2011 Vol. 35, No. 1

Particle and field theory
Luminosity monitoring and calibration of BLM
XUE Zhen, XU Zi-Zong, WANG Xiao-Lian, HU Tao, WANG Zhi-Yong, FU Cheng-Dong, YAN Wen-Biao, ZHOU Li, CAI Xiao, YU Bo-Xiang, FANG Jian, SUN Xi-Lei, SHI Feng, WANG Zhi-Gang, AN Zheng-Hua, SUN Li-Jun, LIU Hong-Bang, ZHANG Ai-Wu, WANG Xiao-Dong
2011, 35(1): 1-5. doi: 10.1088/1674-1137/35/1/001
Abstract:
The BEPCⅡ Luminosity Monitor (BLM) monitors relative luminosity per bunch. The counting rates of gamma photons, which are proportional to the luminosities from the BLM at the center of mass system energy of the ψ(3770) resonance, are obtained with a ...
Are operators describing b→sγ?
DONG Fan-Long, WANG Wen-Yu, XIONG Zhao-Hua
2011, 35(1): 6-10. doi: 10.1088/1674-1137/35/1/002
Abstract:
The operators of b→sγ, b→sl+l- are usually regarded as being sufficient to describe b→sγγ, b→sl+l-γ with the statement that contributions from diagrams without an effective vertex b→sγ to processes b→sγγ and b→sl+l-γ are negligible. In this work we p...
Wigner function for the Dirac oscillator in spinor space
MA Kai, WANG Jian-Hua, YUAN Yi
2011, 35(1): 11-15. doi: 10.1088/1674-1137/35/1/003
Abstract:
The Wigner function for the Dirac oscillator in spinor space is studied in this paper. Firstly, since the Dirac equation is described as a matrix equation in phase space, it is necessary to define the Wigner function as a matrix function in spinor sp...
Λc* in a coupled-channel baryon-meson scattering
LIANG Wei-Hong, QIU Yu-Feng, HU Jian-Xiong, SHEN Peng-Nian
2011, 35(1): 16-21. doi: 10.1088/1674-1137/35/1/004
Abstract:
Possible structures and properties of some excited states of Λc+ dynamically generated in the coupled-channel P-wave meson-baryon scattering are studied by solving the Bethe-Salpeter(BS) equation in the framework of the Chiral Unitary Approach. It is...
particle and nuclear astrophysics and cosmology
Quantum tunnelling of higher-dimensional Kerr-anti-de Sitter black holes beyond semi-classical approximation
LIU Wei-Wei, LUO Zhi-Quan, YANG Juan, BIAN Gang
2011, 35(1): 22-25. doi: 10.1088/1674-1137/35/1/005
Abstract:
Based on the theory of Klein-Gordon scalar field particles, the Hawking radiation of a higher-dimensional Kerr-anti-de Sitter black hole with one rotational parameter is investigated using the beyond semi-classical approximation method. The correctio...
Nuclear and ion Physics
Effect of deuteron density distribution on the deduction of screening potential from the D(d,p)T reaction in Be metals
Lü Hui-Yi, WANG Tie-Shan, HAN Yun-Cheng, FANG Kai-Hong, MENG Xuan, HE Qing-Hua, GUAN Xing-Cai, LAN Ming-Cong
2011, 35(1): 26-30. doi: 10.1088/1674-1137/35/1/006
Abstract:
The D(d,p)T reaction in Be metal environments has been measured to investigate the electron screening effect in metals in an energy region of from 5.5 keV to 10 keV in a center of mass system (CMS) at a temperature of 121 K. The depth distribution of...
Analysis of the total activation cross section of all possible reactions producing the same radioactive nuclide for the same element
ZHOU Feng-Qun, SONG Yue-Li, TUO Fei, KONG Xiang-Zhong
2011, 35(1): 31-34. doi: 10.1088/1674-1137/35/1/007
Abstract:
Firstly, according to the regulation of growth and decay of radioactive nuclides produced in reactions, a formula used to calculate the total activation cross section of all possible reactions producing the same radioactive nuclide for the same eleme...
Theoretical analysis of double-differential neutron emission cross sections for n+56Fe reactions at incident energies of 7-13 MeV
HOU Pei-You, SUN Xiao-Jun, YU Cheng-Gang, LU Xiao
2011, 35(1): 35-39. doi: 10.1088/1674-1137/35/1/008
Abstract:
The double-differential neutron emission cross sections for n+56Fe reactions at incident energies of 7-13 MeV at different angles are calculated by the UNF (abbreviation for unified, 2009 Version) code, which is based on the unified Hauser-Feshbach a...
Various flows of black and grey particles produced in Mg-emulsion collisions at 4.5 A GeV c
GAO Yan, LIU Fu-Hu, Abd Allah
2011, 35(1): 40-43. doi: 10.1088/1674-1137/35/1/009
Abstract:
Various flow phenomena of black particles (b-particles) and grey particles (g-particles) produced in magnesium-emulsion (Mg-Em) collisions at 4.5 A GeV /c are reported. These flows are directed and elliptic transverse flows (v1 and v2) related by the...
Recursive method for opacity expansion at finite temperature
LIU Jia, KANG Zhong-Bo, WANG En-ke
2011, 35(1): 44-49. doi: 10.1088/1674-1137/35/1/010
Abstract:
Using a reaction operator approach, we derive the multiple-scattering induced gluon number distribution function to all orders in powers of opacity at finite temperature. The detailed balance effect is analyzed by taking into account both gluon emiss...
Detection Technology and Methods
Comparative studies of silicon photomultipliers and traditional vacuum photomultiplier tubes
SHI Feng, LU Hong, WANG Huan-Yu, MA Yu-Qian, HU Tao, ZHOU Li, CAI Xiao, SUN Li-Jun, YU Bo-Xiang, FANG Jian, XIE Yu-Guang, AN Zheng-Hua, WANG Zhi-Gang, GAO Min, LI Xin-Qiao, XU Yan-Bing, WANG Ping, SUN Xi-Lei, ZHANG Ai-Wu, XUE Zhen, LIU Hong-Bang, WANG Xiao-Dong, ZHAO Xiao-Yun, ZHENG Yang-Heng, MENG Xiang-Cheng, WANG Hui
2011, 35(1): 50-55. doi: 10.1088/1674-1137/35/1/011
Abstract:
Silicon photomultipliers (SiPMs) are a new generation of semiconductor-based photon counting devices with the merits of low weight, low power consumption and low voltage operation, promising to meet the needs of space particle physics experiments. In...
Drift field improvement and test in a GEM-TPC prototype
ZHENG Bao-Jun, LI Yu-Lan, DENG Zhi-Yong, LI Bo
2011, 35(1): 56-60. doi: 10.1088/1674-1137/35/1/012
Abstract:
With the help of Maxwell, Ansys and Garfield, a simulation of the electric field and the deviation of electron drift in the drift volume of a GEM-TPC prototype has been accomplished under the following conditions: Field Cages with one-side and double...
A TOF-PET prototype with position sensitive PMT readout
CHEN Jin-Da, XU Hu-Shan, HU Zheng-Guo, TANG Bin, YUE Ke, YU Yu-Hong, ZHANG Xue-Heng, KONG Jie, ZANG Yong-Dong, WANG Jian-Song, SUN Zhi-Yu, GUO Zhong-Yan
2011, 35(1): 61-66. doi: 10.1088/1674-1137/35/1/013
Abstract:
A prototype of time-of-flight positron emission computed tomography (TOF-PET) has been developed for acquiring the coincident detection of 511 keV γ-rays produced from positron annihilation. It consists of two 80.5 mm×80.5 mm LYSO scintillator arrays...
Design studies on the 4π γ-ray calorimeter for the ETF experiment at HIRFL-CSR
YUE Ke, XU Hu-Shan, SUN Zhi-Yu, SU Guang-Hui, WANG Jian-Song, ZHENG Chuan, LI Song-Lin, HU Zheng-Guo, CHEN Rou-Fu, XIAO Zhi-Gang, HU Qiang, ZHANG Xue-Ying, YU Yu-Hong, CHEN Jun-Ling
2011, 35(1): 67-71. doi: 10.1088/1674-1137/35/1/014
Abstract:
A high detection efficiency calorimeter which is used to detect γ-rays with energies from 1 MeV up to 10 MeV as well as light charged particles has been proposed. Design of the geometry, results of the crystal tests and Monte Carlo simulations are pr...
Time calibration for the end cap TOF system of BESⅢ
ZHAO Chuan, SUN Sheng-Sen, LI Cheng, ZHANG Xiao-Jie, HE Kang-Lin, AN Qi, CHEN Hong-Fang, DAI Hong-Liang, FENG Chang-Qing, HENG Yue-Kun, HUANG Ya-Qi, HUANG Yan-Ping, GUO Jian-Hua, LI Wei-Dong, LI Xiu-Rong, LIU Fang, LIU Huai-Min, LIU Shu-Bin, LIU Shu-Dong, LIU Yong, MA Xiang, MAO Ze-Pu, SHAO Ming, SUN Yong-Jie, SUN Zhi-Jia, WU Jin-Jie, YANG Gui-An, ZHAO Lei, ZHU Xing-Wang, ZUO Jia-Xu
2011, 35(1): 72-78. doi: 10.1088/1674-1137/35/1/015
Abstract:
The time calibration for end cap TOF system of BESⅢ is studied in this paper. It has achieved about 110 ps time resolution for muons in dimu events. The pulse height correction using electronic scan curve and the predicted time calculated using Kalma...
Accelerator
Design and experiments for the waveguide to coaxial cable adapter of a cavity beam position monitor
LI Xiang, ZHENG Shu-Xin
2011, 35(1): 79-82. doi: 10.1088/1674-1137/35/1/016
Abstract:
The waveguide to coaxial cable adapter is very important to the cavity beam position monitor (CBPM) because it determines how much of the energy in the cavity could be coupled outside. In this paper, the waveguide to coaxial cable adapter of a CBPM i...
Simulation of ion beam extraction and focusing system
B. A. Soliman, M. M. Abdelrahman, A. G. Helal, F. W. Abdelsalam
2011, 35(1): 83-87. doi: 10.1088/1674-1137/35/1/017
Abstract:
The characteristics of ion beam extraction and focused to a volume as small as possible were investigated with the aid of computer code SIMION 3D version 7. This has been used to evaluate the extraction characteristics (accel-decel system) to generat...
Design studies on a 500 kV DC gun photo-injector for the BXERL test facility
LIU Sheng-Guang, XU Jin-Qiang
2011, 35(1): 88-91. doi: 10.1088/1674-1137/35/1/018
Abstract:
BXERL is a proposal for a test facility (Beijing X-ray Energy Recovery Linac), which requires its injector to provide an electron beam of 5 MeV, 77 pC/ bunch at a repetition rate of 130 MHz (average current of 10 mA). In this paper, we present the de...
RF power coupling for the CSNS DTL
LIU Hua-Chang, PENG Jun, YIN Xue-Jun, OUYANG Hua-Fu, FU Shi-Nian
2011, 35(1): 92-95. doi: 10.1088/1674-1137/35/1/019
Abstract:
The China Spallation Neutron Source (CSNS) drift tube linac (DTL) consists of four tanks and each tank is fed by a 2.5 MW klystron. Accurate predication of RF coupling between the RF cavity and ports is very important for DTL RF coupler design. An ir...
Research on a novel compact linac
LUO Xiao-Wei, XIANG Xin-Lei, XIE Jia-Lin
2011, 35(1): 96-99. doi: 10.1088/1674-1137/35/1/020
Abstract:
This work looks at a new type of electron linear accelerator. Compared with the traditional electron linac, it has only two main parts: a klystron and an accelerating tube, without the electron gun element. This new kind of linac could perform just l...
Synchrotron radiation,applications of nuclear techniquees,etc
A compact positron annihilation lifetime spectrometer
LI Dao-Wu, LIU Jun-Hui, ZHANG Zhi-Ming, WANG Bao-Yi, ZHANG Tian-Bao, WEI Long
2011, 35(1): 100-103. doi: 10.1088/1674-1137/35/1/021
Abstract:
Using LYSO scintillator coupled on HAMAMATSU R9800 (a fast photomultiplier) to form the small size γ-ray detectors, a compact lifetime spectrometer has been built for the positron annihilation experiments. The system time resolution FWHM=193 ps and t...
Design and analysis of the tunnel connecting the beamcorridor and the spectrum hall of the CSNS
LIU Jian, WANG Qing-Bin, WU Qing-Biao, MA Zhong-Jian
2011, 35(1): 104-108. doi: 10.1088/1674-1137/35/1/022
Abstract:
There is a tunnel connecting the beamcorridor and the target station in the spectrum hall in the CSNS project. The length of the tunnel is about 20 m. The shielding design of the tunnel is very significant for the persons working in the spectrum hall...

ISSN 1674-1137 CN 11-5641/O4

Original research articles, Ietters and reviews Covering theory and experiments in the fieids of

  • Particle physics
  • Nuclear physics
  • Particle and nuclear astrophysics
  • Cosmology
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