Physical and Mathematical Description of Nuclear Weapons Identification System (NWIS) Signatures

Technical Report · Fri Sep 26 00:00:00 EDT 1997

DOI:https://doi.org/10.2172/1878· OSTI ID:1878

Mattingly, J K; Mihalczo, J T; Mullens, J A; Valentine, T E

This report describes all time and frequency analysis parameters measured with the new Nuclear Weapons Identification System (NWIS) processor with three input channels: (1) the 252Cf source ionization chamber (2) a detection channel; and (3) a second detection channel for active measurements. An intuitive and physical description of the various functions is given as well as a brief mathematical description and a brief description of how the data are acquired. If the fill five channel capability is used, the number of functions increases in number but not in type. The parameters provided by this new NWIS processor can be divided into two general classes: time analysis signatures including multiplicities and frequency analysis signatures. Data from measurements with an 18.75 kg highly enriched uranium (93.2 wt 0/0, 235U) metai casting for storage are presented to illustrate the various time and frequency analysis parameters.

• Research Organization: Oak Ridge Y-12 Plant, Oak Ridge, TN
• Sponsoring Organization: USDOE Office of Defense Programs (DP)
• OSTI ID: 1878
• Report Number(s): Y/LB-15,946 R3; ON: DE00001878
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
Nuclear Weapons
Radiation Detectors
Neutrons