Front-end electronics for the ALICE calorimeters
作者：
Wang, Yaping
* ;Ma, Ke;Muller, Hans;Cai, Xu;Zhou, Daicui
（ ;...
期刊：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT ,2010年617(1-3):369-371 ISSN：0168-9002
通讯作者：
Wang, Yaping
作者机构：
[Zhou, Daicui; Wang, Dong; Wang, Yaping; Yin, Zhongbao; Cai, Xu] Huazhong Normal Univ, Minist Educ, CCNU, Key Lab Quark & Lepton Phys, Wuhan 43079, Peoples R China.;[Zhou, Daicui; Ma, Ke; Wang, Dong; Wang, Yaping; Yin, Zhongbao; Cai, Xu] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Ma, Ke] Huazhong Univ Sci & Technol, Wuhan 430079, Peoples R China.;[Muller, Hans] CERN, PH AID DT, CH-1211 Geneva 23, Switzerland.;[Awes, Terry C.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
通讯机构：
[Wang, Yaping] H;Huazhong Normal Univ, Minist Educ, CCNU, Key Lab Quark & Lepton Phys, Wuhan 43079, Peoples R China.
会议名称：
11th Pisa Meeting on Advanced Detectors
会议时间：
MAY 24-30, 2009
会议地点：
Isola Elba, ITALY
会议主办单位：
[Wang, Yaping;Cai, Xu;Zhou, Daicui;Yin, Zhongbao;Wang, Dong] Huazhong Normal Univ, Minist Educ, CCNU, Key Lab Quark & Lepton Phys, Wuhan 43079, Peoples R China.^[Wang, Yaping;Ma, Ke;Cai, Xu;Zhou, Daicui;Yin, Zhongbao;Wang, Dong] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.^[Ma, Ke] Huazhong Univ Sci & Technol, Wuhan 430079, Peoples R China.^[Muller, Hans] CERN, PH AID DT, CH-1211 Geneva 23, Switzerland.^[Awes, Terry C.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
关键词：
ALICE calorimeters;APD;CSP;Front-end electronics (FEE);Shaper;ALTRO;Fast OR;Noise
摘要：
The ALICE calorimeters PHOS and EMCal are based on Avalanche Photo-Diode (APD) photosensors with Charge Sensitive Preamplifiers (CSP) for readout of the scintillating elements. The amplified signals are read out via 32-channel shaper/digitizer front-end electronics (FEE) with 14-bit effective dynamic range. The electronics is based on second order shapers with dual gain for each channel, getting digitized by ALTRO chips. Each APD channel is equipped with an individual 10-bit APD gain adjustment and 2×2 channel clusters generate a 100 ns shaped analog sums output (Fast OR) for the associated Trigger Region Units (TRU). The Fast OR signals are generated by first order shapers with a dynamic range of 12-bit given by the ADC in the TRU cards. Board controller firmware in the FPGA provides local monitoring and configuration of all parameters via the ALICE DCS system. The signal to noise ratio for MIP at 215 MeV is ∼7 per channel with a noise level of 30 MeV at room temperature for a dynamic range of 80 GeV for PHOS, and the fast-OR RMS noise level is about 75 MeV for a dynamic range of 250 GeV for EMCal.
语种：
英文
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Numerical Simulation of Azimuthal Anisotropy of Direct Photons in High Energy Nucleus-nucleus Collisions
期刊：
原子核物理评论 ,2010年27(4):426-431 ISSN：1007-4627
作者机构：
[马科; 朱光喜] Department of Electronics and Information Engineering,Huazhong University of Science and Technology;[周代翠] Institue of Particle Physics,Central China Normal University
关键词：
直接光子;高能核-核碰撞;喷注淬火;各向异性
摘要：
通过计算给出了在LHC能区非对心核-核碰撞中由椭圆流ν2表示的高横动量直接光子的方位角不对称性。该高横动量光子是由喷注与热密介质相互作用而辐射出来的。光子椭圆流与强子椭圆流ν2相差π/2的相位,是直接光子椭圆流中负值的来源。同时,计算表明LHC能区直接光子ν2随粒子横动量pT的变化趋势与RHIC上的实验结果一致,但LHC能区较RHIC能区有更低的直接光子流ν2值,且ν2值由负到正对应的转换pT值更高。这表明在LHC能区喷注淬火效应更为明显,表面发射的直接光子对光子椭圆流的贡献份额增强。
语种：
中文
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Front-end electronics of the ALICE photon spectrometer
作者：
Yin, Zhongbao* ;Muller, Hans;Pimenta, Rui;Rohrich, Dieter;Sibiriak, Iouri;...
期刊：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT ,2010年623(1):472-474 ISSN：0168-9002
通讯作者：
Yin, Zhongbao
作者机构：
[Zhou, Daicui; Wang, Dong; Wang, Yaping; Yin, Zhongbao] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Zhou, Daicui; Wang, Dong; Wang, Yaping; Yin, Zhongbao] Huazhong Normal Univ, Minist Educ, Key Lab Quark & Lepton Phys, Wuhan 430079, Peoples R China.;[Muller, Hans; Pimenta, Rui] CERN, PH Dept, CH-1211 Geneva 23, Switzerland.;[Rohrich, Dieter] Univ Bergen, Dept Phys & Technol, N-5020 Bergen, Norway.;[Sibiriak, Iouri] Kurchatov Inst, Russian Res Ctr, Moscow, Russia.
通讯机构：
[Yin, Zhongbao] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
会议名称：
1st International Conference on Technology and Instrumentation in Particle Physics (TIPP 09)
会议时间：
MAR 12-17, 2009
会议地点：
Tsukuba, JAPAN
会议主办单位：
[Yin, Zhongbao;Wang, Dong;Wang, Yaping;Zhou, Daicui] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.^[Yin, Zhongbao;Wang, Dong;Wang, Yaping;Zhou, Daicui] Huazhong Normal Univ, Minist Educ, Key Lab Quark & Lepton Phys, Wuhan 430079, Peoples R China.^[Muller, Hans;Pimenta, Rui] CERN, PH Dept, CH-1211 Geneva 23, Switzerland.^[Rohrich, Dieter] Univ Bergen, Dept Phys & Technol, N-5020 Bergen, Norway.^[Sibiriak, Iouri] Kurchatov Inst, Russian Res Ctr, Moscow, Russia.^[Skaali, Bernhard] Univ Oslo, Dept Phys, N-0316 Oslo, Norway.
关键词：
Dynamic range;Energy resolution;Front-end electronics;Photon spectrometer;Timing resolution
摘要：
The photon spectrometer (PHOS) in the ALICE experiment at LHC is dedicated to measuring photons, π0's and η's in a broad p<inf>T</inf> range from about 100 MeV/c to 100 GeV/c, providing the best possible energy and position resolution in order to narrow the π0 and ηmass peaks and thus to increase the signal to background ratio. The front-end electronics (FEE) of the PHOS is thus required to cover a large dynamic range, to have a timing resolution better than ∼2ns in order to discriminate against 12 GeV/c (anti-)neutrons, and to provide high p<inf>T</inf> trigger to select rare high p<inf>T</inf> events. In addition, to equalize the gains of individual detector channels, it is desired that the PHOS FEE can regulate the bias voltage of APD. In this paper, we will present the performance and status of the 32-channel low noise front-end electronics for the PHOS with a dynamic range of 14 bits. Measurements with LED pulse at laboratory and results from beam test with the first PHOS module at T10 of the CERN PS show that its performance fulfills the PHOS requirements. ©2010 Elsevier B.V. All rights reserved.
语种：
英文
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Potential physics measurement with ALICE electromagnetic calorimeters
作者：
Zhou, D. C.
* （ ;Mao, Y. X.;Wan, R. Z.;Schutz, Y.;Yin, Z-B.;...
期刊：
Nuclear Physics A ,2010年834(1-4):291C-294C ISSN：0375-9474
作者机构：
[Zhou, D. C.; Mao, Y. X.; Yin, Z-B.; Wang, Y. P.; Wang, M. L.; Zhu, X. R.; Wan, R. Z.; Yin, X.; Cai, X.; Ma, K.] Huazhong Normal Univ, Inst Particle Phys, Minist Educ, Key Lab Quark & Lepton Phys, Wuhan, Peoples R China.;[Schutz, Y.] CERN, CH-1211 Geneva, Switzerland.;[Schutz, Y.] IN2P3, SUBATECH, Nantes, France.;[Conesa, G.] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.;[Kharlov, Y.] Inst High Energy Phys, Protvino 142281, Russia.
通讯机构：
[Zhou, D. C.] H;Huazhong Normal Univ, Inst Particle Phys, Minist Educ, Key Lab Quark & Lepton Phys, Wuhan, Peoples R China.
会议名称：
10th International Conference on Nucleus-Nucleus Collisions (NN2009)
会议时间：
AUG 16-21, 2009
会议地点：
Beijing, PEOPLES R CHINA
会议主办单位：
[Zhou, D. C.;Mao, Y. X.;Wan, R. Z.;Yin, Z-B.;Wang, Y. P.;Ma, K.;Wang, M. L.;Zhu, X. R.;Yin, X.;Cai, X.] Huazhong Normal Univ, Inst Particle Phys, Minist Educ, Key Lab Quark & Lepton Phys, Wuhan, Peoples R China.^[Schutz, Y.] CERN, CH-1211 Geneva, Switzerland.^[Schutz, Y.] IN2P3, SUBATECH, Nantes, France.^[Conesa, G.] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.^[Kharlov, Y.] Inst High Energy Phys, Protvino 142281, Russia.
摘要：
We present the two electromagnetic calorimeters of the ALICE (A Large Ion Collider Experiment) experiment at LHC (Large Hadron Collider). One is the high-resolution PHOton Spectrometer (PHOS) made of lead tungsten crystals and the other is the ElectroMagnetic Calorimeter (EMCal), a Lead-Scintillator sampling calorimeter. They are dedicated to the measurement and identification of direct photons, light neutral mesons such as π0, η and ω (782), and jets emitted in proton-proton and heavy-ion collisions at the LHC energies. The PHOS is capable of precisely detecting photons with momentum range between 0.1 GeV/c and 100 GeV/c and the EMCal can extend the prompt photon and light neutral meson momentum measurement beyond 200 GeV/c. The objective of the study is to explore the physics of strongly interacting QCD matter under extreme conditions of energy density. © 2010 Elsevier B.V. All rights reserved.
语种：
英文
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Hadron Multiplicities in Pb+Pb Collisions at the Large Hadron Collider and Pomeron Loop Effects
作者：
Xiang Wen-Chang
* ;Wang Sheng-Qin;Zhou Dai-Cui
（ 期刊：
中国物理快报：英文版 ,2010年27(7): 072502-1-072502-4 ISSN：0256-307X
通讯作者：
Xiang Wen-Chang
作者机构：
[Zhou Dai-Cui; Xiang Wen-Chang] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Wang Sheng-Qin] Hunan Inst Technol, Basic Course Teaching Dept, Phys Teaching Res Grp, Hengyang 421002, Peoples R China.;[Xiang Wen-Chang] Univ S Dakota, Dept Phys, Vermillion, SD 57069 USA.
通讯机构：
[Xiang Wen-Chang] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
关键词：
Centralization;Colour;Lead
摘要：
We study the pseudo-rapidity distribution of hadron multiplicities of high energy Pb+Pb collisions by using color glass condensate dynamics at LHC/ALICE in the fixed coupling case. It is found that after including the pomeron loop effects the charged hadron multiplicities at central rapidity are about 1500 for central Pb+Pb collisions, which are significantly smaller than the saturation based calculations, ∼ 1700 ÷ 2500 and compatible with that based on a study of multiplicities in the fragmentation region. © 2010 Chinese Physical Society and IOP Publishing Ltd.
语种：
英文
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High pt and photon physics with ALICE at LHC
作者：
Zhou Dai-Cui
* （ ;Wan Ren-Zhuo;Mao Ya-Xian;Schutz, Y.;Wang Meng-Liang;...
期刊：
中国物理C ,2010年34(9):1383-1386 ISSN：1674-1137
作者机构：
[Zhou Dai-Cui; Wan Ren-Zhuo; Yin Zhong-Bao; Wang Meng-Liang; Cai Xu; Mao Ya-Xian; Wang Ya-Ping; Ma Ke] Huazhong Normal Univ, Inst Particle Phys, Key Lab Quaik & Lepton Phys, Minist Educ, Wuhan 430079, Peoples R China.;[Wan Ren-Zhuo; Roy, C.] Univ Strasbourg, Inst Pluridisciplinaire Hubert Curien, CNRS, IN2P3, F-67037 Strasbourg, France.;[Conesa, G.; Mao Ya-Xian] CNRS, IN2P3, Lab Phys Subatom & Cosmol, F-38026 Grenoble, France.;[Schutz, Y.] CERN, CH-1211 Geneva, Switzerland.;[Kharlov, Y.] Inst High Energy Phys, Protvino 142281, Russia.
通讯机构：
[Zhou Dai-Cui] H;Huazhong Normal Univ, Inst Particle Phys, Key Lab Quaik & Lepton Phys, Minist Educ, Wuhan 430079, Peoples R China.
会议名称：
The 5th International Conference on Quarks and Nuclear Physics(第五届夸克核物理国际会议 QNP09)
会议时间：
2009-09-21
会议地点：
北京
会议主办单位：
Inst High Energy Phys Chinese Acad Sci
会议论文集名称：
The 5th International Conference on Quarks and Nuclear Physics(第五届夸克核物理国际会议 QNP09)论文集
关键词：
ALICE experiment;PHOS;EMCAL;Jet quenching;y-jet measurement
摘要：
ALICE, A Large Ion Collider Experiment, is dedicated to study the QCD matter at extreme high temperature and density to understand the Quark Gluon Plasma (QGP) and phase transition. High-transversemomentum photons and neutral mesons from the initial hard scattering of partons can be measured with ALICE calorimeters, PHOS (PHOton Spectrometer) and EMCAL (ElectroMagnetic CALorimeter). Combing the additional central tracking detectors, the γy-jet and π°-jet measurements thus can be accessed. These measurements offer us a sensitive tomography probe of the hot-dense medium generated in the heavy ion collisions. In this paper, high pT and photon physics is discussed and the ALICE calorimeters capabilities of high-transverse- momentum neutral mesons and γ-jet measurements are presented. © 2010 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.
语种：
英文
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Measurement of (di)muons from heavy flavour decay in p-p collisions at 14 TeV with ALICE at the LHC
作者：
Zhang Xiao-Ming* ;Manceau, L.;Bastid, N.;Crochet, P.;Grigoryan, S.;...
期刊：
中国物理C ,2010年34(9):1538-1540 ISSN：1674-1137
通讯作者：
Zhang Xiao-Ming
作者机构：
[Zhou Dai-Cui; Zhang Xiao-Ming] Cent China Normal Univ, Inst Particle Phys, Wuhan, Peoples R China.;[Grigoryan, S.; Bastid, N.; Manceau, L.; Crochet, P.; Zhang Xiao-Ming] Univ Blaise Pascal, Clermont Univ, CNRS, LPC,IN2P3, F-63000 Clermont Ferrand, France.;[Grigoryan, S.] Yerevan Phys Inst, Yerevan 375036, Armenia.;[Grigoryan, S.] Joint Inst Nucl Res, Dubna, Russia.
通讯机构：
[Zhang Xiao-Ming] C;Cent China Normal Univ, Inst Particle Phys, Wuhan, Peoples R China.
会议名称：
The 5th International Conference on Quarks and Nuclear Physics(第五届夸克核物理国际会议 QNP09)
会议时间：
2009-09-21
会议地点：
北京
会议主办单位：
Inst High Energy Phys Chinese Acad Sci
会议论文集名称：
The 5th International Conference on Quarks and Nuclear Physics(第五届夸克核物理国际会议 QNP09)论文集
关键词：
ALICE muon spectrometer;heavy flavour;pQCD
摘要：
We present the performance of the ALICE muon spectrometer for measuring the charm and beauty inclusive p t differential production cross sections via single muons and unlike-sign dimuons in proton-proton collisions at√ s = 14 TeV.
语种：
英文
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QGP tomography with photon tagged jets in ALICE
作者：
Mao Ya-Xian
* ;Schutz, Yves;Zhou Dai-Cui
（ ;Furget, Christophe;Balbastre, Gustavo Conesa
期刊：
中国物理C ,2010年34(9):1491-1493 ISSN：1674-1137
通讯作者：
Mao Ya-Xian
作者机构：
[Zhou Dai-Cui; Mao Ya-Xian] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Schutz, Yves] CERN, CH-1211 Geneva 23, Switzerland.;[Mao Ya-Xian; Furget, Christophe] IN2P3, CNRS, Lab Phys Subatom & Cosmol, F-38026 Grenoble, France.;[Balbastre, Gustavo Conesa] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
通讯机构：
[Mao Ya-Xian] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
会议名称：
The 5th International Conference on Quarks and Nuclear Physics(第五届夸克核物理国际会议 QNP09)
会议时间：
2009-09-21
会议地点：
北京
会议主办单位：
Inst High Energy Phys Chinese Acad Sci
会议论文集名称：
The 5th International Conference on Quarks and Nuclear Physics(第五届夸克核物理国际会议 QNP09)论文集
关键词：
direct photon;QGP;jet structure;tomography;path length
摘要：
γ+Jet events provide a, tomographic measurement of the medium formed in heavy ion collisions at LHC energies. Tagging events with a well identified high PT direct photon and measuring the correlation distribution of hadrons emitted oppositely to the photon in ALICE, allows us to determine, with a good approximation, both the jet fragmentation function and the back-to-back azimuthal alignment of the direct photon and the jet. Comparing these two observables measured in pp collisions with the ones measured in AA collisions will reveal the modifications of the jet structure induced by the medium formed in AA collisions and consequently will infer the medium properties. © 2010 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.
语种：
英文
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TeV能区重核作用中的光子-强子和强子-强子关联及密度物质效应研究
项目作者单位：
华中师范大学
项目批准号：
10875051
资助经费：
45万
立项时间：
2009-01-01到2011-12-31
项目类别：
面上项目
项目来源：
国家自科基金项目
项目关键词：
实验模拟、TeV重离子碰撞实验、光子-强子和强子强子关联测量、碎裂函数、密度物质响应及性质。
项目摘要：
本项目从实验上研究了LHC能区(7和14TeV)质子-质子(p-p)和(2.76和5.5 TeV)铅-铅(Pb-Pb)碰撞中的光子和中性介子产生，重味衰变轻子谱和重味衰变强子谱的产生以探测器响应，研究了光子、中性粒子和带电粒子的鉴别和重建方法及重建效率。建立了测量光子-强子和强子-强子关联，部分子内禀横动量k_T和部分子碎裂函数及其修正的分析方法；开展了夸克物质层析研究。建立了muon和强子道测量粲、底强子截面、muon谱压低和muon椭圆流分析方法。分析了ALICE首批 p-p和Pb-Pb实验数据，研究并给出了光子-强子和强子-强子关联以及部分子碎裂函数x_E分布的初步结果，提取了部分子内禀横动量k_T。分析并给出了muon产物横动量分布和粲、底强子截面，观测到重味-muon谱明显压低，计算了压低因子RCP和RAA。开展了muon产物椭圆流的初步分析。研究了ALICE寻迹系统内的径迹重建参量DCS的分辨率。在D0谱测量中做出了有贡献。合作建造ALICE光子谱仪及其读出电子学系统以及固件系统，建议建造双喷注量能器建议被采纳并开始建造双喷注量能器的一个超级模块。
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ALICE实验电磁量能器的前端电子学与层级触发
作者：
王亚平;蔡勖;周代翠
（ ;殷中宝;王东
作者机构：
[周代翠; 王亚平; 蔡勖; 殷中宝; 王东] 夸克与轻子物理教育部重点实验室(华中师范大学);[周代翠; 王亚平; 蔡勖; 殷中宝; 王东] 华中师范大学粒子物理研究所
会议名称：
中国核学会2009年学术年会
会议时间：
2009-11-18
会议地点：
北京
会议论文集名称：
中国核学会2009年学术年会论文集
关键词：
量能器;前端电子学;整形器;快求和;触发体系结构;FPGA算法;噪音
摘要：
ALICE实验电磁量能器(PHOS与EMCal)利用雪崩光电二极管(APD)作为光电转换器件,然后经过电荷灵敏前置放大器(CSP)进行电荷-电压信号转换与放大,这些被放大的信号然后送至前端电子学(FEE)板进行整形、模数转换及信号处理。FEE板可同时处理32通道的信号,并达到14比特位的有效测量动态范围,通过该FEE板可以实现的光子能量测量范围为0.005 GeV～80 GeV(PHOS)和0.0
语种：
中文
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Analytic expression for the proton structure function in deep inelastic scattering
作者：
Xiang Wen-Chang
* ;Zhou Dai-Cui
（ ;Wan Ren-Zhuo;Yuan Xian-Bao
期刊：
中国物理C ,2009年33(2):98-102 ISSN：1674-1137
通讯作者：
Xiang Wen-Chang
作者机构：
[Xiang Wen-Chang] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Huazhong Normal Univ, Key Lab Quark & Lepton Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Xiang Wen-Chang] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
关键词：
deep inelastic scattering;color glass condensate;proton structure function
摘要：
The analytic expression of proton in deep inelastic scattering is studied by using the color glass condensate model and the dipole picture. We get a better description of the HERA DIS data than the GBW model which was inspired by the Glauber model. We find that our model satisfies the unitarity limit and Proissart Bound which refers to an energy dependence of the total cross-section rising no more rapidly than ln2s. © 2009 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.
语种：
英文
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Heavy-quark energy loss observed via muon spectra in Pb-Pb collisions at root s(NN)=5.5 TeV
作者：
Zhou, D. C.
* （ ;del Valle, Z. Conesa;Dainese, A.;Ding, H-T;Garcia, G. Martinez
期刊：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS ,2009年36(6):064055- ISSN：0954-3899
作者机构：
[Zhou, D. C.; Ding, H-T] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;[Zhou, D. C.; Ding, H-T] Huazhong Normal Univ, Chinese Minist Educ, Key Lab Quark & Lepton Phys, Wuhan 430079, Peoples R China.;[del Valle, Z. Conesa] Ecole Polytech, CNRS, LLR, IN2P3, F-91128 Palaiseau, France.;[Dainese, A.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Padua, Italy.;[Garcia, G. Martinez] Univ Nantes, Ecole Mines, CNRS, Subatech IN2P3, Nantes, France.
通讯机构：
[Zhou, D. C.] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
会议名称：
12th International Conference on Strangeness in Quark Matter
会议时间：
OCT 05-10, 2008
会议地点：
Tsinghua Univ, Beijing, PEOPLES R CHINA
会议主办单位：
[Zhou, D. C.;Ding, H-T] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.^[Zhou, D. C.;Ding, H-T] Huazhong Normal Univ, Chinese Minist Educ, Key Lab Quark & Lepton Phys, Wuhan 430079, Peoples R China.^[del Valle, Z. Conesa] Ecole Polytech, CNRS, LLR, IN2P3, F-91128 Palaiseau, France.^[Dainese, A.] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Padua, Italy.^[Garcia, G. Martinez] Univ Nantes, Ecole Mines, CNRS, Subatech IN2P3, Nantes, France.
摘要：
Based on Conesa del Valle et al (2008 Phys. Lett. B 663 202), we present the results for the nuclear modification factors RAA and R CP of the high transverse momentum (5 < pt < 60 GeV/c) distribution of muons in Pb-Pb collisions at LHC energies, in which two pseudo-rapidity ranges covered by the LHC experiments, |η| < 2.5 and 2.5 < η < 4, are investigated. Heavy-quark energy loss is taken into account by mass-dependent BDMPS quenching weights. Muons from semi-leptonic decays of heavy quarks (c and b) and from leptonic decays of weak gauge bosons (W and Z) are the main contributions to the muon pt distribution above a few GeV/c. The muons from W and Z, that dominates the high p t, can be used as a medium-blind reference to observe the medium-induced suppression of beauty quarks. © 2009 IOP Publishing Ltd.
语种：
英文
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前端电子学系统板的故障定位研究
期刊：
核电子学与探测技术 ,2009年29(4): 760-763,791 ISSN：0258-0934
作者机构：
[周代翠; 黄光明; 王东; 张凡] 华中师范大学物理科学与技术学院,夸克与轻子物理教育部重点实验室(华中师范大学),湖北,武汉,430079
关键词：
前端电子学系统;故障定位;配置机制
摘要：
因为最新研发的250块ALICE/PHOS前端电子学FEE系统板的部分器件在无铅焊接中被部分或完全损坏.为了不影响FEE系统性能,准确定位FFE系统板上与FPGA相关的故障,在对ACEX系列FPGA的配置机制进行深入研究的基础上找到了一种定位FEE系统板故障点的方法.文章着重研究了多器件的JTAG配置、基于EPC系列配置器件的PS配置和FPGA的自动重配置等问题.FEE系统板的大量测试和维修结果证明,该定位方法能准确、快速地定位FEE系统板上与FPGA器件相关的故障点.
语种：
中文
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基于FPGA的光电倍增管APD偏压控制电路设计
期刊：
核电子学与探测技术 ,2008年28(6):1219-1222 ISSN：0258-0934
通讯作者：
Wang, D.
作者机构：
[周代翠; 黄光明; 王东; 张凡] 华中师范大学物理科学与技术学院
通讯机构：
College of Physical Science and Technology, Huazhong Normal University, China
关键词：
偏压控制;反馈校验
摘要：
为了减小光子谱仪PHOS中信号通道增益的离散性,需要调整光电倍增管APD的偏压来补偿系统中的以下几个方面:APD增益的宽离散性、前置放大器增益的离散性和钨酸铅晶体光产额的离散性等。因此,设计了基于FPGA的APD偏压控制电路。该控制电路通过FPGA对10-bit DAC进行控制,使输出高压的调节范围达到210V～400V,调节精度达到0.2V/bit。文中具体介绍了APD偏压控制电路的设计思路,给出了测试结果,并对测试结果进行了深入的分析。
语种：
中文
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γ-hadron correlation measurements to study jets fragmentation with ALICE at LHC
作者：
Mao, Yaxian
* ;Balbastre, Gustavo Conesa;Sano, Masato;Schutz, Yves;Zhou, Daicui
（ 期刊：
EUROPEAN PHYSICAL JOURNAL C ,2008年57(3):613-619 ISSN：1434-6044
通讯作者：
Mao, Yaxian
作者机构：
[Zhou, Daicui; Mao, Yaxian] Cent China Normal Univ, Inst Particle Phys, Wuhan, Peoples R China.;[Balbastre, Gustavo Conesa] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.;[Sano, Masato] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki, Japan.;[Schutz, Yves] IN2P3, Nantes, France.;[Schutz, Yves] CERN, Geneva, Switzerland.
通讯机构：
[Mao, Yaxian] C;Cent China Normal Univ, Inst Particle Phys, Wuhan, Peoples R China.
关键词：
Large Hadron Collider;Fragmentation Function;Charged Hadron;Decay Photon;Prompt Photon
摘要：
The possibility to study the fragmentation function of jets with energies below 50 GeV, which cannot be reconstructed in the heavy-ion environment, is explored. We propose to measure the imbalance distribution between prompt photon and charged hadrons with the ALICE experiment at LHC. In the present article, the case of proton-proton collisions at √s = 14 TeV is examined with Monte-Carlo simulations. Performances for prompt photon identification and rejection of the π 0 decay photons are presented. We find that the measurement in proton-proton is meaningful with respect to statistical and systematic errors for photon energies larger than 20 GeV. © 2008 Springer-Verlag / Società Italiana di Fisica.
语种：
英文
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大型强子对撞机上的大型重离子碰撞实验
期刊：
现代物理知识 ,2008年20(5):39-44 ISSN：1001-0610
作者机构：
湖北省武汉市华中师范大学粒子物理研究所,430079;[周代翠; 殷中宝] 华中师范大学
关键词：
重离子碰撞实验;大型强子对撞机;物质微观结构;物质世界;组成部分;物质形态;物理学;人类
摘要：
探索物质微观结构和新的物质形态始终是人类认识物质世界的基本规律的一个重要组成部分.随着物理学的发展,人类对物质的微观结构的认识逐步深入,先后认识到:物质世界是由原子组成的,是原子或由原子结合在一起形成的分子组成世界万物;原子又是由原子核和核外电子组成的.
语种：
中文
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LHC／ALICE及其光子探测
作者：
周代翠
（ ;万仁卓;毛亚显;殷中宝;徐春成;...
期刊：
原子能科学技术 ,2008年42(7):655-657 ISSN：1000-6931
通讯作者：
Zhou, D.-C.
作者机构：
[周代翠; 余南山; Cai, Xu; 殷中宝; 蔡勖; 万仁卓; 毛亚显] Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China;[周代翠; 余南山; Cai, Xu; 殷中宝; 蔡勖; 万仁卓; 毛亚显] Key Laboratory of Quark and Lepton Physics, Huazhong Normal University, Wuhan 430079, China
通讯机构：
Institute of Particle Physics, Huazhong Normal University, China
关键词：
高能重离子碰撞;夸克-胶子等离子体物质;大型离子对撞机实验;光子谱仪;光子探测
摘要：
大型强子对撞机（LHC）上的大型离子对撞机实验（ALICE）将致力于TeV能区重离子碰撞，探测夸克退禁闭的新物质形态——夸克-胶子等离子体（QGP），探索宇宙诞生之初的物态性质。本文介绍其上的新一代电磁谱仪ALICE光子探测器（PHOS），它将用于铅-铅碰撞实验中测量直接光子和衰变光子产物，诊断夸克物质的电磁信号。束流测试结果显示，ALICE光子谱仪——PHOS将能够高效探测0．5～100GeV／c的光子。
语种：
中文
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Track matching study from TPC to PHOS in ALICE
作者：
Wan Ren-Zhuo
* ;Xu Chun-Cheng;Zhou Dai-Cui
（ ;Yin Zhong-Bao
期刊：
中国物理C ,2008年32(8):620-623 ISSN：1674-1137
通讯作者：
Wan Ren-Zhuo
作者机构：
[Zhou Dai-Cui; Wan Ren-Zhuo; Yin Zhong-Bao; Xu Chun-Cheng] Huazhong Normal Univ, Minist Educ, Key Lab Quak & Lepton Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Wan Ren-Zhuo] H;Huazhong Normal Univ, Minist Educ, Key Lab Quak & Lepton Phys, Wuhan 430079, Peoples R China.
关键词：
ALICE experimental simulation;photon detection;track reconstruction;track matching efficiency
摘要：
We present a study for matching charged tracks reconstructed from the ALICE tracking detectors with the clusters measured in the photon spectrometer. Matching efficiency and contaminations due to wrong matches have been deduced for charged pions and muons. For electrons, the effect of the material in front of PHOS is discussed.
语种：
英文
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Study of the photon identification efficiency with ALICE photon spectrometer
作者：
Mao Ya-Xian
* ;Zhou Dai-Cui
（ ;Xu Chun-Cheng;Yin Zhong-Bao
期刊：
中国物理C ,2008年32(7):543-547 ISSN：1674-1137
通讯作者：
Mao Ya-Xian
作者机构：
[Zhou Dai-Cui; Yin Zhong-Bao; Xu Chun-Cheng; Mao Ya-Xian] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Mao Ya-Xian] C;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
关键词：
ALICE experimental simulation;photon detection;identification efficiency;detector edge effect and photon conversion
摘要：
The efficiency for the detection and identification of photons with the ALICE PHOton Spectrometer PHOS has been studied with the Monte-Carlo generated data. In particular, the influence on the efficiency of the PHOS-module edge-effect and of the material in front of PHOS have been examined.
语种：
英文
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Surface Emission of Quark Gluon Plasma at RHIC and LHC
作者：
Xiang Wen-Chang
* ;Wan Ren-Zhuo;Zhou Dai-Cui
（ 期刊：
中国物理快报：英文版 ,2008年25(11):3912-3915 ISSN：0256-307X
通讯作者：
Xiang Wen-Chang
作者机构：
[Xiang Wen-Chang] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.;Huazhong Normal Univ, Minist Educ, Key Lab Quark & Lepton Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Xiang Wen-Chang] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
关键词：
Surface Emission;Quark Gluon Plasma;RHIC;LHC
摘要：
Within the framework of a factorization model, we study the behaviour of nuclear modification factor in Au-Au collisions at RHIC and Pb-Pb collisions at LHC. We find that the nuclear modification factor is inversely proportional to the radius of the quark-gluon plasma and is dominated by the surface emission of hard jets. We predict the nuclear modification factor PLHS AA ∼ 0.15 in central Pb-Pb collisions at LHC. The study shows that the factorization model can be used to describe the centrality dependence of nuclear modification factor of the high transverse momentum particles produced in heavy ion collisions at both RHIC and LHC. © 2008 Chinese Physical Society and IOP Publishing Ltd.
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英文
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