Pith Number

pith:YYHFQWNB

pith:2026:YYHFQWNBYLR4JYZVKQREBQW52Q

not attested not anchored not stored refs resolved

FIRM3D: Fast ion reduced models in 3D

Abdullah Hyder, Alexandra Lachmann, Alexey Knyazev, Christopher Albert, Elizabeth Paul, Matt Landreman, Michael Czekanski

FIRM3D supplies an open-source suite that integrates guiding-center orbits of energetic particles through three-dimensional magnetic fields while linking to MHD equilibrium and wave codes.

arxiv:2605.16734 v1 · 2026-05-16 · physics.plasm-ph

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\pithnumber{YYHFQWNBYLR4JYZVKQREBQW52Q}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

FIRM3D is an open-source Python/C++/CUDA software suite for modeling energetic particle dynamics in 3D magnetic fields, available at https://github.com/ColumbiaStellaratorTheory/firm3d, with CPU and GPU parallelized integration of the guiding center orbit equation and interfaces with MHD equilibrium and wave stability software.

C2weakest assumption

The guiding-center approximation remains valid for the energetic particle populations of interest and that the interfaces to external codes (BOOZ_XFORM, AE3D, FAR3D) supply accurate and compatible field and wave data without introducing significant numerical artifacts.

C3one line summary

FIRM3D is a standalone open-source framework for CPU/GPU-parallel guiding-center integration of energetic particle orbits in 3D fields, with interfaces to MHD equilibrium and wave codes plus diagnostics.

References

24 extracted · 24 resolved · 1 Pith anchors

[1] G., Buchholz, R., Kasilov, S 2023

[2] Albert, C. G., Kasilov, S. V., & Kernbichler, W. (2020). Symplectic integration with non-canonical quadrature for guiding-center orbits in magnetic confinement devices. Journal of Computational Physic 2020

[3] Boost.Numeric.Odeint. (2025). Boost.odeint: Solving ordinary differential equations in C++ . https://www.boost.org/libs/numeric/odeint 2025

[4] Boozer, A. H. (1995). Quasi-helical symmetry in stellarators. Plasma Physics and Controlled Fusion, 37(11A), A103 1995

[5] J., & Hudson, S 2025

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-20T00:02:38.994259Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c60e5859a1c2e3c4e335542240c2ddd400875de6db2d0833c8611f7b8e33fd71

Aliases

arxiv: 2605.16734 · arxiv_version: 2605.16734v1 · doi: 10.48550/arxiv.2605.16734 · pith_short_12: YYHFQWNBYLR4 · pith_short_16: YYHFQWNBYLR4JYZV · pith_short_8: YYHFQWNB

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/YYHFQWNBYLR4JYZVKQREBQW52Q \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: c60e5859a1c2e3c4e335542240c2ddd400875de6db2d0833c8611f7b8e33fd71

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8a54be0a6974015670a5568150fdf92caab7cb514d4281522b769bdf9b6b84a",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.plasm-ph",
    "submitted_at": "2026-05-16T00:59:27Z",
    "title_canon_sha256": "e2d26f27e9da7d054b6e6cb4319c7a546badb476ad29b369ec85a0d9e8cceb95"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.16734",
    "kind": "arxiv",
    "version": 1
  }
}