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TUPSA032 The TNK Beam Position Monitor System single-bunch, storage-ring, pick-up, feedback 110
 
  • E. A. Bekhtenev, G. V. Karpov, E. Shubin
    BINP SB RAS, Novosibirsk
  New second generation synchrotron radiation source TNK is being built in Zelenograd, Russia. The new FPGA-based beam position monitor (BPM) system for TNK has been developed and produced in BINP. The BPM system requirements for second generation light sources are not as severe as for the third generation light sources. Nevertheless the system is able to perform turn-by-turn measurements and has micron level accuracy. The TNK light source is intended for work both in multiple and in single bunch mode. In the second case the charge of one bunch can achieve the value of 60 nK result in high peak voltages at BPM electrodes. Design features of the BPM system, its parameters and testing results are presented in this paper.  
 
THPSC001 Magnetic Coupled Disk-Loaded Waveguide impedance, coupling, simulation, electron 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.

 
 
THPSC005 Materials for Fast Cycling Accelerator Superconducting Magnets dipole, quadrupole, vacuum, superconducting-magnet 331
 
  • P. A. Shcherbakov, I. Bogdanov, S. Kozub, L. S. Shirshov, I. Slabodchikov, V. Sytnik, L. Tkachenko, V. Zubko
    IHEP Protvino, Protvino, Moscow Region
  Funding: Rosatom, contract Í.4å.45.03.10.1027

Development of fast-cycling superconducting magnets with high field amplitudes and ramp rate makes severe requirements especially to material properties in order to improve field quality and to reduce AC losses. Analysis of experimental and literature data is fulfilled for magnetic characteristics of electric steels at different temperatures. Susceptibilities of stainless steels of different grades are examined as well as a tolerance on the value of the magnetic permeability. Mechanical, thermophysical and technological properties at room and cryogenic temperatures are presented. Comparison of steel characteristics, selected for the SIS300 quadrupole prototype, with the steels, used in the SIS300 dipole and steels, applied in the SIS100 prototype magnets is carried out. General advices to the choice of materials for electrical and stainless steels, used in a design of fast-cycling magnets, are given.