’ i / f [ h . i fo } of; ee i boat 1 ; | Je : CONTENTS : ABSTRACT : pope fh 7 ; / ! {| | Page Poy, e : : i ". ° . ° ° ° ° e 3 ACKNOWLEDGMENT . ° * . ° o ° . » . . ° 2 . e . . ry . ° 3 3 eo e . ° oe e ‘'§ e e 1 INTRODUCTION, . 2 MEASUREMENT LOCATIONS 4 5 6 7 ELECTROMETER . IONIZATION CHAMBER PROTECTIVE HOUSING CALIBRATION . . EQUIPMENT e 8 RESULTS es . 9 CONCLUSION. . . . . e . e ° * . e . * . . . e .” . . . . ° . . . . . . oe cd e e eo os . ‘ . . . ° e ° . 5 5 ‘ 5 6 6 6 7 7 ‘ { { ILLUSTRATIONS 4 1 Circuit diagram of logarithmic electrometer and accessories. 2 Exploded view of ionization chamber, . e 3 View of assembled chamber with electrometer housing. ° . 5 View of apparatus completely enclosed, 6 Mike fall-out inensity versus time. . . . 4 View of interior of housing containing the equipment. . . ° e . ° ° . 9 10 il 12 13 14