三、正电子技术的发展 口数字化 口大型综合化 口平台化
ϝǃℷ⬉ᄤᡔᴃⱘথሩ ᭄࣪ᄫ ࣪㓐ড়ൟ ࣪ৄᑇ
1探测技术数字化 ●数字示波器 ●数据采集卡
1.⌟ᡔᴃ᭄ᄫ࣪ ᭄ᄫ⼎⊶఼ ᭄䞛䲚व
用数字示波器做采集卡 Digital measurement of positron lifetime K.Rytsola,J.Nissila,J.Kokkonen,A.Laakso,R.Aavikko,K.Saarinen Laboratory of Phrysies,Heisinki Universiry of Technology.P.O.Box 1100.FIN-02015 HUT.Espoo.Finland Applied Surface Science 194 (2002)260-263 e e
⫼᭄ᄫ⼎⊶఼خ䞛䲚व
Dynode Dynode Anode Start d Stop Anode [ Delay Pulse combiner Input Oscilloscope Ethernet Pc Trigger Disc Coinc Disc Fig.1.Schematic diagram of a 'first generation'digital positron lifetime spectrometer. e
Detector: Plastic 30 X 20mm3 cylindrial scintillators Philips XP2020 PMT Digital oscilloscope Tektronix TDS 3052,5GS/s,500MHz) Pulses at 200 ps intervals,leading into about 100 samples per pulse
Detector: Plastic φ30h20mm3 cylindrial scintillators Philips XP2020 PMT Digital oscilloscope Tektronix TDS 3052, 5GS/s, 500MHz) Pulses at 200 ps intervals, leading into about 100 samples per pulse.