• G.V.Karpov, A.S.Medvedko, E.I.Shubin
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

A series of precise magnetometers on base of pulsed Nuclear Magnetic Resonance (NMR) techniques has been developed in BINP. In the range of 0.025÷13 T error of homogeneous magnetic fields measurements not exceeds (1÷2) ppm, resolution is better than 0.1 ppm. The magnetometers provide automatic search of NMR signal and tracking of the magnetic field. One type of the magnetometers is able to work with aluminum or copper powder as working substances of NMR probes. These probes can be used for measurements of magnetic fields at liquid helium temperature. A special NMR probe with very small sensitive volume (about 1 mm3) has been designed to measure of fields with the gradient up to 150 G/cm. At present NMR magnetometers developed and fabricated in BINP work successfully in some scientific centers in Russia and abroad. The features of the magnetometer's electronics design and more interesting examples of magnetometer's application in charged particle storage rings are presented.

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• E.A.Bekhtenev, E.N.Dementev, S.M.Gurov, G.V.Karpov, P.V.Logatchev,A.S.Medvedko
  Budker Institute of Nuclear Physics, Novosibirsk, Russia

A new beam position measurement (BPM) system has been designed, manufactured and tested in VEPP-5 preinjector. This system measures position of single electron and positron bunches for each injection cycle with help of stripline pickups. New BPM electronics provides more high sensitivity with respect to existing one developed in 1998. The system can measure the position of bunches with 10⁸ particles per bunch. The whole dynamic range is from 10⁸ to 5*10¹⁰ particles per bunch. The resolution of measurements of single bunch is better than 20 microns for 10¹⁰ particles per bunch. The features of system design, the main parameters and results obtained in VEPP-5 preinjector are presented.

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