Fusion energy calorimeter for the tokamak fusion test reactor Page: 5 of 7
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insulated calorimeter could undergo a AT of several in series, perhaps made of Pt-Rh wires; the thermo-
ten' of degrees during a multihour run at a duty pile response would be of the order of 100 oV for
actor of the order of 0.01. dT = 0.1'C. While thermistors would be much more
sensitive, thermistor measurements have been gen-
?auterin Plasmas erally found to be irreproducible or even incom-
prehensible when the thermistors are located in
If ae stipulate that AT = 0.01'C is the minimum intense radiation fields.'
temperature change needed for a usefully accurate
measurement, then it appears that the calorimeter
technique will always be marginal for use with
deuterium.only plasmas in the FTR, unless the
fusion pulse length is at least several seconds. 05-0.33 .0
However, if heat losses from the working medium 02 wnd"
can be made very small, then AT could be built up
from pulse to pulse, and might achieve interesting 01
values in deuterium-only operation even with 1-s
puses, after 04 to 134 of nath plses. At any . o, Neore
rate, the calorimeter technique could be used r .amhv A6bm6'
with predominantly deuterium plasmas containing ,o
at least a few per cent of tritium. .02
n either D-T or D-D operation, AT could be ao.l
multiplied substantially by seeding the working
'edium with fissionable material. However, the 5 noes
:latbration would then depend partly on neutronics
:alculatnons, and would be sensitive to the spec-
trum of the incident neutrons.) d s a xo x
t m > is
E 'meat l " id ti rs "0'"
<oer e a s era o
"emperature increases will be measured by ther-
moolles and oiatinum-resistance thermometers dis-
tributed along the major radial axis and at other
positions, as 'd'cated in Fig. 2. An appropriate
tnenoo1ie would tcrsst if about 20 thermocouples
Uaedn pMn nausE ,.
Fig. 5. Esoected temperature increase oer 0-4
fusion pulse, averaged through the front
10 css of the calorimeter, as a function of
fusion neutron fluence per pulse. Operating
modes are defined in Table 2.
.:cr't 'soS -.':E E 1ttVt!Ieu1' .- A, 1E "-'P
SOS '2- - -
't.e'va1 vet-peen sna s 5 :o ')T5
217 'ci' , 'ta '2.1
-- 5.;)~ -
a'-14e5 -uio 'ntrons
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Jassby, D.L. & Imel, G.R. Fusion energy calorimeter for the tokamak fusion test reactor, report, April 1, 1981; New Jersey. (https://digital.library.unt.edu/ark:/67531/metadc1211995/m1/5/: accessed April 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.