Toward precision polarimetry of dense polarized 3He targets

M. V. Romalis; P. L. Bogorad; G. D. Cates; T. E. Chupp; K. P. Coulter; E. W. Hughes; J. R. Johnson; K. S. Kumar; T. B. Smith; A. K. Thompson; R. Welsh

doi:10.1016/S0168-9002(97)00847-4

Toward precision polarimetry of dense polarized ³He targets

M. V. Romalis, P. L. Bogorad, G. D. Cates, T. E. Chupp, K. P. Coulter, E. W. Hughes, J. R. Johnson, K. S. Kumar, T. B. Smith, A. K. Thompson, R. Welsh

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11 Scopus citations

Abstract

We describe several new measurement and analysis techniques used to determine the polarization of the ³He target in a recently completed measurement of the neutron spin structure function gⁿ₁ at SLAC (E-154). The polarization was determined using two independent methods. The first method used a standard technique of Adiabatic Fast Passage, calibrated by a measurement of Boltzmann polarization in a sample of water. We describe several systematic effects affecting this calibration procedure. The second method used a shift of the Rb Zeeman resonance frequency due to the polarization of ³He. Implementation and calibration of this technique are discussed in detail. Finally, the density of ³He in the cell was measured using two independent methods, one of them based on the pressure broadening of Rb D₁ and D₂ lines due to ³He.

Original language	English (US)
Pages (from-to)	260-267
Number of pages	8
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	402
Issue number	2-3
DOIs	https://doi.org/10.1016/S0168-9002(97)00847-4
State	Published - Jan 11 1998

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Instrumentation

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10.1016/S0168-9002(97)00847-4

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Romalis, M. V., Bogorad, P. L., Cates, G. D., Chupp, T. E., Coulter, K. P., Hughes, E. W., Johnson, J. R., Kumar, K. S., Smith, T. B., Thompson, A. K., & Welsh, R. (1998). Toward precision polarimetry of dense polarized ³He targets. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 402(2-3), 260-267. https://doi.org/10.1016/S0168-9002(97)00847-4

@article{8c457d93eaef4e51abdab0ffee1ebec7,

title = "Toward precision polarimetry of dense polarized 3He targets",

abstract = "We describe several new measurement and analysis techniques used to determine the polarization of the 3He target in a recently completed measurement of the neutron spin structure function gn1 at SLAC (E-154). The polarization was determined using two independent methods. The first method used a standard technique of Adiabatic Fast Passage, calibrated by a measurement of Boltzmann polarization in a sample of water. We describe several systematic effects affecting this calibration procedure. The second method used a shift of the Rb Zeeman resonance frequency due to the polarization of 3He. Implementation and calibration of this technique are discussed in detail. Finally, the density of 3He in the cell was measured using two independent methods, one of them based on the pressure broadening of Rb D1 and D2 lines due to 3He.",

author = "Romalis, {M. V.} and Bogorad, {P. L.} and Cates, {G. D.} and Chupp, {T. E.} and Coulter, {K. P.} and Hughes, {E. W.} and Johnson, {J. R.} and Kumar, {K. S.} and Smith, {T. B.} and Thompson, {A. K.} and R. Welsh",

note = "Funding Information: We would like to thank Prof. M. Tanaka for an invitation to presentt his work at the workshop. One of us (MVR) would like to thank Prof. William Happer for many useful discussions.T his work was supported by the Department of Energy contracts: DE-AC03-76SF0051 5 (SLAC), DE-FG02-90ER40557 (Princeton) and by an NSF Grant 9217979( Michigan).",

year = "1998",

month = jan,

day = "11",

doi = "10.1016/S0168-9002(97)00847-4",

language = "English (US)",

volume = "402",

pages = "260--267",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier B.V.",

number = "2-3",

}

Romalis, MV, Bogorad, PL, Cates, GD, Chupp, TE, Coulter, KP, Hughes, EW, Johnson, JR, Kumar, KS, Smith, TB, Thompson, AK & Welsh, R 1998, 'Toward precision polarimetry of dense polarized ³He targets', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 402, no. 2-3, pp. 260-267. https://doi.org/10.1016/S0168-9002(97)00847-4

TY - JOUR

T1 - Toward precision polarimetry of dense polarized 3He targets

AU - Romalis, M. V.

AU - Bogorad, P. L.

AU - Cates, G. D.

AU - Chupp, T. E.

AU - Coulter, K. P.

AU - Hughes, E. W.

AU - Johnson, J. R.

AU - Kumar, K. S.

AU - Smith, T. B.

AU - Thompson, A. K.

AU - Welsh, R.

N1 - Funding Information: We would like to thank Prof. M. Tanaka for an invitation to presentt his work at the workshop. One of us (MVR) would like to thank Prof. William Happer for many useful discussions.T his work was supported by the Department of Energy contracts: DE-AC03-76SF0051 5 (SLAC), DE-FG02-90ER40557 (Princeton) and by an NSF Grant 9217979( Michigan).

PY - 1998/1/11

Y1 - 1998/1/11

N2 - We describe several new measurement and analysis techniques used to determine the polarization of the 3He target in a recently completed measurement of the neutron spin structure function gn1 at SLAC (E-154). The polarization was determined using two independent methods. The first method used a standard technique of Adiabatic Fast Passage, calibrated by a measurement of Boltzmann polarization in a sample of water. We describe several systematic effects affecting this calibration procedure. The second method used a shift of the Rb Zeeman resonance frequency due to the polarization of 3He. Implementation and calibration of this technique are discussed in detail. Finally, the density of 3He in the cell was measured using two independent methods, one of them based on the pressure broadening of Rb D1 and D2 lines due to 3He.

AB - We describe several new measurement and analysis techniques used to determine the polarization of the 3He target in a recently completed measurement of the neutron spin structure function gn1 at SLAC (E-154). The polarization was determined using two independent methods. The first method used a standard technique of Adiabatic Fast Passage, calibrated by a measurement of Boltzmann polarization in a sample of water. We describe several systematic effects affecting this calibration procedure. The second method used a shift of the Rb Zeeman resonance frequency due to the polarization of 3He. Implementation and calibration of this technique are discussed in detail. Finally, the density of 3He in the cell was measured using two independent methods, one of them based on the pressure broadening of Rb D1 and D2 lines due to 3He.

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DO - 10.1016/S0168-9002(97)00847-4

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VL - 402

SP - 260

EP - 267

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

IS - 2-3

ER -

Toward precision polarimetry of dense polarized ³He targets

Abstract

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