization for the Electron Ion Collider 实现基于 RAG 的电子离子对撞机总结

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 10.1088/1748-0221/19/07/c07006

Karthik Suresh, Neeltje Kackar, Luke Schleck, C. Fanelli

{"title":"Towards a RAG-based summarization for the Electron Ion Collider","authors":"Karthik Suresh, Neeltje Kackar, Luke Schleck, C. Fanelli","doi":"10.1088/1748-0221/19/07/c07006","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/c07006","url":null,"abstract":"\u0000 The complexity and sheer volume of information — encompassing documents, papers, data, and other resources — from large-scale experiments demand significant time and effort to navigate, making the task of accessing and utilizing these varied forms of information daunting, particularly for new collaborators and early-career scientists.\u0000To tackle this issue, a Retrieval Augmented Generation (RAG)-based Summarization AI for EIC (RAGS4EIC) is under development. This AI-Agent not only condenses information but also effectively references relevant responses, offering substantial advantages for collaborators. Our project involves a two-step approach: first, querying a comprehensive vector database containing all pertinent experiment information; second, utilizing a Large Language Model (LLM) to generate concise summaries enriched with citations based on user queries and retrieved data. We describe the evaluation methods that use RAG assessments (RAGAs) scoring mechanisms to assess the effectiveness of responses. Furthermore, we describe the concept of prompt template based instruction-tuning which provides flexibility and accuracy in summarization. Importantly, the implementation relies on LangChain [1], which serves as the foundation of our entire workflow. This integration ensures efficiency and scalability, facilitating smooth deployment and accessibility for various user groups within the Electron Ion Collider (EIC) community. This innovative AI-driven framework not only simplifies the understanding of vast datasets but also encourages collaborative participation, thereby empowering researchers. As a demonstration, a web application has been developed to explain each stage of the RAG Agent development in detail. The application can be accessed at https://rags4eic-ai4eic.streamlit.app.[A tagged version of the source code can be found in https://github.com/ai4eic/EIC-RAG-Project/releases/tag/AI4EIC2023_PROCEEDING.]","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141851898","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}

引用次数: 0

Current sensor unanticipated fault detection and compensation of 14.5-meter optical/infrared telescope drive system based on algebraic transformations 基于代数变换的 14.5 米光学/红外望远镜驱动系统的电流传感器意外故障检测与补偿

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 10.1088/1748-0221/19/07/p07012

Zhuangzhuang Deng, Shihai Yang, Yun Li, Lingzhe Xu, Cong Pan, Canyi Jiang, Yanpeng Guo

{"title":"Current sensor unanticipated fault detection and compensation of 14.5-meter optical/infrared telescope drive system based on algebraic transformations","authors":"Zhuangzhuang Deng, Shihai Yang, Yun Li, Lingzhe Xu, Cong Pan, Canyi Jiang, Yanpeng Guo","doi":"10.1088/1748-0221/19/07/p07012","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/p07012","url":null,"abstract":"\u0000 This paper discusses an unanticipated fault detection,\u0000 isolation, and compensation (FDIC) strategy for the arc splicing\u0000 permanent magnet synchronous motor (PMSM) operating under a\u0000 promising 14.5-meter optical/infrared telescope drive system,\u0000 specifically focusing on current sensors. The application is based\u0000 on algebraic transformations that allow not only failure detection\u0000 but also location and isolation. Besides, detection is performed\u0000 merely by means of the measured current sensors and does not require\u0000 additional knowledge or estimators; isolation utilizes information\u0000 provided by detection to locate where the faults originated and\u0000 release isolation signals; and compensation is carried out through\u0000 the remaining currents that are not affected by the faults. It is\u0000 noted from the results that the performance of FDIC in faulty mode\u0000 is very acceptable and uncompromising in terms of fault detection,\u0000 current symmetry, speed tracking, load torque and robustness\u0000 remedial measures. Therefore, the proposed method can effectively\u0000 ensure the stable operation of the drive system in the presence of\u0000 faults.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141696540","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}

引用次数: 0

Coherent X-ray radiation excited by a relativistic electron in a periodic layered medium 周期性层状介质中相对论电子激发的相干 X 射线辐射

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 10.1088/1748-0221/19/07/P07007

A. Noskov, S. Blazhevich

引用次数: 0

Calculation of efficiency and resolution of a hexagonal NaI(Tl) detector as a function of source position 计算六边形 NaI(Tl)探测器的效率和分辨率与源位置的函数关系

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 10.1088/1748-0221/19/07/t07003

A. Hamzawy, M. Badawi, I. Ruskov, D. Grozdanov, M.I. Badawi, A. Thabet, Y. Kopatch, N. Fedorov, B. A. Salem, Tangra collaboration

{"title":"Calculation of efficiency and resolution of a hexagonal NaI(Tl) detector as a function of source position","authors":"A. Hamzawy, M. Badawi, I. Ruskov, D. Grozdanov, M.I. Badawi, A. Thabet, Y. Kopatch, N. Fedorov, B. A. Salem, Tangra collaboration","doi":"10.1088/1748-0221/19/07/t07003","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/t07003","url":null,"abstract":"\u0000 Most gamma-ray scintillation detectors currently in use are made from inorganic materials that have a relatively high electron density. Quite often they are used to build multidetector systems that provide high scintillation light output. The performance of a gamma radiation detector (its detection efficiency) depends on the shape and size of the crystal, as well as on the source-to-detector geometry used. The NaI(Tl) gamma detector exhibits moderate energy resolution but relatively high gamma-ray detection efficiency and fast time response. In this work, the efficiency and resolution of a scintillation hexagonal detector are studied to optimize its response function. This type and size of scintillator were selected to construct a budget-friendly, reconfigurable, easy-to-maintain multidetector system for registering gamma-rays following fission, capture, and inelastic neutron scattering reactions, with reasonably good energy and time resolutions The research results made it possible to establish a geometric solid angle that increases the efficiency of recording gamma-ray radiation of the hexagonal NaI(Tl) scintillation probe under study.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141692107","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}

引用次数: 0

The Linac Extension Area at the Advanced Photon Source 先进光子源的里纳克扩展区

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 10.1088/1748-0221/19/07/T07002

K.P. Wootton, W. J. Berg, M. Borland, A. Brill, J.M. Byrd, S. Chitra, J. Collins, J. Dooling, J. Edwards, L. Erwin, G. Fystro, T.L. Grabinski, M.J. Henry, E. Heyeck, R. Keane, S.-H. Lee, J. Lenner, I. Lobach, A. Lumpkin, A. Puttkammer, V. Sajaev, N. Sereno, Y. Sun, J. Wang, S.Y.G. Wang, A.A. Zholents

引用次数: 0

A novel method to simulate radon exhalation rate with a solid Rn-222 source 用固体 Rn-222 源模拟氡呼出率的新方法

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 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

{"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":null,"pages":null},"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}

引用次数: 0

Status of edge electron density and temperature measurements with Helium Beam Emission Spectroscopy (He-BES) on EAST 利用 EAST 上的氦束发射光谱（He-BES）测量边缘电子密度和温度的情况

Journal of Instrumentation Pub Date : 2024-07-01 DOI: 10.1088/1748-0221/19/07/p07023

G. F. Ding, Y. Ye, R. Chen, G.S. Xu, Y. Yu, X. Lin, Q.Q. Yang, W. Zhang, Y. Li, N. Yan, S.C. Liu, L. Wang, T. Zhang, T.F. Zhou, D.G. Wu

{"title":"Status of edge electron density and temperature measurements with Helium Beam Emission Spectroscopy (He-BES) on EAST","authors":"G. F. Ding, Y. Ye, R. Chen, G.S. Xu, Y. Yu, X. Lin, Q.Q. Yang, W. Zhang, Y. Li, N. Yan, S.C. Liu, L. Wang, T. Zhang, T.F. Zhou, D.G. Wu","doi":"10.1088/1748-0221/19/07/p07023","DOIUrl":"https://doi.org/10.1088/1748-0221/19/07/p07023","url":null,"abstract":"\u0000 Helium Beam Emission Spectroscopy (He-BES) diagnostic has\u0000 been developed on EAST, which is able to measure the edge electron\u0000 density and temperature profiles simultaneously using a helium line\u0000 intensity ratio method. The diagnostic includes the beam injector\u0000 and the detection system. There are 20 observation channels within\u0000 an observation range of 80 mm in the detection system at the low\u0000 filed side, which can cover the whole scrape-off layer (SOL) and\u0000 part of the pedestal region of EAST. The beam injector system has\u0000 been upgraded to Supersonic Molecular Beam Injector (SMBI) system to\u0000 realize deeper helium injection since the 2021 campaign. Four\u0000 spectral lines at wavelengths of 728.1 nm, 706.5 nm, 667.8 nm and\u0000 656.3 nm are detected by the He-BES. The first three spectral\u0000 lines, including 728.1 nm, 706.5 nm, 667.8 nm, are measured for\u0000 calculating edge n\u0000 e and T\u0000 e profiles based on the\u0000 collisional-radiative model (CRM) model, and the last spectral line\u0000 (656.3 nm) is used for the measurement of D\u0000 α \u0000 emission. The edge electrostatic fluctuations can be obtained from\u0000 the power spectrum of D\u0000 α emission. The electron density\u0000 and temperature profiles calculated from the 667.8/728.1 and\u0000 728.1/706.5 nm line ratios are in good agreement with those from\u0000 other diagnostics in the edge region of plasma. The self-consistency\u0000 of He-BES diagnostic is also verified, such as the density pump out\u0000 caused by LHW and the lower edge temperature caused by the lower\u0000 heating power.","PeriodicalId":507814,"journal":{"name":"Journal of Instrumentation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841163","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}

引用次数: 0