Analysis and Mitigation of Pulse-Pile-Up Artifacts in Plasma Pulse-Height X-ray Spectra

Ahsan, Taosif; Swanson, Charles S.; Galea, Chris; Vinoth, Sangeeta P.; Qian, Tony; Rubin, Tal; Cohen, Samuel A.

doi:10.3390/plasma6010006

Analysis and Mitigation of Pulse-Pile-Up Artifacts in Plasma Pulse-Height X-ray Spectra

Journal Article · Thu Feb 02 00:00:00 EST 2023 · Plasma

DOI:https://doi.org/10.3390/plasma6010006· OSTI ID:1957520

Ahsan, Taosif ^[1]; ^[2]; ^[3]; ^[2]; Qian, Tony ^[4]; ^[4]; ^[4]

Princeton Univ., NJ (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Fusion Systems, Plainsboro, NJ (United States)
Princeton Fusion Systems, Plainsboro, NJ (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Pulse pile-up in pulse-height energy analyzers increases when the incident rate of pulses increases relative to the inverse of the dead time per pulse of the detection system. Changes in the observed energy distributions with incident rate and detector-electronics-formed pulse shape then occur. Here, we focus on weak high energy tails in X-ray spectra, important for measurements on partially ionized, warm (50–500 eV average electron energy), pure hydrogen plasma. A first-principles two-photon pulse-pile-up model is derived specific to trapezoidal-shaped pulses; quantitative agreement is found between the measurements and the model’s predictions. The model is then used to diagnose pulse-pile-up tail artifacts and mitigate them in relatively low count-rate spectra.

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC02-09CH11466; AR0001099

OSTI ID:: 1957520

Journal Information:: Plasma, Journal Name: Plasma Journal Issue: 1 Vol. 6; ISSN 2571-6182

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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References (11)

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