Document Details


Title:
OPERATION HARDTACK, REPORT TO THE SCIENTIFIC DIRECTOR: POWER-TIME AND TOTAL-THERMAL MEASUREMENTS (DELETED)
Author(s):
HANSEN, D F [NAVAL RESEARCH LABORATORY, U.S.]; PERRY, J E [NAVAL RESEARCH LABORATORY, U.S.]; ROCKMAN, A G [NAVAL RESEARCH LABORATORY, U.S.]
Subject Terms:
HARDTACK I OPERATION; THERMAL RADIATION; TEAK EVENT; MEASURING METHODS; ENERGY
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1960 Feb 28
Declassification Status:
Sanitized
Document Pages:
0048
Accession Number:
NV0051023
Document Number(s):
WT1690EX
Originating Research Org.:
NAVAL RESEARCH LABORATORY, U.S.
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THERMAL POWER AS A FUNCTION OF TIME AND TOTAL THERMAL YIELD MEASUREMEN TS WERE MADE ON A TEAK AND ORANGE SHOTS AT OPERATION HARDTACK (NEWSREE L). THE POWER-TIME MEASUREMENTS WERE PERFORMED WITH FOUR BOLOMETER-CH OPPER UNITS. A LARGE DYNAMIC RANGE WAS PROVIDED BOTH ELECTRONICALLY A ND BY NEUTRAL FILTERS. BECAUSE OF SCALING, ONLY ONE BOLOMETER SYSTEM PROVIDED GOOD RESULTS ON TEAK SHOT, WHILE TWO DID ON ORANGE SHOT. THE FIRST 10 MICROS SEC OF THESE RECORDS IS AMBIGUOUS BECAUSE OF A BLOCKI NG ACTION PRODUCED IN THE AMPLIFIER OF EACH SYSTEM BY A FIDUCIAL MARKE R GENERATOR. THE DATA AFTER THAT TIME INDICATE THAT THE THERMAL POWER FOR ORANGE SHOWED A SLIGHT "MINIMUM" WHICH IN SURFACE DETONATIONS IS A PRONOUNCED CHARACTERISTIC. TEAK SHOT AT TWICE THE ALTITUDE, OR 250, 000 FEET, SHOWED NO TRACE OF A MINIMUM. ITS THERMAL OUTPUT ROSE TO A MAXIMUM AND DECAYED ALMOST EXPONENTIALLY. THE TOTAL THERMAL YIELD OF TEAK SHOT WAS AS MEASURED BY THERMOPILE-RECORDER SYSTEM S. THERMAL ENERGY INCIDENT ON THE GROUND AT JOHNSTON ISLAND FROM TEAK SHOT WAS AND FOR ORANGE SHOT . THE TOTAL THERM AL YIELD FOR ORANGE COULD NOT BE DETERMINED BECAUSE OF THE CLOUD COVER PRESENT OVER JOHNSTON ISLAND.


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