Injection in the storage ring vepp-2000

In the spring of 1999 the decision was taken on the modernization of the VEPP-2M complex to increase the luminosity and the maximum achievable energy of up to 2 GeV. This will to essentially improve the experiments on the collider. The new project was named VEPP-2000. Engineering aspects of injection at VEPP-2000 are considered in this report. The energy of injection is 900 MeV. The scheme of injection with a prekick of a stored beam is used. As the collider has got one ring, both the electron and the positron beams co-exist and simultaneously move in counter directions. The kickers operate in a traveling wave mode and affect the counter moving particles only. Every kicker has one asymmetrical 50-Ohm strip lines with a unipolar feed. The geometrical aperture of the vacuum chamber is 34 x 70 sq. mm. The plates of the kickers are located inside the bending magnets and are 136 cm long. Such tiny sizes of the chamber cause additional difficulties with ensuring both the placement and the electric strength of the plates in the chamber. The present report describes the feed circuit of the kickers. The generators form pulses in the traveling wave mode with an amplitude of up to 60 kV, 80 ns pulse duration (Full width half maximum (FWHM)) and 60 ns raise/fall time at a repetition rate of up to 1 Hz. The circuit is constructed on the basis of a step artificial line with a pulse hydrogen thyratron as the switchboard.