Abstract: A method includes operating a wellsite apparatus at a wellsite utilizing mechanical energy or electricity produced at least in part from hydrogen in a fuel source comprising hydrogen. Utilizing mechanical energy or electricity produced at least in part from the hydrogen in the fuel source comprising hydrogen can further include: (a) converting the hydrogen in the fuel source to electricity in one or more fuel cells and utilizing the electricity to operate the wellsite apparatus; and/or (b) combusting the hydrogen in the fuel source in a power generation apparatus to produce electricity and utilizing the electricity to operate the wellsite apparatus; and/or (c) combusting the hydrogen in the fuel source to produce mechanical energy and utilizing the mechanical energy to operate the wellsite apparatus. A system for carrying out the method is also provided.

Abstract: Systems, processes, and apparatus are described through which fast neutrons are detected, their momenta are measured and a position of a source of the fast neutrons is determined from the measured momenta. For example, a multiple-cell neutron-sensitive camera is described. Each cell includes a neutron detection cell that also functions as a time expansion chamber and a micro-well detector coupled to the time expansion chamber.