. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. TIMERS, COUNTERS AND RATE MEASUREMENT the Trochotron and the PhiHps El T; they have the advantage of speed, in that count rates of the order of 200,000 per second are possible. The fastest glow tubes can count at about a tenth of this rate. For biological work the glow-discharge types are usually fast enough and it is not proposed to consider cathode ray counters further. As examples of the former, the Ericcson Dekatrons type GCIO B and GCIO D will be briefly discussed; the only operationa
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. TIMERS, COUNTERS AND RATE MEASUREMENT the Trochotron and the PhiHps El T; they have the advantage of speed, in that count rates of the order of 200,000 per second are possible. The fastest glow tubes can count at about a tenth of this rate. For biological work the glow-discharge types are usually fast enough and it is not proposed to consider cathode ray counters further. As examples of the former, the Ericcson Dekatrons type GCIO B and GCIO D will be briefly discussed; the only operational difference between these two tubes is their upper limiting counting speeds, 4,000 counts per second with the former, 20,000 counts per second with the latter. Anode First guides Second guides. i Cathode Output cathode Figure The GC 10 B—The GC 10 B comprises a central disc-shaped anode surrounded peripherally by 30 equally spaced rod-like electrodes. Electrodes 25 are connected together internally and brought to an external connection as 'cathodes'. Electrode 28 is brought out separately. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press
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