Characterization of magnetic field noise in the ARIADNE source mass rotor

Nancy Aggarwal; Allard Schnabel; Jens Voigt; Alex Brown; Josh C. Long; L. Trahms; A. Fang; Andrew A. Geraci; A. Kapitulnik; D. Kim; Y. Kim; I. Lee; Y. H. Lee; C. Y. Liu; C. Lohmeyer; A. Reid; Y. Semertzidis; Y. Shin; J. Shortino; E. Smith; W. M. Snow; E. Weisman

Characterization of magnetic field noise in the ARIADNE source mass rotor

Nancy Aggarwal^*, Allard Schnabel, Jens Voigt, Alex Brown, Josh C. Long, L. Trahms, A. Fang, Andrew A. Geraci, A. Kapitulnik, D. Kim, Y. Kim, I. Lee, Y. H. Lee, C. Y. Liu, C. Lohmeyer, A. Reid, Y. Semertzidis, Y. Shin, J. Shortino, E. SmithW. M. Snow, E. Weisman

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

ARIADNE is a nuclear-magnetic-resonance-based experiment that will search for novel axion-induced spin-dependent interactions between an unpolarized source mass rotor and a nearby sample of spin-polarized ³He gas. To detect feeble axion signals at the sub-atto-Tesla level, the experiment relies on low magnetic background and noise. We measure and characterize the magnetic field background from a prototype tungsten rotor. We show that the requirement is met with our current level of tungsten purity and demagnetization process. We further show that the noise is dominantly caused by a few discrete dipoles, likely due to a few impurities trapped inside the rotor during manufacturing. This is done via a numerical optimization pipeline which fits for the locations and magnetic moments of each dipole. We find that under the current demagnetization, the magnetic moment of trapped impurities is bounded at 1 × 10⁻⁹ A m²

Original language	English (US)
Journal	Unknown Journal
State	Published - Nov 25 2020

ASJC Scopus subject areas

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Aggarwal, Nancy ; Schnabel, Allard ; Voigt, Jens ; Brown, Alex ; Long, Josh C. ; Trahms, L. ; Fang, A. ; Geraci, Andrew A. ; Kapitulnik, A. ; Kim, D. ; Kim, Y. ; Lee, I. ; Lee, Y. H. ; Liu, C. Y. ; Lohmeyer, C. ; Reid, A. ; Semertzidis, Y. ; Shin, Y. ; Shortino, J. ; Smith, E. ; Snow, W. M. ; Weisman, E. / Characterization of magnetic field noise in the ARIADNE source mass rotor. In: Unknown Journal. 2020.

@article{24737b3515cd45eb891078ce3a8819b3,

title = "Characterization of magnetic field noise in the ARIADNE source mass rotor",

abstract = "ARIADNE is a nuclear-magnetic-resonance-based experiment that will search for novel axion-induced spin-dependent interactions between an unpolarized source mass rotor and a nearby sample of spin-polarized 3He gas. To detect feeble axion signals at the sub-atto-Tesla level, the experiment relies on low magnetic background and noise. We measure and characterize the magnetic field background from a prototype tungsten rotor. We show that the requirement is met with our current level of tungsten purity and demagnetization process. We further show that the noise is dominantly caused by a few discrete dipoles, likely due to a few impurities trapped inside the rotor during manufacturing. This is done via a numerical optimization pipeline which fits for the locations and magnetic moments of each dipole. We find that under the current demagnetization, the magnetic moment of trapped impurities is bounded at 1 × 10−9 A m2",

author = "Nancy Aggarwal and Allard Schnabel and Jens Voigt and Alex Brown and Long, {Josh C.} and L. Trahms and A. Fang and Geraci, {Andrew A.} and A. Kapitulnik and D. Kim and Y. Kim and I. Lee and Lee, {Y. H.} and Liu, {C. Y.} and C. Lohmeyer and A. Reid and Y. Semertzidis and Y. Shin and J. Shortino and E. Smith and Snow, {W. M.} and E. Weisman",

year = "2020",

month = nov,

day = "25",

language = "English (US)",

journal = "Free Radical Biology and Medicine",

issn = "0891-5849",

publisher = "Elsevier Inc.",

}

Characterization of magnetic field noise in the ARIADNE source mass rotor. / Aggarwal, Nancy; Schnabel, Allard; Voigt, Jens; Brown, Alex; Long, Josh C.; Trahms, L.; Fang, A.; Geraci, Andrew A.; Kapitulnik, A.; Kim, D.; Kim, Y.; Lee, I.; Lee, Y. H.; Liu, C. Y.; Lohmeyer, C.; Reid, A.; Semertzidis, Y.; Shin, Y.; Shortino, J.; Smith, E.; Snow, W. M.; Weisman, E.

In: Unknown Journal, 25.11.2020.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Characterization of magnetic field noise in the ARIADNE source mass rotor

AU - Aggarwal, Nancy

AU - Schnabel, Allard

AU - Voigt, Jens

AU - Brown, Alex

AU - Long, Josh C.

AU - Trahms, L.

AU - Fang, A.

AU - Geraci, Andrew A.

AU - Kapitulnik, A.

AU - Kim, D.

AU - Kim, Y.

AU - Lee, I.

AU - Lee, Y. H.

AU - Liu, C. Y.

AU - Lohmeyer, C.

AU - Reid, A.

AU - Semertzidis, Y.

AU - Shin, Y.

AU - Shortino, J.

AU - Smith, E.

AU - Snow, W. M.

AU - Weisman, E.

PY - 2020/11/25

Y1 - 2020/11/25

N2 - ARIADNE is a nuclear-magnetic-resonance-based experiment that will search for novel axion-induced spin-dependent interactions between an unpolarized source mass rotor and a nearby sample of spin-polarized 3He gas. To detect feeble axion signals at the sub-atto-Tesla level, the experiment relies on low magnetic background and noise. We measure and characterize the magnetic field background from a prototype tungsten rotor. We show that the requirement is met with our current level of tungsten purity and demagnetization process. We further show that the noise is dominantly caused by a few discrete dipoles, likely due to a few impurities trapped inside the rotor during manufacturing. This is done via a numerical optimization pipeline which fits for the locations and magnetic moments of each dipole. We find that under the current demagnetization, the magnetic moment of trapped impurities is bounded at 1 × 10−9 A m2

AB - ARIADNE is a nuclear-magnetic-resonance-based experiment that will search for novel axion-induced spin-dependent interactions between an unpolarized source mass rotor and a nearby sample of spin-polarized 3He gas. To detect feeble axion signals at the sub-atto-Tesla level, the experiment relies on low magnetic background and noise. We measure and characterize the magnetic field background from a prototype tungsten rotor. We show that the requirement is met with our current level of tungsten purity and demagnetization process. We further show that the noise is dominantly caused by a few discrete dipoles, likely due to a few impurities trapped inside the rotor during manufacturing. This is done via a numerical optimization pipeline which fits for the locations and magnetic moments of each dipole. We find that under the current demagnetization, the magnetic moment of trapped impurities is bounded at 1 × 10−9 A m2

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