CG
The Z-rsy cabrrimecec< consisted of aluminca discs in weich cex=perarure~
seasing elements of aickel size were esdedled.
These were scented ia fom
plastic for trersal insulation and shock resistance.
The Deal Capacity of each
calorimeter was arcumd 0.5 cal/degree Centigrade and was Gan Co witaia j percent froma laboratory calculation.
These calorimeters required about le secools
Co reach theraal equilibriua.
Figuce 2.17 represents a sectional view of the cheraal radiation caloriseter,
Since these instruments wre subjected to high intensities of X-ray
energy, as well as all radiant energy of longer wavelengths, the absorbing surfaces were oecessarily sore elaborate than in the case of X-rays.
the Fig. 2.17 is o€ spun, polisbed aliminum.
Yoe cone ia
The outer shell is also of spun
alisicun, bit processed to a dull black surface.
These were both soldered ts
a copper base containing an ecbedded teaperature-seasing eleaent.
Upon entering the port, thermal energy reflected by the polished aluzina
cone is preferentially absorbed by the blackened side walls.
SNonreflectiag
wavelengths and X-rays are absorbed ax the poiat of incidence.
The high-
te=perature gradients produced ip the absorbing surfaces promote heat transfer
into che dSody of the mecal, resulcing in rapid surface cooling.
Thais, in con-
junction with the geometry of the cavity, nininizes beat losses by cadiation .
and surface vaporization.
The thermal radiation calorineters were designed
for a beat capacicy of around 20 cal/degree Centigrade, and the beat capacity
of each was measured to an accuracy of about 5 percent.
Prior to che operation, both types of transducers were exposed Co neutroa
aod gaya dosages exceeding those experienced from the ouclear burst.
Xo de-
tectable texperature increase or other change in characteristics was ooted.
Calibration sheets on each of the tecperature-sensing elements were furnished by che =asuiacturer.
Resistance-versus-te=perature checcs ~chich were
sicraed 2fcer the elements «ere exbedded ia rhe calorisecers failed to stow
any discrepancies from the original calibration.
The ast exacting seasurepents perforoed io che calidratiaa of beech t: pes
of transducers sere the seasurarents of their thercal sass or dcat capacity.
These were ceteraiogd scpateici, ive each ca
pusitioa.
ics Fissl sousted