Pab pawg Free electron Laser ntawm Suav Academy of Sciences tau ua tiav kev tshawb fawb ntawm cov lasers dawb electron sib xws. Raws li Shanghai Soft X-ray Free Electron Laser Facility, lub tshuab tshiab ntawm echo harmonic cascade dawb electron laser uas Tuam Tshoj tau tshaj tawm tau raug txheeb xyuas zoo, thiab cov hluav taws xob mos X-ray coherent nrog kev ua tau zoo heev tau txais. Tsis ntev los no, Cov txiaj ntsig tau luam tawm hauv Optica hauv qab lub npe Coherent thiab ultra-short soft X-ray pulses los ntawm echo-enabled harmonic cascade dawb electron lasers.
Lub tshuab hluav taws xob X-ray dawb yog ib qho ntawm cov teeb pom kev zoo tshaj plaws hauv ntiaj teb. Tam sim no, feem ntau ntawm cov tshuab hluav taws xob X-ray dawb thoob ntiaj teb yog raws li lub tshuab ua kom lub zog loj hlob (SASE), SASE muaj lub teeb ci ntsa iab siab heev thiab femto qib ultra-luv pulse dav thiab lwm yam kev ua tau zoo heev, tab sis SASE kev co los ntawm suab nrov, qhov sib xws thiab kev ruaj khov ntawm nws lub zog hluav taws xob tsis siab, tsis yog X-ray band "laser". Ib qho ntawm cov lus qhia tseem ceeb tshaj plaws hauv kev txhim kho hauv thaj teb ntawm lub tshuab hluav taws xob dawb thoob ntiaj teb yog los tsim cov hluav taws xob X-ray sib xws nrog cov laser zoo, thiab txoj hauv kev tseem ceeb yog siv lub tshuab ua haujlwm laser sab nraud dawb noob. Lub zog hluav taws xob ntawm lub tshuab hluav taws xob dawb noob sab nraud tau txais cov yam ntxwv ntawm lub tshuab hluav taws xob noob, thiab muaj cov yam ntxwv zoo xws li kev sib xws tag nrho, kev tswj hwm theem thiab kev sib dhos meej nrog lub twj tso kua mis sab nraud. Txawm li cas los xij, vim muaj kev txwv ntawm qhov ntev thiab qhov dav ntawm lub tshuab hluav taws xob noob, qhov luv luv wavelength kev pab them nqi thiab qhov ntev ntawm lub tshuab hluav taws xob dawb noob sab nraud raug txwv. Yuav kom nthuav dav ntxiv qhov kev npog luv luv ntawm lub laser hluav taws xob dawb sab nraud, cov qauv ua haujlwm laser dawb electron tshiab xws li echo harmonic tiam tau raug tsim kho kom zoo hauv ntiaj teb hauv xyoo tas los no.
Lub tshuab hluav taws xob laser sab nraud uas tsis muaj noob yog ib txoj hauv kev tseem ceeb los tsim cov tshuab hluav taws xob laser siab hauv Suav teb. Tam sim no, tag nrho plaub lub tshuab hluav taws xob laser siab hauv Suav teb tau siv hom kev ua haujlwm noob sab nraud. Raws li Shanghai Deep Ultraviolet Free electron Laser Facility thiab Shanghai Soft X-ray Free Electron Laser Facility, cov kws tshawb fawb tau ua tiav thawj lub tshuab hluav taws xob laser thoob ntiaj teb uas tsis muaj noob thiab thawj lub tshuab hluav taws xob laser saturation uas tsis muaj noob. Txhawm rau txhawb nqa lub tshuab hluav taws xob laser sab nraud uas tsis muaj noob mus rau qhov luv luv, pab pawg tshawb fawb tau tawm tswv yim tshiab ntawm lub tshuab hluav taws xob laser dawb uas sib xws nrog echo harmonic cascade, uas tau txais yuav los ntawm Shanghai Soft X-ray Free electron Laser device ua lub tswv yim yooj yim, thiab ua tiav tag nrho cov txheej txheem los ntawm kev txheeb xyuas lub hauv paus ntsiab lus mus rau kev ua kom lub teeb loj hauv cov X-ray mos. Cov txiaj ntsig tshawb fawb qhia tau hais tias piv rau cov txheej txheem khiav tawm sab nraud, cov txheej txheem no muaj cov yam ntxwv zoo heev, los ntawm kev siv cov kws tshawb fawb ntawm kev tsim kho ywj pheej ntawm ultrafast X-ray pulse diagnosis technology (https://doi.org/10.1016/j.fmre.2022.01.027), Kev ua tau zoo dua ntawm cov txheej txheem tshiab no hauv kev tswj qhov ntev ntawm lub plawv dhia thiab ultrafast pulse generation tau raug txheeb xyuas ntxiv. Cov txiaj ntsig tshawb fawb cuam tshuam muab txoj hauv kev ua tau zoo rau kev tsim cov lasers electron dawb sib xws hauv subnanometer band, thiab yuav muab cov cuab yeej tshawb fawb zoo tshaj plaws rau cov teb ntawm X-ray nonlinear optics thiab ultrafast physical chemistry.
Lub echo harmonic cascade dawb electron laser muaj kev ua tau zoo heev spectral: daim duab sab laug yog hom cascade ib txwm muaj, thiab daim duab sab xis yog hom echo harmonic cascade.
Kev hloov kho qhov ntev ntawm X-ray pulse thiab ultrafast pulse generation tuaj yeem paub los ntawm echo harmonic cascade
Lub sijhawm tshaj tawm: Lub Kaum Hli-08-2023