Nick Hawker Profile picture
Nov 27 8 tweets 3 min read
Read about our pilot plant design in tomorrows Telegraph! Unlocking scalability with a tritium production plant, as well as making the financing a lot easier. @Telegraph @FLFusion 🧵
telegraph.co.uk/business/2022/…
The revenue from tritium could be 5x more than that from electricity. But only if you have customers. Eventually, tritium will be easy to come by, but not at first. The pilot plant has a one-time opportunity, one valuable enough to pay for the plant.
We're also keen to announce this approach to counter some nonsense that has been written about tritium. Seriously @ScienceMagazine...
science.org/content/articl…
Another reason we're keen to talk about this is that the challenges of tritium have pushed others to look at alternative fuels. We think the physics risks far outweigh the engineering challenges. We can easily overproduce tritium with the lithium first wall.
The total inventory is also low due to the high burn fraction of inertial fusion, a common feature. And we are working with @CNL_LNC on how to get it out of the lithium. Good single pass efficiency, even at low concentrations, certainly possible.
In terms of plant costs, the biggest thing is the driver, the pulsed power machine which will launch the projectile. We anticipate our gain demonstrator will cost $1.8 / J of stored energy. For the pilot plant we are taking $6 / J.
Others in fusion are assuming major cost falls for key components. We are not. The plant version has to be rep rated and much more robust.
Scalability is key. We need hundreds of fusion power plants by 2050 if we are going to make a difference to #ClimateEmergency. This pilot plant design helps unlock #fusion power at scale. /END

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More from @FLF_Nick

Apr 26
After a long time on fusion shots, we're back to diagnostic work. We're measuring the x-ray spectrum emitted from the plasma, which is a way of measuring it's temperature. Using 6 channels per shot with different filters we can get the spectrum. (1/n) 🧵 @FLFusion #fusion
The set here covers a range of photon energies from ~500 - 1500 eV. The Cu one stands out; each filter transmits a specific energy window. Unfortunately, nothing is easy. To get the x-rays out we have to put a hole in the target. (2/n)
The hole changes the dynamics, so we have to simulate the diagnostic version with the hole and check our results against that. The x-rays also interact with the hole. They can be absorbed in the walls and vapourise them, making them expand and making the hole close up. (3/n)
Read 4 tweets
Apr 5
Enough lay-chat. What have we really done? Everything here comes from our white paper detailing the experimental results. If you want them, every single raw data trace is there. 🧵(1/n)

firstlightfusion.com/science-hub/va…
The signature of fusion is emission of neutrons. This pic shows DT fuel; we used DD in today's result. The DD reaction also produces a neutron, but 2.45 MeV instead of 14.1 MeV. (2/n)
We used two different types of neutron detector. The scintillators give time-resolved information, are more sensitive, but are also sensitive to photons at all wavelengths. This means careful light-tighting (lots of bin bags and "science tape"). (3/n)
Read 14 tweets

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