The ITEP-TWAC injection and extraction kicker

The system multi-turn injection and fast extraction for installation in ITEP-TWAC is developed in MRTI RAS. In this paper one kicker in the injection ring and one extraction kicker in the storage ring are described. In both kickers, the rise time of the magnetic field is not more 300 ns, and plateau duration 300-500 ns. The total length of the injection kicker is 1.8 m, aperture is 0.1×0.1 m and kicker strength is 0.16 T·m. The total length of the extraction kicker is 1.5 m, aperture is 0.09×0.09 m and kicker strength is 0.14 T·m. Both kickers are situated outside the vacuum chamber and consisted of a number of uniform sections 0.3 m in length. In each section, a ferrite magnet, pulse former line, matched resistor 2.5 Ohm and 50 kV ceramic metal thyratron with grounded grid are used. Pulse current in each magnet achieves 7-8 kA in order that the magnetic field is not more than 0.1 T. In each former line concentration capacitors and inductors are used in order to store energy and pulse correction is used. The compact pulse power supply system in each section gives the possibility of connection with magnet short feed buses without a low-impedance 2.5 Ohm cable