Rod Weatherbie and Lidia Shaw join your intrepid host Dave Noel in a news discussion from their homeland of PEI. Summed up… Cell phone towers don’t cause cancer! Scoffing in the face of popular island opinion, we explore the science that backs our audacious claim.

Show Notes:

Findings from a long-term Danish study found in the Journal of the National Cancer Institute.
Conclusions: The results of this investigation, the first nationwide cancer incidence study of cellular phone users, do not support the hypothesis of an association between use of these telephones and tumors of the brain or salivary gland, leukemia, or other cancers.

Resembling a palates ball with robotic spider legs, partially encased in concrete at the center of this huge facility, the reaction chamber is a rather intimidating looking blue sphere surrounded by portholes, and large long rectangular boxes all converging into a single point somewhere deep within the bowels of this megalithic construction. It’s hard to believe that all of this is needed to convert a 2 millimeter sphere of beryllium and deuterium into helium and a butt-load of energy.

Sleeping in the giant belly of the Lawrence Livermore’s National Ignition Facility, is the world’s first over unity nuclear fusion laser reactor (ignition scheduled for 2010). It’s expected that the overall energy output from this reactor will be anywhere between 100 to 1000 times the energy that was needed to start the initial fusion reaction. That would be equivalent to the entire electrical output of the United States power grid combined, for a billionth of a second.

A brief history of laser fusion:

This monumental effort represents the 4th attempt to achieve a fusion reaction at the facility over the past 35 years. The first was codenamed “Janus” in 1974. With an output of only 10 joules and built to study inertial confinement fusion it was considered to be a very high power laser. Utilizing almost 100 pounds of Neodymium² glass laser material, and filling a medium sized room, the dual infrared laser didn’t have enough power to create a fusion reaction.

Although fusion was not achieved in the Janus experiment, some serious number crunching led to the second attempt at laser fusion in 1977 codenamed “Shiva”. Named after the multi-armed Hindu goddess of destruction, this laser system, at the time, certainly lived up to it’s name. Utilizing 20 infrared lasers, this system was capable of generating 10.2 KiloJoules of energy (over 1000 times the energy of it’s predecessor). Fusion was not expected in this facility, it was built primarily as a proof of concept for a larger facility that was to follow.

In 1984 “Nova” came online with the expressed purpose of becoming the first fusion ignition system. With 20 beamlines and an output of 30 KiloJoules this system should have had the power to spark a fusion reaction. Ultimately it failed due to unforeseen magnetohydrodynamic instability, and minute inconsistencies in the laser outputs causing the fuel pellet to heat and implode unevenly. Although fusion was not achieved, the data collected during it’s operation between 1984 and 1999, proved to be both valuable and vital in the fields of high-density matter physics and nuclear weapons research.

After some major plans to upgrade the Nova systems, they were eventually rented to France and replaced by the “National Ignition Facility”. Now taking up the full space of both the Janus and Nova facilities, and incorporating 192 ultraviolet lasers and over 3,000 plates of Neodymium doped laser glass, this latest incarnation puts out an incredible 1.8 Million joules of energy making it almost 200, 000 times more powerful than the Janus experiment.

Now that’s one a-spicy meat-a-ball!

Footnotes:

¹In chemistry and manufacturing, electrolysis is a method of separating chemically bonded elements and compounds by passing an electric current through them. One important use of electrolysis of water is to produce hydrogen.

²Neodymium is also known as a “rare earth metal”, and has a wide array of uses from high power laser glass doping to super strong permanent magnets.

http://www.wired.com/science/discoveries/news/2009/05/gallery_nif

Sandia’ Z machine lab melts diamonds at 10 million atmospheres

Heavy super-dense deuterium atoms are the nuclear fuel of the future

Geothermal power is extracted from the heat stored in the earth from it’s original formation. It can also be seen on the surface in the form of hot springs. This very old technology is now more than ever being looked at as a means to usher in the inevitable end of oil. The number of new geothermal projects in the United States alone has risen 25 percent since last August.

That number sounds very impressive, but geothermal still only counts for a very small percentage of the world’s energy output. 35% of it is from the United States but it only counts for less than 1% of their total energy.

So why the sudden interest? Well as I mentioned the worlds oil supply continues to deplete. We have reached peak oil (according to some) and deposits for this traditional power source will be more and more difficult to find. Another reason is the advancement in the technology. It used to be that in order for geothermal power to be of any major use, you’d have to live near one of Earth’s major fault lines to acquire the heat in a natural convective method. Enhanced Geothermal Systems do this through hydraulic stimulation. When natural cracks and pores will not allow for flow rates, the permeability can be enhanced by pumping high pressure cold water down an injection well into the rock. The injection increases the fluid pressure in the naturally fractured granite which mobilizes shear events, enhancing the permeability of the fracture system. Water travels through fractures in the rock, capturing the heat of the rock until it is forced out of a second borehole as very hot water, which is converted into electricity using either a steam turbine or a binary power plant system. All of the water, now cooled, is injected back into the ground to heat up again in a closed loop. These technologies are impressive enough to garner the attention of internet giant Google. In 2008 they invested 10 million dollars to further research this potential source.

That being said there are still plenty of untapped traditional geothermal sources and may be the safer bet in such a shaky economy. So far, it’s one of the only commercially proven renewable power source that can deliver baseload power ( minimum demands based on customer requirements )

To give you one example of how geothermal power can help. A company called Ormat, located in Reno, Nevada produces enough geothermal power to run that city. When you think of the electricity used to charge the entertainment landscape of Reno, it makes you wonder why we aren’t investing more heavily into this natural and renewable power source.