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impedance

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TUPSA036 Advance of the Marginal Oscillator resonance, feedback, induction, electron 122
 
  • V. G. Ryzhov
    MRTI RAS, Moscow
  The advance of the transistor marginal oscillator (TMO) circuits are considered. The various TMO circuits, the features of their functioning and the simple NMR magnetometers based on them are reviewed.  
 
THCHC05 A Family of Twenty-Amperes Power Supplies for Multipole Correctors for Accelerators and Storage Rings power-supply, controls, feedback, storage-ring 306
 
  • O. V. Belikov, V. R. Kozak, A. S. Medvedko
    BINP SB RAS, Novosibirsk
  This report presents three types of direct current supplies that have been developed at BINP SB RAS. Their maximum current values are ±20А with output voltage up to ±50V, ±100V, ±150V. The power supplies are intended for steering electromagnets of colliders and storage rings, operating as the Synchrotron Radiation sources. The power supply channel occupies a 3U subunit crate (432*355*133mm) of the "Euromechanics" standard. Specialized units are used to control and monitor the power supplies through the CAN-bus interface. The output current accuracy is of the order of 100ppm for 10 hours of operation. This report presents experimental characteristics of the power supplies.  
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THPSC001 Magnetic Coupled Disk-Loaded Waveguide coupling, simulation, electron, insertion 319
 
  • N. P. Sobenin, R. O. Bolgov, D. S. Kamenshikov, S. V. Kutsaev, A. Yu. Smirnov, S. E. Toporkov
    MEPhI, Moscow
  Funding: Research is supported by Russian President grant MK-3835.2009.2

Electrodynamic simulations results of disk loaded waweguide with magnetic field coupled cells are presentred. Different types of accelerating strructures having positive or negative dispersion were considered. Main electrodynamic parameters - shunt impedance, quality factor, group velocity etc. dependances on operation mode and aperture size are presented and discussed. High order modes issues were studied. These structures are proposed for advanced electron linear accelerators designed using conventional or hybrid schemes. Input coupler matching to this structure is studied.

 
 
THPSC017 High-voltage Source with Output Voltage up to 60kV with Output Current up to 1A controls, cathode, feedback, power-supply 357
 
  • D. V. Senkov, I. A. Gusev, A. S. Medvedko, A. Yu. Protopopov, D. N. Pureskin
    BINP SB RAS, Novosibirsk
  The presented report contains the description of high-voltage source with output voltage up to 60kV and output current up to 1A. The source consist of the chopper with IGBT switches working with a principle of pulse-width modulation and the H-bridge converter with IGBT switches, both working on programmed from 15 to 25 kHz frequency, and the high voltage sectioned transformer with the rectifier and additional capacity filter. The transformer is made in oil tank with silicon oil. The additional capacity filter provides low ripple and noise level in working range of output currents. A nominal output voltage of the source is 60kV, maximal voltage is 80kV. The source can operate in normal mode with series of high-voltage breakdown in output voltage. In the high-voltage breakdown the released in load and matching circuit energy is less than 15 J at maximum operating voltage 65kV. The efficiency of system is more than 80% at the nominally output power 60kW. The controller of the source is developed with DSP and PLM, which allows optimizing operations of the source. For control of the source serial CAN-interface is used. The description of the source and the test results are presented.