Umthombo wokukhanya okuphezulu kakhulu kwe-ultraviolet
Iindlela zokusebenzisa emva koxinzelelo ezidityaniswe namabala anemibala emibini zivelisa umthombo wokukhanya we-ultraviolet ophuma kakhulu
Kwizicelo ze-Tr-ARPES, ukunciphisa ubude bomda wokukhanya okuqhubayo kunye nokwandisa amathuba e-ionization yegesi ziyindlela esebenzayo yokufumana i-high flux kunye ne-high order harmonics. Kwinkqubo yokuvelisa i-high-order harmonics nge-single-pass high-repetition frequency, indlela ye-frequency doubling okanye ye-triple doubling ngokusisiseko iyasetyenziswa ukwandisa ukusebenza kakuhle kwemveliso ye-high-order harmonics. Ngoncedo lwe-post-pulse compression, kulula ukufikelela kwi-peak power density efunekayo kwi-high order harmonic light ngokusebenzisa i-short pulse drive light, ukuze kubekho ukusebenza okuphezulu kwemveliso kunokufunyanwa kwi-long pulse drive.
I-monochromator ene-grating ephindwe kabini ifezekisa imbuyekezo yokuthambekela kwe-pulse forward
Ukusetyenziswa kwento enye edibanisa izinto kwi-monochromator kwazisa utshintsho kwii-opticalindlela ejikeleza ngokukhawuleza kumqadi we-ultra-short pulse, eyaziwa ngokuba yi-pulse forward tilt, nto leyo ebangela ukolulwa kwexesha. Umahluko wexesha elipheleleyo kwindawo ye-diffraction ene-diffraction wavelength λ kumyalelo we-diffraction m yi-Nmλ, apho i-N linani lilonke lemigca ye-grating ekhanyisiweyo. Ngokongeza into yesibini ye-diffractive, i-tilted pulse front inokubuyiselwa, kwaye i-monochromator ene-time delay consolidation inokufunyanwa. Kwaye ngokulungelelanisa indlela ye-optical phakathi kwezixhobo ezimbini ze-monochromator, i-grating pulse shaper inokwenziwa ngokwezifiso ukuze ihlawule ngokuchanekileyo ukusasazeka kwe-inherent ye-high order harmonic radiation. Besebenzisa uyilo lwe-time-delay consolidation, uLucchini et al. babonise ukuba kunokwenzeka ukuvelisa nokuchonga ii-ultraviolet pulses ze-ultra-short monochromatic extreme ultraviolet ezinobubanzi be-pulse obuyi-5 fs.
Iqela lophando leCsizmadia kwi-ELE-Alps Facility kwi-European Extreme Light Facility lifikelele kwi-spectrum kunye ne-pulse modulation yokukhanya okugqithisileyo kwe-ultraviolet lisebenzisa i-double grating time-delay compensation monochromator kumgca we-harmonic beam ophindaphindayo kakhulu, olandelelanayo kakhulu. Bavelise ii-harmonics eziphezulu besebenzisa i-drive.ilezangesantya sokuphindaphindwa kwe-100 kHz kwaye ifikelele kububanzi obugqithisileyo be-ultraviolet pulse ye-4 fs. Lo msebenzi uvula amathuba amatsha ovavanyo olusonjululwe ngexesha lokufunyanwa kwindawo ethile kwiziko le-ELI-ALPS.
Umthombo wokukhanya we-ultraviolet ophindaphindayo ophezulu usetyenziswe kakhulu kuphononongo lwe-electron dynamics, kwaye ubonise amathuba amaninzi okusetyenziswa kwicandelo le-attosecond spectroscopy kunye ne-microscopic imaging. Ngenkqubela phambili eqhubekayo kunye nobuchule besayensi kunye nobuchwepheshe, i-ultraviolet ephindaphindayo ephezulu kakhuluumthombo wokukhanyaiqhubela phambili kwicala lokuphindaphinda okuphezulu, i-photon flux ephezulu, amandla aphezulu e-photon kunye nobubanzi obufutshane be-pulse. Kwixesha elizayo, uphando oluqhubekayo kwimithombo yokukhanya ye-ultraviolet ephezulu ephindaphindayo luya kukhuthaza ukusetyenziswa kwayo kwi-electronic dynamics nakwezinye iindawo zophando. Kwangaxeshanye, itekhnoloji yokwenza ngcono kunye nokulawula umthombo wokukhanya we-ultraviolet ephezulu ephindaphindayo kunye nokusetyenziswa kwayo kwiindlela zovavanyo ezifana ne-angular resolution photoelectron spectroscopy nayo iya kuba yeyona nto iphambili kuphando lwexesha elizayo. Ukongeza, itekhnoloji ye-attosecond transient absorption spectroscopy exazululwe ngexesha kunye netekhnoloji ye-microscopic imaging yexesha langempela esekelwe kumthombo wokukhanya we-ultraviolet ephezulu ephindaphindayo kulindeleke ukuba ifundwe ngakumbi, iphuhliswe kwaye isetyenziswe ukuze kufezekiswe umfanekiso we-attosecond time-resolved kunye ne-nanospace-resolved kwixesha elizayo.
Ixesha lokuthumela: Epreli-30-2024