SLAC Imabweretsa Makanema Openga Kwambiri Padziko Lonse Lapansi

Optical camera Optics for Large Synoptic Survey Telescope achoka ku LLNL ali okonzeka kuphatikizidwa.

lens

Chinthu chachikulu: mandala akulu kwambiri pakamera yayikulu kwambiri yadigito.

Mandala oyenda mita 1.57 modutsa ndikuganiza kuti ndi mandala opambana kwambiri omwe sanapangidwenso afika SLAC National Accelerator Laborator, sitepe yayikulu yopita kumalo ake omaliza opezeka mu kamera ya digito yomwe imagwiritsidwa ntchito ndi Telescope Yaikulu Yophatikiza (LSST).

Msonkhano wonse wamagalasi amakanema, kuphatikiza mandala akulu a L1 limodzi ndi mnzake wocheperako wa L2 wa kutalika kwa mita 1.2, udapangidwa ndi Lawrence Livermore National Laboratory (LLNL) ndikumanga zaka zoposa zisanu mwa Malo A mpira ndi kontrakitala Machitidwe a Arizona Optical. Lens yachitatu, L3, 72 sentimita m'mimba mwake, iperekedwanso ku SLAC pasanathe mwezi.

SLAC ikuyang'anira kapangidwe kake konse, kapangidwe kake komanso msonkhano womaliza wa $ 168 miliyoni ya LSST, kamera ya digito ya 3,200-megapixel, yomwe akuti pano ndi 90% ndipo yatsirizika koyambirira kwa 2021.

"Kupanga bwino kwa msonkhano wapaderawu ndikuwonetsa kuti akatswiri a LLNL akutsogola kwambiri padziko lonse lapansi, omangidwa pazaka zambiri pakupanga makina akulu kwambiri padziko lonse lapansi," atero a Scot Olivier, omwe akhala akuchita nawo ntchito ya LSST ya Lawrence Livermore kwazaka zopitilira khumi.

Malinga ndi LSST Corporation, kamera yadijito mu LSST ndiye kamera yayikulu kwambiri yomwe idamangidwa. Mapangidwe omaliza azikhala a 1.65 x 3 mita ndikulemera 2,800 kg. Ndi chithunzi chachikulu, chowoneka bwino kwambiri chomwe chimatha kuwona kuwala kuchokera ku ultraviolet pafupi ndi infrared.

Akasonkhanitsidwa, magalasi a L1 ndi L2 amakhala mu mawonekedwe a Optics kutsogolo kwa thupi la kamera; L3 ipanga zenera lolowera ku cryostat ya kamera, yokhala ndi ndege yake yoyendera komanso zamagetsi zogwirizana nazo.

Zoyenera kutsata zofunikira

Pulogalamu ya Kamera ya digito ya CCD kujambula zithunzi zomwe zimawonedwa ndi makina owonera kwambiri a telescope, iwowo a kapangidwe kazithunzi zazithunzi zitatukuphatikiza magalasi oyambira a 8.4-mita, 3.4-mita yachiwiri ndi mita 5 tertiary. Kuwala koyamba ku LSST kumayembekezeredwa mu 2020, ndikuyamba kugwira ntchito kuyambira 2022.

Kupanga kamera yadijito yomwe ingakwaniritse zolinga zapamwamba za LSST kwapangitsa LLNL kuthana ndi zovuta zingapo, malinga ndi gulu la projekiti. Makina omaliza a detector amagwiritsa ntchito zithunzi za 189 16-megapixel silicon detectors zomwe zidakonzedwa pa "ma rafts" 21 kuti apereke chiwonetsero chonse cha ma gigapixels 3.2.

Kamera imatenga masekondi 15 pamasekondi 20 aliwonse, ndi telescope yomwe imasindikizidwanso ndikukhazikika m'masekondi asanu, ikufuna kapangidwe kochepa kwambiri komanso kolimba. Izi zikutanthauzanso nambala yocheperako ya f, komanso kuyang'ana mozama kwa kamera.

Zolemba za LSST zikuwonetsa kuti kuwonekera kwa masekondi 15 ndikunyengerera kuti anthu aziona komwe kukulephera komanso kusuntha. Kuwonekera kwakanthawi kocheperako kumachepetsa kuchuluka kwa makamera owerengera ndi kuyikanso ma telescope, kulola kulingalira kozama, koma zinthu zoyenda mwachangu komanso pafupi-ndi Earth zitha kusunthika kwambiri pakuwonekera. Malo aliwonse omwe ali kumwamba ayenera kujambulidwa ndi kuwonekera kwachiwiri kwachiwiri motsatizana, kukana kugunda kwa ma cosmic pama CCD.

"Nthawi iliyonse mukachita zochitika koyamba, pamakhala zovuta, ndipo kupanga kwa mandala a LSST L1 sikunakhale kosiyana," adatero Justin Wolfe wa LLNL. “Mukugwira ntchito ndi kapu yagalasi yopitilira mamita asanu komanso mainchesi anayi okha. Kusasamala, kugwedezeka kapena ngozi iliyonse kumatha kuwononga mandala. Magalasi ndi ntchito yaukatswiri ndipo tonsefe ndife onyadira chifukwa chake. ”


Post nthawi: Oct-31-2019