APPENDIX D: IMP DETECTOR HISTORY The table below gives, for each detector used in the project, the IMP in which the detector was installed, the area factor, the location measured, and comments. Blanks in a column mean that the information is the same as above. Naming an island as the IMP location means that stakes were being measured on that island during the dates shown. Inclusive dates do not necessarily mean the Measurements were made on each date included. The physical location of the detector is shown. Thus, for soil screening, the location is the IMP or Crypt shed, or Belle, rather than the island from which the soil sample was obtained. The origin of the sample is sometimes noted in the comments. The serial number of the detector in use is recorded at position 32 of the data array stored for each IMP measurement, for all measurements taken after March 28, 1978. Prior to that date, the IMP serial number, which is stored in position 8, may be used along with the tabular data, to associate detector and site measured. Date IMP Area Factor Location Comment DETECTOR 386 (Radiation Lab IG2) 1977 6/20 7/7 8/21 12/26-12/28 - 1.00* PGT 1.00 Las Vegas 3 Janet Pearl Shipped to Enewetak on IMP 3 Sally Irene In use on islands noted, together with detector 393 Ene wetak Evacuation for Typhoon Mary Vera Olive 3 Test Date Area Factor = 0.99; 1978 1/2-1/4 3 Sally 1/7 1/12 1/17-1/19 1/20-1/23 3 1 1 3 1/25 1&3 1/27,1/28 3 Janet 1/30-1/31 2/1-2/3 3 Janet 1/24 1/26 3 Janet IMP Shed 1 Tropical Storm Nadine Replaced cables to detector Detector iced up De-iced No signal thru Replaced preamp - OK on IMP 1} Malfunction/wide Am peak/ to Radiation Lab Working but replace preamp Bad peak shape/Adjust amplifier *Value assigned. For area factors within 5% of the previously reported or assigned value, no change in area factor was made.