Ukukhanya kwekhamera yedijithali yeTeleskopu eNkulu yoVavanyo lweeNkcukacha eShiya iLLNL ilungele ukudityaniswa.
Into enkulu: ilensi enkulu yekhamera enkulu yedijithali.
Iilensi ezilinganisa i-1.57 yeemitha ngapha nangapha kwaye kucingelwa ukuba zezona zintsebenzo eziphezulu zentsimbi esele zenzekile sele ifikile ILebhu yeSlc Accelerator yeSizwe, inyathelo eliphambili lokuya kwindawo ekuyiwa kuyo ekugqibeleni kwikhamera yedijithali esetyenziswa yiTeleskopu yeSaveyi eNkulu (LSST).
Indibano epheleleyo yeelensi zekhamera, kubandakanya ilensi enkulu ye-L1 kunye neqabane elincinci le-L2 lens elinganisa i-1.2 yeemitha ubukhulu, yayilwa nguLebhu yeSizwe kaLawrence Livermore (LLNL) kwaye yakhiwe ngaphezulu kweminyaka emihlanu nge Ibhola yomoya kunye nekontrakta encinci Iinkqubo zeArizona Optical. Ilensi yesithathu, i-L3, i-72 iisentimitha ububanzi, nayo iya kusiwa kwi-SLAC ingaphelanga inyanga.
I-SLAC ilawula uyilo lulonke, ubuqhetseba kunye nendibano yokugqibela ye-LSST's 168 yezigidi zeedola, i-3,200-megapixel yedijithali yekhamera, ekuthiwa ngoku iipesenti ezingama-90 zigqityiwe kwaye kufanele ukuba igqitywe kwangoko ngo-2021.
"Ukuphumelela kokuyilwa kwale ndibano yodwa ye-optical ngumboniso wobuchwephesha obukhokelayo be-LLNL kwihlabathi kwi-optics enkulu, eyakhelwe kumashumi eminyaka yamava kulwakhiwo lweenkqubo ze-laser ezinkulu nezona zinamandla ehlabathini," utshilo uScot Olivier, Uthathe inxaxheba kwiprojekthi ye-LSST kaLawrence Livermore ngaphezulu kweshumi leminyaka.
Ngokwe-LSST Corporation, ikhamera yedijithali kwi-LSST yeyona khamera inkulu yedijithali eyakha yakhiwa. Ubume bokugqibela buya kulinganisa i-1.65 x 3 yeemitha kunye nobunzima be-2,800 kg. Ngumboniso omkhulu, umfanekiso obanzi obonisa ukukhanya okwazi ukubona ukukhanya ukusuka kufutshane ne-ultraviolet ukuya kufutshane ne-infrared.
Xa zidityanisiwe, iilensi ze-L1 kunye ne-L2 ziya kuhlala kubume be-optic ngaphambili komzimba wekhamera; I-L3 iya kwenza ifestile yokungena kwikristostat yekhamera, equlathe inqwelomoya yayo ejolise kuyo kunye nezinto zombane ezinxulumene noko.
Ukuchaneka kweemfuno
Inkqubo ye- Ikhamera yedijithali yeCCD iya kurekhoda imifanekiso ebonwe yinkqubo ephambili ye-telescope ebonakalayo, ngokwayo a Inoveli yoyilo lwesipili esithathuUkudibanisa i-8.4 yeemitha zaseprayimari, i-3.4 yemitha yesibini kunye ne-5 yemitha yezipili zemfundo ephakamileyo. Ukukhanya kokuqala kwi-LSST kulindeleke ngo-2020, ngokusebenza ngokupheleleyo kuqala ngo-2022.
Ukuyila ikhamera yedijithali ekwaziyo ukuhlangabezana neenjongo zokucinga ze-LSST kukhokelele i-LLNL ukuba ijongane nemiceli mngeni emininzi, ngokweqela leprojekthi. Ifomathi yokugqibela yomtshini isebenzisa i-mosaic ye-189 ye-16-megapixel i-detector detectors ehlelwe kwi-"rafts" ezingama-21 ukubonelela isisombululo se-gigapixels esipheleleyo se-3.2.
Ikhamera iya kuthatha ukuboniswa kwemizuzwana eli-15 rhoqo kwimizuzwana engama-20, iteleskopu iphinde iphinde iphinde izinze kwimizuzwana emihlanu, efuna ubume obufutshane nobungqindilili. Oku kuthetha ukuba inani elincinci kakhulu le-f, kunye nokujolisa ngqo kwikhamera.
Amaxwebhu e-LSST abonisa ukuba ukuvezwa kwemizuzwana eli-15 kulungelelwaniso lokuvumela ukubona imithombo ebuthathaka kunye nehambayo. Ukuboniswa ixesha elide kuya kunciphisa ngaphezulu kokufundwa kwekhamera kunye nokubekwa kwakhona kweteleskopu, ukuvumela ukucinga okunzulu, kodwa izinto ezikhawulezayo nezikufutshane noMhlaba ziya kuhamba kakhulu ngexesha lokuvezwa. Indawo nganye esibhakabhakeni iya kuba nomfanekiso-ngqondweni ngezihlandlo ezibini ezilandelelanayo zesekondi ezili-15, ukwala ukubetha kwe-cosmic ray kwii-CCDs.
Nangaliphi na ixesha uqala ukwenza into okokuqala, kuya kubakho imiceli mngeni, kwaye ukuveliswa kwelensi ye-LSST L1 kungqineke kungekho kwahlukile, utshilo u-Justin Wolfe we-LLNL. Usebenza ngesiqwenga seglasi ngaphezu kweemitha ezintlanu ububanzi kwaye zii-intshi ezine ubukhulu kuphela. Nakuphi na ukuphatha kakubi, ukothuka okanye ingozi kunokubangela ukonakala kwelensi. Iilensi ngumsebenzi wobugcisa kwaye sonke siyazingca ngalo nto. ”
Ixesha Post: Oct-31-2019