Installation for adiabatic demagnetization experiments at the National Bureau of Standards

of Research of the National Bureau of Standards Grid Plate Calibration at the National Bureau of Standards January - February 1988

National Bureau of Standards Gaithersburg, MD 20899 Grid plates are calibrated by a completely automated high precision measuring machine which uses a computer vision system to detect and locate the grid marks. The system routinely calibrates plates of up to 600x600 millimeters with accuracies of 0.5 micrometers. Descriptions of the system components, level of performance and tests of the absol...

High-Frequency Scatter Sounding Experiments at the National Bureau of Standards.

Computer Development at the National Bureau of Standards

The first fully operational stored-program electronic computer in the United States was built at the National Bureau of Standards. The Standards Electronic Automatic Computer (SEAC) [1] (Fig. 1.) began useful computation in May 1950. The stored program was held in the machine’s internal memory where the machine itself could modify it for successive stages of a computation. This made a dramatic ...

A Report on the National Bureau of Standards pH Standards

In 1980, the research program in pH was re-established at the National Bureau of Standards (NBS). This report describes the state of this research, as well as the state of the NBS pH standards. The thermodynamic definition and the determination of pH are elaborated. The problems of liquid junction potentials encountered in the practical determination of pH are discussed. The goal of the researc...

of Research of the National Bureau of Standards Room Temperature Gold - Vacuum - Gold Tunneling Experiments

An experiment has been completed which demonstrated quantum mechanical tunneling of electrons between two gold electrodes separated in vacuum. The tunneling current between the gold electrodes has been measured, for fixed voltages of 0.1 and 0.01 volts, as the electrode spacing was varied from a distance of approximately 2.0 nm down to a point where the electrodes touched. Current changes of ov...