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Title: Results and Plans of the PEP-II B-Factory

Abstract

PEP-II is an e{sup +}e{sup -} B-Factory Collider located at SLAC operating at the Upsilon 4S resonance (3.1 GeV x 9 GeV). PEP-II has delivered, over the past five years, an integrated luminosity to the BaBar detector of about 240 fb{sup -1} and has reached a luminosity of 9.21 x 10{sup 33}/cm{sup 2}/s. Steady progress is being made in reaching higher luminosity. The goal over the next several years is to reach a luminosity of at least 2.4 x 10{sup 34}/cm{sup 2}/s. The accelerator physics issues being addressed in PEP-II to reach this goal include the electron cloud instability, beam-beam effects, parasitic beam-beam effects, high RF beam loading, shorter bunches, lower beta y interaction region operation, and coupling control. A view of the PEP-II tunnel is shown in Figure 1. The present parameters of the PEP-II B-Factory are shown in Table 1 compared to the design. The present peak luminosity is over three times the design and the best integrated luminosity per month is 16 fb{sup -1} that is five times the design. The highest luminosity per month is shown in Figure 2. The integrated luminosity over a month is shown in Figure 3 and the total integrated luminosity inmore » Run 4 in shown in Figure 4. The progress in integrated luminosity has come from correcting the orbits, lowering beta y, moving the fractional horizontal tunes in both rings to just above the half integer (<0.52), and trickle injection of both beams.« less

Authors:
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (US)
OSTI Identifier:
827331
Report Number(s):
SLAC-PUB-10547
TRN: US0403287
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 6 Jul 2004
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; CLOUDS; DESIGN; ELECTRONS; INSTABILITY; LUMINOSITY; PHYSICS; RESONANCE; STANFORD LINEAR ACCELERATOR CENTER

Citation Formats

Seeman, J. Results and Plans of the PEP-II B-Factory. United States: N. p., 2004. Web. doi:10.2172/827331.
Seeman, J. Results and Plans of the PEP-II B-Factory. United States. https://doi.org/10.2172/827331
Seeman, J. 2004. "Results and Plans of the PEP-II B-Factory". United States. https://doi.org/10.2172/827331. https://www.osti.gov/servlets/purl/827331.
@article{osti_827331,
title = {Results and Plans of the PEP-II B-Factory},
author = {Seeman, J},
abstractNote = {PEP-II is an e{sup +}e{sup -} B-Factory Collider located at SLAC operating at the Upsilon 4S resonance (3.1 GeV x 9 GeV). PEP-II has delivered, over the past five years, an integrated luminosity to the BaBar detector of about 240 fb{sup -1} and has reached a luminosity of 9.21 x 10{sup 33}/cm{sup 2}/s. Steady progress is being made in reaching higher luminosity. The goal over the next several years is to reach a luminosity of at least 2.4 x 10{sup 34}/cm{sup 2}/s. The accelerator physics issues being addressed in PEP-II to reach this goal include the electron cloud instability, beam-beam effects, parasitic beam-beam effects, high RF beam loading, shorter bunches, lower beta y interaction region operation, and coupling control. A view of the PEP-II tunnel is shown in Figure 1. The present parameters of the PEP-II B-Factory are shown in Table 1 compared to the design. The present peak luminosity is over three times the design and the best integrated luminosity per month is 16 fb{sup -1} that is five times the design. The highest luminosity per month is shown in Figure 2. The integrated luminosity over a month is shown in Figure 3 and the total integrated luminosity in Run 4 in shown in Figure 4. The progress in integrated luminosity has come from correcting the orbits, lowering beta y, moving the fractional horizontal tunes in both rings to just above the half integer (<0.52), and trickle injection of both beams.},
doi = {10.2172/827331},
url = {https://www.osti.gov/biblio/827331}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jul 06 00:00:00 EDT 2004},
month = {Tue Jul 06 00:00:00 EDT 2004}
}