Shintsha ijubane lokushaya kwenhliziyoi-laser emfushane kakhulu enamandla kakhulu
Ama-laser amafushane kakhulu ngokuvamile abhekisela kuma-laser pulses anobubanzi be-pulse obungamashumi namakhulu ama-femtoseconds, amandla aphezulu ama-terawatts nama-petawatts, futhi ukuqina kwawo kokukhanya okugxile kudlula i-1018 W/cm2. I-laser emfushane kakhulu kanye nomthombo wayo we-super radiation okhiqizwayo kanye nomthombo wezinhlayiya zamandla aphezulu zinobubanzi obukhulu benani lokusetshenziswa eziqondisweni eziningi zocwaningo eziyisisekelo njenge-high energy physics, i-particle physics, i-plasma physics, i-nuclear physics kanye ne-astrophysics, futhi umphumela wemiphumela yocwaningo lwesayensi ungakhonza izimboni ezifanele zobuchwepheshe obuphezulu, impilo yezokwelapha, amandla emvelo kanye nokuphepha kokuvikela kwezwe. Kusukela kwasungulwa ubuchwepheshe bokukhulisa i-pulse obuchichimayo ngo-1985, ukuvela kwe-beat watt yokuqala emhlabeni.i-laserngo-1996 kanye nokuqedwa kwe-laser yokuqala yama-watt ayi-10 emhlabeni ngo-2017, ukugxila kwe-laser emfushane kakhulu esikhathini esidlule bekuwukuthola "ukukhanya okunamandla kakhulu". Eminyakeni yamuva nje, izifundo zibonise ukuthi ngaphansi kwesimo sokugcina ama-pulse e-super laser, uma ijubane lokudlulisa i-pulse le-laser emfushane kakhulu lingalawulwa, lingaletha umphumela ophindwe kabili ngomzamo oyingxenye kwezinye izinhlelo zokusebenza zomzimba, okulindeleke ukuthi kunciphise ubukhulu be-super ultra-short.amadivayisi e-laser, kodwa ithuthukisa umphumela wayo ekuhlolweni kwe-laser physics yensimu ephezulu.
Ukuhlanekezelwa kwe-pulse front ye-laser emfushane kakhulu enamandla kakhulu
Ukuze kutholakale amandla aphezulu ngaphansi kwamandla alinganiselwe, ububanzi be-pulse buncishiswa bube yimizuzwana engu-20-30 ngokwandisa i-bandwidth yokuthola. Amandla e-pulse e-laser yamanje engu-10-beak-watt ultra-short angaba ngu-300 joules, kanti umkhawulo womonakalo ophansi we-compressor grating wenza i-beam aperture ibe nkulu kakhulu kune-300 mm. I-pulse beam enobubanzi be-pulse be-femtosecond engu-20-30 kanye ne-300 mm aperture kulula ukuyithwala i-spatiotemporal coupling distortion, ikakhulukazi i-distortion ye-pulse front. Isibalo 1 (a) sibonisa ukuhlukaniswa kwe-spatio-temporal kwe-pulse front kanye ne-phase front okubangelwa ukusabalala kwendima ye-beam, kanti eyokuqala ikhombisa "i-spatio-temporal tilt" uma kuqhathaniswa neyokugcina. Esinye "i-curvature ye-space-time" eyinkimbinkimbi kakhulu ebangelwa uhlelo lwelensi. Isibalo 1 (b) sibonisa imiphumela ye-best pulse front, i-intended pulse front kanye ne-bent pulse front ekuphambukeni kwe-spatio-temporal kwensimu yokukhanya eqondiwe. Ngenxa yalokho, ukuqina kokukhanya okugxilile kuncishiswa kakhulu, okungavumeli ukusetshenziswa kwe-laser emfushane kakhulu.
UMFANELO 1 (a) ukuthambekela kwengaphambili le-pulse okubangelwa yi-prism kanye ne-grating, kanye (b) nomphumela wokuphambuka kwengaphambili le-pulse ensimini yokukhanya yesikhala-sikhathi kuthagethi
Ukulawulwa kwesivinini se-pulse kwe-ultra-strongi-laser emfushane kakhulu
Njengamanje, imisebe yeBessel ekhiqizwa yi-conical superposition yamagagasi endiza ibonise inani lokusetshenziswa ku-high field laser physics. Uma i-conically superimposed pulsed beam inokusabalalisa kwe-axisymmetric pulse front, khona-ke ubukhulu be-geometric center yephakethe le-X-ray wave elikhiqizwe njengoba kuboniswe ku-Figure 2 bungaba yi-continual superluminal, i-continual subluminal, i-accelerated superluminal, kanye ne-decelerated subluminal. Ngisho nokuhlanganiswa kwesibuko esiguquguqukayo kanye ne-phase type spatial light modulator kungakhiqiza isimo se-arradically spatio-temporal se-pulse front, bese kukhiqiza isivinini sokudlulisa esingalawuleki. Umphumela ongenhla womzimba kanye nobuchwepheshe bawo bokuguqula kungaguqula "ukuhlanekezela" kwe-pulse front kube "ukulawula" kwe-pulse front, bese kuqaphela injongo yokuguqula isivinini sokudlulisa se-ultra-strong ultra-short laser.
UMFANELO 2 Ama-pulse okukhanya angaphansi kokukhanya (a) aqhubekayo ashesha kunokukhanya, (b) angaphansi kokukhanya okungaguquki, (c) asheshiswe ngokushesha kunokukhanya, kanye (d) nama-pulse okukhanya angaphansi kokukhanya ancishisiwe akhiqizwa yi-superposition atholakala enkabeni yejiyometri yesifunda se-superposition
Nakuba ukutholakala kokuphazamiseka kwe-pulse front kungaphambi kwe-laser emfushane kakhulu, bekulokhu kukhulunywa kakhulu ngokuthuthukiswa kwe-laser emfushane kakhulu. Sekuyisikhathi eside, akusizi ekufezeni umgomo oyinhloko we-laser emfushane kakhulu - ukuqina kokukhanya okugxile kakhulu, futhi abacwaningi bebesebenza ukucindezela noma ukuqeda ukuphazamiseka okuhlukahlukene kwe-pulse front. Namuhla, lapho "ukuphazamiseka kwe-pulse front" sekuthuthuke kwaba "ukulawula i-pulse front", kufinyelele ekulawulweni kwesivinini sokudlulisa se-laser emfushane kakhulu, okuhlinzeka ngezindlela ezintsha namathuba amasha okusetshenziswa kwe-laser emfushane kakhulu ku-physics ye-laser ephezulu.
Isikhathi sokuthunyelwe: Meyi-13-2024