Recent advances in ECE imaging performance
ECE Imaging (ECEI) systems have been installed and are presently operating on the KSTAR, DIII-D, ASDEX-UG, and HT-7 tokamaks. All are inherently 2-D systems, collecting second harmonic ECE radiation to form temporally-resolved localized T sub(e) images. System resolutions range from 16 x 8 (HT-7 and...
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Published in | Journal of instrumentation Vol. 7; no. 2; pp. 1 - 9 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
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01.02.2012
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Abstract | ECE Imaging (ECEI) systems have been installed and are presently operating on the KSTAR, DIII-D, ASDEX-UG, and HT-7 tokamaks. All are inherently 2-D systems, collecting second harmonic ECE radiation to form temporally-resolved localized T sub(e) images. System resolutions range from 16 x 8 (HT-7 and ASDEX-UG) to 20 x 16 (DIII-D) to 24 x 16 (KSTAR), with a spatial resolution as low as 1.0 cm (vertical) by 0.9 cm (radial), and with video bandwidths up to 400 kHz. Noise and drift performance of ECEI systems installed on KSTAR and DIII-D were significantly improved in 2011 with new zero bias detectors. This higher level of performance has resulted in new physics advances as ECEI is employed to visualize high temperature plasmas from the plasma edge (pedestal region) through the plasma core, with examples presented herein. In addition to these systems, a new expanded view ECEI system has been developed for the EAST tokamak that produces 24 x 16 T sub(e) images from a single imaging array and which is currently being commissioned. |
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AbstractList | ECE Imaging (ECEI) systems have been installed and are presently operating on the KSTAR, DIII-D, ASDEX-UG, and HT-7 tokamaks. All are inherently 2-D systems, collecting second harmonic ECE radiation to form temporally-resolved localized T sub(e) images. System resolutions range from 16 x 8 (HT-7 and ASDEX-UG) to 20 x 16 (DIII-D) to 24 x 16 (KSTAR), with a spatial resolution as low as 1.0 cm (vertical) by 0.9 cm (radial), and with video bandwidths up to 400 kHz. Noise and drift performance of ECEI systems installed on KSTAR and DIII-D were significantly improved in 2011 with new zero bias detectors. This higher level of performance has resulted in new physics advances as ECEI is employed to visualize high temperature plasmas from the plasma edge (pedestal region) through the plasma core, with examples presented herein. In addition to these systems, a new expanded view ECEI system has been developed for the EAST tokamak that produces 24 x 16 T sub(e) images from a single imaging array and which is currently being commissioned. |
Author | Yu, L Che, S Luhmann, NC Jr Yu, C X Tobias, B Park, H Domier, C W Kong, X |
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Cites_doi | 10.1063/1.3460456 10.1103/PhysRevLett.107.045004 10.13182/FST08-A1675 10.1063/1.3478637 10.1063/1.873144 10.1063/1.3483209 10.1585/pfr.6.2106042 10.1088/0741-3335/39/11/001 10.1063/1.2352727 10.1088/1009-0630/8/1/17 10.1063/1.1316748 10.1063/1.3483214 10.1063/1.3233913 10.1103/PhysRevLett.106.075003 |
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Title | Recent advances in ECE imaging performance |
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