MEASUREMENT OF INTENSE BEAMS OF THERMAL RADIATION

Journal Article · Tue Apr 01 04:00:00 EST 1958 · J. Opt. Soc. Amer.

DOI:https://doi.org/10.1364/JOSA.48.000344· OSTI ID:4339889

Broido, A; Willoughby, A B

Thermal radiation calorimeters have been constructed with relatively thick receivers which permit the direct recordg of integrated thermal energy dose as a function of time. However, it is shown that with proper receiver design the rate of change of recorded temperature can be made proportional to the rate of delivery of energy within a reasonably short time constant. Thus, differentiation of the recorded temperature data will give an accurate picture of the irradiance-time history of an impinging pulse. Several hundred calorimeters have been successfully used, both in the laboratory and in the field, to measure, with a time constant of 20 milliseconds or less, radiant energy pulses up to 100 cal/sq cm with peak irradiances up to 200 cal/sq cm/sec. The primary advantages of the instruments are that they are small, simple, rugged, and that they provide a signal which may be recorded without complex simplification equipment directly on a high speed oscillographic recorder. (auth)

• Research Organization: U.S. Naval Radiological Defense Lab., San Francisco
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-009285
• OSTI ID: 4339889
• Journal Information: J. Opt. Soc. Amer., Journal Name: J. Opt. Soc. Amer. Vol. Vol: 48
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BEAMS
CALORIMETERS
INSTRUMENTS
INTEGRATORS
MEASURED VALUES
PHYSICS
PLANNING
RECORDING SYSTEMS
RESOLUTION
THERMAL RADIATION
USES
VARIATIONS