High Power Laser and Particle Beams, Volume. 36, Issue 10, 104001(2024)
Segment-smoothed Bayesian iterative method to reconstruct pulsed X-ray spectrum
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Fig. 2. Energy deposition of different energy photons on the detector
Fig. 3. X-ray spectra unfolded from three initial spectra by the Bayesian iterative method
Fig. 4. 100 reconstructed spectra unfolded with the Bayesian iterative method under three noise levels
Fig. 5. Average error of the spectrum reconstructed using smoothed and unsmoothed Bayesian iterative methods
Fig. 6. 100 reconstructed spectra unfolded with the segmented smoothing Bayesian iterative method under three noise levels
Fig. 8. Pulsed X-ray spectra reconstructed based on experimental waveforms
Table 1. Average error of the spectrum reconstructed using the Bayesian iterative method, disturbed by four types of noise
View tableView in ArticleTable 1. Average error of the spectrum reconstructed using the Bayesian iterative method, disturbed by four types of noise
noise type average error of the reconstructed spectrum $ \overline{ \left\| \Delta\mathit{\boldsymbol{\Phi\boldsymbol{ }}} \right\| _2} $ 1% noise level 5% noise level 10% noise level measurement system noise 0.68 1.10 1.53 photon scattering noise 0.68 1.02 1.42 environmental noise 0.65 0.81 1.01 absorption foil thickness error 0.66 0.87 1.31
Table 2. Average error of the spectrum reconstructed with different smoothing coefficients, disturbed by measurement system noise
View tableView in ArticleTable 2. Average error of the spectrum reconstructed with different smoothing coefficients, disturbed by measurement system noise
reconstructed method average error of the reconstructed spectrum $ \overline{ \left\| \Delta\mathit{\boldsymbol{\Phi}} \right\| _2} $ 1% noise level 5% noise level 10% noise level segment smooth 0.748 0.752 0.763 smoothing coefficient s2=0.05 0.777 0.781 0.825 smoothing coefficient s2=0.2 0.740 0.754 0.812
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Zeqi Lü, Yanzhao Xie, Yi Zhou. Segment-smoothed Bayesian iterative method to reconstruct pulsed X-ray spectrum[J]. High Power Laser and Particle Beams, 2024, 36(10): 104001
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Received: Jun. 13, 2024
Accepted: Sep. 3, 2024
Published Online: Nov. 13, 2024
The Author Email: Xie Yanzhao (yzxie@xjtu.edu.cn)
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