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- W2008802657 abstract "The purpose of the experiment is to measure the oxygen and carbon dioxide content of the earth's atmosphere to determine if there is a decrease or increase with the passing of time (years). This newly developed data acquisition and manipulation system operates as follows: Measurement is accomplished by placing two samples of air in the path of an argon laser. The light particles emitted from the samples are transmitted to two photomultiplier tubes (PMTs A and B) through a set of mirrors and a focusing arrangement. There is a mechanical shutter-wheel placed in front of the PMTs to alternate the unknown and standard light particles proceeding to the PMTs. The outputs of the PMTs are shaped to a fast NIM standard signal and applied to a CAMAC 12 channel, 100 MHz scaler (A to channel 0, B to channel 1). An eight millisecond gate is used to enable the A and B detectors. The position of the shutter-wheel is determined by synrhronization pulses scribed on the wheel. The 1 sync pulse represents the unknown data while the 2 sync pulse is the standard data. The two Sync pulses are applied to a Quad Counting Register (channel 0). A Gate pulse is applied to channel 1 of the Quad Register to represent the number of actual A and B (unknown/standard) pairs of data presented to the Data Acquisition System. An Inhibit signal is used to sync the LSI-11/2 computer to obtain the Sync, A and B Data, and Gate signals." @default.
- W2008802657 created "2016-06-24" @default.
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- W2008802657 date "1981-01-01" @default.
- W2008802657 modified "2023-10-16" @default.
- W2008802657 title "Computerized Oxygen and Carbon Dioxide Detector" @default.
- W2008802657 doi "https://doi.org/10.1109/tns.1981.4331875" @default.
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