NEW NWIS PROCESSOR FOR FISSILE SYSTEM VERIFICA nON

Year
1997
Author(s)
T.E. Valentine - Oak Ridge National Laboratory
J.A. Mullens - Oak Ridge National Laboratory
J.T. Mihalczo - Oak Ridge National Laboratory
J.E. Breeding - Oak Ridge National Laboratory
G.W. Turner - Oak Ridge National Laboratory
J.A. McEvers - Oak Ridge National Laboratory
M.C. Smith - Oak Ridge National Laboratory
Thomas Gafford - Oak Ridge National Laboratory
Abstract
This processor, which is the basis of the Nuclear Weapons Identification System (NWIS), is a five input channel system capable of sampling signals synchronously in all five channels at sampling up to and including 1 GHz. For source correlation measurements with 252Cf in an ionization chamber, this system would be configured with the source ionization chamber as channel 1 and up to four detection channels. This processor operation will be demonstrated with the latest hardware and software. This system provides a wide variety of signatures (19 with a source and two detectors) that are obtained by time and frequency analysis processing of the signals including multiplicities from which the Feynman variance can be obtained. For five channel operation the number of signatures is extensive and live time processing is not now practical. The cart portable system hardware will be demonstrated and schematics of the Laptop Portable System will be displayed.