Nako ea Beijing ka Phato 12 3:31 PM, ho thakholoa sesupa-tsela sa Historic Park Sun (Parker Solar Probe) se Cape Canaveral Air Force Base slc-37b se qalileng ka lirokete tse boima tsa Delta 4. Ka mor’a leeto la sefofane la metsotso e 43, le hoja nako eo e bile le boemo ba boraro ba ho belaelloang hore ke tahlehelo ea nako e thabisang, ka lehlohonolo ke eona mefosi ea ho qetela, Parker detector e atlehileng ho arohana le rokete, ea beha leoto tseleng e telele e eang letsatsing, ’me kahoo ea bula leeto le lecha la ho hlahloba letsatsi ha motho!
Mohloli oa Letsatsi
Qala sebaka
Ho theha tlaleho ea lefats'e ea ho fihla sebakeng se haufi le letsatsi, batho ba tlameha ho fumana lisebelisoa tse ka mamellang maemo a mocheso a holimo haholo. Ho ka boleloa hore haeba ho se na tsamaiso ea mocheso oa mocheso (TPS), ha ho na Parker. Ho ea ka morero, Parker o tla kena lik'hilomithara tse limilione tse 4 ho tloha sebakeng sa letsatsi (lik'hilomithara tse limilione tse 6.11). E le hore se ikamahanye le tikoloho ena e chesang haholo, sebuela-pele se tla nka tšireletso ea mocheso e kopantsoeng, 'me sebaka sena se tla mamella mahlaseli a letsatsi. Thebe ea mocheso e ne e ke ke ea etsoa lilemo tse 10 tse fetileng.
Haeba u le 1 square meter sathelaete ho Earth orbit, 'me matla a letsatsi a ka bang 1350 watts ho fihla ho uena, empa Parker e haufi ka makhetlo a 25 ho feta boemo bona, e leng hoo e ka bang 850,000 watts ea mocheso ka square meter. Haeba sebaka se baloa, sebaka sa motlakase sa Parker se tlameha ho mamella li-watts tse ka bang limilione tse 3 tsa matla. Thebe ea mocheso ea mochine o boetse o tsejoa e le Thermal Protection system (TPS), e nang le likarolo tse peli tse entsoeng ka carbon-enhanced composite le carbon foam e nang le clamp e bohareng e ka bang 4.5 inches (11.43cm). Thebe ea mocheso e shebaneng le Letsatsi e boetse e na le lesela le khethehileng le lesoeu ho bonahatsa matla a tsoang letsatsing ka hohle kamoo ho ka khonehang. Thepa ena e hanyetsana le likhato tse 2,500 tsa Fahrenheit (hoo e ka bang 1371 ℃) 'me e etsa bonnete ba hore sesebelisoa se sebetsa ka likhato tse ka bang 85 tsa Fahrenheit (hoo e ka bang 30 ℃).
"Haeba mosebetsi ona o ne o le lilemong tsa bo-60 ho isa ho bo-70, esita le ha o ne o sebelisoa lilemong tsa bo-80, ho ka khoneha ho fofa litšepe tse phahameng tse sa keneleng mocheso," ho boletse Driesman. "Bo-rasaense ba tla haha Jerdon ea tšepe e nang le ntlha e phahameng haholo ea ho qhibiliha, empa le ka mohla u se ke ua e romela leholimong, hobane tšepe e boima haholo." Ho fapana le mefuta e mengata ea khoebo ea k'habone, sebopeho sa bona sa carbon-carbon ha se polymerized ka li-resin tse thata hobane li-resin tse thata li fetoha mouoane haufi le letsatsi joaloka oli holim'a litsela tse chesang, "o ile a re. ka ontong ea likhato tse 3,000, 'me u pheta ts'ebetso ka makhetlo a 4 ho isa ho a 5 "Qetellong u tla fumana fiber ea carbon e u pota-potileng. Sebopeho sa carbon-carbon eo re buang ka eona ke carbon e hloekileng, e se nang li-resin le lintho tse ling. "Mahlakore a ka pele le a ka morao a thebe ea mocheso a entsoe ka poleiti ena ea carbon-carbon, eo, ntle le ho kenngoa ha insulated, e na le matla a matla haholo a mochine." Likarolo tse 2 tsa lishiti tsa carbon-carbon li tšesaane hoo li ka kobehang esita le ho fetana. Bohareng ba lisebelisoa tse peli tsa carbon-carbon, lesela le ka bang 4,5 inches ea carbon foam, eo hona joale e sebelisoang ka kakaretso indastering ea bongaka ho theha masapo a mang. Moralo oa sandwich o tšehetsa sebopeho kaofela-joalo ka masenke-e boima ba lik'hilograma tse 160 feela (hoo e ka bang 73kg) bakeng sa thebe eohle ea mocheso oa maoto a 8-botenya.
Foam hape ke sebopeho sa bohlokoahali sa ts'ebetso ea ho kenya thebe ea mocheso. Empa 97% ea carbon bubble ke moea, molemong oa ho fokotsa boima ba lisebelisoa tsa sebaka. Khabone ka boeona e tsamaisa mocheso, 'me sebopeho sa foam se boetse se bolela hore ha ho na mocheso o mongata o lokelang ho fetisoa. Li-bubble ha li bonolo ho li hlahloba, li brittle haholo. Empa ho na le bothata bo bong. "Ha li chesa, lia chesa." "Ho boletse Abel. Ho chesa ha se bothata bo boholo ka har'a vacuum, empa moea o setseng tekong o tla etsa hore li-bubble li chese ka mashala. Ka hona, National Oak Ridge Laboratory Engineers e nang le mabone a phahameng a mocheso a plasma arc ho hlahloba tšireletso ea mocheso oa carbon foam e phahameng ea mocheso o hanyetsanang le mocheso o phahameng. Thermal insulation e hlokehang ea lisebelisoa tsena tsa carbon ke tiisetso e lekaneng ea hore mocheso o lekaneng o ke ke oa khona ho lemoha foam ea carbon. ha ho na ho senyeha ha moea sebakeng, tsela e le 'ngoe feela ea ho qhala mocheso ke ho hasanya leseli le ho ntša mocheso ka mokhoa oa photon Ka hona, ho hlokahala lesela le leng le sireletsang: lera le lesoeu le sireletsang le sebelisetsoa ho bonahatsa mocheso le khanya.
Parker Solar Detector sets'oants'o sa moralo oa thebe ea mocheso
Ho fihlela sena, Applied Physics Laboratory Univesithing ea Johns Hopkins le Advanced Technology Laboratory ea Whiting School of Engineering (Advanced Technology Laboratory in Johns Hopkins University ' s whiting School Engineering) e thehile sehlopha sa lihlopha tsa litsebi tsa lihlopha tse sireletsang mocheso tse koahelang mocheso, tse nang le lipatlisiso tsa sehlopha sa lik'hemik'hale tse nang le mocheso o phahameng oa mocheso le lik'hemik'hale tsa plasma. Ka tlhahlobo e eketsehileng, qetellong sehlopha se ile sa khetha lera le lesoeu la tšireletso le thehiloeng ho alumina. Empa lera le sireletsang le ne le tla putswa sebakeng sa mocheso o phahameng ka lebaka la khabone, kahoo lienjiniere li ile tsa eketsa lesela la tungsten bohareng, le le tšesaane ho feta moriri, 'me le apesitsoe pakeng tsa thebe ea mocheso le thebe e tšoeu ho thibela ho sebelisana pakeng tsa lihlopha tse peli. Ba boetse ba eketsa nano-doping agent ho etsa hore lithebe li be tšoeu le ho thibela ho atolosoa ha mocheso oa likaroloana tsa alumina. Dennis Nagle, moenjineri ea ka sehloohong oa lipatlisiso Setsing sa Saense ea Sisteme le Boenjiniere, o boletse hore hangata ha ho sebelisoa lirafshoa, ho ratoa lesela le thata, le nang le masoba, empa thepa e robeha ha e otloa ka hamore. Mocheso oo Parker a shebaneng le oona, lesela le boreleli le robeha joalo ka fensetere e otliloeng ka majoe. Ka hona, esita le liaparo tsa porous li ka mamella tikoloho ena e feteletseng. Ha mapetsong a hlaha mapetsong a masoba, mapetsong a emisa ha a fihla masobeng. Ho roala ho na le lihlopha tse 'maloa tse mahoashe tsa granular-e lekaneng ho lumella sehlopha sa likaroloana tsa ceramic ho bonahatsa leseli le sieo ho tloha karolong e' ngoe.
Nako ea poso: Aug-15-2018