X-ray laser-induced ablation of lead compounds

V. Hájková; L. Juha; P. Boháček; T. Burian; J. Chalupský; L. Vyšín; J. Gaudin; P. A. Heimann; S. P. Hau-Riege; M. Jurek; D. Klinger; J. Pelka; R. Sobierajski; J. Krzywinski; M. Messerschmidt; S. P. Moeller; B. Nagler; M. Rowen; W. F. Schlotter; M. L. Swiggers; J. J. Turner; S. M. Vinko; T. Whitcher; J. Wark; M. Matuchová; S. Bajt; H. Chapman; T. Dzelzainis; D. Riley; J. Andreasson; J. Hajdu; B. Iwan; N. Timneanu; K. Saksl; R. Fäustlin; A. Singer; K. Tiedtke; S. Toleikis; I. Vartaniants; H. Wabnitz

doi:10.1117/12.890134

18 May 2011 X-ray laser-induced ablation of lead compounds

V. Hájková, L. Juha, P. Boháček, T. Burian, J. Chalupský, L. Vyšín, J. Gaudin, P. A. Heimann, S. P. Hau-Riege, M. Jurek, D. Klinger, J. Pelka, R. Sobierajski, J. Krzywinski, M. Messerschmidt, S. P. Moeller, B. Nagler, M. Rowen, W. F. Schlotter, M. L. Swiggers, J. J. Turner, S. M. Vinko, T. Whitcher, J. Wark, M. Matuchová, S. Bajt, H. Chapman, T. Dzelzainis, D. Riley, J. Andreasson, J. Hajdu, B. Iwan, N. Timneanu, K. Saksl, R. Fäustlin, A. Singer, K. Tiedtke, S. Toleikis, I. Vartaniants, H. Wabnitz

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Proceedings Volume 8077, Damage to VUV, EUV, and X-ray Optics III; 807718 (2011) https://doi.org/10.1117/12.890134
Event: SPIE Optics + Optoelectronics, 2011, Prague, Czech Republic

Abstract

The recent commissioning of a X-ray free-electron laser triggered an extensive research in the area of X-ray ablation of high-Z, high-density materials. Such compounds should be used to shorten an effective attenuation length for obtaining clean ablation imprints required for the focused beam analysis. Compounds of lead (Z=82) represent the materials of first choice. In this contribution, single-shot ablation thresholds are reported for PbWO₄ and PbI² exposed to ultra-short pulses of extreme ultraviolet radiation and X-rays at FLASH and LCLS facilities, respectively. Interestingly, the threshold reaches only 0.11 mJ/cm2 at 1.55 nm in lead tungstate although a value of 0.4 J/cm² is expected according to the wavelength dependence of an attenuation length and the threshold value determined in the XUV spectral region, i.e., 79 mJ/cm² at a FEL wavelength of 13.5 nm. Mechanisms of ablation processes are discussed to explain this discrepancy. Lead iodide shows at 1.55 nm significantly lower ablation threshold than tungstate although an attenuation length of the radiation is in both materials quite the same. Lower thermal and radiation stability of PbI₂ is responsible for this finding.

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V. Hájková, L. Juha, P. Boháček, T. Burian, J. Chalupský, L. Vyšín, J. Gaudin, P. A. Heimann, S. P. Hau-Riege, M. Jurek, D. Klinger, J. Pelka, R. Sobierajski, J. Krzywinski, M. Messerschmidt, S. P. Moeller, B. Nagler, M. Rowen, W. F. Schlotter, M. L. Swiggers, J. J. Turner, S. M. Vinko, T. Whitcher, J. Wark, M. Matuchová, S. Bajt, H. Chapman, T. Dzelzainis, D. Riley, J. Andreasson, J. Hajdu, B. Iwan, N. Timneanu, K. Saksl, R. Fäustlin, A. Singer, K. Tiedtke, S. Toleikis, I. Vartaniants, and H. Wabnitz "X-ray laser-induced ablation of lead compounds", Proc. SPIE 8077, Damage to VUV, EUV, and X-ray Optics III, 807718 (18 May 2011); https://doi.org/10.1117/12.890134

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