Abstracts Brochure - CERN

MOPLS045
MOPLS046
MOPLS047
MOPLS048
26-Jun-06 16:00 - 18:00 MOPLS — Poster Session
Achieving a Luminosity of 10 34 /cm 2 /s in the PEP-II B-factory
J. Seeman, F.-J. Decker, S. Ecklund, M.K. Sullivan, U. Wienands
(SLAC)
120
For the PEP-II Operation Staff: PEP-II is an
asymmetric e + e − collider operating at the
Upsilon 4S and has recently set several performance
records. The luminosity has ex-
ceeded 1x10 34 /cm 2 /s and has delivered an integrated luminosity of 728/pb in one day. PEP-II operates in continuous
injection mode for both beams, boosting the integrated luminosity. The peak positron current has reached 2.94 A and
1.74 A of electrons in 1732 bunches. The total integrated luminosity since turn on in 1999 has reached over 333/fb.
This paper reviews the present performance issues of PEP-II and also the planned increase of luminosity in the near
future to over 2 x 10 34 /cm 2 /s. Upgrade details and plans are discussed.
Optimum Damping Rings for an Asymmetric Single-pass Super-B Factory
Submitted for the High Luminosity Study
J. Seeman, Y. Cai (SLAC) M.E. Biagini, P. Raimondi (INFN/LNF) Group: An Asymmetric Single-pass Super-
B Factory needs very rapid emittance damping
between bunch collisions as well as very low resultant beam emittances. These two requirements are difficult to
achieve simultaneously. In this paper the best combination of rapid damping rings, low emittance damping rings
and particle acceleration to reduce synchrotron radiation power requirements is derived. Design parameters for very
flat beams and round beams have been studied.
Design of an Asymmetric Single-pass Super-B Factory
J. Seeman, Y. Cai, A. Novokhatski, M.K. Sullivan, U. Wienands
(SLAC) M.E. Biagini, P. Raimondi (INFN/LNF)
Submitted for the High Luminosity Study
Group for an Asymmetric Single-pass Super-
B Factory: Parameters are being studied for
a high luminosity e + e − collider operating at
the Upsilon 4S that would deliver a luminosity of over 10 36 /cm 2 /s. This collider would use a novel combination of
linear collider and storage ring techniques. In this scheme an electron beam and a positron beam are first stored in
fast-damping and low-emittance damping rings, then extracted, accelerated, compressed and focused to the interaction
point. After collision the two beams are decelerated and re-injected in the damping rings to be damped and
extracted for collision again. The explored beam parameters are similar to those used in the design of the International
Linear Collider, except for the beam energies. Design parameters for very flat beams and round beams have been
studied.
Doubling the PEP-II Luminosity in Simulations
The PEP-II luminosity reached 1x10
Y. Cai, J. Seeman, K.G. Sonnad, U. Wienands (SLAC)
34 cm-2s-
1 in October 2005. The question of how to increase
the luminosity using modest improvements
in the PEP-II accelerator in the coming years is the subject of this paper. We found that the parasitic collisions
significantly degrade the simulated luminosity as the beam currents are increased from 3A and 1.7A to 4A and