 Initial difficulties in spherical electron confinement led to the 2005 research project's termination.However, Bussard reported a fusion rate of 109 per second running D-D fusion reactions at only 12.5 kV (based on detecting nine neutrons in five tests, giving a wide confidence interval).He stated that the fusion rate achieved by WB-6 was roughly 100,000 times greater than what Farnsworth achieved at similar well depth and drive conditions.