Applications of Beam Diagnostic System at the VEPP-4 (original) (raw)

Advanced applications of the beam diagnostic systems installed at the 6GeV electron-positron collider VEPP-4M and its 2GeV booster VEPP-3 (1), are described. The systems are based on a turn-by-turn processing of signal measured by electrostatic beam position monitors (2). A technique for beta function correction has been used for adjustment of the VEPP-4M magnet structure. This technique is based on measurement of amplitude of free coherent betatron oscillations, proportional to the square root of beta function. Results of the measurements are given. A new method for observation of non-linear betatron motion on phase space, using a single beam position monitor, was developed. This method has been tested by computer simulation, and successfully used to study nonlinear beam dynamics on the VEPP-4M. Results of numerical tests and beam measurements are presented. The diagnostic system is applied too for high resolution measurement of low frequency beam vibrations. Results obtained at th...