J. Calero et al., EXPERIMENTAL TEMPERATURE-MEASUREMENTS FOR THE ENERGY AMPLIFIER TEST, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 376(1), 1996, pp. 89-103
A uranium thermometer has been designed and built in order to make loc
al power measurements in the First Energy Amplifier Test (FEAT). Due t
o the experimental conditions power measurements of tens to hundreds o
f nW were required, implying a sensitivity in the temperature change m
easurements of the order of 1 mK. A uranium thermometer accurate enoug
h to match that sensitivity has been built. The thermometer is able to
determine the absolute energetic gain obtained in a tiny subcritical
uranium assembly exposed to a proton beam of kinetic energies between
600 MeV and 2.75 GeV. In addition, the thermometer measurements have p
rovided information about the spatial power distribution and the shape
of the neutron spallation cascade.