Fusion Energy: The Big and the Small

The general principle behind fusion is relatively simple. If you can fuse together lightweight atoms, you can create a heavier atom plus lots of energy. The trick becomes that in order for the atoms to fuse together, enough energy needs to be provided to heat atoms into the range of 150 million degrees (Celsius). _Thomasnet

Los Alamos National Lab
The current approaches to large scale fusion power have not been successful. Neither the large tokamak approach -- magnetically confined plasmas -- nor the laser inertial confinement approach as practised by Lawrence Livermore Lab, have provided significant returns for all the money that has been spent on them.

That is why the Los Alamos National Labs are trying a different approach, magnetised target fusion:

“We built a plasma injector, and they built a can-crusher, and you put the plasma into that aluminum canister, and then you crush the aluminum can, with the huge current produced by the capacitor bank,” Wurden began.

“”You put 11 million amps of current, and that produces a big magnetic field on the outside; that crushes the can very smoothly and uniformly.

“We put a magnetic field inside the can, we then inject the plasma from the magnetic field into the can; if the plasma’s in there and you do it right; we crush it by a factor of 10.”

Wurden then explained how the process works further.

“If you take a can from 10 centimeters in diameter to 1 centimeter of diameter; when you change the area by a factor of 100, the magnetic field in the can gets 100 times stronger than it was. This gives you a magnetic field of 5 million Gauss; and we have that plasma supported by this incredibly large magnetic field.

“We can hold the plasma together for 1/millionth of a second, at this incredible density and incredible temperature; we take the energy of motion in the can.
We’ve merged the technology of crushing a can, fast and smooth, with the plasma injector we have.”

Wurden, who has been working on fusion since 1977, said that the Magnetized Target Fusion approach is something in between the strictly magnetic fields approach, and the inertial compression approach used at the Livermore Lab in California. _Thomasnet

More from Los Alamos Labs:

MTF is intermediate between magnetic confinement and inertial confinement fusion (ICF) in time and density scales. In contrast to direct, hydrodynamic compression of initially ambient-temperature fuel (e.g., ICF), MTF involves two steps: (1) formation of a warm (e.g., 100 eV), magnetized (e.g., 100 kG), wall-confined "target" plasma prior to implosion; (2) subsequent quasi-adiabatic compression by an imploding pusher, such as a magnetically driven imploding liner. In many ways, MTF can be considered a marriage between the traditional magnetic and inertial confinement approaches, which potentially eliminates some of the pitfalls of either. In particular, MTF requires simpler, smaller, and considerably less expensive systems than either magnetic confinement or inertial confinement ("laser") fusion. The instabilities which plague traditional approaches to fusion are potentially mitigated in MTF due to wall confinement, shockless acceleration and relatively low velocity (e.g 1 cm/m sec) of the pusher, and low required convergence ratios (e.g., 10:1). Similar to inertial confinement fusion (ICF), MTF relies on an implosion to compress a DT fuel to ignition conditions. Yet, also similar to magnetic fusion energy (MFE), MTF relies on a magnetic field to reduce the thermal diffusion of energy to the walls of a chamber. _LANL MTF

The LANL article goes on to describe the benefits obtained from their "hybrid" approach to fusion. But even with all the benefits of MTF, the researchers do not actually expect to achieve reliable fusion for at least 50 years.

That is where small fusion approaches come in: By trying so many different things, there is always the chance that one of the small fusion startups might create a winning technology. Here is a picture gallery of small fusion startups, borrowed from Al Fin Energy blog:

Bussard IEC Fusion
Bussard inertial electrostatic confinement fusion (EMC2 Fusion) involves an electrostatic plasma confinement to achieve fusion. The history and development of the concept is explained in a video reached via the link above. The Bussard IEC has been financed almost entirely by the US Navy. EMC2 is based near Santa Fe, New Mexico.

Dense Plasma Focus Fusion
Lawrenceville Plasma Physics is based in New Jersey. The dense plasma focus approach uses a special pulsing "spark plug" to ionise a gas, and to form a plasmoid "pinch," with the emission of high energy photons, ions, and fusion neutrons.

HyperV
Hyper V Technologies utilises a spherical array of mini railguns to accelerate plasma beams into a central target of deuterium or deuterium-tritium, to achieve fusion (hopefully).

TriAlpha
TriAlpha is an Irvine, California venture, which has been fairly successful in the venture capital game. TriAlpha is a bit secretive with non-investors, but you can read their patent for yourselves. The concept seems to involve the highly sophisticated evolution from an earlier colliding beam fusion approach.

General Fusion
General Fusion is a small startup headquartered near Vancouver, BC. The compression of plasma to achieve fusion is accomplished by a coordinated spherical plasma compression, using pneumatics and advanced switching.

Helion
Helion Energy is located in Redmond, Washington. It is based on a principle of "colliding plasmas," and like all the rest of the small fusion approaches, it is a long shot.

News From the World of Nuclear Fusion

A major upgrade to the DIII-D tokamak fusion reactor operated by General Atomics in San Diego will enable it to develop fusion plasmas that can burn indefinitely. Researchers installed a movable, 30-ton particle-beam heating system that drives electric current over a broad cross section of the magnetically confined plasma inside the reactor's vacuum vessel. Precise aiming of this beamline allows scientists to vary the spatial distribution of the plasma current to maintain optimal conditions for sustaining the high temperature plasmas needed for fusion energy production. _Eurekalert

Image Credit
Physicists in San Diego have removed a stumbling block to sustained plasma fusion in tokamak reactors. This development should allow plasma fusion specialists to move ahead in their quest for essentially infinite energy.

The so-called "H-mode" where turbulence ceases and a tokamak becomes much more efficient was discovered as long ago as the 1980s, but working out how to make it happen - and keep happening, sometimes a tokamak will flick in and out of H-mode hundreds of times a second - has been difficult.

... The problem was that, until work began in San Diego, nobody really understood how and when turbulence ceased as surface flow built up. But Dr Lothar Schmitz and his crew are pleased to report that their method of using microwave radar guns - not dissimilar to police speed guns aimed into the torus using focusing mirrors - has given them a good handle on what's going on.

"We found that the turbulent eddies on the surface of the plasma produced surface flows that eventually grow large enough to shred the eddies, turning off the turbulence," says Schmitz. "Much like the population of predators and prey find a balance in the wild, we find that the plasma flow and the plasma turbulence reach an equilibrium in the tokamak plasma." _Register

Alan Boyle provides a nice overview on the state of the art of various approaches to fusion, including laser ignition, magnetic confinement, and assorted other types

Brian Westenhaus looks at news from the Bussard IEC fusion front

Gamma ray laser fusion technology has even been novelised recently by a Los Alamos scientist

Ecatnews.net covers the unpredicatble developments in "cold fusion" or LENR -- low energy nuclear reactions

And Brian Wang's Nextbigfuture provides nice overall coverage of most large energy topics

The field of fusion is long past due for significant breakthroughs. When they begin coming, they may arrive too quickly to assimilate at once.

Billionaires Who Are Pushing the Future Forward

"I've been rich and I've been poor, and rich is better."

hplus
Opportunity societies such as the US once was, allowed large numbers of relatively young (mainly) men to achieve great wealth. Some of these young and young-at-heart men are devoting a considerable amount of their wealth to drive future-oriented enterprises such as access to outer space, advanced nuclear fission and fusion, and more. Peter Thiel, for example, is backing life extension, seasteads, and a number of other futuristic game changing technologies.

Jeff Bezos of Amazon.com has backed space launch company Blue Origin for years, and is now backing unconventional nuclear fusion startup General Fusion. Bill Gates' investment in Terrapower advanced fission reactors appears to reflect a deep commitment to advanced abundant energy.

A fair number of these billionare drivers of the future were also school dropouts. Perhaps there is something about having succeeded without receiving the official seal of approval from the educational establishment, which gives a person the courage to push ahead -- risking part of a huge fortune on ideas that are ever further out.

Billionaire Elon Musk's SpaceX is the frontrunner in the private space launch race, having successfully orbited its Falcon 9 boosted Dragon capsule. Robert Bigelow's Bigelow Aerospace is likewise the frontrunning developer of privately built space habitats. Both companies are bringing private sector performance values to the space enterprise which had been hampered by a government sector mentality up until recently.

Richard Branson's Virgin Galactic is the frontrunner for the exciting new industry of space tourism, due in large part to Branson's fortuitous partnership with pioneering aerospace engineer Burt Rutan. Billionaire Paul Allen also played an important role in that partnership.

The imagination, drive, and careful focus on important future industries and technologies sets these men apart from less imaginative billionaires. But it is the ability to invest large amounts of cash -- and inspire others to do so -- combined with their intelligent and energised future orientation, which gives them power to drive the future.

Although these men do not possess nearly the qualifications of a next level human, perhaps they can be seen as prototypes of next levels. And it is likely that persons very much like these will back the projects which lead to the transitioning of the first next level humans.

It is very fortunate that these large fortunes are under the control of such men as these, rather than under the control of men such as US President Obama and other government officials who have never done an honest day's work or had a truly productive thought in their lives.

The best way to make life better for most people is to make as many countries as possible into lands of opportunity -- where even high school and college dropouts can become billionaires and help bring about a more abundant future.