Order number 940406-165953-13 page 39 -001-001 set 5 with 341 of 341 items 371. 34. 950. PUB. DATE (YYMMDD) CLASSIF. LEVEL TEXT ABSTRACT 801. KEYWORD (S) 511200 Secret Item 71 150. REPORT NUMBER 70. 710. PERSONAL AUTHOR (M) 110. PRIMARY TITLE (M) wr--51 Measurement of x rays. Part III. Engineering aspects. Annex 1.8 [of] scientific director’s report of atomic weapon tests at Eniwetok, 1951. Operation Greenhouse CORPORATE SOURCE Bradner, H. California Univ., Radiation Lab. Berkeley (USA). Lawrence 371. PUB. DATE (YYMMDD) 510900 34. CLASSIF. LEVEL TEXT Secret 950. ABSTRACT The engineering details of the equipment used in the x-ray measurements of George and Easy Bursts are described. The details discussed are: (1) weapon position on the tower, (2) vacuum systems, (3) primary collimators, (4) shadow shields, (5) blockhouse, (6) detector tanks and radiation traps, (7) fluorescer foils, (8) shovels, (9) storage condensers and flexible lines, (10) triggers, (11) recording stations, (12) photography, (13) electronics, and (14) cable shielding. The primary effort of the project was the x-ray measurements of George Burst. The secondary effort involved Easy Burst, and the objective was to make background measurements 9003236