BEPC‐IID介子能量刻度利用在e+e-对撞质心系能量为3.773 GeV 处 D介子成对产生的特性,利用重建单标记D介子的能量发展了刻度BEPC‐II质心系能量的方法.利用此方法,可以离线精确刻度BESIII探测器在3.773 GeV 附近采集数据时BEPC‐II的质心系能量.郑波荣刚...
(BEPC)wasconstructedandoperatedsuccessfullysince1989.TheearlierRFsysteminBEPCconsistsoftwo200MHznormal-conducting(NC)cavitiesprovidingtotalRFvoltageof1MV.TheRFpowerwassuppliedtotwoRFcavitiesbyeightsetsoftetrodetransmitterof25KWwithcoaxialwave-guide.Namely,combinedfoursetsoftransmitterspoweronecavity,respectively.For...
BEPC II injector以2.856GHz頻率上相位控制達到±2°為目標,闡述北京正負電子對撞機重大改造工程注人器相控系統設計思路,提出相應的系統實現結梅.在分析相控過程的基礎上,分解系統指標,把它作為相控系統詳細設計和關鍵部件測試的依據.最後,針對相位測量這一關鍵問題,給出了具體的實現方法.高文春...
The BEPC-II collider beam energy calibration system is discussed. The system is based on the Compton backscattering method. The expected precision of the electron and positron beam energy ε determination is δε / ε≈ 3 ⋅ 10 − 5....
The BEPC-II lattice design calls for the same high quality integral quadrupole field and large good field region in both apertures for each magnet. Two-dimensional contour optimization and pole-end chamfer iteration are used to minimize the systematic harmonic errors. Unexpected non-systematic errors...
Event receiverEmbedded systemZYNQ SoCPurpose The event receiver is an important component of the BEPC-II timing system. It receives event codes from the event generator and then generates triggers and interrupts. The currently applied event receiver is implemented in a single FPGA board, which has...
This is a status report of the project on befalf of the BEPC II team. BEPC II is a major upgrade of the BEPC (Beijing Electron-Positron Collider). It is a double-ring e+-e- collider as well as a synchrotron radiation (SR) source with its outer ring, or SR ring. As a collider,...
The status of the BEPC-II e+e- collider and the new BES-III detector is reviewed.OlsenUniversityStephenUniversityL.UniversityAIP Conference ProceedingsWANG Jiu-Qing. Status of BEPC , the BES Collabo- ration Summer 2009 MeetingWANG Jiu-Qing.Status of BEPC. the BES Collabo-ration Summer 2009 ...
BEPC IIIntegration frameworkFault diagnosisData miningMachine learningBackgroundBEPC II is an electron鈥損ositron collider with a beam energy of 1.89 GeV and luminosity of 1 脳 1033 cm2 s1. Being a complex accelerator, fault diagnostics both in an accurate manner and in time are often ...
王莉杜宏鹏杨光达崔杰诗刘孝坤贾林祥哈尔滨工业大学学报王莉,杜宏鹏,杨光达,崔杰诗,刘孝坤,贾林祥.  BEPC II低温冷却系统的热力设计及数值模拟[J]. 哈尔滨工业大学学报. 2007(03)王莉,杜宏鹏,杨光达,崔杰诗,刘孝坤,贾林祥.BEPC II低温冷却系统的热力设计及数值模拟[J]. 哈尔滨工业大学学报.2007(03)...