Munguva pfupi yapfuura, Institute of Applied Physics yeRussia Academy yeScience yakaunza eXawatt Center yeExtreme Light Study (XCELS), chirongwa chekutsvagisa chemidziyo mikuru yesainzi yakavakirwa zvakanyanya.high simba lasers. Iyo purojekiti inosanganisira kuvakwa kweakanyanyahigh simba laserzvichibva pane optical parametric chirped pulse amplification tekinoroji mune yakakura aperture potassium dideuterium phosphate (DKDP, kemikari formula KD2PO4) makristasi, ane inotarisirwa kuburitswa kwe600 PW peak simba pulses. Iri basa rinopa ruzivo rwakakosha uye zvakawanikwa pakutsvagisa nezve chirongwa cheXCELS nemasisitimu ayo emalaser, inotsanangura mashandisirwo uye zvingangokanganisa zvine chekuita nekubatana kwakasimba kwechiedza chemunda.
Chirongwa cheXCELS chakatsanangurwa muna 2011 nechinangwa chekutanga chekuwana simba repamusorolaserpulse kubuda kwe200 PW, iyo parizvino yakakwidziridzwa kusvika ku600 PW. ZvayoLaser systeminotsamira pamatatu akakosha matekinoroji:
(1) Optical Parametric Chirped Pulse Amplification (OPCPA) teknolojia inoshandiswa panzvimbo yechinyakare Chirped Pulse Amplification (Chirped Pulse Amplification, OPCPA). CPA) tekinoroji;
(2) Uchishandisa DKDP seyepakati yekuwana, yekupedzisira wideband nhanho yekufananidza inowanikwa pedyo ne910 nm wavelength;
(3) Aperture hombe neodymium girazi laser ine pulse simba rezviuru zvejoules inoshandiswa kupomba parametric amplifier.
Ultra-wideband phase matching inowanikwa zvakanyanya mumakristasi mazhinji uye inoshandiswa muOPCPA femtosecond lasers. DKDP makristasi anoshandiswa nekuti ndiwo ega zvinhu zvinowanikwa mukuita zvinogona kukura kusvika makumi emasentimita ekuvhura uye panguva imwechete zvine hunhu hunogamuchirika hwekuona kutsigira kukwidziridzwa kwesimba rePW yakawanda.lasers. Inowanikwa kuti kana iyo DKDP crystal inopombwa nekaviri frequency mwenje weND girazi laser, kana inotakura wavelength yeamplified pulse iri 910 nm, mazwi matatu ekutanga eTaylor yekuwedzera ye wave vector mismatch ari 0.
Mufananidzo 1 ndeye schematic marongerwo eiyo XCELS laser system. Magumo ekumberi akaburitsa chirped femtosecond pulses ine central wavelength ye910 nm (1.3 muFigure 1) uye 1054 nm nanosecond pulses akaiswa muOPCPA pumped laser (1.1 uye 1.2 muFigure 1). Iyo yekumberi yekupedzisira inovimbisawo kuwiriranisa kweaya mapurusi pamwe neinodiwa simba uye spatiotemporal paramita. OPCPA yepakati inoshanda pamwero wepamusoro wekudzokorora (1 Hz) inosimudzira kupuruzira kunosvika makumi ejoules (2 muMufananidzo 1). Iyo pulse inowedzerwa zvakare neBooster OPCPA kuita imwechete kilojoule danda uye yakakamurwa kuita gumi nemaviri akafanana ma sub-beam (4 muMufananidzo 1). Muchikamu chekupedzisira che12 OPCPA, imwe neimwe ye12 chirped light pulses inokwidziridzwa kusvika pa kilojoule level (5 muFigure 1) uye inomanikidzwa ne12 compression gratings (GC ye6 muFigure 1). Iyo acousto-optic programmable dispersion sefa inoshandiswa kumberi kumberi kunyatso kudzora velocity yeboka kupararira uye yakakwirira kurongeka kupararira, kuitira kuti uwane iyo diki diki inobvira pulse upamhi. Iyo pulse spectrum ine chimiro chinenge 12th-order supergauss, uye spectral bandwidth pa 1% yehukuru hwepamusoro ndeye 150 nm, inoenderana neFourier shandura muganho pulse width ye17 fs. Tichifunga nezvekusakwana kwekuparadzira muripo uye kuomerwa kweasina mutsara chikamu muripo mune parametric amplifiers, inotarisirwa kupuruzira upamhi ndeye 20 fs.
Laser yeXCELS ichashandisa maviri 8-channel UFL-2M neodymium girazi laser frequency doubling modules (3 muFigure 1), iyo gumi nenhatu ichashandiswa kupomba Booster OPCPA uye gumi nemaviri yekupedzisira OPCPA. Iwo matatu asara chiteshi achashandiswa seyakazvimirira nanosecond kilojoule pulsedLaser sourceskune zvimwe zviedzo. Yakaganhurirwa neiyo optical breakdown pachikumbaridzo cheiyo DKDP makristasi, iyo irradiation intensity yepombi inoputirwa inoiswa ku1.5 GW/cm2 kune yega chiteshi uye nguva i3.5 ns.
Imwe neimwe chiteshi cheXCELS laser inoburitsa pulses ine simba re50 PW. Huwandu hwematanho gumi nembiri hunopa huwandu hwekubuda kwesimba re600 PW. Mukamuri huru inotariswa, iyo yakanyanya kutarisisa kusimba kwechiteshi chega chega pasi pemamiriro akanaka ndeye 0.44 × 1025 W/cm2, tichifungidzira kuti F/1 inotarisisa zvinhu zvinoshandiswa kutarisisa. Kana iyo pulse yechiteshi chega chega ichiwedzerwa ku 2.6 fs ne post-compression technique, iyo inoenderana inobuda pulse simba ichawedzerwa kusvika 230 PW, inoenderana nechiedza che 2.0 × 1025 W / cm2.
Kuti uwane hukuru hwechiedza chechiedza, pa600 PW kubuda, chiedza chechiedza mumatanho e12 chichave chakananga mu geometry ye inverse dipole radiation, sezvinoratidzwa mumufananidzo 2. Kana pulse chikamu mugeji yega yega isina kuvharwa, kusimba kwekutarisa kunogona kusvika 9×1025 W/cm2. Kana imwe neimwe pulse phase yakakiyiwa uye yakawiriraniswa, iyo inobatana inokonzeresa kusimba kwechiedza kuchawedzerwa kusvika 3.2 × 1026 W/cm2. Pamusoro pekamuri huru inotariswa, chirongwa cheXCELS chinosanganisira anosvika gumi evashandisi marabhoritari, imwe neimwe inogamuchira danda rimwe kana anopfuura ekuedzwa. Ichishandisa iyi mwenje wakasimba kwazvo, chirongwa cheXCELS chinoronga kuita zviedzo muzvikamu zvina: quantum electrodynamics process in intense laser fields; Kugadzirwa uye kukurumidza kwezvikamu; Chizvarwa chechipiri electromagnetic mwaranzi; Laboratory astrophysics, yakakwirira simba density maitiro uye diagnostic research.
FIG. 2 Kutarisa geometry mukamuri huru inotarirwa. Nekujeka, parabolic girazi redanda 6 rakaiswa kuti rive pachena, uye matanda ekupinza uye anobuda anoratidza maviri chete chiteshi 1 uye 7.
Mufananidzo 3 unoratidza kurongeka kwenzvimbo yenzvimbo yega yega inoshanda yeXCELS laser system muchivakwa chekuyedza. Magetsi, pombi dzevacuum, kurapwa kwemvura, kucheneswa uye kufefetera mhepo zviri pasi pasi. Nzvimbo yose yekuvaka inodarika 24,000 m2. Iyo yakazara simba rekushandisa inenge 7.5 MW. Chivako chekuyedza chine mukati megomba rese furemu uye chikamu chekunze, chimwe nechimwe chakavakirwa panheyo mbiri dzakapatsanurwa. Iyo vacuum uye mamwe ma-vibration-inducing masisitimu akaiswa pane iyo vibration-yakasarudzika nheyo, kuitira kuti amplitude yekuvhiringidza inopfuudzwa kune laser system kuburikidza nenheyo uye tsigiro inoderedzwa kusvika isingasviki 10-10 g2 / Hz muhuwandu hwehuwandu hwe. 1-200 Hz. Uye zvakare, network ye geodesic referensi mamaki inomisikidzwa muhoro ye laser kuti itarise zvine hungwaru kudonha kwevhu nemidziyo.
Chirongwa cheXCELS chine chinangwa chekugadzira nzvimbo huru yekutsvagisa yesainzi yakavakirwa papamusoro peak simba lasers. Imwe nzira yeXCELS laser system inogona kupa yakatarisana nemwenje kusimba kwakapetwa kakati wandei kupfuura 1024 W/cm2, inogona kupfuudzwa ne1025 W/cm2 ine post-compression tekinoroji. Ne dipole-yakatarisa pulses kubva kugumi nemaviri chiteshi mune laser system, kusimba kuri padyo ne1026 W/cm2 kunogona kuwanikwa kunyangwe pasina post-kumanikidza uye chikamu kukiya. Kana kuwiriranisa kwechikamu pakati pemachani kwakavharwa, kusimba kwechiedza kuchave kwakapetwa kakati wandei. Uchishandisa aya marekodhi-anotyora pulse intensity uye akawanda-channel danda dhizaini, remangwana XCELS nzvimbo ichakwanisa kuita zviyedzo zvine kusimba kwakanyanya, kuomarara kwemwenje kugovera, uye kuongorora kupindirana uchishandisa akawanda-channel laser matanda uye yechipiri radiation. Izvi zvichaita basa rakasiyana-siyana mumunda weiyo super-simba remagetsi munda wekuyedza fizikisi.
Nguva yekutumira: Mar-26-2024