Design procedure of an active bouncer for an ultra precise long pulse solid state modulator

Long pulse modulator systems like the electron-positron compact linear collider (CLIC) with a pulse length of 140μs require a bouncer for voltage drop compensation. In this paper, an active bouncer system, consisting of four bouncer modules, in series to the main capacitor bank, is investigated. The system's transfer function including the matrix pulse transformer is analysed and the output voltage ripple induced by the bouncer system is designed to be smaller than 5 ppm due to demanding repeatability requirement of CLIC. Based on a loss analysis is conducted resulting in a total bouncer system volume of 52dm³ and a reduction in the global efficiency (grid to klystron) of the modulator system of only 0.45%.