Chiedza che ultraviolet chakanyanya kudzokorora

Chiedza che ultraviolet chakanyanya kudzokorora

Maitiro ekushandisa mushure mekudzvanywa pamwe chete neminda ine mavara maviri anogadzira chiedza che ultraviolet chakanyanya kubuda
Kune mashandisirwo eTr-ARPES, kuderedza urefu hwemwenje wekutyaira uye kuwedzera mukana wekuti gas ionization inzira dzinoshanda dzekuwana high flux uye high order harmonics. Mukugadzira high-order harmonics ne single-pass high-repetition frequency, nzira ye frequency doubled kana triple doubled inonyanya kushandiswa kuwedzera kugona kwekugadzira high-order harmonics. Nerubatsiro rwe post-pulse compression, zviri nyore kuwana peak power density inodiwa pakugadzira high-order harmonic nekushandisa shorter pulse drive light, saka kugona kwekugadzira kwakanyanya kunogona kuwanikwa kupfuura kwe long pulse drive.

Monochromator ine grating mbiri inoita kuti pulse forward tilt ive inodzoreredzwa
Kushandiswa kwechinhu chimwe chete chinoparadzanisa mu monochromator kunounza shanduko muchiedzanzira inopenya mumwaranzi we ultra-short pulse, inozivikanwawo se pulse forward tilt, zvichikonzera kutambanudza nguva. Musiyano wenguva yese yenzvimbo ye diffraction ine wavelength ye diffraction λ pa diffraction order m iNmλ, uko N iri huwandu hwese hwemitsetse ye grating yakavhenekerwa. Nekuwedzera chimwe chinhu chechipiri chinopenya, pulse front yakatsveyama inogona kudzorerwa, uye monochromator ine time delay compensation inogona kuwanikwa. Uye nekugadzirisa nzira ye optical pakati pezvikamu zviviri zve monochromator, grating pulse shaper inogona kugadziriswa kuti igadzirise zvakakwana kupararira kwemwaranzi ye high order harmonic. Vachishandisa dhizaini ye time-delay compensation, Lucchini et al. vakaratidza mukana wekugadzira uye kuratidza ultra-short monochromatic extreme ultraviolet pulses ine pulse width ye 5 fs.
Chikwata chekutsvagisa cheCsizmadia paELE-Alps Facility muEuropean Extreme Light Facility chakakwanisa kugadzirisa spectrum nepulse yechiedza cheultraviolet chakanyanya vachishandisa monochromator ine grating double grating time-delay compensation mu high-repetition frequency, high-order harmonic beam line. Vakagadzira higher order harmonics vachishandisa drive.lasernerepetition rate ye100 kHz uye yakawana ultraviolet pulse yakafara zvikuru ye4 fs. Basa iri rinovhura mikana mitsva yekuedza kwakatarwa kwenguva pfupi muchikamu cheELI-ALPS.

Chiedza che "high repetition frequency extreme ultraviolet light source" chakashandiswa zvakanyanya mukudzidza nezve electron dynamics, uye chakaratidza mikana yakawanda yekushandiswa mumunda we attosecond spectroscopy uye microscopic imaging. Nekufambira mberi kuri kuramba kuchienderera mberi uye kuvandudzwa kwesainzi netekinoroji, ultraviolet extreme repetition frequency yakakwira.chiedza chinobvairi kufambira mberi nenzira yekudzokorora kwakawanda, kubuda kwephoton kwakakwira, simba rephoton rakakwira uye upamhi hwekurova kwemoyo hupfupi. Mune ramangwana, kutsvagurudza kunoramba kuripo pamusoro pematurusi emwenje eultraviolet akawandisa kuchasimudzira kushandiswa kwawo mumagetsi emagetsi nedzimwe nzvimbo dzekutsvagurudza. Panguva imwe chete, tekinoroji yekugadzirisa nekudzora yechiedza cheultraviolet chakanyanya kudzokorora uye kushandiswa kwacho mumatekiniki ekuyedza akadai seangular resolution photoelectron spectroscopy ichavewo chinangwa chekutsvagurudza mune ramangwana. Pamusoro pezvo, tekinoroji yeattosecond transient absorption spectroscopy yakagadziriswa nenguva uye tekinoroji yekufungidzira yemicroscopic yenguva chaiyo yakavakirwa pachiedza cheultraviolet chakanyanya kudzokorora inotarisirwawo kudzidzwa zvakanyanya, kugadzirwa uye kushandiswa kuitira kuti pave nemifananidzo yakanyatsogadziriswa yeattosecond time-resolved uye nanospace-resolved mune ramangwana.