Optimizing Spin Dressing Sensitivity for the nEDMSF Experiment
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866916711634042880 |
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| author | Cianciolo, V. |
| author_facet | Cianciolo, V. |
| contents | nEDMSF aims to measure the neutron electric dipole moment ($d_n$) with unprecedented precision. In this paper we explore the experiment's sensitivity when operating with an implementation of the critical dressing method in which the angle between the neutron and Helium-3 spins ($ϕ_{3n}$) is subjected to a square modulation by an amount $ϕ_d$ (the "dressing angle"). Several parameters can be tuned to optimize sensitivity. We find roughly 10% improvement over a previous estimate, resulting primarily from the addition of a waiting period between the $π/2$ pulse that initiates $d_n$-driven $ϕ_{3n}$ growth and the start of $ϕ_{3n}$ modulation. We find negligible further improvement by allowing $ϕ_d$ to vary continuously over the course of a run, and no degradation resulting from the addition of an in situ background measurement into each $ϕ_{3n}$ modulation sequence. A complete simulation confirms a 300 live-day sensitivity of $σ= 1.45\times10^{-28}\,e \cdot \rm{cm}$. At this level of sensitivity, $σ_{ϕ_{3n0}} = 1\,{\rm mrad}$ precision on the initial $n/^3{\rm He}$ angle difference is not negligible. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_19033 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Optimizing Spin Dressing Sensitivity for the nEDMSF Experiment Cianciolo, V. Instrumentation and Detectors Nuclear Experiment nEDMSF aims to measure the neutron electric dipole moment ($d_n$) with unprecedented precision. In this paper we explore the experiment's sensitivity when operating with an implementation of the critical dressing method in which the angle between the neutron and Helium-3 spins ($ϕ_{3n}$) is subjected to a square modulation by an amount $ϕ_d$ (the "dressing angle"). Several parameters can be tuned to optimize sensitivity. We find roughly 10% improvement over a previous estimate, resulting primarily from the addition of a waiting period between the $π/2$ pulse that initiates $d_n$-driven $ϕ_{3n}$ growth and the start of $ϕ_{3n}$ modulation. We find negligible further improvement by allowing $ϕ_d$ to vary continuously over the course of a run, and no degradation resulting from the addition of an in situ background measurement into each $ϕ_{3n}$ modulation sequence. A complete simulation confirms a 300 live-day sensitivity of $σ= 1.45\times10^{-28}\,e \cdot \rm{cm}$. At this level of sensitivity, $σ_{ϕ_{3n0}} = 1\,{\rm mrad}$ precision on the initial $n/^3{\rm He}$ angle difference is not negligible. |
| title | Optimizing Spin Dressing Sensitivity for the nEDMSF Experiment |
| topic | Instrumentation and Detectors Nuclear Experiment |
| url | https://arxiv.org/abs/2410.19033 |