CHARISSA (derived from 'CHARged particle Instrumentation for a Solid State Array') is a nuclear structure research collaboration originally conceived, initiated and partially built by Dr. William Rae of the University of Oxford (retired) and now run by the School of Physics and Astronomy at the University of Birmingham, UK. The other members of the collaboration are the University of Surrey with occasional contributions from LPC CAEN and Ruđer Bošković Institute, Zagreb. The collaboration is funded by the Science and Technology Facilities Council (STFC).