Stanford, C 010430

Excerpt: ... Participants Fabio Anulli Instituto Nazionale di Fisica Nucleare Laboratori Nazionali di Frascati David Aston Stanford Linear Accelerator Center Virginia Azzolini Universit degli studi di Ferrara Rinaldo Baldini Instituto Nazionale di Fisica Nucleare Laboratori Nazionali di Frascati Wander Baldini Instituto Nazionale di Fisica Nucleare Universit degli studi di Ferrara Teresa Barillari University of Colorado Diego Bettoni Instituto Nazionale di Fisica Nucleare Universit degli studi di Ferrara M.E. Biagini Instituto Nazionale di Fisica Nucleare Laboratori Nazionali di Frascati Vittorio Bidoli Instituto Nazionale di Fisica Nucleare Universit degli studi di Roma Gerard Bonneaud Ecole Polytechnique Peter Bosted University of Massachusetts Tullio Bressani Universit degli studi di Torino Stanley Brodsky Stanford Linear Accelerator Center Roberto Calabrese Instituto Nazionale di Fisica Nucleare Universit degli studi di Ferrara Carl Carlson College of William and Mary Gianluigi Cibinetto Universit degli studi ...

Cornell, WORKSHOP 2003

Excerpt: ... Linear Accelerator Based X-Ray Sources: Temporal and Spatial Coherence J. B. Hastings SSRL Stanford Linear Accelerator Center Accelerator based synchrotron radiation (SR) sources are now commonplace in the world with the USA (APS), Japan (Spring-8) and Europe (ESRF) each operating storage ring sources in the hard x-ray energy range that provide unique radiation for studies in the chemical, biological and materials sciences. These sources are critical to the understanding of complex static structures and through inelastic x-ray scattering the dynamics. They have also been applied to time resolved diffraction on the scale of the photon pulse length ~100 psec. Photon beams with all the properties of SR but with pulse lengths of ~100fsec are now available from linear accelerator based sources, for example the Sub-Picosecond Pulse Source (SPPS) at the Stanford Linear accelerator Center (SLAC). X-ray free electron lasers providing unprecedented pulse intensities, full transverse coherence, and pulse lengths of ~ 10 ...

Stanford, PUBS 10000

Excerpt: ... SLAC-PUB-10039 KEK-PREPRINT-93-190 Submitted to the 6th Advancd ICFA Beam Dynamics Workshop, Funchal, Madeira, 24-30 Oct 1993. Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309, USA ...

Stanford, PUBS 1750

Excerpt: ... SLAC-PUB-1993 August 19 77 (T/E) SOME CONSEQUENCES OF A SCALE BREAKING MODEL IN ELECTRON AND NEUTRINO DEEP INELASTIC SCATTERING* A. Fernandez-Pachecot, J. A. Grifolst? and Ivan A. Schmidtttt Stanford Linear Accelerator Center Stanford University, Stanford, California 94305 ABSTRACT We analyze electron and neutrino deep inelastic processes, extending a simple parton model explanation of the approach to scaling observed in electroproduction experimental at large x. The model is successful in fitting the present effects from asymptotic freedom data without any explicit or new quarks. different This model has a large q2 behavior which is quite from that expected in asymptotic freedom (AF) theories and to data can be used to sharpen any experimental demon- comparisoas stration of AF effects. Of course, the model is consistent with AF and both effects could be present. (Submitted for publication. ) *Work supported in part by the Energy Research and Development Administration. TOn leave from Departam ...

Stanford, PUBS 7250

Excerpt: ... SLAC-PUB-7330 October 1996 Diffraction model of a step-out transition beam in planar geometry* F. Zimmerman and for a sheet A.W. Chao Stanford Linear Accelerator Center Stanford University, Stanford, California 94309 Using a diffraction model, we derive the longitudinal for a sheet impedance of a small step-out transition nar geometry. high-frequency beam in pla- Presented at the 1996 DPF/DPB Summer Study on New Directions for High-Energp Phgsics (Snowmass 96), Snowmass, Colorado, June 25- July 12, 1996 *Work supported by Department of Energy contract DE-AC03-76SFO0515. sLAc-Pm-7330 October 1996 Diffraction model of a step-out transition for a sheet beam in planar geomet~ 94300 F. Zimmerman and A. W. Chao Stanford Linear Accelerate< Stanford UniversiQ, Stanford, Cal#omia ABSTRACT Using a diffraction model, we derive the longitudinal highfrequency impedance of a small step-out transition for a sheet beam in planar geometry. III. Outlook 1. Sheet Beam and Planar Impedance Consider an infini ...

Stanford, PUBS 0750

Excerpt: ... SLAC-PUB-966 WC) September 1971 RECIRCULATION OF THE SLAC BEAM* M. A. Allen, R. H. Helm, G. A. Loew, R. B. Neal and P. B. Wilson Stanford, California 94305 W. B. Herrmannsfeldt, Stanford Linear Accelerator Center, Stanford University, Abstract The intent of this proposal is to boost the energy of the SLAC beam into the 40 GeV range by recycling the electrons through the accelerator for a second pass. In order to use the normal klystron repetition rate (360 pps), the beam must be stored for the entire interpulse period (2.8 ms). Storage would be achieved in a 6.9 km-long path extending over the entire length of the accelerator housing. The direction of the beam would be reversed in magnet loops located at the ends of the accelerator. Beam energy losses due to synchrotron radiation would be made up by a room temperature linac operating at the accelerator frequency (2856 MHz). At the end of the storage interval, corresponding to about 122 revolutions, the beam would be reinjected into the accelerator to be a ...

Wisconsin, UM 2008

Excerpt: ... Atomic and Molecular Science at the LCLS Free Electron Laser J. D. Bozek LCLS, Stanford Linear Accelerator Center, 2575 Sand Hill Rd., Menlo Park, CA 94025 The Linac Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center (SLAC) is nearing completion with first light into the experimental areas anticipated in July 2009. The LCLS will be the first of several x-ray free electron lasers (xFELs) being built around the world to become operational. The LCLS will produce ultrafast (~100 fs) ultraintense (1012 1013 photons) pulses of radiation in the x-ray (1.5 15) range at a rate of 120 Hz. A suite of instruments is being built at SLAC to utilize this unique source of x-rays to study a wide variety of samples ranging from atoms to biological molecules and cells as well as solid materials. The first instrument scheduled to become operational at LCLS will be the Atomic, Molecular and Optical (AMO) science end-station which is designed to study the interaction of the intense LCLS ...

Stanford, E 158

Excerpt: ... STANFORD LINEAR ACCELERATOR CENTER LC BANDPASS FILTER SPECIFICATION #2 Rev. 3 Center Frequency: 5.122 MHz +/-10 kHz, where 'center frequency' is the geometric mean of the upper 3dB frequency and the lower 3dB frequency. 3dB passband: 100 kHz minimum (see note below) 60dB passband: 1.00 MHz maximum (see note below) Insertion loss at center frequency: < 6dB Minimum return loss (S11) within the frequency band from 5.072 MHz to 5.172 MHz: > 15dB Impedance: 50 ohms Reliability: Will maintain specs at 0-70 deg. C operating temperature for more than 3 years. All components inside the filter are to be fixed value components, particularly, trimmer capacitors or variable resistors are not to be incorporated. RF shielding case must seal against standard P.C. board cleaning solvents. Package type: surface mount, to be same package as Bandpass Filter model: FN-2906 Filter shielding can ...

Stanford, PUBS 1500

Excerpt: ... I SLAC-PUB-1658 October 19 75 (T/E) MASSIVE PAIR PRODUCTION AND HADRONIC STRUCTURE" C. T. Sachrajdat and R. Blankenbecler Stanford Linear Accelerator Center Stanford University, Stanford, California 94305 ABSTRACT A brief review of the constituent theory of massive pair production for hadron, photon, and lepton beams is presented. to a physical description the classic Drell-Yan pairs from different of new production Emphasis is given mechanisms in addition to for hadron and lepton characterization of process, and to predictions A kinematic incident beams. the cross section arising from a general mechanism is given in terms of simple counting rules. ing the parameters regimes is stressed. The importance of experimentally in different determin- of the characterization kinematic A subtitle of this note could be "What to do with .your data when you don't find the D's. `I (Submitted to Nucl. Phys. B. ) *Work supported by the U. S. Energy Research and Development Administration. THarkness Fellow. ...

Stanford, PUBS 0500

Excerpt: ... SLAC -PUB-636 August 1969 (TH) and (EXP) RELATIONS BETWEEN CROSSING SYMMETRIC PROCESSES* E. A. Paschos Stanford Linear Accelerator Center Stanford University, Stanford, California 94305 ABSTRACT Relations between processes related by crossing are proposed as a test of (i) exchange degeneracy, (ii) dominance by trajectories of the same signature. Various possible experiments are discussed. * Work supported by the U.S. Atomic Energy Commission. The Regge analytic continuation of the u-channel amplitudes gives the high energy behavior for both the s- and t-channel processes in the neighborhood of u = 0. Therefore, both regions a r e mediated by the same Regge trajectories. For two general classes of exchanges the c r o s s sections of the two channels are identical in the high energy limit, except for known phase-space factors. We review here the argument that leads to these relations, and then discuss 1 processes which must obey them, a s well a s the kinematic regions where they are expected to hold. ...

Stanford, PUBS 0500

Excerpt: ... SLAC- PUB- 635 July 1969 (TH) and (EXP) Photon-Photon Scattering Contribution to the Sixth Order Magnetic Moment of the Muon Janis Aldins t Laboratory of Nuclear Studies, Cornell University, Ithaca, New York Stanley J. Brodsky Stanford Linear Accelerator Center, Stanford University, Stanford, California Andrew J. Dufner Stanford Linear Accelerator Center, Stanford University, Stanford, California Toichiro Kinoshita Laboratory of Nuclear Studies, Cornell University, Ithaca, New York * ABSTRACT A calculation of the three photon exchange (electron loop) contribution to the sixth order anomalous magnetic moment of the muon is reported. The result, which contains a logarithmic dependence on the muon to electron mass ratio, brings the theoretical prediction into agreement with the CERN measurements, within the one standard deviation experimental accuracy. (Submitted to Physical Review Letters) q. Work supported in part by the U. S. Atomic Energy Commission and the U. S. Office of Naval Research. NDFA fellow. ...

Stanford, PUBS 0250

Excerpt: ... s~c-~u~-318 June 1967 NEW JOINING TECHNIQUE FOR WATER-COOLED COPPER MAGNET COILS* Jack Gunnt Lawrence Radiation Laboratory University of California, Berkeley, California and Gerald Fritzke Stanford Linear Accelerator Center Stanford University, Stanford, California (Paper to be presented at the Second International Magnet Technology, Oxford, England, July 11-14, Conference on 1967) * Work supported by U. S. Atomic Energy Commission. J. `Formerly with Stanford Linear Accelerator Center, Stanford University, Stanford, California. New Joining Technique for Water-Cooled Magnet Coils The most widely used technique for joinin, r hollow copper magnet coil conductor is silver brazing. Although this is a highly-reliable technique, occasional water leaks have takes place and entire magnetoccurred at improperly-prepared joints. Short-circuiting coil assemblies have had to be removed for repair. The defect that occurs most frequently in silver-brazing is porosity in the joint. Thermal cycling of the coil ...

Stanford, PUBS 1250

Excerpt: ... . Rev. Letters 14, 670 (1965), and Phys. Rev. 143' 1269 (1966); K. J. Barnes, P. Carruthers, and F. von , Hippel, Phys.R.ev. Letters 14, 82 (1965). For a discussion of the constituent quark model states and the assignment of observed hadrons see F. J. Gilman in Experimental Meson Spectroscopy - 1972, AIP Conference Proceedings No. 8, edited by A.H. Rosenfeld and K.W. Lai (American Institute of Physics, New York, 1972); p. 460; R. H. Dalitz, invited paper presented at the Triangle Meeting on Low Energy Hadron Physics, Nov. 5-7, 1973 and Oxford preprint, 1974 (unpublished); J. L. Rosner, Phys. Reports (to be published) and Stanford Linear Accelerator Center Report No. SLAC-PUB-1391, 1974 (unpublished); M. Bowler, invited talk at this conference. Older work on current algebra renresentation mixing is reviewed bv H. Harari in Spectroscopic and Group Theoretical Methods in Physics (North Holland, Amsterdam, 1968), p. 363, particularly for baryons, and in F. J. Gilman and H. Harari, Phys. Rev. 165, 1863 (1968)for m ...