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Study of the e^+e^- to hadrons via ISR at BABAR

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Chinese physics C 2010年第6期34卷 660-668页

作者： E.P.Solodov budker institute of nuclear physics

Experimental data from the PEP-II B-factory at 10.6 GeV center-of-mass （c.m.） energy, obtained via initial-state radiation （ISR） with the BABAR detector, are presented. The cross sections for many hadronic processes have been measured from the production threshold to 4-5 GeV of the e^＋e^- c.m. energy. The obtained data allow to study a number of intermediate states and determine the parameters of known resonances and their branching fractions. The exclusive cross section for some number of hadronic sub-processes are presented.

关键词： ISR e^+e^- hadrons BABAR

Measurements of the γγ＊ → π^0 and γγ＊ → ηc transition form factors at BABAR

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Chinese physics C 2010年第6期34卷 816-821页

作者： V.P.Druzhinin budker institute of nuclear physics

We present measurements of the γγ＊ → π^0 transition form factor for the momentum transfer range Q^2=4-40 GeV^2 and the γγ＊ → ηc transition form factor for the range Q^2=2-50 GeV^2. The current status of measurements of the meson-photon transition form factors for the η and η＇ mesons is discussed. The results of the measurement of the ηc mass, total and two-photon widths are also presented.

关键词： two-photon interaction pseudoscalar meson transition form factor pi0 eta eta(958) etac

Measurement of J/ψ leptonic width with the KEDR detector

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Chinese physics C 2010年第6期34卷 836-841页

作者： A.G.Shamov budker institute of nuclear physics

We report a new precise determination of the leptonic widths of the J/psi meson performed with the KEDR detector at the VEPP-4M e^＋e^- collider. The measured values of the J/psi parameters are： Гee×Гee/P = 0.3323±0.0064 （stat.）±0.0048 （syst.） keV,Гee×Гμμ/Г = 0.3318±0.0052 （stat.） ±0.0063 （syst.） keY. Assuming eμ universality and using the table value of the branching ratios the leptonic Г11 = 5.59 ± 0.12 keV width and the total Г = 94.1±2.7 keV widths were obtained. We also discuss in detail a method to calculate radiative corrections at a narrow resonance.

关键词： J/ψ meson lepton width full width

Monte Carlo generator photon jets used for luminosity at e^+e^- colliders

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Chinese physics C 2010年第6期34卷 877-882页

作者： G.V.Fedotovich E.A.Kuraev A.L.Sibidanov budker institute of nuclear physics Novosibirsk State University Joint institute of nuclear research

A Monte-Carlo Generator Photon Jets （MCGPJ） to simulate Bhabha scattering as well as production of two charged muons and two photons events is discussed. The theoretical precision of the cross sections with radiative corrections （RC） is estimated to be smaller than 0.2%. The Next Leading Order （NLO） radiative corrections proportional to α are treated exactly, whereas the all logarithmically enhanced contributions, related to photon jets emitted in the collinear region, are taken into account in frame of the Structure Function approach. Numerous tests of the MCGPJ as well as a detailed comparison with other MC generators are presented.

关键词： luminosity e^+e^- hadrons detectors

Electron cooling experiments in CSR

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Science China(physics,Mechanics & Astronomy) 2011年第S2期54卷 274-278页

作者： PARKHOMCHUK Vasily REVA Vladimir budker institute of nuclear physics

The six species heavy ion beam was accumulated with the help of electron cooling in the main ring of Cooler Storage Ring of Heavy Ion research Facility in Lanzhou (HIRFL-CSR). The ion beam accumulation dependence on the parameters of cooler was investigated experimentally. The 400 MeV/u 12C6+ and 200 MeV/u 129Xe54+ were stored and cooled in the experimental ring CSRe, and the cooling force was measured in different conditions.

关键词： heavy ion beam beam accumulation electron cooling cooling force

Commissioning of electron cooling in CSRe

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Chinese physics C 2010年第7期34卷 998-1004页

作者：杨晓东冒立军李国宏李杰马晓明晏太来原有进宋明涛杨建成刘勇赵铁成夏佳文张玮高大庆周忠祖燕宏斌毛瑞士何源韩少斐郑建华杨晓天赵红卫肖国青殷达钰李朋贾欢 Parkhomchuk Vasily Reva Vladimir Skorobogatov Dmitry institute of Modern physics CAS budker institute of nuclear physics

The 400 MeV/u 12C6＋ ion beam was successfully cooled by the intensive electron beam near 1 A in *** momentum cooling time was estimated near 15 *** cooling force was measured in the cases of difierent electron beam profiles,and the difierent angles between the ion beam and electron *** lifetime of the ion beam in CSRe was over 80 *** dispersion in the cooling section was confirmed as positive close to *** beam sizes before cooling and after cooling were measured by the moving *** beam diameter after cooling was about 1 *** bunch length was measured with the help of the signals from the beam position *** difiusion was studied in the absence of the electron beam.

关键词： CSRe electron cooling hollow electron beam

Gas-cooled thorium reactor at various fuel loadings and its modification by a plasma source of extra neutrons

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nuclear Science and Techniques 2019年第12期30卷 72-82页

作者： Andrey Arzhannikov Sergey Bedenko Vladimir Shmakov Vladimir Knyshev Igor Lutsik Vadim Prikhodko Igor Shamanin budker institute of nuclear physics SB RAS NovosibirskRussia 630090 National research Tomsk Polytechnic University TomskRussia 634050 Russian federal nuclear center–Zababakhin institute of Applied physics SnezhinskRussia 456770

This work presents the results of computer simulation of neutronic processes in a high-temperature gas-cooled thorium reactor for 30 different options of core *** guarantee stable and long-term reactor operation(7-10 years),the quantity of fuel compact dispersion phase and starting fuel composition was *** is demonstrated that it is possible in principle to substitute the near-axial recirculation zone of the reactor core by a long magnetic trap with a high-temperature plasma column for generating thermonuclear *** distribution of neutron yield along the length of the plasma source is also *** a thorium reactor,with a near-axial source of extra neutrons,can be applied for researching thermophysical and neutronic characteristics of dispersion thorium fuel to improve its *** results of the work are of great interest from the perspective of future advancement of the thermonuclear power industry,by means of creation of a hybrid installation based on a thorium reactor with a long plasma column as a source of additional neutrons.

关键词： Low-power thorium reactor Thorium hybrid reactor nuclear fuel evolution

Numerical 3D-modeling of spall and shear fractures in shells of austenitic 12Kh18N10T steel and 30KhGSA steel under their spherical and quasi-spherical explosive loading

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International Journal of Modeling, Simulation, and Scientific Computing 2015年第1期6卷 173-211页

作者： Evgeny A.Kozlov Oleg V.Ol’khov Ekaterina V.Shuvalova Russian federal nuclear center–Zababakhin research institute of Technical physics Snezhinsk Russia Russian federal nuclear center–research institute of Experimental physics Sarov Russia

To pursue VNIIEF–VNIITF joint investigations,this paper briefly describes the experimental setup and provides numerical 3D-computation results(LEGAK-3D technique)on special features in the convergence dynamics of steel shells under their quasi-spherical explosive loading in the system with the 40-mm outer radius of the explosive *** computation results were compared with the data experimentally registered for shells of the 30KhGSA steel,both as-received and quenched to HRC 35...40,and the austenitic 12Kh18N10T stainless *** comparison was also made with laserinterferometry results obtained directly under explosive loading,as well as with gammatomography and scanning electron microscopy investigations of the recovered shells.

关键词： Convergence dynamics of shell spall and shear damages explosive loading

Measurement of R at VEPP-2000

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Chinese physics C 2010年第6期34卷 669-674页

作者： I.B.Logashenko budker institute of nuclear physics Novosibirsk State University

The new e^＋e^- storage ring, VEPP-2000, is being commissioned at budker institute of nuclear physics, Novosibirsk. Measurement of the total cross section e^＋e^- → hadrons in the whole VEPP-2000 energy range is one ... 详细信息

关键词： hadrons pion form factor cross section muon magnetic moment