Fusion Message Board

In this space, visitors are invited to post any comments, questions, or skeptical observations about Philo T. Farnsworth's contributions to the field of Nuclear Fusion research.

Subject: Re: Neutron detection, 5
Poster: Richard Hull

On , Richard Hull wrote:

>Just a thought.. The cost difference between a 2" disk of BC720 and a 5" disk isn't all that great (about 30-40% more) and the nominal detection area is more than 6 times bigger. What if you were to optically couple the output of the big scintillator to the small tube?

It is better to get the 5" PMT for the 5" scintillator. I got one at a hamfest two years ago in box, new. It was another Hamamatsu and has the require S-11 response. I think I paid about $30.00 for it. I have no socket and am looking at about $36.00 for that puppy! More than the tube! Sigh.

I have the 5" BC-720 and now only have to work up the housing.

Richard Hull