RESEARCH AND DESIGN STUDIES OF A RADIATION HARDENED SAMPLED DATA SYSTEM.
Abstract
A radiation-hardened data recording system has been designed, constructed, and tested. The objectives of this study were to evaluate design trade-offs and to develop a system hardened against both transient and permanent radiation effects within the trade-off limitations. A data sampling and recording technique was used whic periodically samples the input signal waveshape and stores the instantaneous voltage level in a memory bank for subsequent data read-out and reduction. The technique provides variable-rate sampling to optimize data acquisition versus storage requirements. The origingal signal waveshape can be reconstructed from the stored voltage samples extracted from the memory bank. The fabricated Sampled Data System was irradiated at the Physics International Flash X-Ray Facility to determine the radiation hardness of the circuits in short-pulse ionizing radiation environments. The 10 Mc circuits exhibited a radiation hardness up to 3 to 6 x 10 to the 10th power rads (Si) per second. The 1.0 Mc and 100 kc circuits remained unaffected at the maximum achieved dose rate of 1 x 10 to the 11th power rads (Si) per second. The system was also irradiated in a TRIGA MARK 2 nuclear reactor environment. The regulated power supply exhibited a radiation hardness in excess of the total neutron fluence of 9.7 x 10 to the 14th power Nvt( greater than 10 KEV). The data sampling circuits exhibited a one percent to six percent error for a 1 x 10 to the 14th power Nvt total neutron fluence. Data analysis indicates that this threshold level can be extended to the 10 to the 15th power Nvt range. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1966
- Accession Number
- AD0484769
Entities
People
- R. M. Orndorff
Organizations
- Hughes Aircraft Company