Using the X-FEL to photo-pump x-ray laser transitions in He-like Ne

Joseph Nilsen; Nina Rohringer

doi:10.1117/12.893589

4 October 2011 Using the X-FEL to photo-pump x-ray laser transitions in He-like Ne

Joseph Nilsen, Nina Rohringer

Proceedings Volume 8140, X-ray Lasers and Coherent X-ray Sources: Development and Applications IX; 814003 (2011) https://doi.org/10.1117/12.893589
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

Nearly four decades ago H-like and He-like resonantly photo-pumped laser schemes were proposed for producing X-ray lasers. However, demonstrating these schemes in the laboratory has proved to be elusive because of the difficulty of finding a strong resonant pump line. With the advent of the X-ray free electron laser (X-FEL) at the SLAC Linac Coherent Light Source (LCLS) we now have a tunable X-ray laser source that can be used to replace the pump line in previously proposed laser schemes and allow researchers to study the physics and feasibility of resonantly photo-pumped laser schemes. In this paper we use the X-FEL at 1174 eV to photo-pump the singly excited 1s2p state of Helike Ne to the doubly excited 2p3p state and model gain on the 2p3p-2p2s transition at 175 eV and the 2p3p-1s3p transition at 1017 eV. One motivation for studying this scheme is to explore possible quenching of the gain due to strong non-linear coupling effects from the intense X-FEL beam. We compare this scheme with photo-pumping the He-like Ne ground state to the 1s3p singly excited state followed by lasing on the 3p-2s and 3d-2p transitions at 158 and 151 eV. Experiments are being planned at LCLS to study these laser processes and coherent quantum effects.

Citation Download Citation

Joseph Nilsen and Nina Rohringer "Using the X-FEL to photo-pump x-ray laser transitions in He-like Ne", Proc. SPIE 8140, X-ray Lasers and Coherent X-ray Sources: Development and Applications IX, 814003 (4 October 2011); https://doi.org/10.1117/12.893589

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