The first successful demonstration of broadband laser cooling of positronium (Ps) atoms, obtained within the AEgIS experiment at CERN, is presented here. By employing a custom-designed pulsed alexandrite laser system at 243 nm featuring long-duration pulses of 70 ns and an energy able to saturate the 13S-23P transition over the broad spectrum range of 360 GHz, the temperature of a room-temperature Ps cloud was reduced from 380 K to 170 K in 70 ns. This advancement opens new avenues for precision spectroscopy, antihydrogen production, and fundamental tests with antimatter.
Laser Cooling Positronium with Broadband Laser Pulses / Caravita, R., Alfaro Campos, S., Auzins, M., Berghold, M., Bergmann, B., Burian, P., Brusa, R.S., Camper, A., Castelli, F., Cerchiari, G., Ciuryło, R., Chehaimi, A., Consolati, G., Doser, M., Eliaszuk, K., Ferguson, R., Germann, M., Giszczak, A., Glöggler, L.T., Graczykowski, Ł., et al.. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 3029:1(2025). (13th International Workshop on Positron and Positronium Chemistry, PPC 2024 Kanazawa Chamber of Commerce and Industry, jpn 27th October-1st November 2024) [10.1088/1742-6596/3029/1/012002].
Laser Cooling Positronium with Broadband Laser Pulses
Caravita, R.
;Brusa, R. S.;Chehaimi, A.;Ferguson, R.;Guatieri, F.;Mariazzi, S.;Penasa, L.;
2025-01-01
Abstract
The first successful demonstration of broadband laser cooling of positronium (Ps) atoms, obtained within the AEgIS experiment at CERN, is presented here. By employing a custom-designed pulsed alexandrite laser system at 243 nm featuring long-duration pulses of 70 ns and an energy able to saturate the 13S-23P transition over the broad spectrum range of 360 GHz, the temperature of a room-temperature Ps cloud was reduced from 380 K to 170 K in 70 ns. This advancement opens new avenues for precision spectroscopy, antihydrogen production, and fundamental tests with antimatter.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
