Babban maimaita matsananci hasken ultraviolet

Babban maimaita matsananci hasken ultraviolet

Dabarun matsawa da aka haɗa tare da filayen launi biyu suna samar da babban madaidaicin hasken ultraviolet.
Don aikace-aikacen Tr-ARPES, rage tsawon tsayin hasken tuƙi da haɓaka yuwuwar iskar gas suna da ingantattun hanyoyi don samun babban juzu'i da babban tsari masu jituwa. A cikin aiwatar da samar da babban oda mai jituwa tare da mitar maimaituwa-wuri ɗaya, ana amfani da mitar ninki biyu ko sau uku a asali don ƙara haɓakar samar da ingantaccen tsarin jituwa. Tare da taimakon matsawa bayan bugun jini, yana da sauƙi don cimma ƙimar ƙarfin kololuwar da ake buƙata don tsararrun tsararru masu jituwa ta amfani da ɗan gajeren haske na bugun bugun jini, don haka ana iya samun ingantaccen samarwa fiye da na injin bugun bugun jini.

Guda biyu grating monochromator ya cimma diyya na karkatar da bugun jini gaba
Yin amfani da nau'i mai banƙyama guda ɗaya a cikin monochromator yana gabatar da canji a cikina ganihanya radially a cikin katako na matsananci-gajeren bugun jini, wanda kuma aka sani da karkatar bugun bugun gaba, yana haifar da mikewa lokaci. Bambancin lokaci don tabo mai banƙyama tare da diffraction wavelength λ a odar diffraction m shine Nmλ, inda N shine jimlar adadin layukan grating mai haske. Ta ƙara kashi na biyu mai banƙyama, za'a iya dawo da gaban bugun jini mai karkata, kuma ana iya samun monochromator tare da diyya na jinkirin lokaci. Kuma ta hanyar daidaita hanyar gani tsakanin nau'ikan monochrome guda biyu, za'a iya daidaita ma'aunin bugun jini na grating don daidaitaccen rarrabuwar kawuna na babban oda masu jituwa. Yin amfani da ƙirar ramuwa na jinkirta lokaci, Lucchini et al. ya nuna yuwuwar ƙirƙira da halayyar ultra-short monochromatic matsananci ultraviolet bugun jini tare da bugun bugun jini na 5 fs.
Teamungiyar Bincike ta CSIIZMADIA a cikin wuraren da za a yi wa Ele-Alps a cikin matsanancin haske na Monselet na Monochromator ta sau biyu na maimaitawa, high-odar jituwa layin katako. Sun samar da mafi girman tsari masu jituwa ta amfani da tuƙiLasertare da yawan maimaitawa na 100 kHz kuma ya sami matsananciyar ultraviolet bugun bugun jini na 4 fs. Wannan aikin yana buɗe sabbin damar don gwaje-gwajen da aka warware lokaci a cikin gano wuri a cikin kayan aikin ELI-ALPS.

An yi amfani da babban mitar matsanancin hasken ultraviolet sosai a cikin nazarin ƙarfin lantarki, kuma ya nuna fa'idodin aikace-aikace a fagen kallon kallo na attosecond da na gani na gani. Tare da ci gaba da ci gaba da haɓakar kimiyya da fasaha, babban maimaituwa matsananci ultraviolettushen haskeyana ci gaba zuwa mafi girman mitar maimaituwa, haɓakar photon mafi girma, ƙarfin photon mafi girma da guntuwar bugun bugun jini. A nan gaba, ci gaba da bincike kan yawan maimaitawa matsananci hasken ultraviolet zai ƙara haɓaka aikace-aikacen su a cikin ƙarfin lantarki da sauran wuraren bincike. A lokaci guda, haɓakawa da fasaha na sarrafa babban maimaitawa matsananci hasken ultraviolet da aikace-aikacensa a cikin dabarun gwaji irin su ƙudurin hangen nesa na angular photoelectron spectroscopy shima zai zama abin da aka fi mayar da hankali kan bincike na gaba. Bugu da kari, ana sa ran za a ƙara yin nazari, haɓakawa da kuma amfani da fasahar ɗaukar hoto na wucin gadi na lokaci-lokaci da fasahar hoto ta zahiri da ta dogara da babban maimaitawa matsananci hasken ultraviolet. da nanospace-sauwar hoto a nan gaba.