Precision polarimetry with real-time mitigation of optical-window birefringence

Park, B. K.; Sushkov, Alexander O.; Budker, Dmitry

doi:10.1063/1.2835902

Cited by 6 publications

(5 citation statements)

References 12 publications

(16 reference statements)

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“…Spectroscopy without PNC and E2 fields can also be used to probe errors occurring to imperfections in geometric alignment and polarisation. The polarisation can be kept pure, using approaches such as in e.g., [53,54].…”

Section: Possible Extensionsmentioning

confidence: 99%

Analysis of an Optical Lattice Methodology for Detection of Atomic Parity Nonconservation

et al. 2020

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We present an extension and a deepened analysis of a suggested experimental scheme for detecting atomic parity violation, previously published in Phys. Rev. A 2019, 100, 050101. The experimental concept is described in more detail and we compute new ab initio data necessary for assessing the plausibility of the approach. Original theoretical data for transition matrix elements on the electric dipole forbidden transition in caesium 6 s 2 S 1 / 2 – 5 d 2 D 3 / 2 are reported, as are a range of electric dipole matrix elements connected to the ground state 6s. The latter is used for an analysis of the wavelength-dependent light shift in Cs. A range of experimental details is presented, combined with a survey of realistic lasers parameters. These are adopted to project the feasibility of the scheme to eventually be capable of delivering data beyond the standard model of particle physics.

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Section: Possible Extensionsmentioning

confidence: 99%

Analysis of an Optical Lattice Methodology for Detection of Atomic Parity Nonconservation

et al. 2020

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“…However, by measuring the level shifts first with only the optical lattice turned on, and then the optical lattice and the E2 standing wave, these can be corrected for, and techniques for quantifying induced ellipticity in situ have been reported in e.g. [29,30]. The atoms must be confined to a small volume, where conditions for detection are met.…”

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confidence: 99%

Optical-lattice-based method for precise measurements of atomic parity violation

et al. 2019

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We propose a method for measuring parity violation in neutral atoms. It is an adaptation of a seminal work by Fortson [Phys. Rev. Lett. 70, 2383(1993], proposing a scheme for a single trapped ion. In our version, a large sample of neutral atoms should be localised in an optical lattice overlapping a grid of detection sites, all tailored as the single site in Fortson's work. The methodology is of general applicability, but as an example, we estimate the achievable signal in an experiment probing a nuclear spin independent parity violation on the line 6s 2 S 1/2 -5d 2 D 3/2 in 133 Cs. The projected result is based on realistic parameters and ab initio calculations of transition amplitudes, using the relativistic coupled-cluster method. The final result is a predicted spectroscopic signature, evidencing parity violation, of the order of 1 Hz, for a sample of 10 8 atoms. We show that a total interrogation time of 30000 s should, together with existing theoretical data, suffice for achieving a precision in the determination of the weak charge of Cs of the order of 0.1% -a sensitivity surpassing previously reported determinations by at least a factor of five.

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“…1, 2 While mounting stress can be made small enough to avoid glass breakage, such schemes lead to large and unstable stress-induced birefringence. Applications, such as ellipsometry, 3 polarimetry, 4 and some optical build-up cavities, 5 require precise control over the polarization of laser beams that pass through vacuum windows. Indium gaskets are then preferred, at the cost of limiting baking temperatures to 149 • C. [6][7][8] Building on this earlier work, we have devised an indium seal scheme that can be used without modifying a ConFlat R (CF) vacuum chamber and that gives a birefringence, n = 2.3 × 10 −7 .…”

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confidence: 99%

Note: Mounting ultra-high vacuum windows with low stress-induced birefringence

Solmeyer

Weiss

2011

Review of Scientific Instruments

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We have developed a way to mount ultra-high vacuum windows onto standard ConFlat(®) vacuum systems with very low stress-induced birefringence. Each window is sealed to a stainless steel flange with a compressed indium wire, and that flange is connected to a vacuum chamber with another indium seal. We find that deformation of a standard ConFlat flange during indium sealing dominates the stress on the window, so an extra-rigid flange is needed for minimal birefringence. With this mounting scheme, the typical residual birefringence is Δn = 2.3 × 10(-7) and is unchanged by a 120 °C bake.

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Precision polarimetry with real-time mitigation of optical-window birefringence

Cited by 6 publications

References 12 publications

Analysis of an Optical Lattice Methodology for Detection of Atomic Parity Nonconservation

Analysis of an Optical Lattice Methodology for Detection of Atomic Parity Nonconservation

Optical-lattice-based method for precise measurements of atomic parity violation

Note: Mounting ultra-high vacuum windows with low stress-induced birefringence

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