Active nuclear spin maser oscillation with double cell

Hikota, Eri; Chikamori, Masatoshi; Ichikawa, Y.; Ohtomo, Yuichi; Sakamoto, Y.; Suzuki, Takahiro; Bidinosti, Christopher; Inoue, Takeshi; Furukawa, T.; Yoshimi, A.; Suzuki, K.; Nanao, T.; Miyatake, Hirokazu; Tsuchiya, Masato; Yoshida, Naoki; Shirai, H.; Ichihara, T.; Ueno, H.; Matsuo, Yukari; Fukuyama, Takeshi; Asahı, K.

doi:10.1051/epjconf/20146605005

Cited by 3 publications

(8 citation statements)

References 5 publications

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“…The dependence of 3 He polarization on the 129 Xe partial pressure was studied by means of the adiabatic fast passage method of NMR [12]. As a result, the 3 He polarization reached 1.0(1) % under a 129 Xe partial pressure of 1 Torr at 80 • C. This partial pressure of 129 Xe is 1/10 of that in the previous study with the double-cell geometry [11]. Thus, there arises a concern with possible attenuation of the signal amplitude of the 129 Xe maser.…”

Section: Introductionmentioning

confidence: 79%

“…The first operation of the maser in the double-cell geometry was carried out for 129 Xe, yielding a precision of 4 μHz in a 10 5 s observation time using the double-cell geometry with 5 mm transfer tube [11]. Although the double-cell geometry was introduced, a correlation between the frequency drift and the cell temperature, that is, the number density of Rb atoms still remained.…”

Section: Introductionmentioning

confidence: 99%

“…Although the incorporation of the 3 He comagnetometry with double-cell geometry should largely facilitate the reduction of systematic uncertainties, it might also bring side effects on the performance of the 129 Xe maser: The adoption of the double-cell geometry reduces the signal amplitude of 129 Xe maser, because the 129 Xe spins relax while they drift from the pumping cell to the probe cell; The reduction of the Rb polarization also leads to the reduction of the spin precession signal of 129 Xe [11].…”

Section: Introductionmentioning

confidence: 99%

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EDM measurement in 129Xe atom using dual active feedback nuclear spin maser

et al. 2014

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The technique of an active nuclear spin maser is adopted in the search for electric dipole moment in a diamagnetic atom 129 Xe. In order to reduce systematic uncertainties arising from long-term drifts of the external magnetic field and from the contact interaction between longitudinal polarized Rb atoms and 129 Xe spin, a 3 He comagnetometer with a double-cell geometry was employed. The remaining shift, which turned out to show some correlation with the cell temperature, was mitigated by stabilizing the cell temperature. As a result, the frequency drift of the 129 Xe maser was reduced from 12 mHz to 700 μHz, and the determination precision of frequency of 8.7 nHz was obtained for a 2 × 10 4 s measurement time using the double-cell geometry cell.

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Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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EDM measurement in 129Xe atom using dual active feedback nuclear spin maser

et al. 2014

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“…Using the double-cell geometry, the drifts in the maser frequency was reduced by a factor of 10 or more compared to the single-cell geometry, however, non-negligible frequency drift still remained [16]. This shift is seems to be caused by the remaining longitudinal polarization of Rb atoms in the probe section, which generated by polarization of the 129 Xe and 3 He.…”

Section: He Comagnetometry With Double-cell Geometrymentioning

confidence: 92%

“…The maser frequency suffers not only from drifts in the external magnetic field but also from contact interactions between 129 Xe/ 3 He spin and the longitudinally polarized Rb spin [16]. In order to mitigate the frequency shift, a double-cell geometry was adopted for the gas cell [12].…”

Section: He Comagnetometry With Double-cell Geometrymentioning

confidence: 99%

¹²⁹Xe EDM Search Experiment Using Active Nuclear Spin Maser

Sato¹,

Ichikawa²,

Ohtomo³

et al. 2015

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)

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An active nuclear spin maser, which enables a precision measurement of spin precession frequency, is employed in the experimental search for permanent electric dipole moment (EDM) in the diamagnetic atom 129 Xe. In order to eliminate systematic errors which limit the sensitivity of the experiment to an EDM, the following tactics are adopted: (i) 3 He comagnetometry for the cancellation of long-term drifts in the external magnetic fields and (ii) double-cell geometry for the mitigation of frequency shifts due to interaction of 129 Xe spin with polarized Rb atoms. In the present work, the design for the double-cell has been changed and a magnetic shield-coil system to provide a highly homogeneous magnetic field has been newly introduced. Thanks to increased polarization and longer 3 He spin relaxation time, the dual-species maser of 129 Xe and 3 He in a double-cell geometry operated successfully. Our experiment is now at the stage of assembling these separate technical elements in order to start the measurement of 129 Xe EDM in the 10 −28 ecm region.

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Double-Cell Geometry for ¹²⁹Xe/³He Co-Magnetometry

Ohtomo¹,

Ichikawa²,

Sato³

et al. 2015

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)

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Comagnetometers play a key role in EDM experiments. They allow one to quantify, and subsequently correct for, any long-term drifts of the external magnetic field. In order to improve the performance of the 3 He comagnetometer for our 129 Xe EDM measurements, we have decided to incorporate a double-cell geometry which enables us to suppress a frequency shift due to contact interaction with polarized Rb atoms. In this study, the production and relaxation of 3 He spin polarization in the double cell were studied. As a result, the followings were achieved: a polarization of 1.04(8)%, a longitudinal spin relaxation time of 10.1(5) h, and a transverse relaxation time of 2,340 s. With these improvements, concurrent operation of the 129 Xe and 3 He masers has been realized, and EDM measurement will be started in near future using a cell designed based on the results of this study.

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Active nuclear spin maser oscillation with double cell

Cited by 3 publications

References 5 publications

EDM measurement in 129Xe atom using dual active feedback nuclear spin maser

EDM measurement in 129Xe atom using dual active feedback nuclear spin maser

¹²⁹Xe EDM Search Experiment Using Active Nuclear Spin Maser

Double-Cell Geometry for ¹²⁹Xe/³He Co-Magnetometry

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Active nuclear spin maser oscillation with double cell

Cited by 3 publications

References 5 publications

EDM measurement in 129Xe atom using dual active feedback nuclear spin maser

EDM measurement in 129Xe atom using dual active feedback nuclear spin maser

129Xe EDM Search Experiment Using Active Nuclear Spin Maser

Double-Cell Geometry for 129Xe/3He Co-Magnetometry

Contact Info

Product

Resources

About

¹²⁹Xe EDM Search Experiment Using Active Nuclear Spin Maser

Double-Cell Geometry for ¹²⁹Xe/³He Co-Magnetometry