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Improvement On A New Concept Of Beamline Delivering High Purity Vuv Photons Starting At 7.3 Ev
No full textWe report recent improvements and performance on the Toroidal Grating Monochromator (TGM) beamline at the Laboratório Nacional de Luz Síncrotron-LNLS. Compared to normal incidence monochromators, (NIMs), TGMs provide substantially wider energy range, less resolving power and very poor higher harmonic rejection (HHR). A new concept, MIRHACLLE [1], developed at LNLS, allows reaching more than five orders of harmonic rejection (NIM gives 10%). Previously, we were not able to reach below 12 eV using MIRHACLLE. Here we report improvements extending the lower limit to 7.3 eV. Furthermore, HHR is maintained down to the lower limit using a special gas mixture, the upper limit given by 330 eV is kept.425PART 12Cavasso Filho, R.L., Homen, M.G.P., Fonseca, P.T., Naves De Brito, A., A synchrotron beamline for delivering high purity vacuum ultraviolet photons (2007) Rev. Sci. Instrum., 78 (11), p. 115104. , 10.1063/1.2813341 0034-6748Craievich, A.F., Rodrigues, A.R., (1998) Hyperfine Interactions, 113 (1-4), p. 465. , 10.1023/A:1012689530867 0304-3834Fonseca, P.T., Pacheco, J.G., Samogin, E.D.A., Castro, A.R.B., (1992) Rev. Sci. Instrum., 63 (1), p. 1256. , 10.1063/1.1143094 0034-6748Fonseca, P.T., (1993), Master ThesisCoutinho, L.H., Cavasso, R.L., Rocha, T.C.R., Homem, M.G.P., Figueira, D.S.L., Fonseca, P.T., Cruz, F.C., Naves De Brito, A., (2004) Phys. Rev. Lett., 93 (18), p. 183001. , 10.1103/PhysRevLett.93.183001 0031-9007Gaie-Levre, F., Garcia, G.A., Schwel, M., Nahon, L., (2011) Phys. Chem. Chem. Phys., 13 (15), pp. 7024-7036. , 10.1039/c0cp02798g 1463-9076Reininger, R., Kriesel, K., Hulbert, S.L., Sánchez-Hanke, C., Arena, D.A., (2008) Rev. Sci. Instrum., 79 (3), p. 033108. , 10.1063/1.2897587 0034-6748http://www.zeiss.com/C1256F2B00321E60/EmbedTdfitelIntern/ MirrorsforSynchrotronRadiation/$File/ Brochure_Synchrotron_mit_References_FINAL.pd
