The Circulation Mill, Thermal Vapour-Cell Variant: A Room-Temperature Source of Axial Spin-Current Circulation

A variant of the Circulation Mill design (DOI 10.5281/zenodo.24100552) replacing the spin-polarised 87Rb Bose-Einstein condensate with a room-temperature thermal vapour cell: toroidal cell, nitrogen buffer gas, distributed D1 optical pumping. Computed budget (SIMULATED, NOT MEASURED): polarisation fraction 0.848, T1 27.8 ms, 3.19e6 circulation quanta per second, fractional error per quantum 0.189, stored buffer 300423 quanta. No conversion to a torsion angle is claimed.

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-11-10
DOI
https://doi.org/10.5281/zenodo.24102257
Primary Topic
Atomic and Subatomic Physics Research
Type
preprint
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preprint

The Circulation Mill, Thermal Vapour-Cell Variant: A Room-Temperature Source of Axial Spin-Current Circulation

William Alexander Aldred
Zenodo (CERN European Organization for Nuclear Research)
Atomic and Subatomic Physics Research
preprint

The Circulation Mill, Thermal Vapour-Cell Variant: A Room-Temperature Source of Axial Spin-Current Circulation

William Alexander Aldred
preprint en

Abstract

A variant of the Circulation Mill design (DOI 10.5281/zenodo.24100552) replacing the spin-polarised 87Rb Bose-Einstein condensate with a room-temperature thermal vapour cell: toroidal cell, nitrogen buffer gas, distributed D1 optical pumping. Computed budget (SIMULATED, NOT MEASURED): polarisation fraction 0.848, T1 27.8 ms, 3.19e6 circulation quanta per second, fractional error per quantum 0.189, stored buffer 300423 quanta. No conversion to a torsion angle is claimed.

Zenodo (CERN European Organization for Nuclear Research)
Atomic and Subatomic Physics Research
DOIOpen Access PDFOpenAlex
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The Circulation Mill, Thermal Vapour-Cell Variant: A Room-Temperature Source of Axial Spin-Current Circulation — William Alexander Aldred · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS