Cov ncauj lus kom ntxaws kev ua tau zoo ntawm cov cuab yeej pom kev hmo ntuj
Thaum cov electrons dhau los ntawm cov yeeb nkab, cov atoms hauv cov yeeb nkab yuav tso tawm cov electrons zoo sib xws, cov naj npawb ntawm cov uas yog thawj tus naj npawb ntawm cov hluav taws xob sib npaug los ntawm qhov tseem ceeb (txog ob peb txhiab zaus). Qhov no tuaj yeem ua tiav siv lub phaj microchannel (MCP) hauv cov yeeb nkab. Ua haujlwm. Lub phaj microchannel yog lub iav me me uas muaj ntau lab lub qhov hws me me (microchannels) ua los ntawm fiber ntau optic technology. Lub phaj microchannel yog nyob rau hauv lub tshuab nqus tsev, nrog cov hlau electrodes mounted ntawm ob sab ntawm lub disk. Txhua microchannel yog kwv yees li 45 npaug ntev dua nws qhov dav thiab ua haujlwm zoo li lub tshuab hluav taws xob.
Thaum cov electrons los ntawm photocathode ntaus thawj electrode ntawm lub microchannel phaj, cov electrons yog ceev los ntawm lub iav microchannel nyob rau hauv qhov kev txiav txim ntawm ib tug high voltage ntawm 5, 000 volts ntawm ob lub electrodes. Thaum cov electrons dhau los ntawm microchannel, ntau txhiab tus electrons hauv cov channel yuav raug tso tawm, txheej txheem hu ua cascade Secondary emission. Cias muab, cov thawj electrons ntaus ob sab ntawm microchannel, thiab cov atoms zoo siab ces tso tawm ntau electrons. Cov hluav taws xob tshiab no tseem ntaus lwm cov atoms, ua rau cov tshuaj tiv thaiv kab mob uas ib txhais tes ntawm electrons nkag mus rau microchannel thiab ntau txhiab tus electrons tawm mus. Ib qho tshwm sim nthuav yog tias lub microchannel ntawm MCP muaj lub kaum sab xis me ntsis (txog 5-8 degree), uas tsis yog tsuas yog ua rau cov hluav taws xob sib tsoo, tab sis kuj txo cov ion tawm tswv yim thiab cov lus pom ncaj qha los ntawm phosphor txheej ntawm tso zis kawg.
Hmo ntuj pom kev dluab paub rau lawv eerie ntsuab ci.
Thaum kawg ntawm daim duab intensifier raj, cov electrons tsoo lub phosphor-coated screen. Cov electrons tuav lawv txoj haujlwm txheeb ze thaum lawv dhau los ntawm microchannel, uas ua kom cov duab tseem nyob tsis zoo vim tias cov electrons tau teem rau tib txoj kev uas cov photons tau tsim los. Lub zog nqa los ntawm cov electrons no ua rau cov phosphor mus txog lub xeev zoo siab thiab tso tawm photons. Cov phosphor no tsim cov duab ntsuab ntawm qhov screen, uas yog ib qho ntawm cov khoom siv thaum hmo ntuj. Los ntawm lwm cov lo ntsiab muag hu ua eyepieces, cov duab phosphorescent ntsuab tuaj yeem pom, thiab lub ntsej muag kuj tuaj yeem siv los nthuav cov duab lossis kho qhov tsom. NVD tuaj yeem txuas nrog cov khoom siv hluav taws xob, xws li saib, lossis cov duab tuaj yeem pom ncaj qha los ntawm lub qhov muag.
