Document Details


Title:
OPERATION HARDTACK - PROJECT 2.6, NEUTRON FLUX FROM VERY-HIGH-ALTITUDE BURSTS (DELETED)
Author(s):
HANSCOME, T D [NAVAL RESEARCH LABORATORY, U.S.]; ALERS, P B [NAVAL RESEARCH LABORATORY, U.S.]; CALDWELL, P A [NAVAL RESEARCH LABORATORY, U.S.]; DRACHMAN, R J [NAVAL RESEARCH LABORATORY, U.S.]; GORBICS, S G [NAVAL RESEARCH LABORATORY, U.S.]; HOLMGREN, H D [NAVAL RESEARCH LABORATORY, U.S.]; JONES, E C [NAVAL RESEARCH LABORATORY, U.S.]; PEARSE, C A [NAVAL RESEARCH LABORATORY, U.S.]; WADDEL, R C [NAVAL RESEARCH LABORATORY, U.S.]
Subject Terms:
HARDTACK I OPERATION; ATMOSPHERIC EXPLOSIONS; NEUTRONS; RADIATION FLUX; TEAK EVENT; ORANGE EVENT; MEASURING METHODS; GAMMA RADIATION
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:
1961 May 31
Declassification Status:
Sanitized
Document Pages:
0097
Accession Number:
NV0051051
Document Number(s):
WT1623EX
Originating Research Org.:
NAVAL RESEARCH LABORATORY, U.S.
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE PRIMARY OBJECTIVE WAS TO MEASURE NEUTRON FLUX AND GAMMA-RAY FLUX V ERSUS RANGE AND TIME FROM MISSILEBORNE, MEGATON NUCLEAR DETONATIONS (S HOTS ORANGE AND TEAK) AT HIGH ALTITUDES BY MEANS OF INSTRUMENTED PODS THAT WERE TO BE EJECTED, DURING THE MISSILE THRUST PERIOD, AT TIMES TH AT WERE SELECTED TO POSITION THE PODS AT PREDETERMINED DISTANCES FROM THE BURST. FOR EACH SHOT, A REDSTONE MISSILE CARRIED ALOFT [ ] ALONG WITH THREE INSTRUMENTATION PODS THAT WERE EJECTED BALLISTICALLY AT PREDETERMINED TIMES. THE NEUTRON SPECTRUM OF THE DEVICE WAS MEASU RED BY THE TIME-OF-FLIGHT METHOD. PLASTIC SCINTILLATORS WERE USED FOR MEASURING THE FAST-FUSION NEUTRONS; LITHIUM-6 OXIDE SCINTILLATORS, TH E SLOWER, FISSION NEUTRONS; NORMAL LITHIUM IODIDE SCINTILLATORS, THE G THE PRIMARY OBJECTIVE WAS TO MEASURE NEUTRON FLUX AND GAMMA-RAY FLUX V ERSUS RANGE AND TIME FROM MISSILEBORNE, MEGATON NUCLEAR DETONATIONS (S HOTS ORANGE AND TEAK) AT HIGH ALTITUDES BY MEANS OF INSTRUMENTED PODS THAT WERE TO BE EJECTED, DURING THE MISSILE THRUST PERIOD, AT TIMES TH AT WERE SELECTED TO POSITION THE PODS AT PREDETERMINED DISTANCES FROM THE BURST. FOR EACH SHOT, A REDSTONE MISSILE CARRIED ALOFT { } ALONG WITH THREE INSTRUMENTATION PODS THAT WERE EJECTED BALLISTICALLY AT PREDETERMINED TIMES. THE NEUTRON SPECTRUM OF THE DEVICE WAS MEASUR ED BY THE TIME-OF-FLIGHT METHOD. PLASTIC SCINTILLATORS WERE USED FOR MEASURING THE FAST-FUSION NEUTRON; LITHIUM-6 IODIDE SCINTILLATORS, THE SLOWER, FISSION NEUTRONS; NORMAL LITHIUM IODIDE SCINTILLATORS, THE GA MMA-RAY BACKGROUND; CESIUM IODIDE SCINTILLATORS, THE PROMPT GAMMA-RAY INTEGRAL; POTASSIUM BROMIDE DETECTORS, THE INTEGRATED GAMMA-RAY DOSE; AND NONSCINTILLATOR BLANKS, ANY INTERFERING SIGNALS SUCH AS ELECTROMAG NETIC OR GAMMA-RAY BACKGROUND EFFECTS. NEUTRON DATA WAS OBTAINED FROM PODS 3 AND 4 DURING SHOT TEAK AND POD 4 DURING SHOT ORANGE, WHICH WER E AT SLANT RANGES OF 15.84, 53.74, AND 29.45 KM, RESPECTIVELY AT THE T IMES OF DETONATION. THE PEAK 14-MEV NEUTRON FLUX RATE AT TEAK POD 3 W AS FOUND { }. THE MEASURED FLUX OF NEUTRONS, WITH E NERGIES BETWEEN 3 AND 12 MEV, FOR TEAK POD 3 WAS { }. SIMIL ARLY, THE MEASURED 3-TO-12 MEV NEUTRON FLUX AT TEAK POD 4 WAS ABOUT { } AND AT ORANGE POD 4 WAS { }. WITH A CONVERSION FACTOR OF 5.5 E-08 REP/(N/SQUARED CM) FOR THE 3-TO-12-MEV REGION AND W ITH A RELATIVE BIOLOGICAL EFFECTIVENESS (RBE) FACTOR OF 10, THE FAST-N EUTRON DOSE AT TEAK POD 4 (22 8-KM ALTITUDE) IS FOUND { } AN D AT ORANGE POD 4 (20.01-KM ALTITUDE) { }. THE ALTITUDES OF BOTH OF THESE PODS ARE, OF COURSE, ACCESSIBLE TO MANNED AIRCRAFT. { } TOTAL GAMMA DOSES FROM 0 TO 120 MSEC { } WERE MEASURED AT TEAK PODS 2, 3, AND 4, RESPECTIVELY. ORANG E POD 4 OVER THE SAME TIME INTERVAL RECEIVED A GAMMA-RAY DOSE { }. TELEMETRY (MEGA-C) SIGNAL STRENGTHS OF ALL PODS WERE MEASURED DURING T HEIR LIFETIMES. THE SIGNAL LEVELS OF PODS 4, FOR BOTH SHOTS, RECOVERE D TO THEIR PRESHOT LEVELS WITHIN 0.1 SECOND AFTER BURST. THE SIGNALS FROM PODS 2 AND 3 WERE BLACKED OUT (FELL BELOW NOISE LEVEL) FOR APPROX IMATELY 45 SECONDS FOR SHOT TEAK AND 20 SECONDS FOR SHOT ORANGE.


<< Return to Search Results