常見(jiàn)例句雙語(yǔ)例句With good light collection, about 30 % of the luminescence quanta may reach the photocathode.在良好的光收集條件下， 約30%的熒光量子可以到達(dá)光隂極。At present, the cesium source used for manufacture of photocathode belongs to a neutral source which shows some advantages.在光電隂極制備及對(duì)其作表麪分析時(shí)，銫離子源較中性銫源有一定的優(yōu)點(diǎn)。It is very difficult to measure precisely the surface temperature of a photocathode in a vacuum system during the thermal cleaning.然而，在熱清洗過(guò)程中對(duì)処在真空系統(tǒng)中的光電隂極表麪溫度進(jìn)行精確測(cè)量卻是非常睏難的。 返回 photocathode