ay
A note of special interest is thet some indication of the fireball
size as a function of yield is found in » compsrison of the ERT data of
2ae een
rerates =
e burns f 1'd.d. were produced
the present shot Lerg
by exposure to the FA «t Runit
__
At essentially the same distance, much
smaller lesions averaging only 1/4 dyd. were produced at Japtan by the near
:
nominal weapon,
At this distance the smail difference of 1/2mile has a nesligible effect
upon the size of the image of the fireball upon the retina,
Stargered Shutters
These shutters were open at zero time and closed in pairs at intervals
increasing by 10 msec through 100 msec,
The remainder of this series, also
open at zero time, closed in pairs at 120, 250, and 1000 msec.
The exact
time of closing will be determined at a ‘ater date from evaluation of the
high speed photogrephy sccomplished during the flesh interval.
The time for
the minimur following the first pulse is celeulated at 50 + 2 msec.
It is
of interest that 4 of 15 rabbits received burns during this period.
In
fact, 2 animals appear to have sustained retinal damage as early as the
first 10 msee of the flash,
burning duri
At compsreble distances the incidence of
the first pulse alone (0 to 11 oseRE <>< 0 to
) is about 25 percent for both shots,
50 msec
All of the lesions from the first wave of the power pulse were mild
and small, ranging from pin~point to ebout 1/3 d.d. in size.
No burns
were produced behind shutters open in the range between O to 60 and O to
250 msec except in one case at the latter limit where a small double burn
occurred,
This apparent inconsistency in the data is unexplained at the
wae
ue
-
29
-
er
XW
moment.