A Fast Neutron-Gamma Detector for Space Research

The unique features of this instrument are the following: 1. The charged particle shield (NE 102) uses only two P. M. tubes. 2. The 4¿ charged particle shield encloses completely the neutron-gamma detector, all P. M. tubes and associated sensor electronics. 3. The pulse shape discriminator (P. S. D.) is passive and miniature, with "M" > 3.1 at the Co60 Compton edge. 4. The separate spectra of neutrons (1 < En < 20 Mev) and gammas (1 < E¿ < 7 Mev) are extracted. 5. The I. F. C. (4% resolution) with P. S. D. on NaI(Tl & Am241) is also displayed with (4). 6. The quality of data is checked by parity bits, and data are transmitted by a parallel, redundant FM-FM TM system.