Isoko ry'urumuri rwa ultraviolet rukabije rwongera inshuro nyinshi

Isoko ry'urumuri rwa ultraviolet rukabije rwongera inshuro nyinshi

Uburyo bwo gukanda buvanze n'amabara abiri butanga urumuri rwinshi ruturuka ku mirasire ya ultraviolet
Ku bijyanye na Tr-ARPES, kugabanya uburebure bw'urumuri rutwara no kongera amahirwe yo gutera umwuka mu buryo bwa ionization ni uburyo bwiza bwo kubona flux nyinshi na order frequency. Mu gukora harmonics zo mu rwego rwo hejuru hamwe na frequency imwe yo gusubiramo cyane, uburyo bwo gusubiramo inshuro ebyiri cyangwa uburyo bwo gusubiramo inshuro eshatu bukoreshwa cyane kugira ngo hongerwe imikorere myiza ya harmonics zo mu rwego rwo hejuru. Hakoreshejwe compression ya post-pulse, biroroshye kugera ku bucucike bw'imbaraga bukenewe kugira ngo harmonics zo mu rwego rwo hejuru zikoreshwejwe hakoreshejwe urumuri rugufi rwa pulse drive, bityo umusaruro mwiza ushobora kuboneka kuruta uwo mu mashini ndende ya pulse drive.

Monochromator ifite double grating igabanya umuvuduko wo kuzenguruka imbere
Gukoresha ikintu kimwe gitandukanya ibintu muri monochromator bitanga impinduka muriitara ry'amasoinzira inyura mu buryo bw'umurambararo mu muyoboro w'ingufu ngufi cyane, izwi kandi nka "pulse forward tilt", bigatuma igihe kigenda kirangirira. Itandukaniro ry'igihe cyose ku gace k'ingufu gafite uburebure bwa "diffraction" λ ku murongo wa "diffraction" m ni Nmλ, aho N ari umubare wose w'imirongo imurika. Hamwe no kongeramo ikindi kintu gihindura imiyoboro, imbere y'ingufu ihinduka ishobora kugarurwa, kandi monochromator ifite indishyi yo gutinda igihe ishobora kuboneka. Kandi mu guhindura inzira y'urumuri hagati y'ibice bibiri bya monochromator, "grating pulse shaper" ishobora guhindurwa kugira ngo ihuze neza n'ikwirakwira ry'imirasire ya harmonic yo mu rwego rwo hejuru. Bakoresheje igishushanyo cy'indishyi yo gutinda igihe, Lucchini n'abandi bagaragaje ko bishoboka ko habaho no kugaragaza imiyoboro ya ultraviolet ya monochrome igufi cyane ifite ubugari bwa 5 fs.
Itsinda ry’ubushakashatsi rya Csizmadia ryo muri ELE-Alps Facility mu kigo cy’Uburayi cy’Umucyo Udasanzwe ryageze ku buryo urumuri rwa ultraviolet ruhinduka cyane hakoreshejwe monochromator ifite uburebure bubiri bw’urumuri rurerure kandi rutembera neza mu murongo w’urumuri rurerure. Bakoze harmonics zo mu rwego rwo hejuru bakoresheje drive.laserhamwe n'igipimo cyo gusubiramo cya 100 kHz kandi yageze ku bugari bukabije bw'umuvuduko wa ultraviolet wa 4 fs. Iki gikorwa gifungura amahirwe mashya yo gupima igihe mu buryo bworoshye mu kigo cya ELI-ALPS.

Isoko ry'urumuri rwa ultraviolet rukoreshwa cyane mu bushakashatsi ku mikorere ya electron, kandi rwagaragaje amahirwe menshi yo gukoreshwa mu bijyanye na attosecond spectroscopy na microscopic imaging. Bitewe n'iterambere rikomeje no guhanga udushya mu bumenyi n'ikoranabuhanga, ultraviolet ikoreshwa cyane mu mikorere ya ultraviolet.isoko y'urumuriIri gutera imbere mu cyerekezo cyo gusubiramo inshuro nyinshi, ubwinshi bwa photon flux, ingufu nyinshi za photon n'ubugari bugufi bw'amajwi. Mu gihe kizaza, ubushakashatsi bukomeje ku masoko y'urumuri rwa ultraviolet rusubiramo inshuro nyinshi buzarushaho guteza imbere ikoreshwa ryarwo mu buryo bw'ikoranabuhanga n'ubundi bushakashatsi. Muri icyo gihe, kunoza no kugenzura ikoranabuhanga ry'urumuri rwa ultraviolet rusubiramo inshuro nyinshi ndetse no gukoreshwa kwarwo mu buryo bw'igerageza nka spectroscopy ya photoelectron resolution nabyo bizaba ari byo byibandwaho mu bushakashatsi bw'ejo hazaza. Byongeye kandi, ikoranabuhanga rya spectroscopy ya attosecond transient absorption ryakemuwe igihe n'ikoranabuhanga rya microscopic imaging ishingiye ku bushobozi bwinshi bwo gusubiramo inshuro nyinshi na ultraviolet ultraviolet nabyo byitezwe ko bizakomeza kwigwa, gutezwa imbere no gushyirwa mu bikorwa kugira ngo hagerwe ku ishusho ya attosecond time-resolved na nanospace-resolved imaging igezweho mu gihe kizaza.