Itsinda rya Free electron Laser ryo mu Ishuri Rikuru ry’Ubumenyi ry’Abashinwa ryateye imbere mu bushakashatsi ku maraso ya elegitoroniki yuzuye ihuza neza. Hashingiwe ku Kigo cya Shanghai Soft X-ray Free Electron Laser, uburyo bushya bwa echo harmonic cascade free electron laser bwatanzwe n’Ubushinwa bwemejwe neza, kandi imirasire ya X-ray yoroshye ifite imikorere myiza yabonetse. Vuba aha, ibisubizo byasohotse muri Optica mu mutwe ugira uti: Coherent na ultra-short soft X-ray pulses from echo-enabled harmonic cascade free electron lasers.
Lazeri ya X-ray idafite electron ni imwe mu masoko y'urumuri yateye imbere cyane ku isi. Kuri ubu, inyinshi muri lazeri mpuzamahanga zidafite electron zishingiye ku buryo bwo kwiyamamaza (SASE), SASE ifite urumuri rwo hejuru cyane n'ubugari bwa pulse bugufi cyane hamwe n'indi mikorere myiza, ariko SASE ihindagurika bitewe n'urusaku, guhuza no guhagarara kw'imirasire yayo ntabwo ari hejuru, si "lazeri" ya X-ray. Kimwe mu byerekezo by'ingenzi mu iterambere rya lazeri mpuzamahanga zidafite electron ni ugukora imirasire ya X-ray yuzuye hamwe n'ubwiza bwa lazeri busanzwe, kandi uburyo bw'ingenzi ni ugukoresha uburyo bwo gukora bwa lazeri yo hanze idafite electron. Imirasire ya lazeri yo hanze idafite electron iragwa imiterere ya lazeri y'imbuto, kandi ifite imiterere myiza nko guhuza neza, kugenzura icyiciro no guhuza neza na lazeri yo hanze. Ariko, bitewe n'aho uburebure bw'umurambararo n'ubugari bw'umurambararo wa lazeri y'imbuto bugarukira, uburebure bw'umurambararo bugufi n'uburebure bwo guhindura uburebure bw'umurambararo wa lazeri yo hanze idafite electron ni bike. Mu rwego rwo kwagura uburyo bwo gukoresha laser ya electron idafite imbuto mu gihe gito, uburyo bushya bwo gukoresha laser ya electron idafite imbuto nk'uko bigaragazwa n'ikoreshwa rya echo harmonic burimo gutezwa imbere cyane ku isi mu myaka ya vuba aha.
Imashini ya laser ikoresha electron yo hanze ni imwe mu nzira zikomeye zo guteza imbere laser ikoresha electron yo hanze mu Bushinwa. Kuri ubu, ibikoresho bine byose by’ikoranabuhanga byo mu Bushinwa byakoresheje uburyo bwo gukora imbuto zo hanze. Hashingiwe ku Kigo cya Shanghai Deep Ultraviolet Free Electron Laser Facility na Shanghai Soft X-ray Free Electron Laser Facility, abahanga mu bya siyansi batsinze ku buryo bwa mbere mpuzamahanga bwo kongera urumuri rwa laser yo mu bwoko bwa echo type free electron na extreme ultraviolet echo type free electron laser saturation amplification. Kugira ngo barusheho guteza imbere laser yo hanze yo hanze kugeza ku rugero rugufi rw’uburebure, itsinda ry’abashakashatsi ryatanze uburyo bushya bwo gushyiraho laser ikoresha electron yo hanze ifite echo harmonic cascade, yafashwe n’igikoresho cya Shanghai Soft X-ray Free electron Laser nk’uburyo bw’ibanze, kandi barangije igikorwa cyose kuva ku kugenzura ishingiro kugeza ku kongera urumuri muri X-ray yoroshye. Ibisubizo by'ubushakashatsi bigaragaza ko ugereranije n'uburyo busanzwe bwo gukoresha ubwoko bw'imbuto zo hanze, ubu buryo bufite imiterere myiza cyane ya spectral, binyuze mu gukoresha abashakashatsi mu iterambere ryigenga ry'ikoranabuhanga ryo gusuzuma pulse ya X-ray ikora vuba cyane (https://doi.org/10.1016/j.fmre.2022.01.027), imikorere myiza y'ubu buryo bushya mu kugenzura uburebure bw'amagufwa no gukora pulse ikora vuba cyane iragaragazwa. Ibisubizo by'ubushakashatsi bitanga inzira ishoboka yo gukora laser za electron zikora neza mu gice cya subnanometer, kandi bizatanga igikoresho cyiza cy'ubushakashatsi ku bijyanye n'ikoranabuhanga rya X-ray ritari linear na physique ultrafast.
Laser ya echo harmonic cascade free electron ifite imikorere myiza cyane ya spectral: ishusho y'ibumoso ni uburyo busanzwe bwa cascade, naho ishusho y'iburyo ni uburyo bwa echo harmonic cascade.
Guhindura uburebure bw'imitsi ya X-ray no gukora imitsi yihuta cyane bishobora gukorwa hakoreshejwe echo harmonic cascade
Igihe cyo kohereza: Ukwakira-08-2023