I must've missed a few classes; are you talking about creating or removing heat in a general sense, starting an atomic nuclear reaction, or simply producing energy? I joined the group last night and, obviously, missed a few emails, too. Just curious.Bob Lee
Sent from Yahoo Mail on Android On Thu, Oct 15, 2020 at 12:56 PM, Bob Higgins<rj.bob.higg...@gmail.com> wrote: The nonlinearity must be attached to the cathode itself because a THz signal will not go through even 1 micron of electrolyte. In the Letts-Cravens-Hagelstein experiment, a tiny amount of gold was added to the cathode to produce the nonlinearity. Did it work because it formed a diode junction? Was the nonlinearity plasmon related? That is presently unknown - but it was produced directly on the cathode, which is the target. On Thu, Oct 15, 2020 at 1:50 PM Sean Logan <paco66...@gmail.com> wrote: Sounds fascinating. May I ask: what are you using as your non-linear element, to cause the two laser beams to heterodyne? Is it the target they shine on, itself? On Wed, Oct 14, 2020, 15:19 Bob Higgins <rj.bob.higg...@gmail.com> wrote: Sean, What you are describing is entirely possible. Also, diode lasers can be driven into modes that produce sidebands just at the threshold of ordinary output - but it is hard to control the sidebands without an expensive "loop" receiver and some kind of lock-in control. Using 2 lasers is pretty easy. I am presently working on a dual laser experiment with 2 tunable diode lasers combined optically onto a single fiber. The wavelength separation (determines the beat frequency) is continuously monitored in a high resolution fiber spectrometer. We are nearly ready to run experiments with this hardware. On Wed, Oct 14, 2020 at 2:10 PM Sean Logan <paco66...@gmail.com> wrote: Could you use an Optical Parametric Amplifier to create your desired sidebands? Using one laser as the "signal input" and the other as the "pump" should give you an output containing sum and difference frequencies (sidebands, or heterodynes). On Wed, Oct 14, 2020, 12:29 H LV <hveeder...@gmail.com> wrote: In my estimation Rumford's theory is the seed of an alternate theory of radiation. It could still grow and blossom into a well developed mathematical theory of heat. I am interested in beat theory because it resonants (pun intended) with Rumford`s theory of hot and cold radiation, sinceboth involve _differences_. A beat frequency is given by the difference of two frequencies and in Rumford`s theory two types of differences are important.The first is that the relative difference in temperature between two bodies determines which body is producing more hot or more cold radiation. The second is that the sign and magnitude of the difference between the received frequency and the oscillator's frequency determines whether the radiation increases or decreases the energy of the oscillator. Harry On Tue, Oct 13, 2020 at 3:21 PM JonesBeene <jone...@pacbell.net> wrote: The beat frequency they were after was in the THz range and this was in order to fit Hagelstein’s theory of optical phonons – … and yes - small gain was seen. However, in the earlier similar work without beat frequencies – single laser only - much higher gain (order of magnitude more) has been reported by Letts/Cravens. The reproducibility was apparently better in the later experiments - but I do not think the lower result with the beat frequency is leading anywhere. From: H LV Beat frequencies of two lasers irradiating a surface appear in _Stimulation of Optical Phonons in Deuterated Palladium_ by Dennis Letts and Peter Hagelstein https://www.lenr-canr.org/acrobat/LettsDstimulatio.pdf Harry
