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Title:
OPERATION IVY, PROJECT 6.1 - AIR SHOCK PRESSURE-TIME VS DISTANCE, PACIFIC PROVING GROUNDS, NOVEMBER 1952 (DELETED)
Author(s):
ROLLOSSON, G W [SANDIA LABORATORY, SANDIA, NM]
Subject Terms:
IVY OPERATION; MIKE EVENT; KING EVENT; SHOCK WAVES; BLAST EFFECTS; MEASURING METHODS; DATA; TIME OF ARRIVAL
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:
1953 Apr 30
Declassification Status:
Sanitized
Document Pages:
0068
Accession Number:
NV0051286
Document Number(s):
WT602EX
Originating Research Org.:
SANDIA LABORATORY, SANDIA, NM
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
AIR-PRESSURE MEASUREMENTS ON OPERATION IVY WERE UNIQUE IN TWO RESPECTS : DETONATION OF THE FIRST "SUPERBOMB" ON MIKE SHOT PRESENTED AN OPPOR TUNITY TO VERIFY EXPERIMENTALLY THE APPLICABILITY OF THE W**1/3 SCALIN G LAW AT LARGER YIELDS THAN EVER BEFORE; AND ON KING SHOT IT WAS POSSI BLE TO OBSERVE SIMULTANEOUSLY THE DEVELOPMENT OF THE SHOCK WAVEFORM OV ER LAND AND OVER WATER. MEASUREMENTS ON MIKE SHOT WERE SUCCESSFUL, WI TH THE EXCEPTION THAT NO OVERPRESSURE DATA WERE OBTAINED AT PRESSURE L EVELS GREATER THAN 20 POUNDS PER SQUARE INCH. IT IS RECOMMENDED THAT EFFORTS TO REPEAT THESE MEASUREMENTS BE MADE AT THE EARLIEST OPPORTUNI TY. MEASUREMENTS ON KING SHOT WERE QUITE SUCCESSFUL IN THAT IT WAS FO UND THAT THE WAVEFORM OVER WATER WAS NEARLY IDEAL, WHEREAS THAT OVER L AND OBVIOUSLY WAS SUBJECT TO SOME DETERIORATION AS A RESULT OF THE THE RMAL EFFECT AND PRECURSOR FORMATION. ANALYSIS OF THE RESULTS MADE POS SIBLE SEVERAL SIGNIFICANT CONCLUSIONS, THE MOST IMPORTANT OF WHICH WER E: (1) THE SCALING LAW IS APPARENTLY VALID FOR RADIOCHEMICAL (RC) YIE LDS AS GREAT AS 10 MT. (2) OVERPRESSURES FROM MIKE SHOT ARE EVIDENTLY IN AGREEMENT WITH THE ASSUMPTION THAT THE OVERPRESSURES TO BE EXPECTE D FROM A YIELD, W, BURST AT THE SURFACE OF A PERFECT REFLECTOR, ARE TH E SAME AS WOULD BE OBSERVED FROM A YIELD OF 2W, BURST IN FREE AIR. (3 ) AGREEMENT OF THE RESULTS FROM BOTH MIKE AND KING SHOTS WITH THOSE PR EDICTED FROM THE HEIGHT-OF-BURST CHART PUBLISHED IN TM 23-200 JUSTIFIE S EXTENSION OF THIS CHART TO YIELDS OF THE ORDER OF 500 KT. THE CORRE CTION APPLIED IN THIS CHART FOR THERMAL EFFECTS ALSO APPEARS VALID. A PPENDIX A TO THIS REPORT DESCRIBES SEMIQUANTITATIVE MEASUREMENTS OF SH OCK SYMMETRY, AND FROM ALL INDICATIONS THE SHOCK WAVE WAS SYMMETRICAL ALONG THE TWO RADII CHOSEN FOR THESE MEASUREMENTS.


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