Document Details


Title:
OPERATION HARDTACK - PROJECT 2.7, NUCLEAR RADIATION FROM A DETONATION AT VERY-HIGH ALTITUDE (DELETED)
Author(s):
CALDWELL, P A [NAVAL RESEARCH LABORATORY, U.S.]; ALERS, P [NAVAL RESEARCH LABORATORY, U.S.]; DRACHMAN, R J [NAVAL RESEARCH LABORATORY, U.S.]; HANSCOME, T D [NAVAL RESEARCH LABORATORY, U.S.]; WADDEL, R C [NAVAL RESEARCH LABORATORY, U.S.]; HOLMGREN, H D [NAVAL RESEARCH LABORATORY, U.S.]; PEARSE, C A [NAVAL RESEARCH LABORATORY, U.S.]; PENNICK, J R [NAVAL RESEARCH LABORATORY, U.S.]
Subject Terms:
HARDTACK I OPERATION; MEASURING METHODS; RADIATIONS; MEASURING INSTRUMENTS; SPECTROSCOPY
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:
1958 Jul 18
Declassification Status:
Sanitized
Document Pages:
0039
Accession Number:
NV0051004
Document Number(s):
ITR1624EX
Originating Research Org.:
NAVAL RESEARCH LABORATORY, U.S.
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE OBJECTIVE WAS TO MEASURE THE NEUTRON SPECTRUM AND TOTAL PROMPT GAM MA RAY FLUX PRODUCED BY THE DETONATION OF A NUCLEAR DEVICE OF LOW YIEL D AT AN ALTITUDE OF ABOUT 90,000 FEET. THIS INFORMATION WAS TO BE OBTA INED BY SUITABLE DETECTORS IN THE VICINITY OF THE NUCLEAR DEVICE AND T ELEMETERED TO THE GROUND TO BE RECORDED AND SUBSEQUENTLY ANALYZED. THE THEORY AND INSTRUMENTATION FOR MEASUREMENT OF NEUTRON SPECTRUM AND TO TAL PROMPT-GAMMA-RAY FLUX FROM A NUCLEAR DEVICE DETONATED AT AN ALTITU DE OF 85,000 FEET IS DESCRIBED. MEASUREMENT OF NEUTRON TIME OF FLIGHT WITH A LITHIUM-6 IODINE SCINTILLATOR-PHOTODIODE DETECTOR, WITH A SIMIL AR LITHIUM-6 DETECTOR FOR GAMMA-RAY CORRECTION THE LITHIUM-6 DETECTOR, WAS PLANNED. THE MEASUREMENT WAS TO HAVE EXTENDED TO PLUS 120 MILLISE C. A CALCIUMIODIDE SCINTILLATION DETECTOR, WHOSE OUTPUT WAS INTEGRATED FOR THE FIRST 10 MICROSEC AFTER THE ZERO TIEM, AND A POTASSIAM BROMID E CRYSTAL, WHOSE DARKENING WAS MEASURED AS A FUNCTION OF TIME FOR 120 MILLISEC AFTER ZERO TIME, WERE TO BE USED TO DETECT GAMMA FLUX. THE DE TECTOR OUTPUT WERE TO HAVE BEEN ELECTRONICALLY ENCODED AND RECORDED ON A MAGNETIC-TAPE RECORDER PROGRAMMED TO RECORD FOR 120 MILLISEC AFTER ZERO TIME, REDUCE ITS SPEED TO 1/16 OF THE RECORDING SPEED, AND CONTI NUOUSLY PLAY BACK THE DATA. THE RECORDER OUTPUT MODULATED A 70-KILOCOL UOMLE VOLTAGE-CONTROLLED OSCILLATOR USED IN A STANDARD FREQUENCY-MODUL ATED TELEMETERING SYSTEM. A GROUND STATION RECEIVED AND RECORDED THE S IGNAL. THE BENDIX COMMAND SYSTEM SHARED BY THIS PROJECT AND PROJECTS 1 .10 AND 8.2 FAILED, AND NO DATA WAS OBTAINED.


<< Return to Search Results