Kwenziwe inqubekelaphambili ocwaningweni lwelaser yamahhala ye-electron ehambisana ngokugcwele

Ithimba lamahhala le-electron Laser le-Chinese Academy of Sciences lenze inqubekelaphambili ocwaningweni lwamalaza e-electron amahhala ahambisana ngokugcwele. Ngokusekelwe ku-Shanghai Soft X-ray Free Electron Laser Facility, indlela entsha ye-echo harmonic cascade free electron laser ehlongozwa yi-China iqinisekiswe ngempumelelo, futhi kutholwe imisebe ethambile ye-X-ray esebenza kahle kakhulu. Muva nje, Imiphumela ishicilelwe ku-Optica ngaphansi kwesihloko esithi Coherent and ultra-short soft soft X-rays kusuka kuma-harmonic cascade free electron lasers anikwe amandla yi-echo.

I-X-ray free electron laser ingenye yemithombo yokukhanya ethuthuke kakhulu emhlabeni. Njengamanje, iningi lama-leser angama-electron amahhala e-X-ray asekelwe kumshini ozikhulisayo ozenzakalelayo (SASE), i-SASE inokukhanya okuphezulu kakhulu kanye nezinga le-femto i-ultra-short pulse ububanzi nokunye ukusebenza okuhle kakhulu, kodwa ukudlidliza kwe-SASE. ngomsindo, ukuhambisana nokuzinza kwe-pulse yayo emisebeni akuphakeme, akuyona i-X-ray band "laser". Enye yezikhombisi-ndlela ezibaluleke kakhulu zokuthuthukiswa emkhakheni we-electron free laser laser yamazwe ngamazwe ukukhiqiza imisebe ye-X-ray ehambisana ngokugcwele nekhwalithi ye-laser evamile, futhi indlela ebalulekile ukusebenzisa indlela yokusebenza ye-electron yamahhala ye-electron yangaphandle. Imisebe ye-laser ye-electron yangaphandle engenambewu izuza njengefa izici ze-laser yembewu, futhi inezici ezinhle kakhulu njengokuhlangana okugcwele, ukulawulwa kwesigaba nokuvumelanisa okunembayo ne-laser yepompo yangaphandle. Kodwa-ke, ngenxa yokunqunyelwa kobude begagasi nobubanzi be-pulse be-laser yembewu, ukumbozwa kwe-wavelength emfishane kanye nohlu lokulungiswa kobude be-pulse le-laser ye-electron yamahhala yembewu yangaphandle kunqunyelwe. Ukuze kuthuthukiswe ukumbozwa kobude obufushane be-wavelength ye-laser ye-electron yamahhala yangaphandle, izindlela ezintsha zokusebenza ze-electron laser zamahhala ezifana ne-echo harmonic generation zithuthukiswa ngamandla emhlabeni eminyakeni yamuva nje.

I-laser ye-electron yamahhala yangaphandle ingenye yezindlela zobuchwepheshe eziyinhloko zokuthuthukisa i-electron laser laser yamahhala ezuza kakhulu e-China. Njengamanje, wonke amadivaysi amane e-electron laser laser azuza kakhulu e-China asebenzise imodi yokusebenza yembewu yangaphandle. Ngokusekelwe ku-Shanghai Deep Ultraviolet Free electron Laser Facility kanye ne-Shanghai Soft X-ray Free Electron Laser Facility, ososayensi bazuze ngokulandelana ukukhulisa ukukhanya kwamahhala kwe-electron laser yohlobo lwamazwe ngamazwe kanye nohlobo lokuqala oludlulele lwe-ultraviolet echo uhlobo lwamahhala lwe-electron laser saturation amplification. Ukuze kuqhutshekwe kuthuthukiswe i-laser ye-electron yangaphandle engenambewu ibe ubude begagasi obufushane, ithimba labacwaningi ngokuzimela liphakamise indlela entsha ye-electron yamahhala ehambisana ngokugcwele ne-echo harmonic cascade, eyamukelwa idivayisi ye-Shanghai Soft X-ray Free electron Laser njenge uhlelo oluyisisekelo, futhi yaqeda yonke inqubo kusukela ekuqinisekiseni isimiso kuya ekwandiseni ukukhanya ebhendini ye-X-ray ethambile. Imiphumela yocwaningo ikhombisa ukuthi uma kuqhathaniswa nendlela yokugijima yohlobo lwembewu yangaphandle yendabuko, le mishini inezici ezinhle kakhulu ze-spectral, ngokwamukelwa kwabacwaningi bokuthuthukiswa okuzimele kobuchwepheshe bokuxilongwa kwe-X-ray pulse ultrafast (https://doi.org/10.1016 /j.fmre.2022.01.027), Ukusebenza okuphezulu kwale ndlela entsha ekulawuleni ubude be-pulse kanye nokukhiqizwa kwe-pulse okusheshayo kuqinisekiswa futhi. Imiphumela yocwaningo efanele ihlinzeka ngomzila wobuchwepheshe onokwenzeka wokukhiqiza ama-laser amahhala e-electron ahambisana ngokugcwele ebhendini ye-subnanometer, futhi izohlinzeka ngethuluzi elikahle lokucwaninga emikhakheni ye-X-ray ye-nonlinear optics kanye nekhemistri yemvelo esheshayo.

I-echo harmonic cascade yamahhala ye-electron laser inokusebenza okuhle kakhulu kwe-spectral: isithombe esingakwesokunxele imodi ye-cascade evamile, futhi isithombe esifanele imodi ye-echo harmonic cascade.

Ukulungiswa kobude be-X-ray pulse kanye ne-ultrafast pulse generation kungenziwa nge-echo harmonic cascade.