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Description: Most existing electron synchrotrons use betatron start for initial acceleration of the particles. The subsequent synchrotron acceleration is then performed with a nearly constant radio-frequency. Investigation of the effect of turn-on rate and initial energy spread is made mathematically. Several advantages are seen for such a technique. (D.C.W.)
Date: January 18, 1962
Creator: Smith, L.W.
Partner: UNT Libraries Government Documents Department

Studies of the Rapid Beam Ejector at the Cosmotron

Description: Extraction of the external beam of the cosmotron with maximum efficiency and minimum duration for measurements of the magnetic moment of the lambda hyperon requires addition of a rapid beam ejector (RBE). Early experiments with the RBE give lower ejection efficiency than the standard ejection system. Reconstruction of the RBE with lengthening of the rise time of the system gives improved values. Computer studies that involve solving the equation of motion for the radial betatron oscillation with time increasing perturbation in one section yield information on particle distributions and result in increases of the turn spacings in RBE to prevent betatron oscillation distribution distortions. Ejection efficiency is now the same with and without the RBE. (D.C.W.)
Date: January 16, 1963
Creator: Barton, M. Q.; Kernan, W.; Novey, T.; Warshaw, S. & Wattenberg, A.
Partner: UNT Libraries Government Documents Department


Description: An investigation was made of Cosmotron intensity versus time through the entire time interval from the beginning of injection to the completion of r-f capture. The induction electrode signal was used for the instartaneous measurement of beam intensity. Oscilloscope displays of the signal were photographed and traced. Base lines were filled in on the tracings and the area of the pulses measured with a polar pianimeter. It was found that the relation losses of beam intensity increase with injection intensity (total injected charge), and that most of the losses take place in the time interval between the end of injection and the completion of the first synchrotron oscillation. (M.C.G.)
Date: January 1, 1962
Creator: Barton, M.Q. & Sacharidis, E.J.
Partner: UNT Libraries Government Documents Department


Description: The Hall mode of operation utilizes a signal derived from the magnetic field of an experimental magnet to provide the power supply regulator with the information necessary for it to regulate the magnet current. Regulation of the field to 0.1% is possible with the Hall probes and regulators used at the Cosmotron. The Hall Effect is a phenomenon whereby the voltage developed across a semiconductor or metal is a function of the current through the material and the magnetic field intensity perpendicular to the direction of current flow. Circuitry is required to maintain the probe at a constant temperature and to maintain a constant Hall current. The output Hall voltage is linearly related to the magnetic field with its absolute value being determined by the level of the Hall current. Instructions for installation and operation of the Hall probes are given. (H.G.G.)
Date: April 1, 1962
Creator: Levine, G.S.
Partner: UNT Libraries Government Documents Department