Electron Temperature Measurements Using a Two-Filter Soft X-ray Array in VEST
A multichannel soft X-ray (SXR) array has been developed to measure the electron temperature in the Versatile Experiment Spherical Torus (VEST). To estimate electron temperature using the two-filter method applied to SXR intensity, we designed a pinhole camera that has two photodiode arrays with dif...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/20/8357 |
| _version_ | 1797572334198980608 |
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| author | M. W. Lee S. Lim W. Jeong S. Kim J. H. Kim Y. S. Hwang C. Sung |
| author_facet | M. W. Lee S. Lim W. Jeong S. Kim J. H. Kim Y. S. Hwang C. Sung |
| author_sort | M. W. Lee |
| collection | DOAJ |
| description | A multichannel soft X-ray (SXR) array has been developed to measure the electron temperature in the Versatile Experiment Spherical Torus (VEST). To estimate electron temperature using the two-filter method applied to SXR intensity, we designed a pinhole camera that has two photodiode arrays with different metallic filters. We also adopted a filter wheel and tested various filter parameters to find the optimal filter set. Through tests, the combination of aluminum and beryllium was found to be the most suitable for the current experimental conditions in VEST. The filtered SXR signals were acquired with a low-noise preamplifier, exhibiting sufficient signal-to-noise ratios for electron temperature estimation based on the intensity ratio of two signals obtained with different filters. The estimated electron temperature from the developed two-filter SXR array showed reasonably matched levels and consistent trends with Thomson scattering measurements. Error contribution from impurity line emission is also discussed. |
| first_indexed | 2024-03-10T20:54:47Z |
| format | Article |
| id | doaj.art-7f9ddc208c3e402eafe43ba4ae9b597e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T20:54:47Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-7f9ddc208c3e402eafe43ba4ae9b597e2023-11-19T18:01:38ZengMDPI AGSensors1424-82202023-10-012320835710.3390/s23208357Electron Temperature Measurements Using a Two-Filter Soft X-ray Array in VESTM. W. Lee0S. Lim1W. Jeong2S. Kim3J. H. Kim4Y. S. Hwang5C. Sung6Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of KoreaDepartment of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of KoreaDepartment of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of KoreaDepartment of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of KoreaDepartment of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of KoreaDepartment of Energy Systems Engineering, Seoul National University, Seoul 08826, Republic of KoreaDepartment of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of KoreaA multichannel soft X-ray (SXR) array has been developed to measure the electron temperature in the Versatile Experiment Spherical Torus (VEST). To estimate electron temperature using the two-filter method applied to SXR intensity, we designed a pinhole camera that has two photodiode arrays with different metallic filters. We also adopted a filter wheel and tested various filter parameters to find the optimal filter set. Through tests, the combination of aluminum and beryllium was found to be the most suitable for the current experimental conditions in VEST. The filtered SXR signals were acquired with a low-noise preamplifier, exhibiting sufficient signal-to-noise ratios for electron temperature estimation based on the intensity ratio of two signals obtained with different filters. The estimated electron temperature from the developed two-filter SXR array showed reasonably matched levels and consistent trends with Thomson scattering measurements. Error contribution from impurity line emission is also discussed.https://www.mdpi.com/1424-8220/23/20/8357soft X-raytwo-filter methodelectron temperaturebremsstrahlungAXUV |
| spellingShingle | M. W. Lee S. Lim W. Jeong S. Kim J. H. Kim Y. S. Hwang C. Sung Electron Temperature Measurements Using a Two-Filter Soft X-ray Array in VEST Sensors soft X-ray two-filter method electron temperature bremsstrahlung AXUV |
| title | Electron Temperature Measurements Using a Two-Filter Soft X-ray Array in VEST |
| title_full | Electron Temperature Measurements Using a Two-Filter Soft X-ray Array in VEST |
| title_fullStr | Electron Temperature Measurements Using a Two-Filter Soft X-ray Array in VEST |
| title_full_unstemmed | Electron Temperature Measurements Using a Two-Filter Soft X-ray Array in VEST |
| title_short | Electron Temperature Measurements Using a Two-Filter Soft X-ray Array in VEST |
| title_sort | electron temperature measurements using a two filter soft x ray array in vest |
| topic | soft X-ray two-filter method electron temperature bremsstrahlung AXUV |
| url | https://www.mdpi.com/1424-8220/23/20/8357 |
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