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| Total Pages | : 10 |
| Release | : 1995 |
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Download The PEP-II Design Book in PDF, ePub and Kindle
The Stanford Linear Accelerator Center (SLAC), Lawrence Berkeley Laboratory (LBL), Lawrence Livermore National Laboratory (LLNL) Positron Electron Project-II (PEP-II) is a design for a high-luminosity, asymmetric energy, electron-positron colliding beam accelerator that will operate at the center-of-mass energy of the [Upsilon]4S (10.58 GeV). The goal of the design is to achieve a large enough integrated luminosity with a moving center-of-mass reference frame to he able to observe the predicted rare decay modes of the [Upsilon]4S that do not conserve charge parity (CP).
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| Total Pages | : 8 |
| Release | : 1993 |
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Download The PEP-II Project Book in PDF, ePub and Kindle
The PEP-II project, a joint proposal of SLAC, LBL, and LLNL, will involve an upgrade of the PEP storage ring at SLAC to serve as an asymmetric B factory. The upgrade will involve replacing the vacuum and rf systems of PEP, which will serve as the high-energy ring (containing 9 GeV electrons), along with the addition of a new low-energy ring (containing 3.1 GeV positrons) mounted atop the high-energy ring. The present design status of the project and a summary of recent R & D results are presented here. If approved, the PEP-II project is ready to begin construction in October 1993.
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| Total Pages | : 4 |
| Release | : 2004 |
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Download PEP-II Asymmetric B Factory Book in PDF, ePub and Kindle
PEP-II, a 9 GeV x 3.1 GeV ee− collider with a design luminosity of 3 x 1033 cm−2s−1, was proposed jointly by SLAC, LBL, and LLNL. Recent efforts have continued towards an optimized design. In addition, an aggressive R & D program is under way to validate our design choices. Fabrication of a low-power prototype RF cavity is complete, and impedance measurements are beginning. A 500-kW, 476-MHz klystron has been completed; it will be used for testing both high-power RF windows and a prototype high-power cavity (now under design in collaboration with Chalk River Laboratory). Vacuum studies have demonstrated that chambers with suitable photodesorption properties can be fabricated. A mock-up of the two-ring arc area has been completed and used to investigate alignment and stability issues. The PEP-II project is ready to begin construction as soon as funds become available.
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| Total Pages | : 641 |
| Release | : 1993 |
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Download PEP-II Book in PDF, ePub and Kindle
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| Total Pages | : 5 |
| Release | : 1993 |
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Download PEP-II Design Update and R & D Results Book in PDF, ePub and Kindle
We describe the present status of the PEP-II asymmetric [beta] factory design undertaken by SLAC, LBL, and LLNL. Design optimization during the past year and changes from the original CDR design are described. R D activities have focused primarily on the key technology areas of vacuum, RF, and feedback system design. Recent progress in these areas is described. The R D results have verified our design assumptions and provide further confidence in the design of PEP-II.
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| Total Pages | : 4 |
| Release | : 1994 |
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Download The PEP-II Asymmetric B Factory Book in PDF, ePub and Kindle
PEP-II, a 9 GeV x 3.1 GeV electron-positron collider with a design luminosity of 3 x 1033 cm−2s−1 has now been approved for construction by SLAC, LBL and LLNL for the purpose of studying CP violation in the B{bar B} system. This upgrade project involves replacing the vacuum and RF systeum of PEP, which will serve as the high-energy ring (HER), along with the addition of a new low-energy ring (LER) mounted atop the HER. Designs for both rings are described, and the anticipated project construction schedule is indicated. Collider operation will begin at the end of 1998. An aggressive R & D program has been carried out to validate our design choices; key results in the areas of lattice design, vacuum, RF, and multibunch feedback are summarized.
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| Total Pages | : 6 |
| Release | : 1998 |
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Download PEP-II Status Report Book in PDF, ePub and Kindle
The main design features of the PEP-II asymmetric two-ring electron-positron B Factory collider, built at the Stanford Linear Accelerator Center, are described. This facility will complete construction in June 1998. The high energy ring, completed in May 1997, has had 3 months of commissioning and successfully stored 0.75 A of electrons. The success of the high energy ring testing validates not only its ring components, but also the injection system, the RF system and the control system all of which are common to the two rings.
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| Total Pages | : 3 |
| Release | : 2003 |
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Download The Optical Design of the PEP-II Injection Beamlines Book in PDF, ePub and Kindle
The optical design of the PEP-II electron and positron Injection Beamlines is described. Use of the existing high power, low emittance beams available from the SLC damping rings require that pulsed extraction of 9.0 GeV electrons and 3.1 GeV positrons for injection into the PEP-II rings occur in the early sectors of the accelerator. More than 5 kilometers of new beam transport lines have been designed and are being constructed to bring these beams to their respective rings. The optical design maximizes the tolerance to errors especially to those contributing to beam size and position jitter. Secondly, the design minimizes costs by utilizing existing components or component designs and minimizing the number required. Here we discuss important attributes including choice of lattice, specification of error tolerances, including errors in construction, alignment, field errors, power supply stability, and orbit correction.
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| Total Pages | : 3 |
| Release | : 1992 |
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Download PEP-II Asymmetric B Factory Book in PDF, ePub and Kindle
PEP-II, a 9 GeV [times] 3.1 GeV e[sup +]e[sup [minus]] collider with a design luminosity of 3 [times] 10[sup 33] cm[sup [minus]2][sub s][sup [minus]1], was proposed jointly by SLAC, LBL, and LLNL. Recent efforts have continued towards an optimized design. In addition, an aggressive R D program is under way to validate our design choices. Fabrication of a low-power prototype RF cavity is complete, and impedance measurements are beginning. A 500-kW, 476-MHz klystron has been completed; it will be used for testing both high-power RF windows and a prototype high-power cavity (now under design in collaboration with Chalk River Laboratory). Vacuum studies have demonstrated that chambers with suitable photodesorption properties can be fabricated. A mockup of the two-ring arc area has been completed and used to investigate alignment and stability issues. The PEP-II project is ready to begin construction as soon as funds become available.
| Author | : Michael S. Zisman |
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| Release | : 2006 |
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Download The PEP-II Project Book in PDF, ePub and Kindle
We describe the present status of the PEP-II project. The project comprises four major systems: Injector, High-Energy Ring (HER), Low-Energy Ring (LER), and Interaction Region (IR). We focus in detail on the design of the LER, as its parameters and requirements are most closely related to those required for the Beijing Tau-Charm Factory rings. The PEP-II LER is a high-current, 3.1-GeV positron ring mounted above the 9-GeV HER. The LER uses a wiggler located in one of its six straight sections to provide emittance control and additional damping. We describe the rather complicated IR, which must transport the LER beam into the plane of the HER, focus it to a common beam size, and separate the beams after the head-on collisions. Both permanent magnet and conventional electromagnets are used in this area. The LER lattice has now adopted a simplified non-interleaved sextupole correction scheme that has reduced the required number of sextupoles substantially. We describe the LER vacuum system, one of the most challenging subsystems in PEP-II. It employs several technologies. In the arcs, aluminum extrusions and titanium sublimation pumps are employed; the straight sections use stainless steel chambers with lumped ion pumps. In the wiggler area, an extended copper photon dump with nonevaporable getter (NEG) pumps is employed to handle the very large synchrotron radiation power. The design of the room-temperature RF system, the bunch-by-bunch longitudinal and transverse feedback systems, and some of the special diagnostics will be described briefly. The PEP-II project remains on schedule to begin commissioning of the HER in April 1997, followed by the LER a year later.
