Cryogenic Buffer Gas Cooling of Tungsten Carbide for eEDM
POSTER
Abstract
The electron electric dipole moment (eEDM) is one of the most sensitive probes for exploring new physics beyond the Standard Model.
In recent eEDM experiments, polar molecules have been widely used because they provide large internal electric fields acting on the electron and possess favorable state structures for precision measurements.
As a promising candidate for further sensitivity improvement, we focus on tungsten carbide (WC).
WC allows the use of its ground state for the measurement, offering the possibility to reduce statistical uncertainty by extending the interaction time. Also, WC is non-radioactive, making it easier and safer to handle in experiments.
To perform WC-based measurement, establishing a high-density, slow-cooling molecular beam source is essential.
For this purpose, we are developing a molecular beam based on buffer-gas cooling technology. Buffer-gas cooling is a technique in which target molecules are thermalized through collisions with a cold inert gas.
To our knowledge, a buffer-gas-cooled WC beam has not yet been demonstrated in previous studies.
In this poster, we report our progress toward producing a buffer-gas-cooled WC molecular beam.
In recent eEDM experiments, polar molecules have been widely used because they provide large internal electric fields acting on the electron and possess favorable state structures for precision measurements.
As a promising candidate for further sensitivity improvement, we focus on tungsten carbide (WC).
WC allows the use of its ground state for the measurement, offering the possibility to reduce statistical uncertainty by extending the interaction time. Also, WC is non-radioactive, making it easier and safer to handle in experiments.
To perform WC-based measurement, establishing a high-density, slow-cooling molecular beam source is essential.
For this purpose, we are developing a molecular beam based on buffer-gas cooling technology. Buffer-gas cooling is a technique in which target molecules are thermalized through collisions with a cold inert gas.
To our knowledge, a buffer-gas-cooled WC beam has not yet been demonstrated in previous studies.
In this poster, we report our progress toward producing a buffer-gas-cooled WC molecular beam.
Presenters
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Haruto Uchimura
- Okayama University