2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)最新文献

Practical time mark estimators for multichannel digital silicon photomultipliers 实用的多通道数字硅光电倍增管时间标记估计器

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-12-31 DOI: 10.1109/NSSMIC.2015.7582138

E. Venialgo, S. Mandai, T. Gong, D. Schaart, E. Charbon

{"title":"Practical time mark estimators for multichannel digital silicon photomultipliers","authors":"E. Venialgo, S. Mandai, T. Gong, D. Schaart, E. Charbon","doi":"10.1109/NSSMIC.2015.7582138","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7582138","url":null,"abstract":"Multiple time-to-digital converters coupled with silicon photomultipliers allow to timestamp several light photons generated by a scintillation event. Multichannel digital silicon photomultipliers opened the possibility to estimate a gamma-photon time mark by using several photoelectrons timestamps. We studied the already-existing statistics models of pho-toeletron time-stamping generation, while extending the current models by adding the skipping effect. Which accounts for the inability of the system to timestamp a continuous set of photoelectrons. In addition, we proposed two multiple photoelectron timemark estimators based on the best linear unbiased and the maximum likelihood estimation methods. We calculated the Cramér Rao lower bound for several system parameter and compared it to the proposed estimators' performance. We concluded that under certain system configurations the proposed estimators are efficient. Moreover, we investigated the effect of dark count rate on the timing performance. Also, we introduced a filtering method that is based on measuring the time distance between adjacent timestamps. We performed a full Monte Carlo simulation to evaluate the proposed filter efficiency. Finally, we performed a full Monte Carlo simulation to compare the timemark estimators' performance. We concluded that the best linear unbiased estimator is as efficient as the maximum likelihood estimator. In addition, it was verified that multichannel digital silicon photomultipliers have a stronger tolerance to dark counts in comparison with current digital silicon photomultiplier architectures.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126882868","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: 1

Effects of high charge densities in multi-GEM detectors 高电荷密度对多gem探测器的影响

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-12-15 DOI: 10.1109/NSSMIC.2015.7581778

S. Franchino, D. González Díaz, R. Hall-Wilton, H. Muller, E. Oliveri, D. Pfeiffer, F. Resnati, L. Ropelewski, M. van Stenis, C. Streli, P. Thuiner, R. Veenhof

引用次数: 12

Architecture of the LHCb muon frontend control system upgrade LHCb介子前端控制系统架构升级

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-12-08 DOI: 10.1109/NSSMIC.2015.7581782

V. Bocci

{"title":"Architecture of the LHCb muon frontend control system upgrade","authors":"V. Bocci","doi":"10.1109/NSSMIC.2015.7581782","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581782","url":null,"abstract":"The LHCb experiment(Fig. 1), that is presently taking data at CERN (European Center for Nuclear Research) Large Hadron Collider (LHC), aims at the study of CP violation in the B meson sector. Its key elements is the Muon detector [1], which allows triggering, and muon identification from inclusive b decays. The electronic system (Fig. 2) of the whole detector is very complex and its Muon detector Experiment Control System (ECS) allows monitoring and control of a number of Front-End boards in excess of 7000. The present system in charge of controlling Muon detector Front-End (FE) Electronics consists of 10 Crates of equipment; each crate contains two kinds of modules: a Pulse Distribution Module (PDM) and up to 20 Service Boards (SB) connected via a custom Backplane for a total amount of about 800 microcontrollers[2]. LHCb upgrade is planned for 2018/19, which will allow the detector to exploit higher luminosity running. This upgrade will allow the experiment to accumulate more luminosity to allow measurements that are more precise. The main idea of the new architecture take advantage of the new CERN fast communication protocol GBT[3] developed for radiation environment leaving unchanged the huge connectivity to the detector and the modularity of the system. The new chipset GBTx and GBT-SCA[4] developed at CERN and the availability of more powerful computers allow designing a new system with fast link to the detector. In the new system, the control unit are moved from the apparatus to the computers in control room instead of the actual system where the low speed bus send high level commands to intelligent unit in the detector.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115169964","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: 3

Construction and test of new precision drift-tube chambers for upgrades of the ATLAS muon spectrometer in 2016/17 2016/17年ATLAS μ介子光谱仪升级新精密漂管室的建造和测试

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-12-07 DOI: 10.1109/NSSMIC.2015.7581880

H. Kroha, O. Kortner, F. Muller, S. Nowak, K. Schmidt-Sommerfeld

{"title":"Construction and test of new precision drift-tube chambers for upgrades of the ATLAS muon spectrometer in 2016/17","authors":"H. Kroha, O. Kortner, F. Muller, S. Nowak, K. Schmidt-Sommerfeld","doi":"10.1109/NSSMIC.2015.7581880","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581880","url":null,"abstract":"The Monitored Drift Tube (MDT) chambers of the ATLAS muon spectrometer demonstrated that they provide very precise and robust tracking over large areas. Goals of ATLAS muon detector upgrades are to increase the acceptance for precision muon momentum measurement and triggering and to improve the rate capability of the muon chambers in the high-background regions when the LHC luminosity increases. Small-diameter Muon Drift Tube (sMDT) chambers have been developed for these purposes. With half the drift-tube diameter of the MDT chambers and otherwise unchanged operating parameters, sMDT chambers share the advantages with the MDTs, but have an order of magnitude higher rate capability and can be installed in detector regions where MDT chambers do not fit in. The chamber assembly methods have been optimized for mass production, reducing cost and construction time considerably and improving the the sense wire positioning accuracy to better than ten microns. The construction of twelve chambers for the feet regions of the ATLAS detector is currently ongoing with the goal to install them in the winter shutdown 2016/17 of the LHC. Design and construction of the new sMDT chambers for ATLAS are discussed as well as measurements of their mechanical precision.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128648551","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: 1

The data quality monitoring challenge at CMS: Experience from first collisions and future plans CMS的数据质量监控挑战:首次碰撞的经验和未来计划

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-12-04 DOI: 10.1109/NSSMIC.2015.7581873

F. Guio

引用次数: 3

Performance of several solid state photomultipliers with CLYC scintillator 几种具有CLYC闪烁体的固态光电倍增管的性能

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-12-03 DOI: 10.1109/NSSMIC.2015.7581936

K. Mesick, L. Stonehill, J. Morrell, D. Coupland

引用次数: 14

R&D of commercially manufactured large GEM foils 商用大型GEM箔的研发

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-11-27 DOI: 10.1109/NSSMIC.2015.7581802

M. Posik, B. Surrow

{"title":"R&D of commercially manufactured large GEM foils","authors":"M. Posik, B. Surrow","doi":"10.1109/NSSMIC.2015.7581802","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581802","url":null,"abstract":"Many experiments are currently using or proposing to use large area GEM foils in their detectors, which is creating a need for commercially available GEM foils. Currently CERN is the only main distributor of GEM foils, however with the growing interest in GEM technology keeping up with the increasing demand for GEM foils will be difficult. Thus the commercialization of GEM foils has been established by Tech-Etch Inc. of Plymouth, MA, USA using the single-mask technique, which is capable of producing GEM foils over a meter long. To date Tech-Etch has successfully manufactured 10 × 10 cm2 and 40 × 40 cm2 GEM foils. We will report on the electrical and geometrical properties, along with the inner and outer hole diameter size uniformity of these foils. Furthermore, Tech-Etch has now begun producing even larger GEM foils of 50 × 50 cm2, and are currently looking into how to accommodate GEM foils on the order of one meter long. The Tech-Etch foils were found to have excellent electrical properties. The measured mean optical properties were found to reflect the desired parameters and are consistent with those measured in double-mask GEM foils, as well as single-mask GEM foils produced at CERN. They also show good hole diameter uniformity over the active area.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128593178","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: 2

Monte Carlo simulations and benchmark studies at CERN's accelerator chain 蒙特卡罗模拟和欧洲核子研究中心加速器链的基准研究

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-11-26 DOI: 10.1109/NSSMIC.2015.7581833

J. Saraiva, M. Brugger

引用次数: 2

The silicon vertex tracker for the heavy photon search experiment 用于重光子搜索实验的硅顶点跟踪器

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-11-24 DOI: 10.1109/NSSMIC.2015.7581862

P. H. Adrian

{"title":"The silicon vertex tracker for the heavy photon search experiment","authors":"P. H. Adrian","doi":"10.1109/NSSMIC.2015.7581862","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581862","url":null,"abstract":"The Heavy Photon Search (HPS) is a new, dedicated experiment at Thomas Jefferson National Accelerator Facility (JLab) to search for a massive vector boson, the heavy photon (a.k.a. dark photon, A), in the mass range 20-500 MeV/c2 and with a weak coupling to ordinary matter. An A' can be radiated from an incoming electron as it interacts with a charged nucleus in the target, accessing a large open parameter space where the A' is relatively long-lived, leading to displaced vertices. HPS searches for these displaced A' to e+e- decays using actively cooled silicon microstrip sensors with fast readout electronics placed immediately downstream of the target and inside a dipole magnet to instrument a large acceptance with a relatively small detector. With typical particle momenta of 0.5-2 GeV/c, the low material budget of 0.7% Xo per tracking layer is key to limiting the dominant multiple scattering uncertainty and allowing efficient separation of the decay vertex from the prompt QED trident background processes. Achieving the desired low-mass acceptance requires placing the edge of the silicon only 0.5 mm from the electron beam. This results in localized hit rates above 4 MHz/mm2 and radiation levels above 1014 1 MeV neutron equivalent /cm2 dose. Hit timing at the ns level is crucial to reject out-of time hits not associated with the A' decay products from the almost continuous CEBAF accelerator beam. To avoid excessive beam-gas interactions the tracking detector is placed inside the accelerator beam vacuum envelope and is retractable to allow safe operation in case of beam motion. This contribution will discuss the design, construction and first performance results from the first data-taking period in the spring of 2015.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131867598","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: 5

R&D on GEM detectors for forward tracking at a future Electron-Ion Collider 用于未来电子-离子对撞机前向跟踪的GEM探测器的研发

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-11-24 DOI: 10.1109/NSSMIC.2015.7581965

A. Zhang, V. Bhopatkar, M. Hohlmann, X. Bai, K. Gnanvo, N. Liyanage, M. Posik, B. Surrow

{"title":"R&D on GEM detectors for forward tracking at a future Electron-Ion Collider","authors":"A. Zhang, V. Bhopatkar, M. Hohlmann, X. Bai, K. Gnanvo, N. Liyanage, M. Posik, B. Surrow","doi":"10.1109/NSSMIC.2015.7581965","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581965","url":null,"abstract":"We report the status of R&D on large triple-GEM detectors for a forward tracker (FT) in an experiment at a future Electron Ion Collider (EIC) that will improve our understanding of QCD. We have designed a detector prototype specifically targeted for the EIC-FT, which has a trapezoidal shape with 30.1° opening angle. We are investigating different detector assembly techniques and signal readout technologies, but have designed a common GEM foil to minimize NRE cost for foil production. The assembly techniques comprise either a purely mechanical method including foil stretching as pioneered by CMS but with certain modifications, or gluing foils to frames that are then assembled mechanically, or gluing foils to frames that are then glued together. The first two assembly techniques allow for re-opening chambers so that a GEM foil can be replaced if it is damaged. For readout technologies, we are pursuing a cost-effective one-dimensional readout with wide zigzag strips that maintains reasonable spatial resolution, as well two-dimensional readouts - one with stereo-angle (u-v) strips and another with r-φ strips. In addition, we aim at an overall low-mass detector design to facilitate good energy resolution for electrons scattered at low momenta. We present design for GEM foils and other detector parts, which we plan to entirely acquire from U.S. companies.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122752831","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: 7