Iqela leLaser ye-electron yaSimahla yeAkhademi yaseTshayina yeSayensi lenze inkqubela kuphando lweelaser ze-electron zasimahla ezihambelana ngokupheleleyo. Ngokusekwe kwi-Shanghai Soft X-ray ye-Electron Laser Facility yasimahla, indlela entsha ye-echo harmonic cascade yasimahla ye-electron laser ecetywe yi-China iqinisekisiwe ngempumelelo, kunye nemitha ye-X-reyi ehambelanayo esebenza kakuhle ifunyenwe. Kutshanje, Iziphumo zipapashwe kwi-Optica phantsi kwesihloko esithi Coherent and Ultra-short soft soft X-ray pulses from echo-enabled harmonic cascade free electron lasers.
I-X-ray yasimahla ye-electron laser yenye yemithombo yokukhanya ephucukileyo ehlabathini. Okwangoku, uninzi lwee-leser ze-electron zamazwe ngamazwe ze-X-ray zisekwe kumatshini wokuzikhulisa ozenzekelayo (i-SASE), i-SASE inokukhanya okuphezulu kakhulu kunye nenqanaba le-femto le-ultra-short pulse ububanzi kunye nokunye ukusebenza okugqwesileyo, kodwa i-SASE vibration ngengxolo, ukuhambelana kunye nokuzinza kwe-pulse yayo ye-radiation ayiphezulu, ayikho i-Xlaser band. Olona lwalathiso lubalulekileyo lophuhliso kummandla welaser ye-electron yamazwe ngamazwe esimahla kukuvelisa imitha ye-X-reyi ehambelana ngokupheleleyo nomgangatho welaser eqhelekileyo, kwaye indlela ebalulekileyo kukusebenzisa inkqubo yokusebenza ye-electron laser laser yembewu yangaphandle. Imitha yembewu yangaphandle ye-electron laser yangaphandle izuza njengelifa iimpawu ze-laser yembewu, kwaye ineempawu ezibalaseleyo ezifana nokuhambelana okupheleleyo, ulawulo lwesigaba kunye nongqamaniso oluchanekileyo kunye ne-laser pump yangaphandle. Nangona kunjalo, ngenxa yokuthintelwa kobude bobude kunye nobubanzi be-pulse ye-laser yembewu, ukugqunywa kobude obufutshane be-wavelength kunye noluhlu lohlengahlengiso lobude bembewu yangaphandle ye-electron ye-electron yasimahla ilinganiselwe. Ukuze kwandiswe ngakumbi ubude obufutshane be-electron yembewu yangaphandle ye-electron laser, iindlela ezintsha zokusebenza ze-electron laser zasimahla ezifana ne-echo harmonic generation ziphuhliswa ngamandla kwihlabathi kwiminyaka yakutshanje.
Imbewu yangaphandle ye-electron laser laser yenye yeendlela eziphambili zobugcisa zokuphuhlisa inzuzo ephezulu yasimahla yelaser ye-electron eTshayina. Okwangoku, zonke izixhobo ezine eziphezulu ze-electron laser laser eTshayina zamkele indlela yokusebenza kwembewu yangaphandle. Ngokusekwe kwi-Shanghai Deep Ultraviolet yasimahla ye-electron Laser Facility kunye ne-Shanghai Soft X-ray yaMahala yeLaser Laser Facility, izazinzulu ziphumelele ngokulandelelanayo udidi lokuqala lwe-echo lwamazwe ngamazwe lokukhulisa ukukhanya kwe-electron laser kunye neyokuqala egqithisileyo ye-ultraviolet echo uhlobo lwasimahla lwe-electron laser saturation. Ukuze kukhuthazwe ngakumbi imbewu yangaphandle ye-electron ye-electron laser ukuya kubude obufutshane, iqela lophando licebise ngokuzimeleyo indlela entsha ehambelana ngokupheleleyo ye-electron laser laser ene-echo harmonic cascade, eyamkelwa sisixhobo seLaser ye-electron ye-Shanghai Soft X-ray njengesikimu esisisiseko, kwaye yagqiba yonke inkqubo ukusuka kumgaqo-siseko wokuqinisekisa ukukhulisa ukukhanya kwibhendi ye-X-reyi ethambileyo. Iziphumo zophando zibonisa ukuba xa kuthelekiswa nohlobo lwembewu lwangaphandle olusebenzayo, lo matshini uneempawu ezibalaseleyo zembonakalo, ngokwamkelwa kwabaphandi bophuhliso oluzimeleyo lwe-ultrafast X-ray pulse diagnosis technology (https://doi.org/10.1016/j.fmre.2022.01.027), Ukusebenza okugqwesileyo kolu luhlu lutsha lokulawula ubude kunye ne-pulse ye-pulse ephezulu. Iziphumo zophando ezifanelekileyo zibonelela ngendlela yobugcisa enokwenzeka yokuvelisa i-lasers ye-electron yasimahla ehambelana ngokupheleleyo kwibhendi ye-subnanometer, kwaye iya kubonelela ngesixhobo esifanelekileyo sophando kwiinkalo ze-X-ray optics nonlinear kunye ne-ultrafast physical chemistry.
I-echo harmonic cascade yasimahla ye-electron laser inokusebenza okubalaseleyo: umfanekiso osekhohlo yimowudi yesiqhelo ye-cascade, kwaye umfanekiso osekunene yimowudi ye-echo harmonic
Uhlengahlengiso lobude be-X-ray pulse kunye ne-ultrafast pulse generation inokuqondwa nge-echo harmonic cascade.
Ixesha lokuposa: Oct-08-2023