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Title: Status Report on PEP-II Performance

Abstract

PEP-II [1-9] is an e{sup +}e{sup -} collider with asymmetric energies (3.1 and 9 GeV, respectively) in a 2200 m tunnel at the Stanford Linear Accelerator Center. The collider produces B mesons to study a particle physics effect called CP violation as well as other physics topics. PEP-II was completed in 1998 with the first luminosity generated in July of that year. The installation of the BaBar Detector was finished in May 1999. The overall layout of PEP-II is shown in Figure 1 and the interaction region of PEP-II in Figure 2. The accelerator parameters and achievements of the High Energy Ring (HER) are listed in Table 1 and those for the Low Energy Ring (LER) in Table 2. The two beams collide at a single point in the IR2 hall where the BaBar detector is located. Beam parameters at the best luminosity are shown in Table 3 and PEP-II milestones in Table 4. In August 1999 PEP-II passed the world's record for luminosity which was 8.1 x 10{sup 32}/cm{sup 2}/s. The present luminosity in PEP-II is 2.15 x 10{sup 33}/cm{sup 2}/s which is 72% of the design. In June 2000 PEP-II delivered an integrated luminosity of 150 pb{sup -1}more » in one day, which is above the design integrated luminosity per day of 135 pb{sup -1}. Over the past year PEP-II has delivered over 12 fb{sup -1} to BaBar. BaBar has logged over 11 pb{sup -1}. The present plan is collide until the end of October 2000 followed by a three month installation period.« less

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
799909
Report Number(s):
SLAC-PUB-8629
TRN: US0206153
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 20 Aug 2002
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; B MESONS; DESIGN; LUMINOSITY; PERFORMANCE; PHYSICS; STANFORD LINEAR ACCELERATOR CENTER

Citation Formats

Matter, Regina S. Status Report on PEP-II Performance. United States: N. p., 2002. Web. doi:10.2172/799909.
Matter, Regina S. Status Report on PEP-II Performance. United States. doi:10.2172/799909.
Matter, Regina S. Tue . "Status Report on PEP-II Performance". United States. doi:10.2172/799909. https://www.osti.gov/servlets/purl/799909.
@article{osti_799909,
title = {Status Report on PEP-II Performance},
author = {Matter, Regina S.},
abstractNote = {PEP-II [1-9] is an e{sup +}e{sup -} collider with asymmetric energies (3.1 and 9 GeV, respectively) in a 2200 m tunnel at the Stanford Linear Accelerator Center. The collider produces B mesons to study a particle physics effect called CP violation as well as other physics topics. PEP-II was completed in 1998 with the first luminosity generated in July of that year. The installation of the BaBar Detector was finished in May 1999. The overall layout of PEP-II is shown in Figure 1 and the interaction region of PEP-II in Figure 2. The accelerator parameters and achievements of the High Energy Ring (HER) are listed in Table 1 and those for the Low Energy Ring (LER) in Table 2. The two beams collide at a single point in the IR2 hall where the BaBar detector is located. Beam parameters at the best luminosity are shown in Table 3 and PEP-II milestones in Table 4. In August 1999 PEP-II passed the world's record for luminosity which was 8.1 x 10{sup 32}/cm{sup 2}/s. The present luminosity in PEP-II is 2.15 x 10{sup 33}/cm{sup 2}/s which is 72% of the design. In June 2000 PEP-II delivered an integrated luminosity of 150 pb{sup -1} in one day, which is above the design integrated luminosity per day of 135 pb{sup -1}. Over the past year PEP-II has delivered over 12 fb{sup -1} to BaBar. BaBar has logged over 11 pb{sup -1}. The present plan is collide until the end of October 2000 followed by a three month installation period.},
doi = {10.2172/799909},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {8}
}

Technical Report:

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