SUORET
HURON)
Project 15.2 = High spew
Photography - Time Interval Measurement -G, Felt
. L. Allen
The decision to fire «oi (Huron) at Fniwetok Atoll made it
necessary for Program 23 (UCRL) to perform the high speed photographic
time interval measurement.
2301.
The observations were made from Station
Seven Model 190 streak cameras were employed.
The time interval
between the primary anjegecondary reaction has been preliminarilymeasur-
he camera schedule, which relates
—
a
to the accompanying figure s, is given in Table 15.2-1, The figures are
contact prints of the records obtained and illustrate many interesting
details of the luminous phenomena associated with the detonation,
the
usual gamma and neutron Teller flashes are seen as is the fireball
growth in its earliest stages,
TABLE 15,2-~1 - CAMFRA SCHEDULE
Fig. No.
Writing Speed
Telescope Focal
Length
1
10.2 mys
2
15.1
*
240
3
10.4
"
4
10.5
5
5.4
6
7
COPIED/DOE
LANL RC
Slit Width
Inches Time sh
2025
3.6
*
2025
2.4
60
*
0025
3.6
#
*
240
4A
050
72
"
CO
40
*
2025
7.2
n
5.4
240
*
-050
W.4
®
60
*
025
3.6
10.3
="
60 inches
Field of
View
.
oo.
ig «
|
.
Slit vertical,
device near
lower end.
Slit horiz.,
aimed above device
.
Slit vertical
device near
- lower end,
Ro
ne 5
a 2 oo ; n
o
a