At ICCF-12, Arata described a gas-loaded version of his double
structured cathode. His lecture slides and some text are available here:
http://lenr-canr.org/acrobat/ArataYdevelopmenb.pdf
It may be a little unclear from this text, but this implementation of
the double structured cathode appears to be much more practical than
the liquid electrolyte version, and it produces high power density.
The device he described at ICCF-12 have about 1 cc of palladium
black. He is now having a corporation fabricate any new, larger
version which will have about 100 cc of palladium black. It should be
ready in a few months.
- Jed