Replicate Curve Analysis: Consensus and Uncertainty

Overlay of replicated 2D21 curve digitizations

ALT: Overlay of three independent digitizations of the seven control-grid current families of the 2D21 thyratron.

Caption: Overlay of the points obtained from three independent digitizations of the GE graph. Their overall agreement provides a direct indication of the reproducibility of the digitization process.

Description:

Comparison of the three sources used to digitize the General Electric 2D21 (I_g(V_g)) characteristics. Families for (I_a=5,25,50,100,150,200,300 mathrm{mA}) are shown. CSV row order is ignored and each source is treated as an independent unlabelled point cloud.

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Consensus curves of the 2D21 grid-current characteristics

ALT: Consensus 2D21 grid-current curves obtained from replicated digitizations for anode currents from 5 to 300 mA.

Caption: Consensus curves obtained by combining replicated digitizations of the GE 2D21 characteristics. Each family represents the final curve used in the subsequent model analysis.

Description:

Consensus reconstruction of the seven 2D21 (I_g(V_g)) families. For each anode current, the analysis combines the different digitizations only over their common voltage domain, without extrapolation, and produces a uniform representation for subsequent fitting and residual analysis.

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Uncertainty components of the digitized 2D21 curves

ALT: Within, between, and total uncertainty of the digitized 2D21 curves as a function of control-grid voltage.

Caption: Estimated uncertainty components along each family: dispersion within individual digitizations, differences between independent digitizations, and the resulting total uncertainty.

Description:

Variation of (sigma_{mathrm{within}}), (sigma_{mathrm{between}}), and (sigma_{mathrm{total}}) with (V_g) for the different anode-current families. Uncertainty increases mainly in the steepest regions of the curves and is particularly large for the (300 mathrm{mA}) family.

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Uncertainty comparison across the 2D21 current families

ALT: RMS comparison of within, between, and total uncertainty for the seven 2D21 anode-current families.

Caption: Summary of uncertainty by family. Characteristics from 5 to 200 mA show relatively limited dispersion, while the 300 mA family has substantially greater uncertainty.

Description:

Comparison of the RMS values of (sigma_{mathrm{within}}), (sigma_{mathrm{between}}), and (sigma_{mathrm{total}}) for (I_a=5,25,50,100,150,200,300 mathrm{mA}). The plot clearly highlights the different quality of the 300 mA family, which has a shorter available domain and much greater dispersion than the other curves.

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