Traveling-wave deceleration of SrF molecules

Berg, J. E. van den; Mathavan, Sreekanth Chirayath; Meinema, C.; Nauta, Janko; Nijbroek, Tomas; Jungmann, Klaus-Peter; Bethlem, Hendrick L.; Hoekstra, Steven

doi:10.1016/j.jms.2014.02.004

Cited by 40 publications

(59 citation statements)

References 28 publications

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“…The acceptances are almost equal in both the longitudinal and transverse directions, which appears to be particularly advantageous for experiments that are designed to spatially trap the molecules at the end of the decelerator. Both traveling-wave Stark [24,25] and Zeeman [26][27][28][29] decelerators have been successfully demonstrated. Recently, first experiments in which the decelerated molecules are subsequently loaded into static traps have been conducted [30,31].…”

Section: Introductionmentioning

confidence: 99%

Multistage Zeeman decelerator for molecular-scattering studies

Cremers¹,

Chefdeville²,

Janssen³

et al. 2017

Phys. Rev. A

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We present a concept for a multistage Zeeman decelerator that is optimized particularly for applications in molecular beam scattering experiments. The decelerator consists of a series of alternating hexapoles and solenoids, that effectively decouple the transverse focusing and longitudinal deceleration properties of the decelerator. It can be operated in a deceleration and acceleration mode, as well as in a hybrid mode that makes it possible to guide a particle beam through the decelerator at constant speed. The deceleration features phase stability, with a relatively large six-dimensional phase-space acceptance. The separated focusing and deceleration elements result in an unequal partitioning of this acceptance between the longitudinal and transverse directions. This is ideal in scattering experiments, which typically benefit from a large longitudinal acceptance combined with narrow transverse distributions. We demonstrate the successful experimental implementation of this concept using a Zeeman decelerator consisting of an array of 25 hexapoles and 24 solenoids. The performance of the decelerator in acceleration, deceleration, and guiding modes is characterized using beams of metastable helium ( 3 S) atoms. Up to 60% of the kinetic energy was removed for He atoms that have an initial velocity of 520 m/s. The hexapoles consist of permanent magnets, whereas the solenoids are produced from a single hollow copper capillary through which cooling liquid is passed. The solenoid design allows for excellent thermal properties and enables the use of readily available and cheap electronics components to pulse high currents through the solenoids. The Zeeman decelerator demonstrated here is mechanically easy to build, can be operated with cost-effective electronics, and can run at repetition rates up to 10 Hz.

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Section: Introductionmentioning

confidence: 99%

Multistage Zeeman decelerator for molecular-scattering studies

Cremers¹,

Chefdeville²,

Janssen³

et al. 2017

Phys. Rev. A

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show abstract

“…It has been suggested that these systems could be used to measure classes of P-violating electroweak interactions that are difficult to access otherwise [77,78], such as those due to nuclear anapole moments and axial hadronic-vector electronic electroweak couplings [79]. Results in this direction are expected by ongoing experiments in the DeMille and in the Hoekstra groups [80,81].…”

Section: Parity Violationmentioning

confidence: 99%

Laser spectroscopy of cold molecules

Borri

Santambrogio

2016

Advances in Physics: X

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This paper reviews the recent results in high-resolution spectroscopy on cold molecules. Laser spectroscopy of cold molecules addresses issues of symmetry violation, like in the search for the electric dipole moment of the electron and the studies on energy differences in enantiomers of chiral species; tries to improve the precision to which fundamental physical constants are known and tests for their possible variation in time and space; tests quantum electrodynamics, and searches for a fifth force. Further, we briefly review the recent technological progresses in the fields of cold molecules and mid-infrared lasers, which are the tools that mainly set the limits for the resolution that is currently attainable in the measurements.

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“…Unfortunately in such atoms the weak effects are rather small, typically of relative order 10 −9 of the electromagnetic interaction. Atomic or molecular systems with rather large parity violating effects, such as in Yb atoms [11] or in SrF [12] molecules, can be very well exploited for measuring, e.g., anapole moments. In these cases differences between isotopes can be utilized and atomic or molecular theory are required with rather moderate precision.…”

Section: Atomic Parity Violationmentioning

confidence: 99%

Precision Tests of Discrete Symmetries at Low Energies

Jungmann¹,

Dijck²,

Grasdijk³

et al. 2017

Proceedings of the 12th International Conference on Low Energy Antiproton Physics (LEAP2016)

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Low energy precision measurements provide for precise testing of the Standard Model, e.g. in searches for violations of the discrete symmetries charge conjugation (C), parity (P) and time reversal (T) as well as their combinations CP and CPT. We focus here on new experiments concerning atomic parity violation (APV) and searches for a permanent electric dipole moment (EDM) in atoms. In particular, we address precision APV experiments on Ba + and Ra + single ions that will enable the extraction of the Weinberg angle at lowest presently accessible momentum transfer. They are expected to contribute towards searches for new particles such as dark Z-bosons. We also review experimental programmes in which an EDM is searched for and we compare them in a common framework. We describe latest EDM searches in heavy effective two-electron atoms such as Xe and Hg. We also indicate possible future prospects of searches for a permanent EDM of the electron using molecules with large enhancement factors.

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Traveling-wave deceleration of SrF molecules

Cited by 40 publications

References 28 publications

Multistage Zeeman decelerator for molecular-scattering studies

Multistage Zeeman decelerator for molecular-scattering studies

Laser spectroscopy of cold molecules

Precision Tests of Discrete Symmetries at Low Energies

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