Prototype design of a 700 °c in-vacuum blackbody source for in situ calibration of the ITER ECE diagnostic

TY - JOUR

T1 - Prototype design of a 700 °c in-vacuum blackbody source for in situ calibration of the ITER ECE diagnostic

AU - Ouroua, A.

AU - Beno, J.

AU - Bryant, A.

AU - Khodak, A.

AU - Phillips, P.

AU - Rowan, W.

AU - Taylor, G.

AU - Weeks, D.

N1 - Publisher Copyright: © 1973-2012 IEEE.

PY - 2018/5

Y1 - 2018/5

N2 - Two blackbody sources permanently located within the international thermonuclear experimental reactor (ITER) diagnostic shield module at equatorial port 9 will operate in conjunction with two remotely retractable mirrors to generate and direct blackbody radiation to calibrate the radial and oblique views of the ITER electron cyclotron emission diagnostic. The main calibration requirements include a high-emissivity surface heated to 700 °C or higher, the ability to perform the calibration in high vacuum and in the presence of a magnetic field, and 5000-h operational lifetime over 20 years. Major constraints include a heater current limit of 40 A, no direct fluid cooling to mitigate failure risks, small size to avoid compromising neutron shielding, and adequate structural support to mitigate vibration loads. This paper describes the preliminary design of a hot calibration source supported by analysis and test results of a calibration source test prototype developed to address the calibration source requirements and its constraints.

AB - Two blackbody sources permanently located within the international thermonuclear experimental reactor (ITER) diagnostic shield module at equatorial port 9 will operate in conjunction with two remotely retractable mirrors to generate and direct blackbody radiation to calibrate the radial and oblique views of the ITER electron cyclotron emission diagnostic. The main calibration requirements include a high-emissivity surface heated to 700 °C or higher, the ability to perform the calibration in high vacuum and in the presence of a magnetic field, and 5000-h operational lifetime over 20 years. Major constraints include a heater current limit of 40 A, no direct fluid cooling to mitigate failure risks, small size to avoid compromising neutron shielding, and adequate structural support to mitigate vibration loads. This paper describes the preliminary design of a hot calibration source supported by analysis and test results of a calibration source test prototype developed to address the calibration source requirements and its constraints.

KW - Electron cyclotron emission (ECE) diagnostic

KW - Hot calibration source

KW - International thermonuclear experimental reactor (ITER) tokamak

UR - https://www.scopus.com/pages/publications/85038825753

UR - https://www.scopus.com/pages/publications/85038825753#tab=citedBy

U2 - 10.1109/TPS.2017.2778160

DO - 10.1109/TPS.2017.2778160

M3 - Article

SN - 0093-3813

VL - 46

SP - 1239

EP - 1246

JO - IEEE Transactions on Plasma Science

JF - IEEE Transactions on Plasma Science

IS - 5

ER -