Concentration of the velocity distribution of pulsed neutron beams
  The velocity of neutrons from a pulsed neutron source is well-defined as a function of their arrival time. Electromagnetic neutron accelerator/decelerator synchronized with the neutron time-of-flight is capable of selectively changing the neutron velocity and concentrating the velocity distribution. Possible enhancement of the neutron intensity at a specific neutron velocity by orders of magnitude is discussed together with an experimental design. 
Masaaki Kitaguchi, Yoshihisa Iwashita, Hirohiko M. Shimizu
physics.ins-det hep-ex nucl-ex physics.acc-ph