High Radiation Tolerant, High Yield, Silicon Detector Designs for Large Volume Trackers at the Super- LHC

Detectors needed by particle physics experiments have to withstand huge radiation doses and work for many years. As accelerators become able to reach higher energies and create more and more collisions per second, the requirements for detectors to survive inside the experiments becomes highly challenging. At the moment, the best option for high speed, radiation hard position sensitive detectors is to use segmented silicon. For the volume of the experiment where charged tracks need to be reconstructed as they bend in a high magnetic field, large areas of detectors measuring the particle trajectories to hundredth of a millimeter precision are needed. While we know how to do this with silicon and the LHC experiments ATLAS and CMS have silicon trackers of 60m2 and 200m2 area respectively, we do not know how to build arrays of these areas suitable for ten times the expected dose at the LHC. This is exactly the requirement of the Super-LHC which will operate with an average collision rate ten times that of the LHC. The proposal is a novel approach to building detectors affordably that can meet these demands. it builds on experience at Liverpool in making smaller detector systems able to cope with these very high doses and proposes to explore processing tricks developed for other radiation environments by e2v to come up with a robust method for making the large quantitities of silicon microstrip detectors required for the SLHC.