Pre-Excitation Studies for Rubidium-Plasma Generation
M. Aladi, J.S. Bakos, I.F. Barna, A. Czitrovszky, G.P. Djotyan, P., Dombi, D. Dzsotjan, I.B. F\"oldes, G. Hamar, P. N. Ign\'acz, M. Kedves, A., Kerekes, P. L\'evai, I. M\'arton, A. Nagy, D. Oszetzky, M. A. P\'ocsai, P., R\'acz, B. R\'aczkevi, J. Szigeti, Zs. S\"orlei
TL;DR
This paper explores a novel, potentially more efficient method for generating uniform rubidium plasma using resonance-enhanced multi-photon ionization, reducing laser power requirements compared to traditional high-power laser ionization.
Contribution
It presents a theoretical investigation of resonant pre-excitation of rubidium atoms as an alternative plasma generation method for wakefield accelerators.
Findings
Theoretical analysis supports feasibility of REMPI for rubidium plasma generation.
Preliminary experimental work is underway to validate the approach.
Potential reduction in laser power needed for plasma creation.
Abstract
The key element in the Proton-Driven-Plasma-Wake-Field-Accelerator (AWAKE) project is the generation of highly uniform plasma from Rubidium vapor. The standard way to achieve full ionization is to use high power laser which can assure the over-barrier-ionization (OBI) along the 10 meters long active region. The Wigner-team in Budapest is investigating an alternative way of uniform plasma generation. The proposed Resonance Enhanced Multi Photon Ionization (REMPI) scheme probably can be realized by much less laser power. In the following the resonant pre-excitations of the Rb atoms are investigated, theoretically and the status report about the preparatory work on the experiment are presented.
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