Pab pawg neeg dawb-electron laser ntawm Shanghai Lub Tsev Kawm Ntawv Qib Siab Kev Tshawb Fawb ntawm Suav Academy ntawm Kev Tshawb Fawb tau ua tiav hauv kev tshawb fawb ntawm tag nrho coherent dawb-electron lasers. Raws li Shanghai soft X-ray dawb-electron laser ntaus ntawv, lub tshuab tshiab ntawm ncha-harmonic cascade dawb-electron laser npaj los ntawm Tuam Tshoj tau ua tiav kev txheeb xyuas thiab cov hluav taws xob xoo hluav taws xob sib txuas nrog kev ua haujlwm zoo heev tau txais. Cov txiaj ntsig tau tsis ntev los no tau tshaj tawm hauv Optica hauv qab lub npe Coherent thiab ultra-luv mos X-ray pulses los ntawm ncha-enabled harmonic cascade dawb-electron lasers.
X-ray dawb electron laser yog ib qho ntawm cov teeb pom kev zoo tshaj plaws hauv kev tshawb fawb loj hauv ntiaj teb. Feem ntau ntawm thoob ntiaj teb X-ray dawb electron lasers yog raws li tus kheej-amplifying spontaneous hluav taws xob mechanism (SASE), SASE muaj lub siab ncov brightness thiab femtosecond ultra-luv mem tes dav thiab lwm yam kev ua tau zoo, tab sis SASE los ntawm lub suab nrov vibration. , nws cov hluav taws xob pulse coherence thiab stability tsis siab, tseem tsis tau X-ray band "laser". Ib qho tseem ceeb tshaj plaws thoob ntiaj teb kev loj hlob nyob rau hauv lub teb ntawm dawb electron lasers yog lub cim ntawm tag nrho coherent X-ray hluav taws xob nrog cov pa laser zoo, thiab ib tug tseem ceeb txoj kev ua li no yog siv ib tug lwm noob hom dawb electron laser kev khiav hauj lwm mechanism. Cov hluav taws xob sab nraud ntawm cov noob dawb-electron laser inherits cov yam ntxwv ntawm cov noob laser, nrog cov yam ntxwv zoo heev xws li kev sib koom ua ke tag nrho, kev tswj theem thiab kev sib txuas ncaj qha nrog lub laser sab nraud. Txawm li cas los xij, qhov luv luv wavelength kev pab them nqi thiab mem tes ntev hloov ntau yam ntawm cov noob qoob loo sab nrauv dawb-electron laser txwv los ntawm lub wavelength thiab mem tes dav ntawm cov noob laser. Txhawm rau txuas ntxiv txuas ntxiv qhov luv luv wavelength ntawm cov noob sab nraud hom dawb-electron laser, cov qauv dawb-electron laser ua haujlwm tshiab xws li ncha-harmonic tiam tau tsim muaj zog thoob ntiaj teb hauv xyoo tas los no.
Cov noob sab nrauv hom dawb electron laser yog ib txoj hauv kev tseem ceeb rau kev txhim kho kev nce qib siab dawb electron lasers hauv Suav teb, thiab tam sim no tag nrho plaub qhov kev nce qib siab dawb electron laser hauv Suav teb tau txais kev ua haujlwm sab nrauv. Raws li Shanghai Deep Ultraviolet Free Electron Laser Unit thiab Shanghai Soft X-ray Free Electron Laser Unit, cov kws tshawb fawb tau ua tiav lub ntiaj teb thawj ncha-hom dawb electron laser emission amplification thiab thawj echo-hom dawb electron laser saturation amplification nyob rau hauv huab. ultraviolet band. Txhawm rau txhim kho cov noob sab nrauv yam dawb electron laser rau luv wavelengths, pab pawg tshawb fawb ntawm nws tus kheej tau npaj ib lub tswv yim tshiab ntawm kev sib koom ua ke dawb electron laser nrog echo harmonic cascade, uas tau saws raws li cov tswv yim yooj yim los ntawm Shanghai soft X-ray dawb electron laser. ntaus ntawv, thiab ua tiav tag nrho cov txheej txheem los ntawm cov ntaub ntawv pov thawj ntawm lub hauv paus ntsiab lus mus rau cov mos X-ray band outgoing lub teeb amplification. Cov txiaj ntsig tau pom tias cov txheej txheem tshiab no muaj cov txiaj ntsig zoo tshaj plaws piv rau cov txheej txheem kev ua haujlwm ntawm cov noob-hom kev ua haujlwm, uas tau lees paub ntxiv raws li kev tswj hwm lub sijhawm ntev ntawm lub plawv dhia thiab lub sijhawm ua haujlwm ntawm cov mem tes ultrafast los ntawm kev siv cov kws tshawb fawb 'tus kheej tsim ultrafast X-ray pulse. Diagnostic technique (https://doi.org/10.1016/j.fmre.2022.01.027). Qhov kev ua tau zoo tshaj plaws ntawm cov txheej txheem tshiab no hais txog kev tswj lub sijhawm ntev ntawm cov mem tes thiab cov cim mem tes ultrafast tau raug nthuav tawm ntxiv los ntawm kev siv ultrafast X-ray pulse diagnostic txheej txheem tsim hauv tsev. Cov txiaj ntsig kev tshawb fawb muab txoj hauv kev los tsim kom muaj kev sib koom ua ke dawb-electron lasers ntawm sub-nanometer wavelengths thiab yuav muab cov cuab yeej tshawb fawb zoo tshaj plaws rau thaj chaw ntawm X-ray nonlinear optics thiab ultrafast physicochemistry.
Ob lub Italian FERMI-FEL kev teeb tsa thiab SwissFEL kev teeb tsa hauv Switzerland tam sim no tab tom thov cov phiaj xwm txhawm rau txhim kho lawv cov hluav taws xob ua haujlwm siv cov txheej txheem tshiab no. Cov haujlwm tshawb fawb tau txhawb nqa los ntawm National Key Research thiab Development Program ntawm Tuam Tshoj, National Excellent Youth Fund Program, National Natural Science Foundation ntawm Tuam Tshoj thiab Shanghai Talent Program.
Echo-harmonic cascade dawb-electron laser nrog zoo spectral kev ua tau zoo: cov pa cascade hom ntawm sab laug, echo-harmonic cascade hom ntawm sab xis.
Echo harmonic cascade rau X-ray pulse length adjustment thiab ultrafast mem tes tiam.
