Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometry
An upgraded local oscillator (LO) hopping calibration method based on a blackbody hot source and a perturbation analysis of the magnetic field difference method are introduced in this work. The blackbody hot source is used to evaluate the difference in the relative coefficients between the two LO ho...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2023/03/epjconf_ec212023_03009.pdf |
| _version_ | 1797894089350316032 |
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| author | Yu Xin Shi Zhongbing Yang Zengchen Jiang Min Chen Wei Wang Tianbo Pan Wenan |
| author_facet | Yu Xin Shi Zhongbing Yang Zengchen Jiang Min Chen Wei Wang Tianbo Pan Wenan |
| author_sort | Yu Xin |
| collection | DOAJ |
| description | An upgraded local oscillator (LO) hopping calibration method based on a blackbody hot source and a perturbation analysis of the magnetic field difference method are introduced in this work. The blackbody hot source is used to evaluate the difference in the relative coefficients between the two LO hopping frequencies in the same channels. Then the coefficients are obtained by multiplying the LO hopping frequencies coefficients by LO hopping calibration coefficients. In this way, it is more flexible and stable than the in-situ calibration. The magnetic field difference method provides another calibration method to obtain the relative calibration coefficients of the electron cyclotron emission radiometers (ECE). In general, the magnetic field difference method needs two similar shots but with a difference of 2.1% (for HL-2M) in the magnetic field. Meanwhile, there are some errors because of the deviation of detection positions in the same channels between the two shots. For evaluating the calibration errors, the impact of the displacement, Te perturbation of the core region, and magnetic field difference has been discussed. The result shows that a larger magnetic field difference can improve the accuracy of the calibration. In the end, Bayesian inference has been utilized to evaluate the calibration coefficients and get the most probable calibration coefficients along with its the confidence interval. |
| first_indexed | 2024-04-10T07:03:18Z |
| format | Article |
| id | doaj.art-e464dac0b5c24f54bcbcc4a3972304d6 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-04-10T07:03:18Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-e464dac0b5c24f54bcbcc4a3972304d62023-02-27T15:17:49ZengEDP SciencesEPJ Web of Conferences2100-014X2023-01-012770300910.1051/epjconf/202327703009epjconf_ec212023_03009Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometryYu Xin0Shi Zhongbing1Yang Zengchen2Jiang Min3Chen Wei4Wang Tianbo5Pan Wenan6Southwestern Institute of PhysicsSouthwestern Institute of PhysicsSouthwestern Institute of PhysicsSouthwestern Institute of PhysicsSouthwestern Institute of PhysicsSouthwestern Institute of PhysicsSouthwestern Institute of PhysicsAn upgraded local oscillator (LO) hopping calibration method based on a blackbody hot source and a perturbation analysis of the magnetic field difference method are introduced in this work. The blackbody hot source is used to evaluate the difference in the relative coefficients between the two LO hopping frequencies in the same channels. Then the coefficients are obtained by multiplying the LO hopping frequencies coefficients by LO hopping calibration coefficients. In this way, it is more flexible and stable than the in-situ calibration. The magnetic field difference method provides another calibration method to obtain the relative calibration coefficients of the electron cyclotron emission radiometers (ECE). In general, the magnetic field difference method needs two similar shots but with a difference of 2.1% (for HL-2M) in the magnetic field. Meanwhile, there are some errors because of the deviation of detection positions in the same channels between the two shots. For evaluating the calibration errors, the impact of the displacement, Te perturbation of the core region, and magnetic field difference has been discussed. The result shows that a larger magnetic field difference can improve the accuracy of the calibration. In the end, Bayesian inference has been utilized to evaluate the calibration coefficients and get the most probable calibration coefficients along with its the confidence interval.https://www.epj-conferences.org/articles/epjconf/pdf/2023/03/epjconf_ec212023_03009.pdf |
| spellingShingle | Yu Xin Shi Zhongbing Yang Zengchen Jiang Min Chen Wei Wang Tianbo Pan Wenan Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometry EPJ Web of Conferences |
| title | Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometry |
| title_full | Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometry |
| title_fullStr | Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometry |
| title_full_unstemmed | Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometry |
| title_short | Upgrade of the relative calibration methods and Bayesian inference processing for electron cyclotron emission radiometry |
| title_sort | upgrade of the relative calibration methods and bayesian inference processing for electron cyclotron emission radiometry |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2023/03/epjconf_ec212023_03009.pdf |
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