Spectrometer for Ion Determination in Fission Research (SPIDER)
The Spectrometer for Ion Determination in Fission Research (SPIDER) is an instrument created to measure fission mass yield. The instrument has a 2-5% accuracy rate for neutrons ranging from 0.01 eV to 20MeV. The mass is determined as a function of a fission products’ time of flight, energy, and path length.

The SPIDER spectrometer.

Schematic of the next generation, full-scale SPIDER spectrometer.
(Los Alamos National Laboratory LA-UR-13-23697)
(Los Alamos National Laboratory LA-UR-13-23697)
Further Information
Meierbachtol, et al. "The SPIDER Fission Fragment Spectrometer for Fission Product Yield Measurements." ScienceDirect. Nuclear Instruments and Methods in Physics, July 2015.The Pulse AOT & LANSCE February 2014 Issue
A New Capability for Fission Fragment Spectroscopy at LANSCE
The Pulse AOT & LANSCE Focus Issue
"First Results of Fission Mass Yield Measurements with SPIDER at LANSCE", FIESTA Workshop. 2014.
Target 1 Flight Path 12 - Scientific Applications