Overview and first measurements of the MAST Upgrade bolometer diagnostic

Lovell, J.; Reinke, M. L.; Field, A. R.; Lomanowski, B. A.

doi:10.1063/5.0128750

Overview and first measurements of the MAST Upgrade bolometer diagnostic

Journal Article · Wed Feb 22 00:00:00 EST 2023 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/5.0128750· OSTI ID:1959616

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Commonwealth Fusion Systems, Cambridge, MA (United States)
Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Here, a suite of multi-channel resistive bolometers has been implemented to measure the total radiation from Mega Amp Spherical Tokamak Upgrade plasmas, with cameras covering the core plasma and lower divertor chamber. Data are digitized and processed using novel field-programmable gate array-based electronics, offering improved compactness and new operational capabilities. A synthetic diagnostic has been developed to explore the quality of 2D reconstructions available from the system and to quantify the uncertainty on quantities such as the total radiated power. Measurements in the first campaign have demonstrated correct functioning of the diagnostic while also highlighting issues with electrical noise and some failure mechanisms of the detectors, as well as significant neutral beam fast-particle losses.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: Engineering and Physical Sciences Research Council (EPSRC); USDOE; USDOE Office of Science (SC)

Contributing Organization:: MAST Upgrade Team

Grant/Contract Number:: AC05-00OR22725; SC0014264

OSTI ID:: 1959616

Alternate ID(s):: OSTI ID: 1958240

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 94; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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