Fig. 1 Algorithm flowchart of the conventional method [6]
Fig. 2 Results of the main steps in the conventional method
Fig. 3 Linear and quadratic fitting characteristics for ideal mass spectrum and noise
Fig. 4 Ion signals of SF6 as input
Fig. 5 Configuration of signal blocks, PPE pre-correction, and result of the estimated Peak in the conventional method (k = 90)
Fig. 6 Configuration of signal blocks, PPE pre-correction, and result of the estimated Peak in the proposed method (k = 90)
Fig. 7 The mass spectrum of SF6 improved by the proposed method, (a) ion signals of residual gas used as input, (b) result of mass spectrum by the conventional method, (c) result of mass spectrum by the proposed method
Table. 1 Type and features of signal block corresponding to mass index by quadratic curve fitting results
Table. 2 Selected ion signals for pre-correction of peak position error
Table. 3 Condition for eliminating the invalid element signal of the signal block
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