Optical-field-ionization collisional-excitation soft x-ray lasers in clustered gas jets were experimentally investigated in detail. A tomographic measurement based on laser machining technique was used to resolve the growth of x-ray lasing intensity as a function of position in a cluster jet, exploring the origins of the dependences of x-ray lasing intensity on atom density and laser polarization. The presence of optimal atom density was found to be a result of ionizationinduced refraction. An unexpected observation is that circular polarization appears to be not the optimal polarization ellipticity, which may be a manifestation of effects of pre-ionization at the laser-cluster ionization front.
CITATION STYLE
Chou, M.-C., Lin, P.-H., Hung, T.-S., Lin, J.-Y., Wang, J., & Chen, S.-Y. (2008). Experimental Investigation of the Parameter Space of Optical-Field-Ionization Collisional-Excitation X-Ray Lasers in a Cluster Jet. In X-Ray Lasers 2006 (pp. 245–250). Springer Netherlands. https://doi.org/10.1007/978-1-4020-6018-2_29
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