Photos and Annotations from Akito Takahashi taken at the Arata Cold fusion demonstration.
Yoshiaki Arata, a retired (now emeritus) physics professor at Osaka University, Japan, together with his co-researcher Yue-Chang Zhang, uses pressure to force deuterium (D) gas into an evacuated cell containing a sample of palladium dispersed in zirconium oxide (ZrO2–Pd). He claims the deuterium is absorbed by the sample in large amounts — producing what he calls dense or "pynco" deuterium — so that the deuterium nuclei become close enough together to fuse. Arata experiment has not been reproduced yet, but some observers believe that it seems reproducible.
After Arata had started the injection of gas, the temperature rose to about 70 °C, which according to Arata was due to both chemical and nuclear reactions. When the gas was shut off, the temperature in the centre of the cell remained significantly warmer than the cell wall for 50 hours. This, according to Arata, was due solely to nuclear fusion.
Rothwell also pointed out that Arata performed three other control experiments: hydrogen with the ZrO2–Pd sample (no lasting heat); deuterium with no ZrO2–Pd sample (no heating at all); and hydrogen with no ZrO2–Pd sample (again, no heating). Nevertheless, Rothwell added that Arata neglected to mention certain details, such as the method of calibration.
UPDATE: Follow up analysis on the amount of excess heat over time that was found
COLD FUSION UPDATE Blacklight power (a hydronos - new chemistry/physics company but one not connected to Dr Arata) claims to have a 50 KW prototype ready, which they are building factories for and expect to start deliverying and selling in 12-18 months
A twenty page description of the Arata work from 2003.
Pyncohydrogen (concentrated hydrogen described) from the Arata research paper
Paladium particle size is important
How the metallic lattice forces the gas molecules close together
The principle of the Arata reactor
1) Pycnohydrogen (ultrahigh density of hydrogen-lumps) never causes the nuclear fusion reaction.
2) Bulk metal never causes Pycnodeuterium, hence never causes the fusion reaction.
3) If materials easily form solid Pycnodeuterium, then they can cause strong solid nuclear fusion.
4) Solid Pycnodeuterium is by far the most excellent fuel for nuclear fusion, as compared with gaseous deuterium as used in thermonuclear fusion. Thermonuclear fusion requires an ultra high temperature plasma. Because a high temperature plasma requires high temperature, low density electrons, there is an excessively large Debye-shielding length and no neutralizing zone. The D-ion space charge becomes too large, just as in the vacuum state.
New Energy Times article from May 22, 2008
Photos taken at the demonstration Photos and Annotations from Akito Takahashi.
In other hot fusion news: Focus fusion has received $10 million in funding from Sweden.