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Design and Simulation for Pre-amplifier of ITER Radial X-ray Camera

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Abstract

The radial X-ray camera, which is used to measure magnetohydrodynamic phenomenon and monitor edge localised mode events, is a key diagnostic system for physics studies in the international thermonuclear experimental reactor (ITER) tokamak. Considering the special requirements of physics measurements and spatial resolution, 144 detector channels are required. The board card of the pre-amplifier is designed to improve the integration, on which 16 signal channels have been integrated. In order to suppress the noise and improve the stability of the pre-amplifier, the target impedance analysis method is applied in the design of the power supply, the trans-impedance amplifier and a two-stage active low pass filter are applied in the design. Simulation with Cadence OrCAD and ANSYS SIwave has been adopted to optimize the characteristics of the pre-amplifier. A test of the pre-amplifier shows its good performance for ITER application. After optimization of the pre-amplifier, the band width is 270 kHz, the amplification is 107 V/A, and the noise attenuation is − 30 dB, the noise of the pre-amplifier is reduced to 10 mV (noise of the power supply is included).

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 11665002), PhD startup fund East China University of Technology (No. DHBK2017124), and Jiangxi Provincial Education Department Project (No. GJJ150558). We would like to thank all IO (ITER Organization) and DA (Domestic Agency) team members for the help to the design of the ITER RXC diagnostics system. And specifically, we would like to express our gratitude to DR. Antoine Sirinelli and DR. Robin Barnsley at IO of ITER for their suggestions on the work of electronics. The authors gratefully acknowledge the help of Ms DR. Tongzhen Fang at DA China of ITER, who has offered us valuable suggestion on work of RXC design.

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Authors and Affiliations

  1. Jiangxi Engineering Research Center for New Energy Technology and Equipment, East China University of Technology, Nanchang, People’s Republic of China

    Bin Zhang, Xiong Wei, Guang Zeng & Shan Zhang

  2. Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 350 Rd Shushanhu, Hefei, 230031, Anhui, People’s Republic of China

    Sheng Zhang

  3. University of Science and Technology of China, Hefei, People’s Republic of China

    Sheng Zhang

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  1. Bin Zhang
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  2. Xiong Wei
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  3. Sheng Zhang
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  4. Guang Zeng
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  5. Shan Zhang
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Correspondence to Sheng Zhang.

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Zhang, B., Wei, X., Zhang, S. et al. Design and Simulation for Pre-amplifier of ITER Radial X-ray Camera. J Fusion Energ 37, 136–143 (2018). https://doi.org/10.1007/s10894-018-0160-7

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  • DOI: https://doi.org/10.1007/s10894-018-0160-7

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