Tsis ntev los no, lub koom haum ntawm kev thov Physics ntawm Lavxias Academy qhia txog qhov kev kawm txawv (xcels), ib qho kev tshawb fawb rau cov khoom siv science loj raws li cov neeg muaj kev tshawb fawb lojMuaj Zog Fais LasersCov. Qhov project suav nrog kev tsim kho ntawm ib tug heevHigh Felle LaserRaws li kev kho qhov muag tshiab chirged pulse thev naus laus zis ntawm apitteium tov tshuaj Cov haujlwm no muab cov ntsiab lus tseem ceeb thiab tshawb nrhiav cov ntsiab lus XCELS thiab nws cov kev siv laser, cuam tshuam txog cov kev siv hluav taws xob muaj kuab.
Xcels Program tau npaj siab xyoo 2011 nrog thawj lub hom phiaj ntawm kev ua tiav lub zog siablaserMem tes tsim tawm ntawm 200 PW, uas tau hloov kho tshiab rau 600 PW. NwsLaser SystemNyob ntawm peb cov thev naus laus zis tseem ceeb:
(1) Optical parametric chirged pulse amplification (OPCPA) yog siv dua ntawm cov tsoos chired mulse amplification, OPCPA). CPA) thev naus laus zis;
(2) Siv DKDP raws li qhov nce nruab nrab, Ultra Standband theem sib txuam yog pom ze rau 910 wavelength;
(3) Ib qho loj apermium iav laser nrog cov mem tes tes ntawm ntau txhiab tus neeg joules yog siv los tso cov khoom siv ua kom sov siab dua.
Kev txuam dav dav yog dav pom nyob rau hauv ntau lub muaju thiab yog siv nyob rau hauv OPCPA femtosecond lasers. DKDP muaju yog siv vim tias lawv yog cov khoom siv tau pom nyob hauv kev xyaum ua rau aperture ntawm cov txiaj ntsig kho qhov muag tau los txhawb qhov amplification zoo los txhawb rau lub zog ntawm ntau pw zoglasersCov. Nws yog pom tias thaum DKDP Crystal yog nqus los ntawm ob lub teeb ci ntsa iab ntawm lub Taylor nthuav dav ntawm nthwv dej vector mismatch yog 0.
Daim duab 1 yog ib qho qauv schematic ntawm cov xcels laser system. Sab xub ntiag xaus generated chirped femtosecond pulses nrog lub nruab nrab yoj ntawm 910) thiab 1054 nm (1.3 thiab 1.2 thiab 1.2 hauv daim duab 1). Pem hauv ntej kawg kuj ua kom cov synchronization ntawm cov pulses no raws li lub zog hluav taws xob uas xav tau thiab spatiotemporal. Ib nrab OPCPA kev khiav hauj lwm ntawm qhov siab dua repetition tus nqi (1 hz) Amplifies lub chired memes (2 hauv daim duab 1). Cov mem tes yog ntxiv rau OPCPA rau hauv ib kilojoule nqaj thiab muab faib ua 12 lub ntsej muag sub-ci (4 hauv daim duab 1). Nyob rau hauv lub xeem kawg 12 OPCPA, txhua ntawm 12 Chi chirped lub teeb pom kev zoo yog nthuav dav rau qib kilojoule (5 hauv daim duab 1) thiab tom qab ntawd gratings (GC ntawm 6 hauv Daim Duab 1). Acousto-optic programmable lim tau siv nyob rau hauv cov pab pawg tswj tau zoo thiab kev faib tawm siab, thiaj li tau txais cov mem tes dav dav dav tau. Mem cov mem tes spectrum muaj cov duab ntawm ze li ntawm 12% kev txiav txim siab ntawm 1% ntawm tus nqi siab tshaj plaws yog 150 nm, sib xws rau cov Pulier Transform txwv ntawm 17 FS. Xav txog kev them nyiaj tsis tiav thiab qhov nyuaj ntawm NonLiner Kev Them Nyiaj hauv angortric amplasing Amplaint, cov kev xav pom dav dav yog 20 FS.
Cov xcels laser yuav ntiav ob 8-channel Ufl-2 m neodhal-2 Cov seem uas muaj peb lub sijhawm yuav raug siv ua kev ywj pheej nanosecond kilooj hiloedLaser kom muaj txiaj ntsigrau lwm qhov kev sim. Txwv los ntawm qhov kho qhov muag tawg ntawm DKDP muaju, kev siv hluav taws xob, kev siv hluav taws xob ntawm cov mem tes tau teeb tsa rau 1.5 GW / CM2 rau txhua channel thiab lub sijhawm yog 3.5 ns.
Txhua qhov channel ntawm cov xcels laser tsim pulses nrog lub zog ntawm 50 PW. Tag nrho ntawm 12 channel tau muab tag nrho cov tso zis zog ntawm 600 PW. Nyob rau hauv lub hom phiaj tseem ceeb, qhov siab tshaj plaws tsom xam ntawm txhua channel nyob rau hauv txhua qhov kev mob zoo tagnrho yog 0.44 × 1025 w / cm2, kwv yees tias F / 1 tsom rau kev tsom mus. Yog tias cov mem tes ntawm txhua channel yog ntxiv compressed rau 2.6 fs los ntawm post-compressionators
Yuav kom ua tiav kev siv hluav taws xob ntau dua, ntawm 600 PW tawm, lub teeb pulse hluav taws xob, raws li pom nyob rau hauv txhua channel tsis xauv, kev tsom kho tau Mus txog 9 × 1025 w / cm2. Yog tias txhua tus mem tes theem tau xauv thiab synchronized, tus coherent tshwm sim lub teeb siv yuav nce mus rau 3.2 × 1026 w / cm2. Ntxiv rau chav tsev loj, XCELS Project suav nrog txog 10 tus neeg siv lub chaw soj nstuam, txhua tus tau txais lossis ntau qhov teeb. Siv cov teeb meem hluav taws xob tsis tshua muaj zog, cov XCELS Project npaj ua kom muaj kev sim hauv plaub pawg: Quantum Electrodynamics cov txheej txheem hauv kev nkag siab laser; Kev tsim khoom thiab nrawm ntawm hais; Tiam ntawm theem nrab hluav taws xob hluav taws xob hluav taws xob; Kuaj cov txheej txheem Astrophysics, kev tshawb nrhiav lub zog siab thiab kuaj mob kuaj mob.
Daim duab. 2 Tsom rau Geometry nyob rau hauv lub hom phiaj tseem ceeb. Rau kev pom tseeb, parabolic tsom iav ntawm nqaj 6 tau teev rau pob tshab, thiab cov tswv yim thiab cov tso zis tawm tsuas yog ob txoj kev nyob ib feem 1 thiab 7
Daim duab 3 Qhia cov nplaim hluav taws xob ntawm txhua thaj chaw ua haujlwm ntawm cov xcels laser system hauv kev sim ua lub tsev. Hluav taws xob, lub tshuab nqus tsev twj, kev kho cov dej, purification thiab cua txias yog nyob hauv qab daus. Tag nrho cov chaw tsim kho yog ntau tshaj 24,000 M2. Tag nrho cov hluav taws xob noj yog li 7.5 mw. Lub tsev sim muaj teeb meem sab hauv tag nrho thav duab thiab seem sab nraud, txhua tus ua rau ob lub hauv paus ua tiav. Lub tshuab nqus tsev thiab lwm yam kev co-inducching lub tshuab yog ntsia rau ntawm lub hauv paus kev cai sib kis, yog li cov kev sib cais ntawm kev tab kaum thiab kev txhawb nqa yog txo kom tsawg dua 10-10 g2 / hz nyob rau hauv cov zaus ntau 1-200 hz. Tsis tas li ntawd, ib lub network ntawm Geodesic siv cov cim tau teeb tsa hauv lub tsev laser kom saib xyuas drift ntawm av thiab khoom siv.
Lub XCELS Project lub hom phiaj los tsim kev tshawb nrhiav chaw tshawb fawb txog kev tshawb fawb txog thaum muaj peev xwm loj dua. Ib qho channel ntawm cov xcels laser system yuav muab lub teeb siv lub teeb sib zog ntau dua 1024 w / cm2, uas tuaj yeem tshaj li 1025 w / cm2 nrog post-compression tshuab. Los ntawm dipole-tsom mus pulses los ntawm 12 raws nyob rau hauv lub laser system, ib qho kev sib zog ze rau ntawm 1026 w / cm acheted txawm tias tsis muaj posts-compression thiab theem ntsuas phoo. Yog hais tias theem synchronization ntawm cov channels raug kaw, lub teeb siv zog yuav yog ob peb zaug siab dua. Siv cov ntaub ntawv no ua kom tawg cov mem tes thiab cov kev sim xcels ntau, cov kev sib cuam tshuam xcels ntau yam siv cov kab teeb ci thiab cov teeb ci ntsa iab. Qhov no yuav ua lub luag haujlwm tshwj xeeb hauv kev teb super-muaj zog Electromagnetic teb sim ua Physics.
Lub sij hawm ncua: Mar-26-2024