Design and simulation of a wire position monitor for cryogenicsystems in an ADS linac

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ZHU Hong-Yan, DONG Lan and LI Bo. Design and simulation of a wire position monitor for cryogenicsystems in an ADS linac[J]. Chinese Physics C, 2014, 38(8): 087001. doi: 10.1088/1674-1137/38/8/087001
ZHU Hong-Yan, DONG Lan and LI Bo. Design and simulation of a wire position monitor for cryogenicsystems in an ADS linac[J]. Chinese Physics C, 2014, 38(8): 087001.  doi: 10.1088/1674-1137/38/8/087001 shu
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Received: 2013-10-09
Revised: 2014-01-25
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Design and simulation of a wire position monitor for cryogenicsystems in an ADS linac

    Corresponding author: ZHU Hong-Yan,

Abstract: This paper introduces the design and simulation of a Wire Position Monitor (WPM) used in the cryogenic system of an Accelerator Driven System (ADS). The WPM is designed to monitor the contraction of cold masses during the cooling-down operation. In this paper, POISSON-2D electrostatic field software is used to calculate the best characteristic impedance for the WPM. Furthermore, the time domain signal of different end structures is theoretically analyzed and simulated. The coupling of electrodes and the influence of signal carrier size, which may influence the induced signal, are also discussed. Finally, the linearity of the induced voltage and the sensitivity of the WPM are analyzed. The time domain simulation results are consistent with the theoretical analysis. The influences of the coupling and carrier size are very small, and the linearity of the normalized voltage is good within r/2.

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