|La physique dans tous ses états
|June 21 > 21, 2022 - 11h30
|GANIL, Guest House
Nishu Goyal is in the 2d year of her PhD. At 14h, she will present us “Current status of MORA at IGISOL”
Abstract: The Project MORA focuses on ion manipulation in traps and laser orientation methods for the searches of New Physics (NP) in nuclear beta decay, looking for possible hints to explain the matter-antimatter asymmetry observed in the Universe. The JYFL Accelerator Laboratory and more specifically the IGISOL facility, provides an ideal environment for the initial phase of the MORA experiment. The precise measurement of the so-called triple D correlation is sensitive to Time reversal violation, and via the CPT theorem, to CP violation. The D correlation parameter is particularly sensitive to the existence of Leptoquarks, which are hypothetical gauge bosons appearing in the first theories of baryogenesis. Leptoquarks are now actively searched for at the LHC, the measurements at which provide competitive and complementary constraints. MORA will use an innovative in-trap laser polarization technique for the precision measurement of the D correlation in the decay of 23Mg.
In this regard, the first test experiment with 23Mg beam has been carried out in the IGISOL facility during the period of 17-19th Feb. First, 23Na+ ions from the RF cooler buncher slowed down to 100 eV ions could be nicely optimized for the trapping. Trapping efficiencies ranging from 5 to 50% up to 500 ms could be obtained. During the beam time, copious amount of 23Mg could be produced; 105 ions per μA of primary proton beam. A 90 mW laser beam which was circularly polarized could be injected and aligned within the trap. Despite these achievements, a large contamination of 23Na and a high RF noise on recoil detectors hindered the recording of b-recoil coincidences. Along with the whole description of the project I will be focusing on the present status of MORA, including the beam line preparation and the progresses done with the detection setup during the first online beam period.