Thanks Dennis, I will read those papers and consider your ideas and methods. Looks like some good ideas there. I have an electrochem method that is kind of expensive on the supply and control side (multiple programmable power supplies controlled by a computer - each delivering power to a single cell and constantly adjusted input power to deliver the same power levels to each cell regardless of resistance).
I'm also not just interested for my own experimentation, but feel that this is a significant area of concern that may affect the general reproducibility of the effect. In your experience, when you screen out materials that show an effect, can you reproduce the effect more often with those materials? Along similar lines, has anyone tried a large quantity of micro or nano particle nickel (e.g., 10kg in a large chamber). I realize that would probably be dangerous (and wouldn't want to try it myself), but one would think with that much material that somewhere within that massive surface area would be the right conditions. Best regards, Jack On Thu, Jun 6, 2013 at 4:25 PM, DJ Cravens <[email protected]> wrote: > For a simple electrochem sort see: > http://www.lenr-canr.org/acrobat/CravensDfactorsaff.pdf > you can tell a lot by looking at the bubble patterns. (fine good, coarse > bad). > Mike M and Fran T. were able to test loading with a wire system moving a > R tester along the wire to locate loaded areas. > > For co-deposit you can make a "cell farm" with multiple cells in the same > water bath and compare temps and get relative numbers. That is how I did > http://www.lenr-canr.org/acrobat/CravensDpracticalta.pdf > see slide 11 > > You can also plate Au onto thermistors and then co-dep and compare temps. > it works well but the cost of thermistors limits the use for the self > funded. > > Another "farm system" - is to run the cells in series (I1=I2....) and put > zeners in a tube and across the cell (to the keep the V's about equal- > zeners you will need to think about that one- the electrodes dump some heat > and the zeners dump the rest). > > I am still struggling in searches for powder based systems. Their R is > all over the map. (packing, oxidation levels, surface area.....) > > However, one way I have been experimenting with is to pack a tube with > several powders (various loading, additives.....) then passing pulsed > current through the stack. I measure the temp of the outside of the tube. > Using a Al2O3 ceramic tube. > But it relies on the R through the various powders to be nearly the same. > It is only good for large variations. > I use a "dilute stack" with most of the stack unloaded C and then adding > only a little of the (hopefully) various active materials along the tube. > > I doubt that this would be good for a spark like system, but I am doing a > straight excitation of powder via currents. > > Good luck. > > D2 > > > > > ------------------------------ > Date: Thu, 6 Jun 2013 15:35:42 -0500 > From: [email protected] > To: [email protected] > Subject: [Vo]:ideas for materials screening and LENR > > > Hi All, > > I've been considering ideas for running LENR experiments in parallel. I > know P&F and others have done some experiments like this in the past with > running multiple electrolytic cells simultaneously, so this is certainly an > option. I'm wondering if there are any other thoughts on parallel > experimental methods to screen materials. If we know that the effect > appears maybe 1/20 to 1/7 times can a pre-screening process be performed in > a relatively rapid manner to narrow down the material that works the best. > > One idea I had was to take a quartz tube (e.g., Celani/MFMP original cell > design) with a heating element and loaded with hydrogen. In the bottom of > the tube, have several types of materials (e.g., different nickel powder > mixtures/sizes etc..) discretely separated and monitored with an IR camera > similar to the setup for the E-cat test. The image could be monitored to > determine which samples give off the most heat. > > Since the reproducibility problem is in part a materials problem, then it > makes sense to me to develop a screening method to more quickly find > samples that work and discard those that don't. A process using a method > to simultaneously screen many samples would seem to be the most efficient > way to empirically screen materials. > > NASA's chip array design would have some promise in this area, but would > seem less practical, more expensive, and limited compared to other > possibilities (e.g., IR camera). > > Any thoughts on this matter or other ideas on efficient materials > screening processes? > > Best regards, > Jack >
