2009/10/30 Jed Rothwell <[email protected]>: > Abd ul-Rahman Lomax wrote: >> Or to tape LR-115 detectors (or CR-39) on the outside of the cell. > > For some reason they find it necessary to put the CR-39 as close to the > cathode as possible.
It can be both outside of the cell and as close to the cathode as possible (6 microns of mylar from it), that's what SPAWAR did in their 2009 paper http://www.lenr-canr.org/acrobat/MosierBosscharacteri.pdf we have been discussing, see their fig.1. BTW Abd, I said I liked your idea of putting the Mylar film on the inside of the windowed cell wall, but I just found there is a compelling advantage in putting it flat on the outside like SPAWAR did: it allows to apply any detector or instrument, whatever its shape and size, flat against the Mylar.(*) Plus, the outside arrangement sets a precise distance between the cathode wire support and the mylar: the thickness of the cell wall. This makes it easier IMHO to control the contact between the Mylar and the cathode wires, by pre-bending the latter to make them bulge away from their support in a controlled way, slightly farther than the wall thickness. Michel (*) This advantage was pointed out by Ludwik Kowalski in a months old CMNS post I only just read (I know he won't mind me reporting this here without permission, he is a very nice guy, BTW do contact him directly I am sure he will be sympathetic and helpful ; before that, you may want to read through his unit 369 which is extremely complete on the subject of CR-39 experiments: http://pages.csam.montclair.edu/~kowalski/cf/369oriani.html )
