德國ALV公司提供ALV-700X系列多tau數(shù)字相關(guān)器采用兩/四多tau數(shù)字相關(guān)方案(8 / 16),自相關(guān)和互相關(guān)模式,提供兩個(ALV-7002)或者四個(ALV-7004、ALV-7004/F)獨(dú)立的相關(guān)通道,相關(guān)函數(shù)實(shí)時計(jì)算。
該產(chǎn)品有兩個TTL輸入,50歐姆的阻抗(2V…5V),小于5ns的脈沖對的分辨率,三個用戶可切換的LVTTL輸出(3.3 V,10 Ma/個),并提供可選的時鐘發(fā)生器,±0.5ppm的頻率漂移,±0.25ppm的初始頻率精度采用多通道跟蹤,同步快速將輸入計(jì)數(shù)率信息記錄到硬盤,USB2.0接口到主機(jī)有10兆字節(jié)/秒的數(shù)據(jù)傳輸能力,儀器有堅(jiān)固的鋁合金外殼,符合RoHS。
其主要參數(shù)如下:
采樣時間下限:100ns(ALV-7002),25ns(ALV-7004),3.125ns(ALV-7004/F)
滯后時間范圍:100ns…219902.4s(ALV-7002),25ns…54975.6s(ALV-7004),3.125ns…54975.6s(ALV-7004/F)
輸入計(jì)數(shù)率:ALV-7002:35Mcps(90 MCPS峰值),ALV-7004和ALV-7004/F:80Mcps(160 MCPS峰值)
部分論文:
1. Philip Born et al., Drop Tower Setup for Dynamic Light Scattering in Dense Gas-Fluidized Granular Media, Microgravity Science and Technology, 28(4), 2016;
2. Steffen, W. et al., Anisotropic hindered motion close to an interface studied by resonance-enhanced dynamic light scattering , New Journal of Physics, 12(10), 2010;
3. L.W. Zhou et al., Short time dynamic structure formation of carbon-doped TiO2 ER fluids with different conducivity using diffusing wave sepctroscopy, International Journal of Modern Physics B, 16(17), 2002.