Requirements for ITER diagnostics Page: 4 of 20
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TABLE 1.1 - POSSIBLE OPERATING PHASES FOR TTER
OPERATIONAL PLASMA IGNITION &
CONDmONS OPTIMIZATION DRIVEN
yearly y 2ar2 year 3 year 4 year5 yer6
H/He H/He D/D/He D/T DfT D/f
Initial ohmic Phyrias Uldes; 'Flash' igiin
opermion; Steady-Mate uudie; Uudiea;
Ful-fieW and He-pampig a-particle sudies;
hcuaig Systems Mesr Curfeat drie studies He ash removal;
and profdle 200 s controlled
MHD tets for Driver bMaetd & Nl
liquid moeal Waakcs prcessig system;
Divenizr tesr; Wall material study;
Test blanket dich-ow; Neronie tls
llamle-n maiucmance Remeie miwecaance
yea 7 year a
ShI, -term blanket
Surveillance tess a1
* 1.2 years
LONG-TERM CONCEPT VERIFICATION TESTS
year 9 year 10 year I1 year 12
DfT D/T D/T DfT
Engiwerirg 1q.uwam reiabiliiy data;
Composer reliably data.
Blanket fode performance tests;
Fuel procesrag reliability dala;
Mterial irradaialion epeCrimcnt'.
Tranient safely tets
Continued sureilance testing.
year 3 years la - l8
This phase can craninue
furtlier d ccewury
Esperan etal campagnv include cnmbinatirns of long-erm easts
(several yeas each) and sunrt-tcrm tests (- - year)
Fig. 2. The operating program planned for the ITER Device.
devoted to establishing the plasma parameters necessary for achieving ITER's
Figure 2 shows a simplified chart of the operational plan. While one does not
expect the program to have quite such a clean break between the physics phase and the
technology phase but be rather more evolutionary, the plan points out key-issues such
as that the repair and maintenance at the vacuum vessel will have to be done with
remote-handling equipment. Also, the full ignition will be studied in the physics phase
since the understanding of the central alpha-heating on the plasma behavior is key to the
technology operation. Thus, it is apparent that all plasma diagnostics for the physics
phase must function to specification in the highest radiation fluxes, even if some need
not withstand long-term radiation damage effects in the integrated fluence of the
technology phase. The size of penetrations that can be allowed through the blanket and
shield modules close to the plasma will depend on the pulse-length scenarios chosen,
because radiation damage and nuclear heating of the TF coils must be limited /4/.
Five of the horizontal access ports are available for diagnostics in the physics
phase. A proposed arrangement of all the diagnostics described for this .phase is shown
in Fig. 3. This sketch is a projection onto the ITER equatorial plane of all the
diagnostics, including those mounted on the top or viewing through the pumping
access at the bottom. In order to maximize the blanket testing and tritium breeding in
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Young, K.M. Requirements for ITER diagnostics, article, January 1, 1991; New Jersey. (https://digital.library.unt.edu/ark:/67531/metadc1054270/m1/4/: accessed April 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.