نتایج جستجو برای: particle accelerator
تعداد نتایج: 189238 فیلتر نتایج به سال:
The two main functions of the NLC extraction line include: 1) transmission of the outgoing disrupted beam and secondary particles to the dump with minimal losses; and 2) beam diagnostics and control. In this report, we describe the extraction line optics, present the results of tracking studies, and discuss the extraction line instrumentation. Presented at the 1999 IEEE Particle Accelerator Con...
The SSRL is investigating an accelerator upgrade project to replace the present 130 nm·rad FODO lattice with an 18 nm·rad double bend achromat lattice: SPEAR 3. In this paper, we review the methods used to maximize the SPEAR 3 dynamic aperture including optimization of linear optics, betatron tune, chromaticity and coupling correction, and effects of machine errors and insertion devices. Presen...
To prepare for the PEP-II turn on, we have studied one commissioning strategy with simulated lattice errors. Features such as difference and absolute orbit analysis and correction are discussed Poster paper at Particle Accelerator Conference Vancouver, B.C., Canada, May, 1997 * Work supported by Department of Energy contract DE-AC03-76SF00515 SLAC-PUB-7500 May 1997 LATTICE COMMISSIONING STRATEG...
We report on the manufacture of a first batch of approximately 2,000 Gas Electron Multipliers (GEMs) using 3M’s fully automated roll to roll flexible circuit production line. This process allows low-cost, reproducible fabrication of a high volume of GEMs of dimensions up to 30×30 cm. First tests indicate that the resulting GEMs have optimal properties as radiation detectors. Production techniqu...
Clouds of low energy electrons in the vacuum beam pipes of accelerators of positively charged particle beams present a serious limitation for operation at high currents. Furthermore, it is difficult to probe their density over substantial lengths of the beam pipe. We have developed a novel technique to directly measure the electron cloud density via the phase shift induced in a TE wave transmit...
The primary physics goals of a high luminosity e+e− flavor factory are discussed, including the possibilities to perform detailed studies of the CKM mechanism of quark mixing, and constrain virtual Higgs and nonstandard model particle contributions to the dynamics of rare Bu,d,s decays. The large samples of D mesons and tau leptons produced at a flavor factory will result in improved sensitivit...
We have integrated the electron-cloud code POSINST [1] with WARP [2]–a 3-D parallel Particle-In-Cell accelerator code developed for Heavy Ion Inertial Fusion–so that the two can interoperate. Both codes are run in the same process, communicate through a Python interpreter (already used in WARP), and share certain key arrays (so far, particle positions and velocities). Currently, POSINST provide...
Y. I. Kim, R. Ainsworth, A. Aryshev, S. T. Boogert,* G. Boorman, J. Frisch, A. Heo, Y. Honda, W.H. Hwang, J. Y. Huang, E-S. Kim, S. H. Kim, A. Lyapin, T. Naito, J. May, D. McCormick, R. E. Mellor, S. Molloy, J. Nelson, S. J. Park, Y. J. Park, M. Ross, S. Shin, C. Swinson, T. Smith, N. Terunuma, T. Tauchi, J. Urakawa, and G. R. White Kyungpook National University, Daegu, Korea John Adams Institu...
At the present time, there are a number of future linear collider designs with a center-of-mass energy of 500 GeV or more with luminosities in excess of 10 cm 2 s . Many of these designs are at an advanced state of development. However, to attain the high luminosity, the colliders require very small beam emittances, strong focusing, and very good stability. In this paper, some of the outstandin...
Abstract Progress in particle accelerator technology makes it possible to use a proton accelerator to produce energy and to eliminate nuclear waste efficiently. The Energy Amplifier (EA), proposed by Carlo Rubbia and his group, is a subcritical fast neutron system driven by a proton accelerator. It is particularly attractive for destroying, through fission, transuranic elements produced by pres...
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