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Implementation of a double trigger condition system based on charge comparison and TOF measurement for the NEDA detector array

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Nuclear Science and Techniques 2025年第2期36卷 40-48页

作者： J.M.Deltoro A.Goasduff F.J.Egea V.González A.Gadea R.M.pérez-Vidal I.Lazarus M.Kogimtzis L.McNicholl M.palacz G.Jaworski J.J.Valiente-Dobón J.Nyberg S.Casans A.E.Navarro-Antón E.Sanchis A.Boujrad E.Clément T.Hüyük R.Illicachi O.Stezowski V.Modamio Department of Electronic Engineering University of ValenciaBurjassotValenciaSpain Istituto Nazionale di Fisica Nucleare Laboratori Nazionali di LegnaroLaboratori Nazionali di LegnaroLegnaroPadovaItaly Instituto de Física Corpuscular CSIC-Universidad de ValenciaCSIC-Universidad de Valencia46980 PaternaValenciaSpain Science and Technology Facilities Council DaresburyUK Heavy Ion Laboratory University of Warsaw02-093 WarsawPoland Department of physics and Astronomy Uppsala UniversityUppsalaSweden Grand Accélérateur National d’Ions Lourds(GANIL) CEA/DRF-CNRS/IN2P3CEA/DRF-CNRS/IN2P3CaenFrance univ.rsitéde Lyon UniversitéLyon-1CNRS/IN2P3UMR5822IP2IIP2I4 Rue Enrico Fermi69622 Villeurbanne CedexFrance Department of physics University of Oslo0316 OsloNorway

The NEutron Detector Array(NEDA)is designed to be coupled to gamma-ray spectrometers to enhance the sensitivity of the setup by enabling reaction channel selection through counting of the evaporated *** article presents the implementation of a double trigger condition system for NEDA,which improves the acquisition of neutrons and reduces the number of gamma rays *** independent triggers are generated in the double trigger condition system:one based on charge comparison(CC)and the other on time-of-flight(TOF).These triggers can be combined using OR and AND logic,offering four distinct trigger *** developed firmware is added to the previous one in the Virtex 6 field programmable gate array(FpGA)present in the system,which also includes signal processing,baseline correction,and various trigger logic *** performance of the trigger system is evaluated using data from the E703 experiment performed at *** four trigger modes are applied to the same data,and a subsequent offline analysis is *** is shown that most of the detected neutrons are preserved with the AND mode,and the total number of gamma rays is significantly *** with the CC trigger mode,the OR trigger mode allows increasing the selection of *** addition,it is demonstrated that if the OR mode is selected,the online CC trigger threshold can be raised without losing neutrons.

关键词： Neutron detector Neutron-gamma discrimination pulse shape analysis Time-of-flight Charge comparison

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Reconstruction of pile-up events using a one-dimensional convolutional autoencoder for the NEDA detector array

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Nuclear Science and Techniques 2025年第2期36卷 62-70页

作者： J.M.Deltoro G.Jaworski A.Goasduff V.González A.Gadea M.palacz J.J.Valiente-Dobón J.Nyberg S.Casans A.E.Navarro-Antón E.Sanchis G.de Angelis A.Boujrad S.Coudert T.Dupasquier S.Ertürk O.Stezowski R.Wadsworth Department of Electronic Engineering University of ValenciaBurjassotValenciaSpain Heavy Ion Laboratory University of Warsaw02-093 WarsawPoland Istituto Nazionale di Fisica Nucleare Laboratori Nazionali di LegnaroLegnaroItaly Instituto de Física Corpuscular CSIC-Universidad de Valencia46980 PaternaValenciaSpain Department of physics and Astronomy Uppsala UniversityUppsalaSweden GANIL CEA/DRF-CNRS/IN2P3Bvd.Henri Becquerel14076 CaenFrance cnrs IN2P3IPN LyonUniversitéLyon 169622 VilleurbanneFrance Department of physics Nigde Omer Halisdemir University51240 NigdeTurkey Department of physics University of YorkHeslingtonYork YO105DDUK

pulse pile-up is a problem in nuclear spectroscopy and nuclear reaction studies that occurs when two pulses overlap and distort each other,degrading the quality of energy and timing *** methods have been used for pile-up rejection,both digital and analogue,but some pile-up events may contain pulses of interest and need to be *** paper proposes a new method for reconstructing pile-up events acquired with a neutron detector array(NEDA)using an one-dimensional convolutional autoencoder(1D-CAE).The datasets for training and testing the 1D-CAE are created from data acquired from the *** new pile-up signal reconstruction method is evaluated from the point of view of how similar the reconstructed signals are to the original ***,it is analysed considering the result of the neutron-gamma discrimination based on charge comparison,comparing the result obtained from original and reconstructed signals.

关键词： 1D-CAE Autoencoder CAE Convolutional neural network(CNN) Neutron detector Neutron-gamma discrimination(NGD) Machine learning pulse shape discrimination pile-up pulse

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Simulation of beam size multiknobs correction at the Accelerator Test Facility 2 at KEK

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Chinese physics C 2011年第4期35卷 397-401页

作者：白莎 B. Bolzon p. Bambade 高杰 Institute of High Energy physics CAS LApp cnrs/in2p3 LAL univ.paris-Sud cnrs/in2p3

The ATF2 project is the final focus system prototype for the ILC and CLIC linear collider projects, with a purpose of reaching a 37 nm vertical beam size at the interaction point （Ip）. During the initial commissioning, we started with larger-than-nominal β-functions at the Ip in order to reduce the effects from higher-order optical aberrations and thereby simplifying the optical corrections needed. We report on the simulation studies at two different Ip locations developed based on waist scan, dispersion, coupling and β function multiknobs correction in the large β optics of ATF2, in the presence of two kinds of magnet inaccuracies （quadrupole gradient and roll errors） to generate all possible linear optic distortions at the Ip. A vertical beam size which is very close to the nominal beam size is obtained based on the simulation study.

关键词： ATF2 beam size multiknobs simulation

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SUSY searches at ATLAS

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Frontiers of physics 2013年第3期8卷 248-256页

作者： pascal pralavoriot CppM University Aix-Marseille and CNRS/IN2P3 Marseille France

Despite the absence of experimental evidence, weak scale supersymmetry remains one of the best motivated and studied Standard Model extensions. The ATLAS experiment at the LHC searches for signs of supersymmetry in a large variety of signatures involving events with abnormal production of missing transverse momentum, jets, leptons, third generation fermions, gauge bosons or massive long-lived particles. A summary of the most recent results obtained in these searches is presented.

关键词： supersymmetry (SUSY) ATLAS LHC

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propagation of a beam halo in accelerator test facility 2 at KEK

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Chinese physics C 2013年第5期37卷 81-84页

作者：白莎 p. Bambade 高杰 Institute of High Energy physics (IHEp) LAL Univ Paris-SudCNRS/IN2P3

The beam halo is a major issue for interaction region （IR） backgrounds at many colliders, for example, future linear colliders, B factories, and also it is an important problem at ATF2. In this paper, we report on the halo propagation along the ATF2 beam line with realistic apertures, the nonlinear optics influence on the increasing number of halo particles input is analyzed, and the transmitted halo particles distribution just before the last BpM is then described, the results from which will benefit the Compton recoil electrons measurement.

关键词： ATF2 beam halo Compton scattering Shintake monitor

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In situ cosmogenic ^(10)Be dating of the Quaternary glaciations in the southern Shaluli Mountain on the Southeastern Tibetan plateau

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Science China Earth Sciences 2006年第12期49卷 1291-1298页

作者： Raisbeck Grand Yiou Francios Centre de Spectrometric Nucleaire et de Specmetric de Masse IN2P3 CNRS Bat.10891405 Campus Orsay France

It is generally considered that four-times ice age happened during the Quaternary epoch on the Tibetan plateau. However, the research on the chronology of the four-times ice age is far from enough. The Shaluli Mountain on the Southeastern Tibetan plateau is an ideal place for plaeo-glacier study, because there are abundant Quaternary glacial remains there. This paper discusses the ages of the Quaternary glaciations, based on the exposure dating of roche moutonnée, moraines and gla- cial erosion surfaces using in situ cosmogenic isotopes 10Be. It is found that the exposure age of the roche moutonnée at Tuershan is 15 ka, corresponding to Stage 2 of the deep-sea oxygen isotope, suggesting that the roche moutonnée at Tuershan is formed in the last glacial maximum. The expo- sure age of glacial erosion surface at Laolinkou is 130―160 ka, corresponding to Stage 6 of the deep-sea oxygen isotope. The oldest end moraine at Kuzhaori may form at 421―766 kaBp, corre- sponding to Stages 12―18 of the deep-sea oxygen isotope. In accordance with the climate charac- teristic of stages 12,14,16 and 18 reflected by the deep-sea oxygen isotope, polar ice cores and loess sequence, the oldest end moraine at Kuzhaori may form at stage 12 or stage 16, the latter is more possible.

关键词： Quaternary,glaciation,glacial,cosmogenic isotope,dating,10Be,exposure dating,Tibetan plateau,environmental change,surface dating,boulder,erosion.

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prediction of energy resolution in the JUNO experiment

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Chinese physics C 2025年第1期49卷 35-59页

作者： Angel Abusleme Thomas Adam Kai Adamowicz Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Fengpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Joao pedro Athayde Marcondes de André Didier Auguste Weidong Bai Nikita Balashov Wander Baldini Andrea Barresi Davide Basilico Eric Baussan Marco Bellato Marco Beretta Antonio Bergnoli Daniel Bick Lukas Bieger Svetlana Biktemerova Thilo Birkenfeld Iwan Blake David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Jose Busto Anatael Cabrera Barbara Caccianiga Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Stéphane Callier Steven Calvez Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Vanessa Cerrone Jinfan Chang Yun Chang Auttakit Chatrabhuti Chao Chen Guoming Chen pingping Chen Shaomin Chen Xin Chen Yiming Chen Yixue Chen Yu Chen Zelin Chen Zhangming Chen Zhiyuan Chen Zikang Chen Jie Cheng Yaping Cheng YuChin Cheng Alexander Chepurnov Alexey Chetverikov Davide Chiesa pietro Chimenti Yen-Ting Chin po-Lin Chou Ziliang Chu Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Marta Colomer Molla Selma Conforti Di Lorenzo Alberto Coppi Daniele Corti Simon Csakli Chenyang Cui Flavio Dal Corso Olivia Dalager Jaydeep Datta Christophe De La Taille Zhi Deng Ziyan Deng Xiaoyu Ding Xuefeng Ding Yayun Ding Bayu Dirgantara Carsten Dittrich Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng Dong Evgeny Doroshkevich Wei Dou Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Katherine Dugas Stefano Dusini Hongyue Duyang Jessica Eck Timo Enqvist Andrea Fabbri Ulrike Fahrendholz Lei Fan Jian Fang Wenxing Fang Dmitry Fedoseev Li-Cheng Feng Qichun Feng Federico Ferraro Amélie Fournier Fritsch Fritsch Haonan Gan Feng Gao Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Marco Grassi Maxim Gromov Vasily Gromov Minghao G Yerevan physics Institute YerevanArmenia univ.rsité Libre de Bruxelles BrusselsBelgium univ.rsidade Estadual de Londrina LondrinaBrazil pontificia univ.rsidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Millennium Institute for SubAtomic physics at the High-energy Frontier(SApHIR) ANIDChile pontificia univ.rsidad Católica de Chile SantiagoChile Beijing Institute of Spacecraft Environment Engineering BeijingChina Beijing Normal univ.rsity BeijingChina China Institute of Atomic Energy BeijingChina Institute of High Energy physics BeijingChina North China Electric power univ.rsity BeijingChina School of physics Peking UniversityBeijingChina Tsinghua univ.rsity BeijingChina univ.rsity of Chinese Academy of Sciences BeijingChina Jilin univ.rsity ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing univ.rsity ChongqingChina Dongguan univ.rsity of Technology DongguanChina Jinan univ.rsity GuangzhouChina Sun Yat-sen univ.rsity GuangzhouChina Harbin Institute of Technology HarbinChina univ.rsity of Science and Technology of China HefeiChina The Radiochemistry and Nuclear Chemistry Group in univ.rsity of South China HengyangChina Wuyi univ.rsity JiangmenChina Shandong univ.rsity JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina Nanjing univ.rsity NanjingChina Guangxi univ.rsity NanningChina East China univ.rsity of Science and Technology ShanghaiChina School of physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai univ.rsity TianjinChina Wuhan univ.rsity WuhanChina Xi'an Jiaotong univ.rsity Xi'anChina Xiamen univ.rsity XiamenChina School of physics and Microelectronics Zhengzhou UniversityZhengzhouChina Institute of physics National

This paper presents an energy resolution study of the JUNO experiment,incorporating the latest knowledge acquired during the detector construction *** determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 *** achieve this ambitious goal,significant efforts have been undertaken in the design and production of the key components of the JUNO *** factors affecting the detection of inverse beta decay signals have an impact on the energy resolution,extending beyond the statistical fluctuations of the detected number of photons,such as the properties of the liquid scintillator,performance of photomultiplier tubes,and the energy reconstruction *** account for these effects,a full JUNO simulation and reconstruction approach is *** enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy *** results of this study reveal an energy resolution of 2.95% at 1 ***,this study assesses the contribution of major effects to the overall energy resolution *** analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data ***,it provides a guideline for comprehending the energy resolution characteristics of liquid scintillator-based detectors.

关键词： energy resolution liquid scintillator detector JUNO simulation reconstruction

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Dimuon production from Heavy Quark Decay in Heavy-Ion Collisions at √s-5.5 TeV

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Chinese physics Letters 1999年第7期16卷 496-498页

作者： ZHOU Dai-cui Denis JOUAN LIU Han CAI Xu Institute of particle physics Huazhong Normal UniversityWuhan 430079 Institut de physique Nucleairej univ.rsite paris-Sud et in2p3-cnrs 91406 OrsayFrance

The production of heavy-Havor quark c(c)and b(b)in pp collisions is described under perturbative quantum chromodynamics framework,the extrapolation from hadron-hadron up to nucleus-nucleus collisions is based on geometrical model by taking into account the nucleus shadowing *** simulate the heavy quark production,the decay to dilepton and effects of detection and analysis technique of the pairs,and predict the muon rate and the invariant mass spectrum of dimuons that could be detected in forward region in pb-pb collisions at large hadron collider energies.

关键词： effect. quark hadron

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Time-like proton form factor measurement with ANDA

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Chinese physics C 2009年第12期33卷 1244-1248页

作者： M. Sudol Institut de physique Nuclaire CNRS/IN2P3 Universit Paris Sud Orsay France

The electromagnetic probe is an excellent tool to investigate the structure of the nucleon. The nearly 4π detector pANDA, will allow to make a precise determination of the electromagnetic form factors of the proton in the time-like region with unprecedented precision. In the one-photon exchange approximation, the center of mass unpolarized differential cross section of the reaction pp → e＋e- is a linear combination of the squared moduli of the electric GE and magnetic GM proton form factors. The precise measurement of the angular distribution over almost full angular range then directly gives these quantities. At present only two experiments have provided the ratio R=｜ GE｜/｜GM｜ but with large statistical uncertainties. It is shown that with strict pID cuts and a kinematic fit, the dominant background, pp→π＋π-, can be supressed to much less than 1% of the signal, without affecting the extraction of the ratio R. pANDA will therefore offer a unique opportunity to measure the ratio with a precision ranging from 〈1% at low q2 up to 30 % for q2 = 14 （GeV/c）2.

关键词： electromagnetic form factors nuclear structure FAIR pANDA

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New results on the hadronic vacuum polarization contribution to the muon g-2

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Chinese physics C 2010年第6期34卷 718-727页

作者： Michel Davier Laboratoire de l'Acclrateur Linaire IN2P3/CNRSUniversit Paris-Sud 11

Results on the lowest-order hadronic vacuum polarization contribution to the muon magnetic anomaly are presented. They are based on the latest published experimental data used as input to the dispersion integral. Thus recent results on τ→υτππ^0 decays from Belle and on e^＋e^- annihilation to π^＋π^- from BABAR and KLOE are included. The new data, together with improved isospin-breaking corrections for τ decays, result into a much better consistency among the different results. A discrepancy between the Standard Model prediction and the direct g- 2 measurement is found at the level of 3σ.

关键词： muon magnetic moment vacuum polarization electron-positron annihilation tau decays g-2

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