检索结果-内蒙古大学图书馆

Track Finding in CMS for the Level-1 Trigger at the HL-LHC

JOURNAL OF INSTRUMENTATION 2016年第3期11卷 C03011-C03011页

作者： Palla, F. Pesaresi, M. Ryd, A. Ist Nazl Fis Nucl Sez Pisa I-56127 Pisa Italy Univ London Imperial Coll Sci Technol & Med Blackett Lab Prince Consort Rd London SW7 2AZ England Cornell Univ Ithaca NY 14850 USA

The High Luminosity LHC (HL-LHC) will deliver luminosities of up to 5 x 10(34) Hz/cm(2), with an average of about 140 overlapping proton-proton collisions per bunch crossing. These extreme pileup conditions place stringent requirements on the trigger system to be able to cope with the resulting event rates. A key component of the CMS upgrade for HL-LHC is a track trigger system which would identify tracks with transverse momentum above 2 GeV/c already at the first-level trigger. This paper presents the status of proposals for implementing the L1 tracking in conjunction with the planned upgrade for the silicon tracker of the CMS experiment.

关键词： Trigger concepts and systems (hardware and software) Pattern recognition, cluster finding, calibration and fitting methods vertexing algorithms Trigger algorithms

来源：评论

学校读者我要写书评

暂无评论

The ATLAS Experiment at the CERN Large Hadron Collider

引用

JOURNAL OF INSTRUMENTATION 2008年第08期3卷 S08003-S08003页

作者： Aad, G. Abat, E. Abdallah, J. Abdelalim, A. A. Abdesselam, A. Abdinov, O. Abi, B. A. Abolins, M. Abramowicz, H. Acerbi, E. Acharya, B. S. Achenbach, R. Ackers, M. Adams, D. L. Adamyan, F. Addy, T. N. Aderholz, M. Adorisio, C. Adragna, P. Aharrouche, M. Ahlen, S. P. Ahles, F. Ahmad, A. Ahmed, H. Aielli, G. Akesson, P. F. Akesson, T. P. A. Alam, S. M. Albert, J. Albrand, S. Aleksa, M. Aleksandrov, I. N. Aleppo, M. Alessandria, F. Alexa, C. Alexander, G. Alexopoulos, T. Alimonti, G. Aliyev, M. Allport, P. P. Allwood-Spiers, S. E. Aloisio, A. Alonso, J. Alves, R. Alviggi, M. G. Amako, K. Amaral, P. Amaral, S. P. Ambrosini, G. Ambrosio, G. Amelung, C. Ammosov, V. V. Amorim, A. Amram, N. Anastopoulos, C. Anderson, B. Anderson, K. J. Anderssen, E. C. Andreazza, A. Andrei, V. Andricek, L. Andrieux, M-L. Anduaga, X. S. Anghinolfi, F. Antonaki, A. Antonelli, M. Antonelli, S. Apsimon, R. Arabidze, G. Aracena, I. Arai, Y. Arce, A. T. H. Archambault, J. P. Arguin, J-F Arik, E. Arik, M. Arms, K. E. Armstrong, S. R. Arnaud, M. Arnault, C. Artamonov, A. Asai, S. Ask, S. Asman, B. Asner, D. Asquith, L. Assamagan, K. Astbury, A. Athar, B. Atkinson, T. Aubert, B. Auerbach, B. Auge, E. Augsten, K. Aulchenko, V. M. Austin, N. Avolio, G. Avramidou, R. Axen, A. Ay, C. Azuelos, G. Baccaglioni, G. Bacci, C. Bachacou, H. Bachas, K. Bachy, G. Badescu, E. Bagnaia, P. Bailey, D. C. Baines, J. T. Baker, O. K. Ballester, F. Pedrosa, F. Baltasar Dos Santos Banas, E. Banfi, D. Bangert, A. Bansal, V. Baranov, S. P. Baranov, S. Barashkou, A. Barberio, E. L. Barberis, D. Barbier, G. Barclay, P. Bardin, D. Y. Bargassa, P. Barillari, T. Barisonzi, M. Barnett, B. M. Barnett, R. M. Baron, S. Baroncelli, A. Barone, M. Barr, A. J. Barreiro, F. da Costa, J. Barreiro Guimaraes Barrillon, P. Poy, A. Barriuso Barros, N. Bartheld, V. Bartko, H. Bartoldus, R. Basiladze, S. Bastos, J. Batchelor, L. E. Bates, R. L. Batley, J. R. Batraneanu, S. Battistin, M. Battistoni, G. Batusov, V. Bauer, F. Bauss, B. Baynham, D. E. Bazalova, M. Bazan, A. Beauchemin, P. H. Bea CERN CH-1211 Geneva 23 Switzerland Univ Alberta Albany NY 12222 USA Univ Alberta Dept Phys Ctr Particle Phys Edmonton AB T6G 2G7 Canada Fac Sci Dept Phys TR-061000 Ankara Turkey Azerbaijan Acad Sci Inst Phys AZ-143 Baku Azerbaijan Univ Autonoma Barcelona Inst Fis Altes Energies ES-08193 Barcelona Spain Univ Belgrade Inst Phys Belgrade 11001 Serbia Univ Bergen Dept Phys & Technol NO-5007 Bergen Norway Univ Calif Berkeley Lawrence Berkeley Lab Berkeley CA 94720 USA Univ Calif Berkeley Div Phys Berkeley CA 94720 USA Humboldt Univ Inst Phys D-12489 Berlin Germany Univ Bern High Energy Phys Lab CH-3012 Bern Switzerland Univ Birmingham Sch Phys & Astron Birmingham B15 2TT W Midlands England Bogazici Univ Dept Phys Fac Sci TR-80815 Bebek Turkey Ist Nazl Fis Nucl IT-40127 Bologna Italy Univ Bologna Dipartimento Fis IT-40127 Bologna Italy Univ Bonn Inst Phys D-53115 Bonn Germany Boston Univ Dept Phys Boston MA 02215 USA Brandeis Univ Dept Phys Waltham MA 02454 USA Brookhaven Natl Lab Dept Phys Upton NY 11973 USA Natl Inst Phys & Nucl Engn R-077125 Bucharest Romania Univ Buenos Aires FCEyN Dept Fis RA-1428 Buenos Aires DF Argentina Univ Cambridge Cavendish Lab Cambridge CB3 OHE England Carleton Univ Dept Phys Ottawa ON K1S 5B6 Canada Univ Chicago Enrico Fermi Inst Chicago IL 60637 USA Pontificia Univ Catolica Chile Fac Fis Dept Fis Santiago 22 Chile Univ Tecn Federico Santa Maria Dept Fis Valparaiso Chile Chinese Acad Sci Inst HEP CN-100049 Beijing Peoples R China USTC Dept Modern Phys CN-230026 Hefei Anhui Peoples R China Nanjing Univ Dept Phys CN-210093 Nanjing Peoples R China Shandong Univ HEP Grp CN-250100 Shadong Peoples R China Univ Blaise Pascal CNRS IN2P3 Phys Corpusculaire Lab FR-63177 Aubiere France Columbia Univ Nevis Lab Irvington NY 10533 USA Univ Copenhagen Niels Bohr Inst DK-2100 Copenhagen O Denmark Ist Nazl Fis Nucl Grp Collegato Cosenza IT-87036 Arcavacata Di Rende Italy Univ Calabria Dipartime

The ATLAS detector as installed in its experimental cavern at point 1 at CERN is described in this paper. A brief overview of the expected performance of the detector when the Large Hadron Collider begins operation is... 详细信息

关键词： ATLAS LHC CERN Accelerator Proton-proton collisions Heavy-ion collisions Minimum-bias events Bunch-crossings Pile-up Superconducting magnets Solenoidal field Toroidal field Magnetic field measurements Hall probes Inner detector Charged-particle tracking Vertex measurement Pixel detectors Silicon micro-strip detectors Transition radiation Time-over-threshold Radiation-hard electronics Fluorinert cooling Carbon-fibre reinforced plastics Optical fibres Calorimetry Sampling calorimeters Liquid argon Scintillator tiles Electromagnetic and hadronic interactions Forward calorimetry Accordion geometry Lateral segmentation Longitudinal segmentation Muon spectrometer Precision-tracking chambers Trigger chambers Drift tubes Thin-gap chambers Resistive-plate chambers Optical alignment systems Forward detectors Cerenkov light Roman Pots Zero-degree calorimetry Trigger and data acquisition High-level trigger Event filter Detector control system Bandwidth Processor farm Electrons Muons Leptons Photons Jets Taus Missing transverse energy b-tagging Particle identification Tracking algorithms vertexing algorithms Impact parameter measurements

来源：评论

学校读者我要写书评

暂无评论

Performance of the ATLAS forward proton Time-of-Flight detector in Run 2

引用

JOURNAL OF INSTRUMENTATION 2024年第5期19卷 P05054页

作者： Aad, G. Aakvaag, E. Abbott, B. Abeling, K. Abicht, N. J. Abidi, S. H. Aboulhorma, A. Abramowicz, H. Abreu, H. Abulaiti, Y. Acharya, B. S. Bourdarios, C. Adam Adamczyk, L. Addepalli, S. V. Addison, M. J. Adelman, J. Adiguzel, A. Adye, T. Affolder, A. A. Afik, Y. Agaras, M. N. Agarwala, J. Aggarwal, A. Agheorghiesei, C. Ahmad, A. Ahmadov, F. Ahmed, W. S. Ahuja, S. Ai, X. Aielli, G. Aikot, A. Tamlihat, M. Ait Aitbenchikh, B. Aizenberg, I. Akbiyik, M. Akesson, T. P. A. Akimov, A. V. Akiyama, D. Akolkar, N. N. Aktas, S. Al Khoury, K. Alberghi, G. L. Albert, J. Albicocco, P. Albouy, G. L. Alderweireldt, S. Alegria, Z. L. Aleksa, M. Aleksandrov, I. N. Alexa, C. Alexopoulos, T. Alfonsi, F. Algren, M. Alhroob, M. Ali, B. Ali, H. M. J. Ali, S. Alibocus, S. W. Aliev, M. Alimonti, G. Alkakhi, W. Allaire, C. Allbrooke, B. M. M. Allen, J. F. Allendes Flores, C. A. Allport, P. P. Aloisio, A. Alonso, F. Alpigiani, C. Alvarez Estevez, M. Fernandez, A. Alvarez Cardoso, M. Alves Alviggi, M. G. Aly, M. Amaral Coutinho, Y. Ambler, A. Amelung, C. Amerl, M. Ames, C. G. Amidei, D. Amirie, K. J. Amor Dos Santos, S. P. Amos, K. R. Ananiev, V. Anastopoulos, C. Andeen, T. Anders, J. K. Andrean, S. Y. Andreazza, A. Angelidakis, S. Angerami, A. Anisenkov, A. V. Annovi, A. Antel, C. Anthony, M. T. Antipov, E. Antonelli, M. Anulli, F. Aoki, M. Aoki, T. Aparisi Pozo, J. A. Aparo, M. A. Bella, L. Aperio Appelt, C. Apyan, A. Val, S. J. Arbiol Arcangeletti, C. Arce, A. T. H. Arena, E. Arguin, J-F. Argyropoulos, S. Arling, J. -H. Arnaez, O. Arnold, H. Artoni, G. Asada, H. Asai, K. Asai, S. Asbah, N. A. Assamagan, K. Astalos, R. Atashi, S. Atkin, R. J. Atkinson, M. Atmani, H. Atmasiddha, P. A. Augsten, K. Auricchio, S. Auriol, A. D. Austrup, V. A. Avolio, G. Axiotis, K. Azuelos, G. Babal, D. Bachacou, H. Bachas, K. Bachiu, A. Backman, F. Badea, A. Baer, T. M. Bagnaia, P. Bahmani, M. Bahner, D. Bai, K. Bailey, A. J. Bailey, V. R. Baines, J. T. Baines, L. Baker, O. K. Bakos, E. Gupta, D. Bakshi Balakrishnan, V. Balasubramanian, R. Baldin, E. M. Balek, Univ Adelaide Dept Phys Adelaide SA Australia Univ Alberta Dept Phys Edmonton AB Canada Ankara Univ Dept Phys Ankara Turkiye TOBB Univ Econ & Technol Div Phys Ankara Turkiye Univ Savoie Mt Blanc LAPP CNRS IN2P3 Annecy France Univ Paris Cite APC CNRS IN2P3 Paris France Argonne Natl Lab High Energy Phys Div 9700 S Cass Ave Argonne IL 60439 USA Univ Arizona Dept Phys Tucson AZ 85721 USA Univ Texas Arlington Dept Phys POB 19059 Arlington TX 76019 USA Natl & Kapodistrian Univ Athens Phys Dept Athens Greece Natl Tech Univ Athens Phys Dept Zografos Greece Univ Texas Austin Dept Phys Austin TX 78712 USA Azerbaijan Acad Sci Inst Phys Baku Azerbaijan Barcelona Inst Sci & Technol Inst Fis Altes Energies Barcelona Spain Chinese Acad Sci Inst High Energy Phys Beijing Peoples R China Tsinghua Univ Phys Dept Beijing Peoples R China Nanjing Univ Dept Phys Nanjing Peoples R China Sun Yat Sen Univ Sch Sci Shenzhen Campus Shenzhen Peoples R China Univ Chinese Acad Sci Beijing Peoples R China Univ Belgrade Inst Phys Belgrade Serbia Univ Bergen Dept Phys & Technol Bergen Norway Lawrence Berkeley Natl Lab Phys Div Berkeley CA USA Univ Calif Berkeley Berkeley CA 94720 USA Humboldt Univ Inst Phys Berlin Germany Univ Bern Albert Einstein Ctr Fundamental Phys Bern Switzerland Univ Bern Lab High Energy Phys Bern Switzerland Univ Birmingham Sch Phys & Astron Birmingham W Midlands England Bogazici Univ Dept Phys Istanbul Turkiye Gaziantep Univ Dept Phys Engn Gaziantep Turkiye Istanbul Univ Dept Phys Istanbul Turkiye Univ Antonio Narino Fac Ciencias Bogota Colombia Univ Antonio Narino Ctr Invest Bogota Colombia Univ Nacl Colombia Dept Fis Bogota Colombia Univ Bologna Dipartimento Fis & Astron A Righi Bologna Italy INFN Sez Bologna Bologna Italy Univ Bonn Phys Inst Bonn Germany Boston Univ Dept Phys 590 Commonwealth Ave Boston MA 02215 USA Brandeis Univ Dept Phys Waltham MA 02254 USA Transilvania Univ Brasov Brasov Roman

We present performance studies of the Time-of-Flight (ToF) subdetector of the ATLAS Forward Proton (AFP) detector at the LHC. Efficiencies and resolutions are measured using highstatistics data samples collected at low and moderate pile-up in 2017, the first year when the detectors were installed on both sides of the interaction region. While low efficiencies are observed, of the order of a few percent, the resolutions of the two ToF detectors measured individually are 21 ps and 28 ps, yielding an expected resolution of the longitudinal position of the interaction, z(vtx), in the central ATLAS detector of 5.3 +/- 0.6 mm. This is in agreement with the observed width of the distribution of the difference between..vtx measured independently by the central ATLAS tracker and by the ToF detector, of 6.0 +/- 2.0 mm.

关键词： Cherenkov detectors Performance of High Energy Physics Detectors Timing detectors vertexing algorithms

来源：评论

学校读者我要写书评

暂无评论

GPU enhancement of the trigger to extend physics reach at the LHC

引用

JOURNAL OF INSTRUMENTATION 2013年第10期8卷

作者： Halyo, V. Hunt, A. Jindal, P. LeGresley, P. Lujan, P. Princeton Univ Dept Phys Princeton NJ 08544 USA

Significant new challenges are continuously confronting the High Energy Physics (HEP) experiments, in particular the two detectors at the Large Hadron Collider (LHC) at CERN, where nominal conditions deliver proton-proton collisions to the detectors at a rate of 40 MHz. This rate must be significantly reduced to comply with both the performance limitations of the mass storage hardware and the capabilities of the computing resources to process the collected data in a timely fashion for physics analysis. At the same time, the physics signals of interest must be retained with high efficiency. The quest for rare new physics phenomena at the LHC leads to evaluation of a Graphics Processing Unit (GPU) enhancement for the existing High-Level Trigger (HLT), made possible by the current flexibility of the trigger system, which not only provides faster and more efficient event selection, but also includes the possibility of new complex triggers that were not previously feasible. A new tracking algorithm is evaluated on a NVIDIA Tesla K20c GPU, allowing for the first time the reconstruction of long-lived particles at the tracker system in the trigger. Preliminary time performance and efficiency will be presented.

关键词： Trigger concepts and systems (hardware and software) vertexing algorithms Trigger algorithms

来源：评论

学校读者我要写书评

暂无评论

A fast spatial resolution optimizing method for track-ion using a GEM detector based on the time information

引用

JOURNAL OF INSTRUMENTATION 2018年第12期13卷 P12015-P12015页

作者： Wu, H. Zhou, J. Yang, H. Lu, C. Zhao, X. Hu, B. Zhang, Y. Lanzhou Univ Sch Nucl Sci & Technol Lanzhou 730000 Gansu Peoples R China Chinese Acad Sci Inst Modern Phys Lanzhou 730000 Gansu Peoples R China Chinese Acad Sci Inst High Energy Phys Beijing 100049 Peoples R China

This work proposes a fast method of vertex reconstructing for incident ions in GEM detectors. Inspired by the Time Projection Chambers (TPC) approach, the time information of consecutive signal samples from Front End Electronics (FEE) is utilized. The method is demonstrated with a 2D-readout THGEM detector coupled with an APV-25 FEE. Using only one experimentally dependent parameter in the analysis, the proposed method resulted in a spatial resolution of 0.45 mm, compared to a value of 9.10 mm for the traditional center of gravity method.

关键词： Particle tracking detectors vertexing algorithms Pattern recognition cluster finding calibration and fitting methods Time projection chambers

来源：评论

学校读者我要写书评

暂无评论

Automatic tracking of the energy spectrum areas of Po-218 and Po-214 at various temperatures

引用

JOURNAL OF INSTRUMENTATION 2024年第2期19卷 T02017页

作者： Yuan, Shuai Xie, Ruomei Liu, Shuaibin Li, Huiying Yi, Haibo Sun, Jiale Liu, Zhipeng Wu, Jiulin Lin, Fen Hu, Tao Mo, Yixiang Yuan, Hongzhi Tan, Yanliang Hengyang Normal Univ Coll Phys & Elect Engn Hengyang 421008 Hunan Peoples R China

Radon and its decay products emit internal radiation in the respiratory system upon inhalation, which is a significant contributor to the development of lung cancer in humans. Accurate measurement of radon concentration is undoubtedly very important. Among the commonly used radon measurement methods, the electrostatic collection method stands out. This method involves counting the energy spectrum peaks of alpha particles, generated by the decay of radon daughters Po-218 and Po-214, which are collected on the surface of a semiconductor detector to determine radon concentration. According to experimental findings, measurements at different ambient temperatures cause Po-218 and Po-214 to peak drift. This drift adversely affects the accuracy of radon measurement using traditional methods. This study focuses on the characteristics of alpha-energy spectra from Po-218 and Po-214. It calculates the peak heights for all alpha-energy spectra and identifies the two peaks with the highest heights. Subsequently, an algorithm is developed to automatically track the peak positions of Po-218 and Po-214, accurately locating their counting intervals. The results demonstrate that the algorithm successfully achieves the desired outcomes through experiments conducted at different temperatures and measurement durations, thus validating its effectiveness. This method holds significant practical value in ensuring the accuracy of radon measurement.

关键词： vertexing algorithms Analysis and statistical methods Computing (architecture, farms, GRID for recording, storage, archiving, and distribution of data) Data processing methods

来源：评论

学校读者我要写书评

暂无评论

An optimization method of position resolution for gaseous thermal neutron detection based on time information

引用

JOURNAL OF INSTRUMENTATION 2021年第8期16卷

作者： He, Z. He, S. Wu, H. Xu, R. Hu, B. Zhang, Y. Yang, H. Lanzhou Univ Sch Nucl Sci & Technol 199 Donggang West Rd Lanzhou 730000 Peoples R China Chinese Acad Sci Inst Modern Phys 509 Nanchang Rd Lanzhou 730000 Peoples R China Chongqing Jianan Instrument Co Ltd 168 Nanping West Rd Chongqing 400060 Peoples R China

Micro Pattern Gaseous Detector (MPGD) is a promising and competitive technology for thermal neutron imaging, due to its many advantages such as high counting rate, low mass, irradiation resistance, and excellent position resolution. In order to further improve spatial resolution, a vertex reconstruction of neutron conversion tracks can be employed. Moreover, the accompanying gamma-ray background also has a significant impact on the detector performance. In this work, a detector for thermal neutron detection was developed based on GEMs, with a B4C-coated Mylar foil as the converter. Track reconstruction and vertex correction were achieved with additional use of the information of each signal. The rising time and energy were utilized to improve the track reconstruction furthermore. Finally, the spatial resolution was improved to 0.23mm from 1.01mm significantly for thermal neutron detection.

关键词： Micropattern gaseous detectors (MSGC, GEM, THGEM, RETHGEM MHSP, MICROPIC, MICROMEGAS, InGrid, etc) Neutron detectors (cold, thermal, fast neutrons) Particle tracking detectors (Gaseous detectors) vertexing algorithms

来源：评论

学校读者我要写书评

暂无评论

Improving primary-vertex reconstruction with a minimum-cost lifted multicut graph partitioning algorithm

引用

JOURNAL OF INSTRUMENTATION 2023年第7期18卷 P07013页

作者： Kostyukhin, V. Keuper, M. Ibragimov, I. Owtscharenko, N. Cristinziani, M. Univ Siegen Dept Phys Ctr Particle Phys Siegen Walter Flex Str 3 D-57072 Siegen Germany Univ Siegen Dept Elektrotech & Informat Holderlinstr 3 D-57076 Siegen Germany Max Planck Inst Informat Saarland Informat Campus E1 4 D-66123 Saarbrucken Germany

Particle physics experiments often require the simultaneous reconstruction of many interaction vertices. Usually, this problem is solved by ad hoc heuristic algorithms. We propose a universal approach to address the multiple vertex finding through a principled formulation as a minimum-cost lifted multicut problem. The suggested algorithm is tested in a typical LHC environment with multiple proton-proton interaction vertices. Reconstruction errors caused by the particle detectors complicate the solution and require the introduction of special metrics to assess the vertex-finding performance. We demonstrate that the minimum-cost lifted multicut approach outperforms heuristic algorithms and works well up to the highest vertex multiplicity expected at the LHC.

关键词： vertexing algorithms Pattern recognition cluster finding calibration and fitting methods

来源：评论

学校读者我要写书评

暂无评论

Firmware implementation of a displaced muon reconstruction algorithm for the Phase-2 Upgrade of the CMS muon system

引用

JOURNAL OF INSTRUMENTATION 2023年第12期18卷 C12005页

作者： Leguina, P. Univ Oviedo ICTEA Oviedo Spain

Displaced muons serve as a crucial indicator of novel physics extending beyond the standard model. Several theoretical frameworks posit the existence of muons with extended lifetimes, which can materialize through collisions at the LHC. This study presents the firmware implementation of an algorithm to reconstruct displaced muons using the Overlap Muon Track Finder (OMTF) of the CMS Level-1 Trigger System (L1T) targeting the High Luminosity Large Hadron Collider (HL-LHC). The firmware response is evaluated at the simulation level, comparing the results with those of the emulator, and then the algorithm is implemented on an FPGA.

关键词： Detector control systems (detector and experiment monitoring and slow-control systems architecture hardware algorithms databases) Trigger algorithms vertexing algorithms Digital electronic circuits

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：