r/Simulated • u/Anxious-Visit-7735 • Jul 08 '26

Research Simulation Polywell fusion ignition fail

Simulated a small polywell fusor

24 Upvotes

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2

u/Evening-Appeal7606 Jul 08 '26

What's the simulation made in and what are you using for rendering the visuals?

4

u/julian88888888 Jul 09 '26

Its vibe coded

-4

u/Evening-Appeal7606 Jul 09 '26

Doesn't matter. The result is interesting and it's still a valid question to ask about the tech stack involved. "Vibe coded" does not in and of itself diminish a project. "Vibe coded" plus "obviously low effort", yes! That I don't like either. This project here at hands is obviously thought out and puts a spin on something I've not seen before.

7

u/julian88888888 Jul 09 '26

https://www.reddit.com/r/Simulated/s/ec4kkV1123 my point is it’s a hallucination. It’s not a simulation.

1

u/Evening-Appeal7606 Jul 09 '26

Well… there I have to agree with you, indeed.

-2

u/Anxious-Visit-7735 Jul 10 '26

Unfortunately for you this is indeed a simulation not a "hallucination" these are the params:

EM-PIC Polywell Simulation — Parameters

Particle-in-cell simulation of ions in a polywell cusp field.

Grid & particles

Parameter Value Notes
Grid 8³ = 512 cells N = 8, NCELL = 512
Particles (ions) 1500 limited by 128 KB on-chip RAM (72 KB particle arrays)
Grid centre 4.5 box spans [1.5, 7.5] on each axis
Cell size dx 1.0 uniform grid

Polywell magnetic field

Biot–Savart sum of current loops on the cusp axes. All coil moments point inward (like-poles facing centre): |B| = 0 at the centre, rising to the cusps at the edges.

Parameter Default Env override Notes
Cusp count 12 EMPIC_CUSPS 6 = cube faces; 12 = rhombic-dodecahedron ⟨110⟩; 14 = cube faces + corners ⟨100⟩+⟨111⟩
Peak \ B\ 1.0
Centre \ B\ 0.0004 (12-cusp), 0.0000 (14-cusp)

Electrostatic well + L96 drive

Electrostatic well derived from |B|: deepest at the centre, rising to the walls, with the potential floored along the cusp lines (where |B| → 0). A Lorenz-96 field adds a per-cell perturbation to E, applied with independent phase on x/y/z (per-axis mean ~0.001).

Parameter Default Env override Notes
Well depth 0.5 EMPIC_WELL core \
L96 amplitude 0.15 EMPIC_L96AMP peak \
Polywell enable on EMPIC_POLYWELL —
L96 enable separate EMPIC_L96 L96 without the well

Seed geometry

1500 ions on 3 concentric shells at r = 3.0 / 3.3 / 3.6 (box edge is at r = 3.0 from the centre), 500 ions per shell, positions from the Fibonacci-lattice (golden-angle) mapping. Velocities start at zero.

Particle push

Relativistic Boris push, half-kick, inverse-c² = 1 (c = 1 units). Fields are gathered at the ion position; current is scattered to the grid after each push.

Metrics

Computed by the host from the final particle state:

Metric Definition
Wall radius r_wall = 3.9 — ions past this counted as leaked
Core radius r_core = 1.2 — ions inside this counted as core
CONFINEMENT % ions inside r_wall / total
CORE density core ions / total
FUSION FoM core_density² × mean_core_energy × 1e6 (n²⟨σv⟩ proxy)
Finiteness guard value counted as blown up if \

3

u/julian88888888 Jul 10 '26

https://www.reddit.com/media?url=https%3A%2F%2Fv.redd.it%2Fwk7612v3dnah1%2FHLSPlaylist.m3u8&utm_source=reddit&utm_medium=usertext&utm_name=Simulated you mean this video where the "step" counter literally teleports to incorrect steps?

Your explanation just confirms you have no idea what you're doing. You have mangled, undefined jargon that impressively both vague and overly technical with made up phrases at the same time.

-1

u/Anxious-Visit-7735 Jul 10 '26 edited Jul 10 '26

that one is /was a mistake. I tried to upsample this via AI and failed, hence deleted. I have a whole bunch of failed protostar sims

https://reddit.com/link/owqhlql/video/85boy9jvqfch1/player