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Electronics progress report

By J.W. Heyd and P.E. Ohmart


The Argonne National Laboratory model of the Vibrating Reed Electrometer was installed in the laboratory of Group 3 to detect the point at which electrodeposition of a radioactive element begins. As now set up, the Vibrating Reed Electrometer has a direct reading sensitivity of 10{sup {minus}12} amperes and this can be increased to 10{sup {minus}17} amperes by using it as a rate of charge instrument. During the past month the ionization chamber was designed and constructed and the complete system was set up for operation. One four-input gamma mixer was completed. Inputs for the GM tubes are on the back of the chassis with mixer output on the front panel, convenient to the Instrument Development Laboratory Model 162 GM input. The performance, on test, was equal to that of the prototype (EL-208). Two thyratron heater controls, EL-238 and EL-241 were completed and are being tested by the Assay Group. Three Scaler-Multipliers, scale of 16,384, are under construction. Two Instrument Development Laboratory methane-flow scalers were modified as outlined in the Electronics Progress Report, MLM-153, dated July 1--31, 1948. A portable power supply tester is being developed which will embody a simplified switching arrangement. Some trouble has been encountered in getting a satisfactory polish on the polystyrene insulators for the Underwater Electrometer. A single thermocouple type Micromax recorder has been used by the Production Research Group to control the temperature of a bath. Data for the static operating conditions of 6J6 tubes are being compiled to facilitate the design of a new scaling circuit for the high-rate neutron counter

Topics: Radiation Detectors, Recording Systems, Mound Laboratory, Radioactive Materials, Process Control, 36 Materials Science, Historical Aspects, Control Systems, Electrometers, Measuring Instruments, Power Supplies, Temperature Control, Electrodeposition, Amplifiers, Fabrication, 44 Instrumentation, Including Nuclear And Particle Detectors, Nuclear Weapons, 45 Military Technology, Weaponry, And National Defense
Publisher: Monsanto Research Corp., Miamisburg, OH (United States)
Year: 1948
DOI identifier: 10.2172/132718
OAI identifier:
Provided by: UNT Digital Library
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