r/fusion • • 1h ago

Role of Device Size on Island Divertor Performance of W7-X-like Configurations - heat stays fine below 5 MW/m^2 even in power plant like four times this size QI Stellarator

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• Upvotes

r/fusion • • 12h ago

I had a weird time at Pacific Fusion

0 Upvotes

Edit 1: Added proof this isn't AI generated

Last month a FAANG engineer on an expiring visa asked me to come to a meeting with him to talk to members of Pacific Fusion's executive team along with some of the highest-ranking scientists in the enterprise.

He had a cloud genAI SaaS in fast solver discovery that he wanted me to announce myself as a founder of, but no founder's agreement in hand, so I went as a fusion scientist instead.

I figured that the only reason for me to be at the meeting was if Bennett-Shumlak-Hartman vortices were inside the dynamic pulser driven screw-pinch that Pacific Fusion forms out of their liner when it's imploded on radially by an azimuthally-symmetric electrostatic field. So, I asked the representatives from Pacific Fusion if this was the case, and they both nodded their heads yes.

The executive presiding over that branch of the group gave me a real nasty grin with their eyes hooded so that I could see the complete darkness, and vice, in their soul when they did this, while the head of the scientists looked a little ill but gave a nod.

Great! I thought. Their modelling interests were in magnetic diffusion, so when the axial magnetic field diffuses away sufficiently what's left is an equilibrium defined by the Z-pinch, and it was recently shown that in this kind of situation a large radial shear in the axial velocity appears: https://pubs.aip.org/aip/mre/article/11/5/057402/3397993/3D-dynamics-of-a-premagnetized-gas-puff-Z-pinch Correct me if I'm wrong, please :) Peep the enhanced thermodynamic gradient in the ions as well. Another thing to note is that the BSH vortex has to account for non-trivial magnetic diffusion when the Reynold's magnetic number stands finite.

Imagine my disappointment when they don't care. At all.

They didn't care that we could study this system to greater depth in order to understand how to increase their fusion energy yield by increasing the thermal confinement time of the burn state.

The whole experience left me questioning many things, like their seriousness about net facility gain, and what's actually going on over there. Maybe it really is like Stephen Hudgens told me once about inertial confinement fusion "it's just a weapons program".

The only answer I ever got was that Pacific Fusion likes to do their target physics in house. I understand that's their operating norm, but lately I've been doing some of their target physics in my house.


r/fusion • • 13h ago

If nuclear fusion requires such high temperatures and pressures to even occur, wouldn't the net increase of energy released from fusion just be zero? If not, why?

0 Upvotes

r/fusion • • 13h ago

W7-X In-Vessel Control Coils: Short Pulse Operation improvement

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4 Upvotes

r/fusion • • 17h ago

US nuclear fusion reactor to test custom exhaust to tame plasma heat

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17 Upvotes

r/fusion • • 1d ago

Improved fusion yields at NIF via ramped-profile capsule doping - results including current record scientific gain 4.1

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31 Upvotes

r/fusion • • 1d ago

Princeton UniversityEconomical Proton-Boron11 Fusion Cancelled

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27 Upvotes

r/fusion • • 2d ago

Interview with CEO of TRUMF Lasers: perspective on diode Laser fusion

10 Upvotes

I sum up statements by German edition of Scientific American (Spektrum der Wissenschaft), this company is the biggest and leading diode Laser manufacturer in the world. Keep in mind, that not only Focused Energy relies on such lasers, but also Inertia Enterprises, Marvel Fusion and likely others too, they are in close exchange with Focused Energy in Darmstadt Germany:

They need about 1200 such lasers for a power plant, heat dissipation is feasible, frequency of 10 Hz shots too. They need a team of 100 to 150 to develop a mass manufacturable prototype, 250 million Euro and five years.

He criticizes that the German government builds a magnet fusion hub, but no comparable laser fusion hub, which is merely a laser research facility. There are at least 5 billion Euro required to build a power plant prototype of this kind.

Remark: Proxima Fusion needs 1.2 billion Euro by German government to build the Proxima Alpha demonstration Stellarator. They might have better chances regarding this step at least.


r/fusion • • 2d ago

UT Wins Award from Google.org to Apply AI in Fusion Energy Research

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14 Upvotes

r/fusion • • 2d ago

Inside Helion's capacitor manufacturing line

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19 Upvotes

r/fusion • • 2d ago

November (APS-DPP)

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5 Upvotes

r/fusion • • 2d ago

Helion's license increased from 2 to 150 grams of tritium for Polaris and Orion, and Orion shield walls designed for DT operation

21 Upvotes

See documents in shared Google Drive folder here: https://drive.google.com/drive/folders/1WcKuE9NcSL4vk7VlPLM8TfgEhzLk5dJw?usp=sharing

Radioactive Materials License:

The application begins on page 18 of the RML package. The maximum inventory at Polaris was changed from 0.02 MCi to 0.45 MCi, while Orion is licensed for 1.03 MCi. One gram of tritium is 9,650 Ci.

Orion Shielding Report:

The shield walls will be 2.7 meters (9 feet) of heavy aggregate high-density concrete, and the ceiling will be 2-meter-thick panels of high-density concrete.

This doesn't mean Orion will definitely operate with DT, but it does mean that the risk that D-He3 doesn't work is still a consideration.

A comparison with Polaris's neutron shield vault is interesting. Polaris's walls were 2.5 feet of borated concrete lined with 2.5 feet of borated polyethylene (BPE). The design called for solid blocks of BPE, but they ended up stacking slabs of 6-inch BPE held in place by metal plates. Let's just say that the installation looked cumbersome, and they never submitted as-built plans to the city signed off by a structural engineer.

One similarity with Polaris is that they will be adding the roof separately after Orion is installed, meaning there will still be no crane inside the shield.

Building Permits and Inspections for Orion:

The two support buildings for Orion passed their final inspections on Tuesday: a 6,240-square-foot office and control room building and a 26,800-square-foot assembly building.

The generator building is scheduled for insulation inspection next Monday so that means the walls and roof are finished. The floor is still dirt, presumably so they can pour the foundation for the shield walls and there is no sign yet of any crane supports.

Tiny Merge Radioactive Air Emissions License:

Tiny Merge is located in Helion's HQ building in the same location as the Polaris Formation Test machines. They are applying for a RAEL because they will be doing low-level DD fusion in Tiny Merge, which they didn't do with the Formation Test. This is the same level of license they had with Trenta in Redmond, a Potential Impact Category Level 4 (PIC 4) classification. Polaris and Orion are both classified as PIC 1.


r/fusion • • 2d ago

West in nuclear fusion race with China, says UKAEA CEO Dennis Whyte

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50 Upvotes

r/fusion • • 2d ago

How close is commercial fusion? TechCrunch disrupt 26 with CFS CEO Brandon Sorbom

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15 Upvotes

r/fusion • • 3d ago

Help with guidance on student-led research on materials fatigue and metallurgy with applications to Fusion

4 Upvotes

Hello! My university has an independent student research grant available, and I'd like to do research on advanced manufacturing techniques. This includes casting and forging, then do fatigue analysis. I'd really like to have this research apply to fusion, especially Stellarators as I know there will have to be some innovation in manufacturing to get Q>1 (though anything would be awesome). Could anyone give me some avenues to look at? I'm not trying to have research spelled out for me, but I would just love some pointers on how I can begin to formulate a topic. Thanks!


r/fusion • • 3d ago

16 New 2027 Internship Postings - CFS(10) and Helion (6)

12 Upvotes

r/fusion • • 3d ago

Interview with organizers of the Virginia Fusion Symposium

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3 Upvotes

r/fusion • • 3d ago

High Performance materials for Fusion - Fraunhofer

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6 Upvotes

r/fusion • • 3d ago

Fusion 101: What is Q greater than 1?

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12 Upvotes

r/fusion • • 4d ago

First divertor discharges KTM tokamak: initial results - material testing first wall

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9 Upvotes

r/fusion • • 4d ago

Last night's Jeopardy!

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2 Upvotes

r/fusion • • 4d ago

Three fusion companies in DOE’s Milestone program have updates (Xcimer, Zap, & CFS)

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17 Upvotes

r/fusion • • 4d ago

Fusion Fortnightly Oct. 14 - Dan Brunner

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8 Upvotes

r/fusion • • 4d ago

The Fusion Future with Dennis Whyte - PBS NOVA

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8 Upvotes

r/fusion • • 4d ago

UK Fusion Energy Ltd Annual Report and Accounts 2025/26

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2 Upvotes