Automated Hall Effect Experiment Data Acquisition System (AHEEDAS).
Abstract
The Air Force Materials Laboratory conducts experiments using the Hall effect to characterize the electrical properties and impurity levels of silicon samples. Both the van der Pauw and the classical Hall bar methods are used. The purpose of this study was the development of an Automated Hall Effect Experiment Data Acquisition System (AHEEDAS) to control the conduct of the experiment and to reduce all of the necessary data. The designed system is capable of controlling all aspects of the experiment except the temperature. The AHEEDAS produces as output, sample resistivity, Hall mobility, carrier concentration, and the Hall coefficient as a function of temperature. These are stored in data files on floppy disk storage along with all of the raw data from the experiment. The output is also printed on the computer terminal as the experiment is done. An LSI-11 microcomputer with 28K words of memory is used to control the experiment. Software was developed to allow this system to handle the acquisition and processing of data. The AHEEDAS was successfully implemented and tested. All functions other than the temperature control are fully operational. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1979
- Accession Number
- ADA080175
Entities
People
- Edgar Alphonse Verchot Jr
Organizations
- Air Force Institute of Technology