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Hot stuff: Lab hits milestone on long road to fusion power
https://phys.org ^ | January 26, 2022 | by Seth Borenstein

Posted on 01/26/2022 12:34:01 PM PST by Red Badger

This illustration provided by the National Ignition Facility at the Lawrence Livermore National Laboratory depicts a target pellet inside a hohlraum capsule with laser beams entering through openings on either end. The beams compress and heat the target to the necessary conditions for nuclear fusion to occur. Credit: Lawrence Livermore National Laboratory via AP

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With 192 lasers and temperatures more than three times hotter than the center of the sun, scientists hit—at least for a fraction of a second—a key milestone on the long road toward nearly pollution-free fusion energy.

Researchers at the National Ignition Facility at the Lawrence Livermore National Lab in California were able to spark a fusion reaction that briefly sustained itself—a major feat because fusion requires such high temperatures and pressures that it easily fizzles out.

The ultimate goal, still years away, is to generate power the way the sun generates heat, by smooshing hydrogen atoms so close to each other that they combine into helium, which releases torrents of energy.

A team of more than 100 scientists published the results of four experiments that achieved what is known as a burning plasma in Wednesday's journal Nature. With those results, along with preliminary results announced last August from follow-up experiments, scientists say they are on the threshold of an even bigger advance: ignition. That's when the fuel can continue to "burn" on its own and produce more energy than what's needed to spark the initial reaction.

"We're very close to that next step," said study lead author Alex Zylstra, an experimental physicist at Livermore.

Nuclear fusion presses together two types of hydrogen found in water molecules. When they fuse, "a small amount (milligrams) of fuel produces enormous amounts of energy and it's also very 'clean' in that it produces no radioactive waste," said Carolyn Kuranz, a University of Michigan experimental plasma physicist who wasn't part of the research. "It's basically limitless, clean energy that can be deployed anywhere," she said.

Researchers around the world have been working on the technology for decades, trying different approaches. Thirty-five countries are collaborating on a project in Southern France called the International Thermonuclear Experimental Reactor that uses enormous magnets to control the superheated plasma. That is expected to begin operating in 2026.

Earlier experiments in the United States and United Kingdom succeeded in fusing atoms, but achieved no self-heating, said Steven Cowley, director of the Princeton Plasma Physics Laboratory, who wasn't part of this study.

But don't bank on fusion just yet.

"The result is scientifically very exciting for us," said study co-author Omar Hurricane, chief scientist for Lawrence Livermore's fusion program. "But we're a long way from useful energy."

Maybe decades, he said.

It's already taken several years inside a lab that is straight out of Star Trek—one of the movies used the lab as background visuals for the Enterprise's engine room—and many failed attempts to get to this point. One adjustment that helped: Researchers made the fuel capsule about 10% bigger. Now it's up to the size of a BB.

That capsule fits in a tiny gold metal can that researchers aim 192 lasers at. They heat it to about 100 million degrees, creating about 50% more pressure inside the capsule than what's inside the center of the sun. These experiments created burning plasmas that lasted just a trillionth of a second, but that was enough to be considered a success, Zylstra said.

Overall, the four experiments in the Nature study—conducted in November 2020 and February 2021—produced as much as 0.17 megajoules of energy, That's far more than previous attempts, but still less than one-tenth of the power used to start the process, Zylstra said. A megajoule is about enough energy to heat a gallon of water 100 degrees Fahrenheit (38 degrees Celsius).

Preliminary results from experiments done later in 2021, which are still being reviewed by other scientists, pushed energy output to 1.3 megajoules and lasted 100 trillionths of second, according to a government press release. But even that is shy of the 1.9 megajoules needed to break even.

"The major problem with fusion is that it is hard," said Princeton's Cowley. "Otherwise, it might be the perfect way to make energy—sustainable, plentiful, safe and minimal environmental impact."


TOPICS: Business/Economy; History; Science
KEYWORDS: energy; fusion; pieinthesky; science; technology

1 posted on 01/26/2022 12:34:01 PM PST by Red Badger
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To: Kevmo; Wonder Warthog; SunkenCiv

Fusion Ping.....................


2 posted on 01/26/2022 12:34:32 PM PST by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: Red Badger

3 posted on 01/26/2022 12:42:35 PM PST by algore
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To: Red Badger

Ah, the Hohlraum Capsule. Why didn’t I see that?


4 posted on 01/26/2022 12:44:22 PM PST by ComputerGuy (Heavily-medicated for your protection)
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To: Red Badger

scientists hit—at least for a fraction of a second—a key milestone on the long road toward nearly pollution-free fusion energy.
***LENR got past that significant milestone and one other milestone more than 30 years ago. Ignition and self-sustain. Some of the LENR cells last for months.
https://freerepublic.com/tag/lenr/index?tab=articles


5 posted on 01/26/2022 12:47:47 PM PST by Kevmo (I’m immune from Covid since I don’t watch TV.🤗)
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To: Red Badger

I notice the difference in the writing from the pr departments. Here they are very negative and down to earth, stressing the shortcomings and difficulties.

Compared to empty claims and effusive or exaggerated rhetoric from most.

The former is a good sign of serious work taken seriously.


6 posted on 01/26/2022 12:47:53 PM PST by ifinnegan (Democrats kill babies and harvest their organs to sell)
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To: Red Badger

We want to boil water, so let’s build a star!


7 posted on 01/26/2022 1:15:45 PM PST by MattMusson (Sometimes the wind blows too much)
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To: Red Badger
" three times hotter than the center of the sun, scientists hit—at least for a fraction of a second "

Then, the pilot light went out!

8 posted on 01/26/2022 1:19:16 PM PST by crazy scenario (The burden of Damascus is next!)
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To: Red Badger

Q: Where is the power coming from to charge the 192 lasers?
A: The CA power grid.

They are a long way off.


9 posted on 01/26/2022 1:25:11 PM PST by Zathras
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To: Red Badger

Hot fusion is and has been 20 years asway for the last 40 years.


10 posted on 01/26/2022 1:26:40 PM PST by mad_as_he$$
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To: mad_as_he$$

I remember 60 years ago, it was also just 20 years away. That, and robots that are smarter than us. And flying cars.


11 posted on 01/26/2022 1:31:25 PM PST by rightwingcrazy (;-,)
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To: ComputerGuy

Well, hohlraums are old technology. AFAIK, it was first developed for the first fusion bombs in the 1950s. Look it up.


12 posted on 01/26/2022 1:34:49 PM PST by backwoods-engineer (But what do I know? I'm just a backwoods engineer.)
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To: Red Badger

Didn’t the Chinese just do the same thing for around 15 minutes a couple weeks ago?


13 posted on 01/26/2022 1:37:01 PM PST by Husker24 (Pp)
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To: rightwingcrazy

Precisely. I heard about “fusion—Energy Forever” in 1962. And yes they said it was 20 years away.


14 posted on 01/26/2022 2:49:51 PM PST by hinckley buzzard ( Resist the narrative.)
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To: Red Badger
""We're very close to that next step," said study lead ..."

Hmmm...
Wish I had ten dollars for every time I uttered those words between 1967 & 1986...
Particularly during the height of a budget/appropriations cycle...

15 posted on 01/26/2022 4:55:56 PM PST by SuperLuminal (Where is another Sam Adams now that we desperately need him?)
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To: SuperLuminal

To dream the impossible dream...................


16 posted on 01/27/2022 5:10:02 AM PST by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: Red Badger

I prefer the Aureon/SAFIRE approach. Inherently stable plasmas. MUCH smaller reactors. And I think they will get to practicality sooner.


17 posted on 01/27/2022 6:14:17 AM PST by Wonder Warthog (Not Responding to Seagull Snark)
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To: Red Badger
:^) I'll post the keyword in a minute.

18 posted on 01/27/2022 7:29:45 AM PST by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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the Fusion keyword, sorted, and otherwise unedited (some unrelated topics may be in there):

19 posted on 01/27/2022 7:30:28 AM PST by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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Sun in a Bottle: The Strange History of Fusion and the Science of Wishful Thinking
Sun in a Bottle:
The Strange History
of Fusion and
the Science of
Wishful Thinking

by Charles Seife


20 posted on 01/27/2022 7:30:55 AM PST by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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