Ua holomua ka noiʻi ʻana i ka laser electron manuahi piha piha

Ua holomua ka hui Free electron Laser o ka Chinese Academy of Sciences i ka noiʻi ʻana i nā lasers electron manuahi piha. Ma muli o ka Shanghai Soft X-ray Free Electron Laser Facility, ua hōʻoia pono ʻia ke ʻano hana hou o ka echo harmonic cascade free electron laser i hāpai ʻia e Kina, a ua loaʻa ka radiation coherent X-ray palupalu me ka hana maikaʻi loa. I kēia manawa, ua paʻi ʻia nā hopena ma Optica ma lalo o ke poʻo inoa ʻo Coherent and ultra-short soft X-ray pulses from echo-enabled harmonic cascade free electron lasers.

ʻO ka laser electron manuahi X-ray kekahi o nā kumu kukui holomua loa o ka honua. I kēia manawa, ʻo ka hapa nui o nā lasers electron manuahi X-ray honua e pili ana i ka ʻano hana hoʻokuʻu kūʻokoʻa ponoʻī (SASE), he kiʻekiʻe loa ka ʻōlinolino kiʻekiʻe o SASE a me ka laulā pulse ultra-short pae femto a me nā hana maikaʻi ʻē aʻe, akā ʻo ka haʻalulu SASE ma o ka walaʻau, ʻaʻole kiʻekiʻe ke kūlike a me ke kūpaʻa o kāna pulse radiation, ʻaʻole ia he "laser" X-ray band. ʻO kekahi o nā kuhikuhi hoʻomohala koʻikoʻi ma ke kahua o ka laser electron manuahi honua, ʻo ia ka hoʻoulu ʻana i ka radiation X-ray piha piha me ka maikaʻi laser maʻamau, a ʻo ke ala nui ka hoʻohana ʻana i ka ʻano hana laser electron manuahi hua waho. Hoʻoilina ka radiation o ka laser electron manuahi hua waho i nā ʻano o ka laser hua, a he mau ʻano maikaʻi loa e like me ke kūlike piha, ka mana pae a me ka hoʻonohonoho pololei me ka laser pamu waho. Eia naʻe, ma muli o ka palena o ka nalu a me ka laulā pulse o ka laser hua, ua palena ka uhi nalu pōkole a me ka laulā hoʻoponopono lōʻihi pulse o ka laser electron manuahi hua waho. I mea e hoʻonui hou aku ai i ka uhi ʻana o ka nalu pōkole o ka laser electron manuahi o waho, ke hoʻomohala ikaika ʻia nei nā ʻano hana laser electron manuahi hou e like me ka hanauna harmonic echo i ka honua i nā makahiki i hala iho nei.

ʻO ka laser electron manuahi hua waho kekahi o nā ala loea nui e hoʻomohala ai i ka laser electron manuahi loaʻa kiʻekiʻe ma Kina. I kēia manawa, ua hoʻohana nā mea hana laser electron manuahi loaʻa kiʻekiʻe ʻehā ma Kina i ke ʻano hana hua waho. Ma muli o ka Shanghai Deep Ultraviolet Free electron Laser Facility a me ka Shanghai Soft X-ray Free Electron Laser Facility, ua hoʻokō mau nā kānaka ʻepekema i ka hoʻonui ʻana i ke kukui laser electron manuahi ʻano echo honua mua a me ka hoʻonui ʻana i ka saturation laser electron manuahi ʻano echo ultraviolet mua loa. I mea e hoʻolaha hou aku ai i ka laser electron manuahi hua waho i ka nalu pōkole, ua hāpai kūʻokoʻa ka hui noiʻi i kahi ʻano hana hou o ka laser electron manuahi piha me ka cascade harmonic echo, i lawe ʻia e ka mea hana Laser electron manuahi Shanghai Soft X-ray ma ke ʻano he papahana kumu, a hoʻopau i ke kaʻina holoʻokoʻa mai ka hōʻoia kumu a hiki i ka hoʻonui ʻana i ke kukui ma ka hui X-ray palupalu. Hōʻike nā hopena noiʻi i ka hoʻohālikelike ʻia me ke ʻano holo ʻano hua waho kuʻuna, he ʻano spectral maikaʻi loa kēia ʻano, ma o ka hoʻohana ʻana o nā mea noiʻi o ka hoʻomohala kūʻokoʻa o ka ʻenehana ʻike pulse X-ray ultrafast (https://doi.org/10.1016/j.fmre.2022.01.027), Ua hōʻoia hou ʻia ka hana kiʻekiʻe o kēia ʻano hou i ka kaohi ʻana i ka lōʻihi o ka pulse a me ka hanauna pulse ultrafast. Hāʻawi nā hopena noiʻi pili i kahi ala loea kūpono no ka hana ʻana o nā lasers electron manuahi piha piha i ka hui subnanometer, a e hāʻawi i kahi mea hana noiʻi kūpono no nā kahua o nā optics nonlinear X-ray a me ka kemika kino ultrafast.

Loaʻa i ka laser electron manuahi echo harmonic cascade ka hana spectral maikaʻi loa: ʻo ke kiʻi hema ke ʻano cascade maʻamau, a ʻo ke kiʻi ʻākau ke ʻano cascade echo harmonic

Hiki ke hoʻokō ʻia ka hoʻoponopono ʻana i ka lōʻihi o ka pulse X-ray a me ka hanauna pulse ultrafast e ka echo harmonic cascade