Some Characteristics of the 1B41, 1B45, and 1B49 Series Spark Gaps
Abstract
Operation of concentric, cylindrical electrode, aluminum cathode type series spark gaps at SCI and AEW conditions is discussed. These gaps are shown to be satisfactory for operation under several combinations of high power, high repetition rate, and high pressure; but that in general the voltage ranges which can be relied on over 500 hours is quite small for operation at high values of these quantities taken simultaneously. In all cases, attempts to reduce the time jitter to the order of 1% of the pulse width have been unsuccessful. Jitter of 1 to 3 microsec is to be expected. The impulse ratio of these gaps when now for a 20 kv/microsec rate of rise of voltage increases from 1.62 to 1.93 in raising the pressure from 90 to 250 cm. During operation at 1155 pps. 1 microsec, and 21 kv in a 50 ohm circuit, the pressure of gaps filled initially to 150 cm has been observed to decrease by as much as 8.8%. This decrease is found to be due largely to the loss of hydrogen and not argon. However, changes in pressure due to loss of gas during operation have a relatively small affect on the range as determined by refilling and retesting gaps after 500 hours operation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 19, 1946
- Accession Number
- ADA801576
Entities
People
- Joseph E. Dillinger
Organizations
- Massachusetts Institute of Technology