And the results are in: resonance at 2.4959 GHz with a Q of 8155. It works!Deriving the mode shape will take a bit more work.
Resolution was 100. Runtime was 1 hour. No symmetry optimization. BW was whatever was in the original NSF-1701.ctl file; I have not touched it.
Quote from: ThereIWas3 on 12/11/2015 12:01 amResolution was 100. Runtime was 1 hour. No symmetry optimization. BW was whatever was in the original NSF-1701.ctl file; I have not touched it.Oh, I see. Except that I don't know what your BW is either. Maybe you could search your control file for the parameter" BW ", that is, BW with leading and trailing spaces, and tell us what it is set to. And are you running NSF-1701 model or are you running Shell's dimensions?My Q = 20,146 at frequency = 2.46554 was Shell's model at resolution = 100 and bandwidth = 0.05 * 2.47 GHz. Drive was 2.47 GHz.
...and mankind dreamed of nearly unlimited energy:The first plasma: the Wendelstein 7-X fusion device is now in operationhttp://www.ipp.mpg.de/3984226/12_15It isn't a well tuned microwave, but what was once seriously unattainable is becoming closer to reality.Yes, I know y'all skeptics... Fusion is a long well understood science that we've not had the technology to develop and that's different than this.Mankind put in over a million hours of work on that piece of machinery to make microscopic suns that last a half an hour then die. People like to build. There's a lot of people on this forum that *really* like to build. I have an odd tickling that says that maybe what their tinkering with has the potential to be something fascinating. If you don't believe it; great. There's room for skeptics and necessary room as well. Nobody learns a thing if everybody is rah-rah'ing everything. There's more than a handful of people here who have been following this thread from Dr. Rodal's article back nearly six months ago; and who are still following it to see where this goes. This is drama at the edge of human understanding. Busted or Confirmed, the search to figure out what's going on has been a fascinating one. I wholeheartedly encourage those who are building to keep it up. Be excellent to each other.
Looking back at the number I see I misread the spreadsheet. The reported Q for Shell's model was negative 8937. Something is wrong.
Quote from: ThereIWas3 on 12/11/2015 02:54 amLooking back at the number I see I misread the spreadsheet. The reported Q for Shell's model was negative 8937. Something is wrong.A Q=0 means no energy is stored. A negative Q means energy is materializing inside the cavity. I don't believe that is possible.
Quote from: zen-in on 12/11/2015 03:07 amQuote from: ThereIWas3 on 12/11/2015 02:54 amLooking back at the number I see I misread the spreadsheet. The reported Q for Shell's model was negative 8937. Something is wrong.A Q=0 means no energy is stored. A negative Q means energy is materializing inside the cavity. I don't believe that is possible. That would be a handy explanation for the anomalous thrust and Eagleworks' interferometry research if it wasn't clearly wrong, though.
Sorry, I was not at my desk before. Here are all the parameters I used:Frustrum dimension that SeeShells told me to use: L=0.2479m Big=0.295m Small=0.170mFlat end-plates, 8/32" thick. Permittivity of Copper: -2*pi*2.4GHz*3.252698E+8iCenter frequency of the gaussian noise pulse, 2.47 GHz. BW used by the harminv search algorithm, 0.025*F
Quote from: aero on 12/11/2015 12:31 amQuote from: ThereIWas3 on 12/11/2015 12:01 amResolution was 100. Runtime was 1 hour. No symmetry optimization. BW was whatever was in the original NSF-1701.ctl file; I have not touched it.Oh, I see. Except that I don't know what your BW is either. Maybe you could search your control file for the parameter" BW ", that is, BW with leading and trailing spaces, and tell us what it is set to. And are you running NSF-1701 model or are you running Shell's dimensions?My Q = 20,146 at frequency = 2.46554 was Shell's model at resolution = 100 and bandwidth = 0.05 * 2.47 GHz. Drive was 2.47 GHz.When I run Shell's a long time ago I got quality of resonance around Q ~ 80,000 with a transverse electric mode but that was with Shell's geometry at that time, using spherical ends (at the time that I was also posting the stresses).
Quote from: RotoSequence on 12/11/2015 03:21 amQuote from: zen-in on 12/11/2015 03:07 amQuote from: ThereIWas3 on 12/11/2015 02:54 amLooking back at the number I see I misread the spreadsheet. The reported Q for Shell's model was negative 8937. Something is wrong.A Q=0 means no energy is stored. A negative Q means energy is materializing inside the cavity. I don't believe that is possible. That would be a handy explanation for the anomalous thrust and Eagleworks' interferometry research if it wasn't clearly wrong, though. It is very positive that a negative Q is immediately recognized as something wrong and not as a manifestation of negative mass, dark energy, dark masss, or something else not present in Meep's formulation.We will fix this. It is very positive that we have more people running Meep.