继2007年2月初BEPCII电子环成功调束并达到预期目的后,中科院高能所加速器中心对正电子输运线和储存环的硬件系统及物理方案做了精心准备。3月4日正电子环成功实现正电子束流积累,正电子束流强度达到8mA。这是BEP-CII继同步辐射环、电子环调束后取得的又一重大进展。BEPCII正电 Following the successful tuning of the BEPCII electronic ring in early February 2007 and its expected purpose, the Accelerator Center of the High Energy Institute of CAS has carefully prepared the hardware systems and physical solutions for positron transport lines and storage rings. On March 4, the positron annulus successfully accumulated positron beam and the positron beam intensity reached 8mA. This is another major progress made by BEP-CII following the synchrotron radiation ring and electronic ring beam modulation. BEPCII positive