Spectroscopy of rare gas clusters using VUV light from a free-electron-laser

FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOWe performed time-of-flight (TOF) spectroscopy on a jet of rare gas clusters using light pulses at λFEL = 32 nm produced by the FLASH VUV freeelectron-laser (Hamburg, Germany) with a maximum peak power density of about 3 × 1013 W/cm2 at the sample. Energy deposition on the clusters was found to be strongly dependent on lambda and much more efficient in the VUV than in the IR and visible spectral range. We observed multiple ionization of rare gas atoms coming from clusters; the latter fragment completely upon absorption of a single pulse. We have also measured high quality photoelectron spectra. Small angle soft X-ray scattering (SAXS) from a single light pulse (λFEL = 32 nm), was recorded with high signal to noise ratio for very large (Natoms 3 × 106) Argon clusters. © 2007 Elsevier B.V. All rights reserved.We performed time-of-flight (TOF) spectroscopy on a jet of rare gas clusters using light pulses at λFEL = 32 nm produced by the FLASH VUV freeelectron-laser (Hamburg, Germany) with a maximum peak power density of about 3 × 1013 W/cm2 at the sample. Energy deposition on the clusters was found to be strongly dependent on lambda and much more efficient in the VUV than in the IR and visible spectral range. We observed multiple ionization of rare gas atoms coming from clusters; the latter fragment completely upon absorption of a single pulse. We have also measured high quality photoelectron spectra. Small angle soft X-ray scattering (SAXS) from a single light pulse (λFEL = 32 nm), was recorded with high signal to noise ratio for very large (Natoms 3 × 106) Argon clusters.We performed time-of-flight (TOF) spectroscopy on a jet of rare gas clusters using light pulses at λFEL = 32 nm produced by the FLASH VUV freeelectron-laser (Hamburg, Germany) with a maximum peak power density of about 3 × 1013 W/cm2 at the sample. Energy deposition on the clusters was found to be strongly dependent on lambda and much more efficient in the VUV than in the IR and visible spectral range. We observed multiple ionization of rare gas atoms coming from clusters; the latter fragment completely upon absorption of a single pulse. We have also measured high quality photoelectron spectra. Small angle soft X-ray scattering (SAXS) from a single light pulse (λFEL = 32 nm), was recorded with high signal to noise ratio for very large (Natoms 3 × 106) Argon clusters.10. International Conference on Electronic Spectroscopy and Structure156/1582529FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOSem informaçãoSaldin, E.L., Schneidmiller, E.A., Yurkov, M.V., (2000) The Physics of Free Electron Lasers, , Springer Verlag, HeidelbergWabnitz, H., Bittner, L., de Castro, A.R.B., Dpehrmann, R., Guertler, P., Laarmann, T., Laasch, W., Yurkov, M., (2002) Nature, 420 (December), pp. 482-492Laarmann, T., de Castro, A.R.B., Gürtler, P., Laasch, W., Schulz, J., Wabnitz, H., Möller, T., (2004) Phys. Rev. Lett., 92. , art 143401Ditmire, T., Tisch, J.W.G., Springate, E., Mason, M.B., Hay, N., Smith, R.A., Marangos, J., Hutchinson, M.H.R., (1997) Nature, 386 (March), pp. 54-56Karnback, R., Joppien, M., Stapelfeldt, J., Wörmer, J., Möller, T., (1993) Rev. Sci. Instrum., 64, pp. 2838-2849Hagena, O.F., (1987) Z. Physik, D4, pp. 291-299Sanchez del Rio, M., Dejus, R.J., (1998) SPIE Proc., 3448Brennan, S., Cowan, P.L., (1992) Rev. Sci. Instrum., 63, pp. 850-853Henke, B.L., Lee, P., Tanaka, T.J., Shimabukuro, R.L., Fujikawa, B.K., (1982) Atomic Data Nucl. Data Tab., 27, pp. 1-144Kroll, N.M., Watson, K.M., (1973) Phys. Rev. A, 8, pp. 804-809Santra, R., Greene, C.H., (2003) Phys. Rev. Lett., 91. , art 233401Siedschlag, C., Rost, J.M., (2004) Phys. Rev. Lett., 93, pp. art 043402Laarmann, T., Rusek, M., Wabnitz, H., Schulz, J., de Castro, A.R.B., Guertler, P., Laasch, W., Moeller, T., (2005) Phys. Rev. Lett., 95, pp. art 063402Jurek, Z., Faigel, G., Tegze, M., (2004) Eur. Phys. J. D, 29, pp. 217-229Ziaja, B., de Castro, A.R.B., Weckert, E., Möller, T., (2006) Eur. Phys. J. D, 40 (3), pp. 465-480Mie, G., (1908) Ann der Physik, 25, pp. 377-445Guinier, A., Fournet, G., (1955) Small Angle Scattering of X-Rays, , J. Wiley and Sons, N. YorkSvergun, D.I., Barberato, C., Koch, M.H.J., (1995) J. Appl. Cryst., 28, pp. 768-773Huldt, G., Szǒke, A., Hajdu, J., (2003) J. Struct. Biol., 144, pp. 219-227Feldhaus, J., Möller, T., Saldin, E.L., Schneidmiller, E.A., Yurkov, M.V., (2003) Nucl. Instrum. Meth., A507, pp. 435-438de Castro, A.R.B., Möller, T., (2005) Nucl. Instrum. Meth., A545, pp. 568-577de Castro, A.R.B., Möller, T., (2005) Rev. Sci. Instrum., 76, pp. art 063104de Castro, A.R.B., Laarmann, T., Schulz, J., Wabnitz, H., Möller, T., (2006) Phys. Rev. A, 74. , art 02740210. International Conference on Electronic Spectroscopy and Structure28 de Agosto a 01 de Setembro de 2006Foz do Iguaçu, PRA.R.B.C. gratefully acknowledges generous support from DESY and the DFG for a 16-month long stay in Hamburg (March 2004–July 2005), during which most of the experiments mentioned here were prepared. He also acknowledges financial help from FAPESP (SP, Brazil) for a shorter stay in Hamburg (January 2006) at the time of some of the measurements