High zaus heev ultraviolet lub teeb qhov chaw

High zaus heev ultraviolet lub teeb qhov chaw

Cov txheej txheem tom qab-compression ua ke nrog ob-xim teb ua rau lub siab-flux huab ultraviolet lub teeb qhov chaw
Rau Tr-ARPES daim ntawv thov, txo lub wavelength ntawm lub teeb tsav tsheb thiab ua rau kom cov roj ionization muaj txiaj ntsig txhais tau tias kom tau txais cov flux siab thiab siab sib haum xeeb. Nyob rau hauv tus txheej txheem ntawm generating high-order harmonics nrog ib zaug-pass high-repetition zaus, zaus ob npaug los yog triple doubling txoj kev yog yeej saws los ua kom cov efficiency ntawm high-order harmonics. Nrog kev pab los ntawm post-pulse compression, nws yog ib qho yooj yim mus cuag lub ncov hwj chim ceev uas yuav tsum tau rau siab txiav txim siab harmonic tiam los ntawm kev siv ib tug luv luv mem tes tsav lub teeb, yog li ntawd ntau lawm efficiency yuav tau ntau dua li ntawm ib tug ntev mem tes tsav.

Ob chav grating monochromator ua tiav mem tes rau pem hauv ntej qaij nyiaj
Kev siv ib qho diffractive caij hauv monochromator qhia txog kev hloov pauv hauvkho qhov muagtxoj kev radially nyob rau hauv lub beam ntawm ib tug ultra-luv mem tes, tseem hu ua ib tug mem tes rau pem hauv ntej qaij, ua rau lub sij hawm ncab. Tag nrho lub sij hawm sib txawv rau qhov chaw diffraction nrog lub diffraction wavelength λ ntawm qhov kev txiav txim diffraction m yog Nmλ, qhov twg N yog tag nrho cov illuminated grating kab. Los ntawm kev ntxiv qhov thib ob diffractive caij, lub tilted mem tes pem hauv ntej tuaj yeem rov qab tau, thiab lub monochromator nrog lub sijhawm ncua sijhawm tuaj yeem tau txais. Thiab los ntawm kev kho qhov muag pom kev ntawm ob lub monochromator Cheebtsam, lub grating pulse shaper tuaj yeem hloov kho kom haum rau qhov sib txawv ntawm qhov sib txawv ntawm qhov kev txiav txim siab sib haum xeeb. Siv lub sij hawm ncua sij hawm them nqi tsim, Lucchini li al. qhia tau tias muaj peev xwm tsim thiab ua tus yam ntxwv ntawm ultra-luv monochromatic huab ultraviolet pulses nrog lub mem tes dav ntawm 5 fs.
Pab pawg tshawb fawb Csizmadia ntawm ELE-Alps Facility hauv European Extreme Light Facility tau ua tiav cov spectrum thiab pulse modulation ntawm ultraviolet lub teeb uas siv ob npaug grating lub sij hawm ncua sij hawm them nyiaj monochromator nyob rau hauv high-repetition zaus, high-order harmonic beam kab. Lawv tsim cov kev txiav txim siab dua qub uas siv lub tsavlasernrog rau qhov rov ua dua ntawm 100 kHz thiab ua tiav qhov dav ultraviolet mem tes dav ntawm 4 fs. Qhov kev ua haujlwm no qhib qhov muaj peev xwm tshiab rau kev sim daws lub sijhawm hauv qhov chaw kuaj pom hauv ELI-ALPS qhov chaw.

High repetition zaus heev ultraviolet lub teeb qhov chaw tau dav siv nyob rau hauv txoj kev kawm ntawm electron dynamics, thiab tau qhia dav daim ntawv thov kev cia siab nyob rau hauv lub teb ntawm attosecond spectroscopy thiab microscopic imaging. Nrog kev nce qib txuas ntxiv thiab kev tsim kho tshiab ntawm kev tshawb fawb thiab thev naus laus zis, qhov kev rov ua haujlwm siab ntau zaus ultravioletqhov kajyog nce nyob rau hauv cov kev taw qhia ntawm ntau dua repetition zaus, siab dua photon flux, siab zog photon thiab luv luv mem tes dav. Nyob rau hauv lub neej yav tom ntej, kev tshawb fawb txuas ntxiv ntawm qhov kev rov ua dua ntau zaus huab cua ultraviolet lub teeb yuav txuas ntxiv txhawb lawv cov ntawv thov hauv hluav taws xob thiab lwm yam kev tshawb fawb. Nyob rau tib lub sijhawm, kev ua kom zoo dua qub thiab tswj kev siv thev naus laus zis ntawm kev rov ua dua ntau zaus huab ultraviolet lub teeb qhov chaw thiab nws daim ntawv thov hauv kev sim cov tswv yim xws li angular daws teeb meem photoelectron spectroscopy kuj tseem yog qhov tseem ceeb ntawm kev tshawb fawb yav tom ntej. Tsis tas li ntawd, lub sij hawm daws teeb meem attosecond transient absorption spectroscopy technology thiab real-time microscopic imaging technology raws li repetition zaus zaus heev ultraviolet lub teeb qhov chaw tseem yuav tsum tau kawm ntxiv, tsim thiab siv nyob rau hauv thiaj li yuav ua tau high-precision attosecond lub sij hawm daws teeb meem. thiab nanospace daws teeb meem duab yav tom ntej.