Performance of the MORA Apparatus for Testing Time-Reversal Invariance in Nuclear Beta Decay
Abstract
The MORA experimental setup is designed to measure the triple-correlation D parameter in nuclear beta decay. The D coefficient is sensitive to possible violations of time-reversal invariance. The experimental configuration consists of a transparent Paul trap surrounded by a detection setup with alternating beta and recoil-ion detectors. The octagonal symmetry of the detection setup optimizes the sensitivity of positron-recoil-ion coincidence rates to the D correlation, while reducing systematic effects. MORA utilizes an innovative in-trap laser polarization technique. The design and performance of the ion trap, associated beamline elements, lasers and beta and recoil-ion detectors, are presented. Recent progress towards the polarization proof-of-principle is described.
Keywords
Cite
@article{arxiv.2504.16957,
title = {Performance of the MORA Apparatus for Testing Time-Reversal Invariance in Nuclear Beta Decay},
author = {N. Goyal and A. Singh and S. Daumas-Tschopp and L. M. Motilla Martinez and G. Ban and V. Bosquet and J. F. Cam and P. Chauveau and S. Chinthakayala and G. Fremont and R. P. De Groote and F. de Oliveira Santos and T. Eronen and A. Falkowski and X. Flechard and Z. Ge and M. Gonzalez-Alonso and H. Guerin and L. Hayen and A. Jaries and M. Jbayli and A. Jokinen and A. Kankainen and B. Kootte and R. Kronholm and N. Lecesne and Y. Merrer and V. Morel and M. Mougeot and G. Neyens and J. Perronnel and M. Reponen and A. Raggio and S. Rinta-Antila and A. Rodriguez-Sanchez and N. Severijns and J. C. Thomas and C. Vandamme and S. Vanlangendonk and V. Virtanen and E. Lienard and I. D. Moore and P. Delahaye},
journal= {arXiv preprint arXiv:2504.16957},
year = {2025}
}
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18 pages