Download or read book Results and Plans of the PEP II B Factory written by and published by . This book was released on 2004 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: PEP-II is an ee− 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−1 and has reached a luminosity of 9.21 x 1033/cm2/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 1034/cm2/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−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 (
Download or read book Status Report and Future Plans for the PEP II B Factory written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book B Physics Physics Beyond The Standard Model At The B Factory Proceedings Of The 1994 International Workshop written by S Suzuki and published by World Scientific. This book was released on 1995-07-14 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume reviews the recent progress of B physics, and discusses theoretical and experimental aspects of the physics which will be explored at the B factory. CP violation and new physics beyond the Standard Model are the main issues of the discussion.
Download or read book PEP II Asymmetric B Factory written by and published by . This book was released on 1992 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The PEP II Asymmetric B Factory written by and published by . This book was released on 1994 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book IR Up Grade Plans for the PEP II B Factory written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: PEP-II, the SLAC, LBNL, LLNL B-factory has achieved a peak luminosity of over 9 x 10[sup 33] cm[sup -2]s[sup -1], more than 3 times the design luminosity, and plans to obtain a luminosity of over 1 x 10[sup 34] cm[sup -2] sec[sup -1] in the next year. In order to push the luminosity performance of PEP-II to even higher levels an upgrade to the interaction region (IR) is being designed. In the present design, the interaction point (IP) is a head-on collision with two strong horizontal dipole magnets located between 21-70 cm from the IP that bring the beams together and separate the beams after the collision. The first parasitic crossing (PC) is 63 cm from the IP in the present by2 bunch spacing. Future improvements to PEP-II performance include lowering the [beta]*[sub y] values of both rings. This will increase the [beta][sub y] value at the PCs which increases the beam-beam effect at these non-colliding crossings. Introducing a horizontal crossing angle at the IP quickly increases the beam separation at the PCs but recent beam-beam studies indicate that a significant luminosity reduction occurs when a crossing angle is introduced at the IP. We discuss these issues and describe the present interaction region upgrade design.
Download or read book PEP 2 Asymmetric B Factory written by and published by . This book was released on 1992 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: PEP-II, a 9 GeV x 3.1 GeV electron-positron collider with a design luminosity of 3 x 1033 cm−2s−1, has been proposed by SLAC, LBL and LLNL as an upgrade of the existing PEP collider. An aggressive R & D program is now under way to validate the design choices. Progress and plans are described for the prototype low- and high-power RF cavities and the prototype 476-MHz, 500-kW klystron, and advances in the bunch-by-bunch longitudinal feedback system are indicated. Gas desorption tests (performed at BNL) on typical vacuum chamber materials are discussed. Progress in designating the IR is outlined and, finally, the tunnel mock-up is described.
Download or read book Progress of the PEP II B Factory written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status and Future Plans of the PEP II B Factory written by and published by . This book was released on 2002 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The PEP-II e+e- collider [1,2,3,4] has been operating for two years with the BaBar detector at the energy of the Upsilon 4S resonance. The peak luminosity has reached 3.3 x 1033/cm2/s with 693 bunches with a positron current of 1.5 A and an electron current of 0.8 A. PEP-II has delivered in excess of 38 fb−1 of data to BaBar. The beam-beam tune shift limits are approaching 0.05-0.07 horizontally and 0.03-0.05 vertically [5]. The electron cloud instability ECI enlarges the positron beam size at high currents but is reduced by a solenoidal field on the vacuum chambers [6]. The beam currents in PEP-II are being raised to increase the number of bunches and the luminosity. Over the next few years the luminosity goal for PEP-II is 1034/cm2/s.
Download or read book Advies aan de Interdepartementale Werkgroep ad hoc inzake de relaties met de minder ontwikkelde landen written by and published by . This book was released on 1961 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impedance Study for the PEP II B factory written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper summarizes results from the impedance study of the components of the PEP-II B-factory.
Download or read book BCP4 written by A. Ichiro Sanda and published by World Scientific. This book was released on 2001 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers the first strong evidence of the existence of CP violation in neutral B decays extracted from sophisticated B factories in the US and Japan. It also holds out the expectation of rare B decays and D, K physics in the near future. In addition, new physics beyond the Standard Model is described. Both experimental and theoretical points of view are given.
Download or read book PEP II written by and published by . This book was released on 1993 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PEP II Asymmetric ital B Factory written by and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: PEP-II, a 9 GeV x 3.1 GeV electron positron collider with a design luminosity of 3 x 1033 cm−2s−1, has been proposed by SLAC, LBL and LLNL as an upgrade of the existing PEP collider. An aggressive R & D program is now under way to validate the design choices. Progress and plans are described for the prototype low- and high-power RF cavities and the prototype 476-MHz, 500-kW klystron, and advances in the bunch-by-bunch longitudinal feedback system are indicated. Gas desorption tests (performed at BNL) on typical vacuum chamber materials are discussed. Progress in designing the IR is outlined and, finally, the tunnel mock-up is described.
Download or read book PEP 2 written by and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proposal for upgrading the existing PEP collider at SLAC to enable the copious production of boosted B mesons is the result of several years of collaborative study by groups representing LBL, LLNL and SLAC. The PEP II design has evolved in a considered fashion from its initial conceptualization to a very advanced level of understanding, well-substantiated by R & D results on the key design issues. We describe the proposed upgrade, review the early conceptual decisions, outline the significant remaining questions, and briefly describe current results from the ongoing R & D effort which have shown these questions to be tractable and the initial concepts to be sound.
Download or read book Physics And Engineering Of High performance Electron Storage Rings And Application Of Superconducting Technology Proceedings Of The Asian Accelerator School written by Zhiyuan Guo and published by World Scientific. This book was released on 2002-02-27 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first Asian Accelerator School (AAS) was organised to show the rapid development of accelerator sciences based on electron storage rings in Asia. At present seven electron-positron colliders are operational in the world, and two of them are located in Asia: KEKB (the KEK B-Factory) at KEK in Japan, and BEPC at IHEP in China. It is also notable that one-third of the operating synchrotron light sources are Asian machines.To further improve the performance of electron storage rings, the use of superconducting magnets and cavities is of vital importance; therefore the curriculum of AAS was arranged not only to teach the basic physics of storage rings but also to give students a basic knowledge of superconducting technology.
Download or read book Proceedings Ecloud 04 written by and published by . This book was released on 2005 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
