Speaker
Description
Safely extracting and absorbing the 50 TeV proton beams of the FCC-hh collider will be a major challenge. In the new baseline concept one straight section of 2.8 km length is dedicated to the beam dumping system. The beam dumping system will fast-extract the beam and transport it to an external absorber. The high stored beam energy of about 8.5 GJ per beam means that machine protection considerations will severely constrain the functional design and specifications of the straight section and the beam dump line geometry.
The overall system concept is presented and evaluated regarding overall system length, energy deposition on absorbers, hardware requirements, radiation issues and layout flexibility. It is proposed to use of a highly segmented extraction kicker system allowing a single kicker switch to fail, this will significantly reduce the probability of an asynchronous beam dump. In order to sufficiently separate swept single bunches on the extraction absorbers in case of an asynchronous beam dump a fast field rise of the extraction kicker is required. Superconducting septa are foreseen to limit the overall system length and power consumption. Detailed studies to ease the challenging dilution kicker system were performed and will be presented.
