2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)最新文献_第3页

Hamamatsu PMT R7056 study for the extinction monitoring system of the Mu2e experiment at Fermilab Fermilab Mu2e实验消光监测系统的Hamamatsu PMT R7056研究

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-11-06 DOI: 10.1109/NSSMIC.2015.7581871

S. Boi, A. Dyshkant, D. Hedin, E. Johnson, E. Prebys, P. Rubinov

引用次数: 0

Precision electromagnetic calorimetry at the highest energy and intensity proton-proton collider: CMS ECAL performance at LHC Run 2 and prospects for high luminosity LHC 在最高能量和强度的质子-质子对撞机上的精密电磁量热:CMS - ECAL在LHC Run 2上的性能及高亮度LHC的前景

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-11-05 DOI: 10.1109/NSSMIC.2015.7581771

A. Massironi

{"title":"Precision electromagnetic calorimetry at the highest energy and intensity proton-proton collider: CMS ECAL performance at LHC Run 2 and prospects for high luminosity LHC","authors":"A. Massironi","doi":"10.1109/NSSMIC.2015.7581771","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581771","url":null,"abstract":"The electromagnetic calorimeter (ECAL) of the Compact Muon Solenoid Experiment (CMS) started operating at the Large Hadron Collider (LHC) in Spring 2015 with proton-proton collisions at 13 TeV center-of-mass energy and at a reduced bunch spacing of 25 ns. The instantaneous luminosity during LHC Run 2 is expected to exceed the levels achieved in LHC Run 1 significantly. In this talk we present new reconstruction algorithms and calibration strategies to maintain the superb performance of the CMS ECAL under these challenging conditions. We will show first performance results from the 2015 data taking period and give an outlook on the foreseen performance for Run 2. The current Run 2 of LHC is expected to accumulate a few hundred inverse femtobarn of proton-proton collisions before LHC will be upgraded to provide an even higher instantaneous luminosity, referred to as High-Luminosity LHC (HL-LHC). HL-LHC is expected to provide a few inverse attobarn of integrated luminosity. This will result in even higher rates of simultaneous proton-proton collisions, called pile-up (PU), up to and exceeding 140 PU collisions. Likewise the physics event rates will increase further which requires upgrades to the readout and trigger electronics of the existing ECAL. We will briefly discuss the upgrade plans and present in detail the plans to combat the PU under these conditions. One promising technique is based on the very good time resolution the CMS ECAL provides. We present the current status of timing performance of the CMS ECAL, plans to improve this for the future and examples of how this can be used for PU mitigation.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131512768","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

Graph-based decision making for task scheduling in concurrent Gaudi 基于图的并行高迪任务调度决策

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-11-03 DOI: 10.1109/NSSMIC.2015.7581843

I. Shapoval, M. Clemencic, B. Hegner, Daniel Funke, D. Piparo, P. Mato

{"title":"Graph-based decision making for task scheduling in concurrent Gaudi","authors":"I. Shapoval, M. Clemencic, B. Hegner, Daniel Funke, D. Piparo, P. Mato","doi":"10.1109/NSSMIC.2015.7581843","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581843","url":null,"abstract":"The modern trend of extensive levels of hardware parallelism and heterogeneity pushes software to evolve through a paradigm shift towards concurrent data processing architectures. One such striking example in the domain of high-energy physics is represented by Gaudi - an experiment independent software framework, used in two of four major experiments of the Large Hadron Collider project, and in several others. The framework is responsible for event processing by means of hundreds of algorithms which have logical and data dependencies between each other. Historically, the framework was designed being inherently sequential, meaning that at any time of data processing there is only one event being processed and only one algorithm being executed on it. This allowed to respect the dependencies of algorithms by just organizing them in a well-defined execution path to be run on CPU. The evolution of the Gaudi framework into its concurrent incarnation, though, implies the necessity to split the execution path dynamically into subsets of algorithms to fill up efficiently the available computing resources. In this work we present a graph-based decision making system as a solution to the problem. The approach allows to form and control dynamically the order of concurrent algorithms' execution, restricted by the topology of their dependencies of any complexity level. Furthermore, we show the system's capability of configuration- and run-time planning for optimal resource usage, and discuss a few concrete scheduling strategies, that this approach exposes.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115598441","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

RadICAL stack: A localisation method for dynamic gamma/neutron fields 激进堆栈:动态伽马/中子场的局部化方法

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-31 DOI: 10.1109/NSSMIC.2015.7581900

G. Randall, M. Ellis, K. Duroe, A. Jones, M. Joyce, C. Payne, P. Sellin, R. Speller

{"title":"RadICAL stack: A localisation method for dynamic gamma/neutron fields","authors":"G. Randall, M. Ellis, K. Duroe, A. Jones, M. Joyce, C. Payne, P. Sellin, R. Speller","doi":"10.1109/NSSMIC.2015.7581900","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581900","url":null,"abstract":"A variation of the RadICAL (Radiation Imaging Cylinder Activity Locator) system capable of operating in a dynamic environment, such as that created by active interrogation techniques, has been developed. RadICAL is a novel method for locating a radiological source using a rotating detector element. The detector geometry is that of a thin sheet and is rotated to present a constantly changing surface area to the source; it therefore generates a characteristic temporal response which can be used to determine the source direction. The time required to determine the direction of a source make it unsuitable for dynamic environments and so an alternative method is presented that uses a stack of identical scintillator slabs positioned at fixed horizontal angles around a central axis. By comparing count rates from each slab to a standard response curve, using a specially developed algorithm, the direction of a source can be determined without the need to rotate the detector. EJ-299-33 plastic scintillator was used to allow detection of separate neutron and gamma events in a mixed field through pulse shape discrimination. A four element detector was built and shown to achieve a positional accuracy of approximately 4.4 degrees when exposed to a 1.44MBq 137 Cs source at distances of up to 2m. The same detector was used to discriminate separate neutron and gamma events in a mixed field, which allows for the possibility of locating a neutron source within a gamma rich environment.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132776378","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

Breakdown voltage and triggering probability of SiPM from IV curves 从IV曲线看SiPM的击穿电压和触发概率

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-31 DOI: 10.1109/NSSMIC.2015.7581735

A. Nagai, N. Dinu, A. Para

引用次数: 2

The ClearPET/XPAD prototype: Development of a simultaneous PET/CT scanner for mice ClearPET/XPAD原型:开发用于小鼠的同时PET/CT扫描仪

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-31 DOI: 10.1109/NSSMIC.2015.7582074

M. Hamonet, M. Dupont, T. Fabiani, F. Cassol, Y. Boursier, A. Bonissent, F. Debarbieux, G. Pottier, L. Bidaut, C. Morel

引用次数: 0

Neutron/gamma pulse shape discrimination in EJ-299-34 at high flux 高通量下ejj -299-34中子/伽马脉冲形状判别

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-31 DOI: 10.1109/NSSMIC.2015.7581994

C. Payne, P. Sellin, M. Ellis, K. Duroe, A. Jones, M. Joyce, G. Randall, R. Speller

引用次数: 13

Mechanically stable metal layers for ohmic and blocking contacts on CdZnTe detectors by electroless deposition 化学沉积用于CdZnTe探测器欧姆和阻塞接触的机械稳定金属层

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7582259

M. Bettelli, G. Benassi, L. Nasi, N. Zambelli, A. Zappettini, E. Gombia, L. Abbene, F. Principato, D. Calestani

引用次数: 1

Reconstruction of the spatial distribution of radioactive contamination from aerial survey and from a stationary array of directional detectors 从航空测量和固定方向探测器阵列重建放射性污染的空间分布

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7581989

Laurel E. Sinclair, F. A. Marshall, R. Fortin

{"title":"Reconstruction of the spatial distribution of radioactive contamination from aerial survey and from a stationary array of directional detectors","authors":"Laurel E. Sinclair, F. A. Marshall, R. Fortin","doi":"10.1109/NSSMIC.2015.7581989","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581989","url":null,"abstract":"Natural Resources Canada has responsibility for mobile survey in response to radiological emergencies in Canada. The team maintains both aerial and truckborne survey systems based on large volume NaI(Tl) gamma detectors integrated with instrumentation for position detection and for environmental monitoring. The team must be able to map the activity concentration of an extended source, whether arising from the detonation of a radiological dispersal device, or a nuclear power plant accident. We have developed novel methods to treat both aerial and truckborne mobile survey datasets. A deconvolution method applied to aerial survey data results in a finer spatial resolution of the measurement. In the truckborne setup, four detectors are oriented vertically in a self-shielding configuration to provide an azimuthal direction reading. In a first step toward development of a method for spatial inversion of truckborne survey results, we have treated a mobile traverse with one system in different locations at different times as a stationary array of multiple systems in different locations at one time. A spatial inversion method then allows for extrapolation of the activity concentration measurement to positions a distance from the traverse. Here, we present these two new methods for spatial reconstruction, and show results for distributed radioactivity from synthetic data.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121019788","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

Study of event topology for a new fast primary vertex finder for the ATLAS trigger 一种新的ATLAS触发器快速主顶点查找器的事件拓扑研究

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI: 10.1109/NSSMIC.2015.7581919

R. Langenberg

{"title":"Study of event topology for a new fast primary vertex finder for the ATLAS trigger","authors":"R. Langenberg","doi":"10.1109/NSSMIC.2015.7581919","DOIUrl":"https://doi.org/10.1109/NSSMIC.2015.7581919","url":null,"abstract":"This document presents a transform-based approach to primary signal vertex finding feasibility analysis. An algorithm to find primary vertices has been developed using only Inner Detector measurements. Based on the information available to the algorithm, a metric has been developed to identify the signal vertex. The feasibility analysis demonstrates the theoretical distinguishability of different signal events and pileup with this metric. The results show that the majority of event types are easily distinguished. The algorithm can be used in the high level trigger. At this stage of computation, event types can be identified with the trigger information, such that this algorithm can be chosen only for appropriate events. An implementation of the algorithm is used to run simulations with increasingly realistic scenarios. This allows the quantification of the algorithm performance and to attribute inefficiencies to specific effects. In the most realistic scenario, the distinction rate reduces only by a small margin, remaining higher than 90% for events with good results in the feasibility analysis, also for high pileup scenarios. Countermeasures are presented for the effects reducing efficiency.","PeriodicalId":106811,"journal":{"name":"2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121058592","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