An Experiment to Measure the Relative Velocities of Gamma Rays and Electrons at 15 GeV. |
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accelerator angular distribution aperture areas of phase arrival time difference Av/c beam envelope BEAM TRANSPORT SYSTEM BEAMGATE bremsstrahlung broadening CHAPTER collimator conversion targets deflection distribution of positrons Doctor of Philosophy downstream drift length due to gammas effects electron and gamma electron and photon electron beam electron images equation EXPECTED AND OBSERVED experiment experimental flux fractional shift fundamental length gamma images gamma peak gamma rays gamma target GeV/c high energy horizontal magnet B60 measurement meters microradians millimeter milliradians misalignment momentum acceptance multiple scattering MWPC ORDER TRANSPORT MATRIX pair production particles peak separation phase jitter photons picoseconds plane plastic scintillators positron beams positrons due primary beam quadrupole quadrupole magnets radiation lengths relative velocity difference RFS Phase secondary beamline sector 22 target sensitivity shown in Figure SLAC special relativity standard deviation steering t₁ Table TRANSPORT MATRIX ELEMENTS VERTICAL DISPLACEMENT vertical phase space waveguide