The 40 kA dumping system for the ISR beams

It has been necessary to build a fast and reliable system which can dump the beam whenever safety monitors indicate a hardware fault or a beam loss. The beam in each ISR is dumped by means of four fast pulsed magnets deflecting the particles vertically onto an absorber block situated in the same long straight section. The 0.75 Omega , 40 kA pulse generator now energizing the four fast pulsed magnets is described with special attention to the principles and technological solutions which were adopted in order to achieve the necessary reliability of the system for each type of operation, and particularly during long colliding beam experiments. (7 refs).