Pith Number

pith:7K7VNAKQ

pith:2026:7K7VNAKQCBDW5DY64SMDGUMGMI

not attested not anchored not stored refs resolved

Production of Intense Spin-Polarized Beams of Hydrogen Isotopes by Charge Transfer with High Density Raman-Pumped Alkali-Metal Vapors

Cary B. Forest, Deniz D. Yavuz, Thad G. Walker

Multi-ampere spin-polarized hydrogen isotope beams can be produced by charge transfer in Raman-pumped cesium vapor.

arxiv:2605.16663 v1 · 2026-05-15 · physics.atom-ph · nucl-ex · physics.plasm-ph

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Record completeness

1 Bitcoin timestamp

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

It should be possible to generate multi-ampere spin-polarized beams of hydrogen isotopes by repeated charge-transfer collisions in highly spin-polarized Cs vapor.

C2weakest assumption

Off-resonant Raman pumping with kW scale narrowband tunable light at 895 nm should be able to produce a 1 m long, 10 cm diameter volume of 80% polarized Cs vapor.

C3one line summary

Estimates indicate that kW-scale Raman pumping at 895 nm can produce 80% polarized Cs vapor for charge-transfer generation of intense nuclear spin-polarized H isotope negative ion beams suitable for fusion applications.

References

20 extracted · 20 resolved · 0 Pith anchors

[1] R. M. Kulsrud, H. P. Furth, E. J. Valeo, P. Plasnza, N. Jersey, and M. Goldhaber, Fusion Reactor Plasmas with Polarized Nuclei, Phys. Rev. Lett.49, 1248 (1982) 1982

[2] W. W. Heidbrink, L. R. Baylor, M. B¨ uscher, R. W. En- gels, A. V. Garcia, A. G. Ghiozzi, G. W. Miller, A. M. Sandorfi, X. Wei, and X. Zheng, A research program to measure the lifetime of spin polariz 2024 · doi:10.3389/fphy.2024.1355212

[3] R. Kulsrud, E. Valeo, and S. Cowley, Physics of spin- polarized plasmas, Nuclear Fusion26, 1443 (1986) 1986

[4] Zelenski, Polarized Ion Sources, inParticle Acceler- ation and Detection, Vol

[5] P. G. Sona, A new method proposed to increase polar- ization in polarized ion sources of H- and D-, Energia Nucleare14, 295–299, (1967) 1967

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-20T00:02:35.058965Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fabf56815010476e8f1ee498335186621097f88b3cee31206a5b994e4baeae13

Aliases

arxiv: 2605.16663 · arxiv_version: 2605.16663v1 · doi: 10.48550/arxiv.2605.16663 · pith_short_12: 7K7VNAKQCBDW · pith_short_16: 7K7VNAKQCBDW5DY6 · pith_short_8: 7K7VNAKQ

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/7K7VNAKQCBDW5DY64SMDGUMGMI \
  | 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: fabf56815010476e8f1ee498335186621097f88b3cee31206a5b994e4baeae13

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c571e53f8005dbb28e7cd4e0090820882014aba66406ca5e122d65a31f35952",
    "cross_cats_sorted": [
      "nucl-ex",
      "physics.plasm-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2026-05-15T22:01:28Z",
    "title_canon_sha256": "6c4d8f81426e4535eefb4d29a11bdf9374b0b4e3775572831d68d3ace978205b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.16663",
    "kind": "arxiv",
    "version": 1
  }
}