I kēia mau lā, ua hoʻolauna ka Institute of Applied Physics o ka Russian Academy of Sciences i ka eXawatt Center for Extreme Light Study (XCELS), kahi papahana noiʻi no nā mea ʻepekema nui e pili ana i ka nui.nā laser mana kiʻekiʻe. Aia ka papahana i ke kūkulu ʻana i kahi loalaser mana kiʻekiʻee pili ana i ka optical parametric chirped pulse amplification technology in large aperture potassium dideuterium phosphate (DKDP, chemical formula KD2PO4) crystals, me ka huina o ka puka o 600 PW peak power pulses. Hāʻawi kēia hana i nā kikoʻī koʻikoʻi a me nā ʻike noiʻi e pili ana i ka papahana XCELS a me kāna mau ʻōnaehana laser, e wehewehe ana i nā noi a me nā hopena kūpono e pili ana i ka launa pū ʻana o ka māla māmā.
Ua hāpai ʻia ka papahana XCELS i ka makahiki 2011 me ka pahuhopu mua o ka loaʻa ʻana o ka mana kiʻekiʻelaserpuka pulse o 200 PW, i kēia manawa i hoʻonui ʻia i 600 PW. Konaʻōnaehana laserhilinaʻi i ʻekolu mau ʻenehana nui:
(1) Hoʻohana ʻia ka ʻenehana Optical Parametric Chirped Pulse Amplification (OPCPA) ma kahi o ka Chirped Pulse Amplification (Chirped Pulse Amplification, OPCPA). CPA) ʻenehana;
(2) Me ka hoʻohana ʻana iā DKDP ma ke ʻano o ka loaʻa ʻana, ʻike ʻia ka hoʻohālikelike ʻana o ka ultra wideband ma kahi o 910 nm ka lōʻihi;
(3) Hoʻohana ʻia kahi puka aniani neodymium laser nui me ka ikehu puʻupuʻu o nā kaukani joules no ka paila ʻana i kahi amplifier parametric.
ʻIke nui ʻia ka hoʻohālikelike ʻana o ka ultra-wideband phase ma nā kristal he nui a hoʻohana ʻia i nā lasers femtosecond OPCPA. Hoʻohana ʻia nā kristal DKDP no ka mea ʻo lākou wale nō ka mea i loaʻa i ka hoʻomaʻamaʻa hiki ke hoʻonui ʻia i ʻumi mau kenimika o ka aperture a i ka manawa like i loaʻa nā hiʻohiʻona optical e kākoʻo i ka hoʻonui ʻana i ka mana multi-PW.nā lasers. ʻIke ʻia i ka wā e puhi ʻia ai ka aniani DKDP e ke kukui alapine pālua o ka laser aniani ND, inā he 910 nm ka lōʻihi hawewe o ka pulse i hoʻonui ʻia, ʻo nā huaʻōlelo mua ʻekolu o ka hoʻonui ʻana o Taylor o ka hawewe vector mismatch he 0.
ʻO ke kiʻi 1 kahi hoʻolālā hoʻolālā o ka ʻōnaehana laser XCELS. Hoʻokumu ka hopena mua i nā puʻupuʻu femtosecond chirped me ka lōʻihi o ka nalu waena o 910 nm (1.3 i ka Figure 1) a me 1054 nm nanosecond pulses i hoʻokomo ʻia i loko o ka laser pumped OPCPA (1.1 a me 1.2 ma ke Kiʻi 1). ʻO ka hope mua e hōʻoiaʻiʻo i ka hoʻonohonoho ʻana o kēia mau pulses a me ka ikaika a me nā ʻāpana spatiotemporal. ʻO kahi OPCPA waena e hana ana ma kahi kiʻekiʻe o ka hana hou ʻana (1 Hz) e hoʻonui ai i ka pulse chirped i ʻumi o joules (2 ma ke Kiʻi 1). Hoʻonui hou ʻia ka pulse e ka Booster OPCPA i hoʻokahi kilojoule beam a māhele ʻia i 12 sub-beams like (4 ma ke Kiʻi 1). Ma ka 12 OPCPA hope loa, ua hoʻonui ʻia kēlā me kēia o nā puʻupuʻu kukui chirped 12 i ke kiʻekiʻe kilojoule (5 ma ke Kiʻi 1) a laila hoʻopaʻa ʻia e 12 mau pahu kaomi (GC o 6 ma ke Kiʻi 1). Hoʻohana ʻia ka kānana acousto-optic programmable dispersion ma ka ʻaoʻao mua e hoʻomalu pono i ka hoʻopuehu ʻana o ka pūʻulu a me ka hoʻopuehu kauoha kiʻekiʻe, i mea e loaʻa ai ka laula pulse liʻiliʻi loa. ʻO ke ʻano o ka pulse spectrum he ʻano o ka supergauss kokoke i ka 12th-order, a ʻo ka bandwidth spectral ma 1% o ka waiwai kiʻekiʻe he 150 nm, e pili ana i ka Fourier transform limit pulse laula o 17 fs. Ke noʻonoʻo nei i ka uku hoʻopuehu piha ʻole a me ka paʻakikī o ka uku pae laina ʻole i nā mea hoʻonui parametric, ʻo ka laula pulse i manaʻo ʻia he 20 fs.
E hoʻohana ka laser XCELS i ʻelua mau ʻāpana ʻelua 8-channel UFL-2M neodymium glass laser frequency double modules (3 ma ke Kiʻi 1), kahi e hoʻohana ʻia ai he 13 awāwa no ka paila ʻana i ka Booster OPCPA a me 12 OPCPA hope loa. E hoʻohana ʻia nā kahawai ʻekolu i koe e like me ka nanosecond kilojoule pulsedpuna laserno nā hoʻokolohua ʻē aʻe. Hoʻopaʻa ʻia e ka paepae hōʻoki optical o nā kristal DKDP, ua hoʻonohonoho ʻia ka ikaika irradiation o ka pulse pumped i 1.5 GW/cm2 no kēlā me kēia kahawai a ʻo ka lōʻihi he 3.5 ns.
Hoʻopuka kēlā me kēia kahawai o ka laser XCELS i nā pulses me ka mana o 50 PW. Hāʻawi ka huina o 12 i ka mana hoʻopuka piha o 600 PW. I loko o ke keʻena pahuhopu nui, ʻo ka nui o ka nānā ʻana o kēlā me kēia kahawai ma lalo o nā kūlana kūpono ʻo 0.44 × 1025 W / cm2, me ka manaʻo e hoʻohana ʻia nā mea kikoʻī F/1 no ka nānā ʻana. Inā hoʻopili hou ʻia ka pulse o kēlā me kēia kahawai i ka 2.6 fs e ka ʻenehana post-compression, e hoʻonui ʻia ka mana pulse e pili ana i 230 PW, e pili ana i ka ikaika māmā o 2.0 × 1025 W/cm2.
No ka hoʻokō ʻana i ka ʻoi aku ka nui o ka māmā, ma ka puka 600 PW, e hoʻopaʻa ʻia nā puʻupuʻu māmā ma nā kahawai 12 i ka geometry o inverse dipole radiation, e like me ka mea i hōʻike ʻia ma ke Kiʻi 2. Ke hoʻopaʻa ʻole ʻia ka pae pulse i kēlā me kēia kahawai, hiki i ka ikaika o ka manaʻo. hiki i 9×1025 W/cm2. Inā hoʻopaʻa ʻia kēlā me kēia puʻupuʻu puʻupuʻu a hoʻopaʻa ʻia, e hoʻonui ʻia ka ikaika o ka māmā e pili ana i ka 3.2 × 1026 W/cm2. Ma waho aʻe o ka lumi pahuhopu nui, aia ka papahana XCELS a hiki i ka 10 mea hoʻohana laboratories, e loaʻa ana i kēlā me kēia mea i hoʻokahi a ʻoi aku paha nā kukui no nā hoʻokolohua. Ke hoʻohana nei i kēia māla māmā ikaika loa, hoʻolālā ka papahana XCELS e hoʻokō i nā hoʻokolohua ma nā ʻāpana ʻehā: nā kaʻina electrodynamics quantum i nā kahua laser ikaika; ʻO ka hana a me ka wikiwiki o nā ʻāpana; ʻO ka hoʻokumu ʻana o ka radiation electromagnetic lua; Laboratory astrophysics, kaʻina hana hoʻonaʻauao kiʻekiʻe a me ka noiʻi diagnostic.
FIG. 2 Ka nānā 'ana i ka geometry i loko o ke ke'ena pahuhopu nui. No ka akaka, ua hoʻonohonoho ʻia ke aniani parabolic o ka beam 6 i akaka, a ʻo nā kaola hoʻokomo a me nā kaola hoʻopuka e hōʻike i ʻelua mau ala 1 a me 7 wale nō.
Hōʻike ka Figure 3 i ka hoʻolālā spatial o kēlā me kēia wahi hana o ka ʻōnaehana laser XCELS ma ka hale hoʻokolohua. ʻO ka uila, nā ʻumeke wai, ka mālama ʻana i ka wai, ka hoʻomaʻemaʻe a me ka ea ea aia i loko o ka basement. ʻOi aku ka nui o ke kūkulu hale ma mua o 24,000 m2. ʻO ka nui o ka hoʻohana mana ma kahi o 7.5 MW. Aia i loko o ka hale ho'āʻo kahi ʻāpana ākea ākea a me kahi ʻāpana waho, i kūkulu ʻia kēlā me kēia ma luna o ʻelua kumu hoʻokaʻawale. Hoʻokomo ʻia ka vacuum a me nā ʻōnaehana vibration-inducing ʻē aʻe ma luna o ke kumu i hoʻokaʻawale ʻia, i hoʻemi ʻia ka amplitude o ka haunaele i hoʻouna ʻia i ka ʻōnaehana laser ma o ke kumu a me ke kākoʻo e hoʻemi ʻia ma lalo o 10-10 g2 / Hz ma ke alapine o 1-200 Hz. Eia kekahi, ua hoʻonohonoho ʻia kahi pūnaewele o nā māka kuhikuhi geodesic i ka hale laser e nānā pono i ka neʻe ʻana o ka honua a me nā mea hana.
Manaʻo ka papahana XCELS e hana i kahi keʻena noiʻi ʻepekema nui e pili ana i nā lasers mana kiʻekiʻe kiʻekiʻe. Hiki ke hāʻawi i hoʻokahi kahawai o ka ʻōnaehana laser XCELS i ka ikaika o ka mālamalama i ʻoi aku ka nui ma mua o 1024 W/cm2, hiki ke hoʻonui ʻia e 1025 W/cm2 me ka ʻenehana post-compression. Ma ka dipole-focusing pulses mai 12 channels i ka ʻōnaehana laser, hiki ke hoʻokō ʻia kahi ikaika kokoke i 1026 W/cm2 me ka ʻole o ka hoʻopaʻa ʻana a me ka laka ʻana. Inā laka ʻia ka hoʻonohonoho ʻana ma waena o nā kahawai, ʻoi aku ka nui o ka māmā. Me ka hoʻohana ʻana i kēia mau puʻupuʻu hoʻopaʻa moʻolelo a me ka hoʻonohonoho ʻana o ka beam multi-channel, hiki i ka hale XCELS e hiki mai ana ke hana i nā hoʻokolohua me ka ikaika kiʻekiʻe loa, ka puʻupuʻu māmā paʻakikī, a me ka ʻike ʻana i nā pilina me ka hoʻohana ʻana i nā kukuna laser multi-channel a me ka radiation lua. E pāʻani kēia i kahi kūlana kūʻokoʻa ma ke kahua o ka super-strong electromagnetic field experimental physics.
Ka manawa hoʻouna: Mar-26-2024