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%.