Peter Gear Bio. Peter Gear has worked on ISIS from its beginning in 1978. Initially responsible for developing the H-minus ion source, he subsequently became involved in the commissioning of the pre-injector, 70-MeV linac and 800-MeV synchrotron, as their build progressed, so developing considerable in-depth knowledge and skills associated with their operation. He became an ISIS Duty officer (shift leader) in 1986 and Head, ISIS Operations and Installation Group in 1991.