Intuthuko e-Ultraviolet eyeqileUbuchwepheshe bomthombo obukhanyayo
Eminyakeni yamuva nje, imithombo eyedlulele ye-ultraviolet ephezulu idonsele ukunakwa kakhulu emkhakheni wamandla we-elektroni ngenxa yokuhlangana kwayo okuqinile, isikhathi esifushane se-Photon kanye ne-Photon Energy, futhi isetshenziswe ezifundweni ezahlukahlukene zokucabanga. Ngokuthuthuka kobuchwepheshe, lokhuUmthombo OkhanyayoIthuthukisa imvamisa ephakeme yokuphindaphinda, i-Photon Flux ephakeme, i-Photon Energy ephakeme kanye nobubanzi be-pulse elifushane. Lokhu kusengaphambili akugcini nje ngokulungisa ukulungiswa kokulinganisa kwemithombo ekhanyayo ye-ultraviolet, kepha futhi ihlinzeka ngamathuba amasha weThendli yentuthuko yesikhathi esizayo. Ngakho-ke, ukutadisha okujulile nokuqonda kwemvamisa ephezulu yokuphindaphinda okwedlulele kwe-Ultraviolet Light Source kubaluleke kakhulu ekubuzeni kahle nokusebenzisa ubuchwepheshe bokusika.
Ngezilinganiso ze-Electron Spectroscopy ezikalini ze-femtosecond kanye ne-atosecond time Scales, inani lemicimbi elinganiselwe kugongolo olulodwa livame ukunganele, ukwenza imithombo yokukhanya ephansi yokwenziwa yanele ukuthola izibalo ezithembekile zokuthola izibalo ezithembekile zokuthola izibalo ezithembekile zokuthola izibalo ezithembekile ukuze zithole izibalo ezithembekile ukuze zithole izibalo ezithembekile zokuthola izibalo ezithembekile zokuthola izibalo ezithembekile ukuze zithole izibalo ezithembekile zokuthola izibalo ezithembekile. Ngasikhathi sinye, umthombo wokukhanya onesithombe esiphansi se-Flux uzonciphisa isilinganiso sokulinganisa umsindo wokulingiswa kwesifo se-microscopic ngesikhathi sokuvezwa okukhawulelwe isikhathi. Ngokuhlola okuqhubekayo nokuhlolwa, abacwaningi benze intuthuko eminingi ekwenzeni isivuno kanye nokwakhiwa kokuphindaphinda okuphezulu okuphindaphindeka ngokweqile kwe-ultraviolet Light. Ubuchwepheshe bokuhlaziya obusezingeni eliphezulu obuhlanganiswe nemvamisa ephindaphindekayo ebiyelwe ngokweqile i-Ultraviolet Light Source isetshenziselwe ukufeza isilinganiso esiphezulu sokulinganisa sesakhiwo sezinto ezibonakalayo kanye nenqubo eshukumisayo ye-elekthronikhi.
Izicelo zemithombo ekhanyayo ye-ultraviolet, njengokulinganisa okuzenzakalelayo kwe-Electron Spectroscopy (ARPES), dinga ugongolo lokukhanya okwedlulele kwe-ultraviolet ukukhanyisa isampula. Ama-elektroni angaphezulu kwesampula ajabule ngesimo esiqhubekayo ngokukhanya okwedlulele kwe-ultraviolet, kanye namandla we-kinetic kanye ne-englec angle yamandla e-photoleelectrons aqukethe imininingwane yesampula. I-Electron Analyzer enomsebenzi wokuxazulula i-Angle ithola ama-photoleectrons asatshalaliswa futhi ithola isakhiwo se-band eduze kwe-valence band yesampula. Ngokuphindaphindwa okuphindaphindwayo okuningana ngokweqile kwe-ultraviolet ukukhanya umthombo wokukhanya, ngoba ishayela layo elilodwa liqukethe inani elikhulu le-photons, lizovuselela inani elikhulu lama-photoleelectrons ekhasini lesikhashana, futhi ukusebenzisana kwe-coulomb kuzoletha ukwanda okukhulu kokusatshalaliswa kwamandla we-photoleelectron, okubizwa ngokuthi yi-Space Castfect Energy, okubizwa ngokuthi yi-Space Cast. Ukuze unciphise ithonya le-Space Charge Effect, kuyadingeka ukunciphisa ama-photoleelectrons aqukethe ekushayweni ngakunye ngenkathi ugcina i-Photon Flux, ngakho-ke kuyadingeka ukushayelai-laserNgokuzama okuphindaphindayo okuphindaphindwayo ukukhiqiza umthombo wokukhanya we-ultraviolet owejwayelekile ngemvamisa ephezulu yokuphindaphinda.
Ubuchwepheshe obuthuthukisiwe be-cavity cavity bubona isizukulwane se-harmonics ephakeme e-Harmonics e-MHZ Repetition Frequency
Ukuze uthole umthombo okhanyayo we-ultraviolet ngenani eliphindaphindwayo elifinyelela ku-60 MHZ, i-Jones Team e-University of British Columbia e-United Kingdom yenza i-artaviolet light realonment devity (FSEC) ukufezekisa umthombo we-extraviolet ohlelekile we-ambar axazulule i-altron spectroscopy (i-arpes) izivivinyo. Umthombo wokukhanya uyakwazi ukuletha i-Photon Flux yezinombolo ze-Photon ezingaphezu kwe-1011 Photon ngomzuzwana nge-almonic eyodwa ngenani eliphindaphindwayo nge-8 kuya ku-40 eV. Basebenzise uhlelo lwe-ytterbium-doped fiber laser njenge-FSEC, kanye nezimpawu ezilawulwa yi-pulse nge-loise ye-laser eyenziwe ngokwezifiso ukunciphisa umsindo wenhlangano ye-offsetset surtsen laseSurceset offsetf offset offf offsetf offsetf offsert offf offserchsetf offserfsensetch frequency. Ukuthola ukuthuthukiswa okuzinzile kwe-resonance ngaphakathi kwe-FSEC, basebenzisa ama-loops amathathu e-servo control for for control, okuholela ekuzinziseni okusebenzayo ngama-degree amabili we-Fserling ngaphakathi kwe-Fler Pulceling ngesikhathi se-Fler Pulse (ie, isigaba semvilophu yenethiwekhi, φo).
Ngokusebenzisa i-Krypton Gas njengegesi esebenzayo, iqembu lokucwaninga lathola isizukulwane se-harmonics ephakeme ku-FSEC. Benze izilinganiso ze-tr-arpes ze-graphite futhi babona ukufudumala okusheshayo kanye nokubuyiselwa okuhamba kancane kwe-elektroni ethokozisayo yabantu, kanye nama-dynamics wezizwe ezingezinhle ezingezinhle ngokuqondile eduze kwe-Fermi Level ngenhla kwe-Fermi ngenhla kwe-Fermi ngenhla kwe-Fermi ngaphezulu kwe-0.6 eV. Lo mthombo wokukhanya uhlinzeka ngethuluzi elibalulekile lokufunda ukwakheka kwe-elekthronikhi kwezinto eziyinkimbinkimbi. Kodwa-ke, isizukulwane sama-hambuctics ahlekisayo ku-FSEC sinezidingo eziphakeme kakhulu zokuthengwa, ukunxeshezelwa kokuhlakazeka, ukulungiswa okuhle kobude be-cavity kanye nokukhiya okungcono kakhulu, okuzothinta kakhulu ukuthuthukiswa komthambo okuthuthukiswa okuthuthukisiwe. Ngasikhathi sinye, ukuphendula kwesigaba esingahleliwe kwe-plasma endaweni efanelekile ye-cavity nakho kuyinselele. Ngakho-ke, njengamanje, lolu hlobo lomthombo wokukhanya aluphenduki i-ultraviolet ebi kakhuluUmthombo wokukhanya okuphezulu okuphezulu.
Isikhathi sePosi: APR-29-2024