Special problems in nuclear instrumentation. Progress report, September 1, 1976--November 30, 1977

Three research programs are briefly outlined. The extraneous charge movements in coaxial and triaxial cables which are used to carry currents generated in ionization chambers have been the subject of further studies. Also, information pertaining to the preparation and properties of various conducting solid mixtures which have been developed in the Physical Sciences Laboratory is being collected and organized for a special report covering this subject. A new mixture which simulates cortical bone has been prepared and partially evaluated. The standard formulation, A-150, which was introduced as an equivalent for muscle relative to photons and neutrons has been duplicated successfully. Also, fundamental dosimetry studies of the high energy neutron therapy beam at Fermi National Accelerator Laboratory have been initiated