In the following videon Alan Smith of LookingForHeat.com demonstrates how to build a LENR reactor designed to be stimulated by a high voltage spark (400 kV) which he thinks might play a part in triggering a LENR reaction in a tube with a hydrogen atmosphere, nickel and lithium inside.
He says he is also going to add a “very turbulent” magnetic field as a means of stimulation to be used in conjunction with the spark. The experiment with a fueled reactor has not yet been carried out.
UPDATE (May 21, 2016)
LookingForHeat has added a new video about the sparker — see below: