Evaluation of hit point distortion due to beamstrahlung in the ILD-TPC using a new 3d code

Kanako Watanabe; Daniel Jeans; Keisuke Fujii; S. Narita; Ritsuya Hosokawa

doi:10.1140/epjp/s13360-026-07918-9

June 9, 2026The European Physical Journal PlusOpen Access

Evaluation of hit point distortion due to beamstrahlung in the ILD-TPC using a new 3d code

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Key Points

This research aims to assess charge buildup caused by beamstrahlung in the Time Projection Chamber (TPC) and its effects on electron tracking accuracy.
Utilized a new 3D code for simulations of the TPC under beamstrahlung conditions.
Estimated charge accumulation in the TPC volume at International Linear Collider (ILC) and Future Circular Collider-electron-positron (FCC-ee) environments.
Analyzed the induced distortions on drifting electrons used for tracking particle trajectories.
Identified significant charge buildup in the TPC volume due to beamstrahlung, leading to measurable distortions in track measurements.
Characterized the extent of electron drift distortion under different background conditions, impacting the precision of particle tracking.
Provided insights for improving detector design to mitigate the effects of beamstrahlung on tracking performance.

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Implication

Evaluates charge buildup and its impact on electron tracking in a Time Projection Chamber for Higgs factories, indicating significant distortion issues.

Abstract

The International Large Detector (ILD) is proposed as a detector concept for a future electron–positron Higgs factory. Its charged particle tracking system is built around a Time Projection Chamber, complemented with internal and external layers of silicon detectors. In this study, we estimate the charge which builds up in the TPC volume due to beamstrahlung backgrounds at ILC and FCC-ee, and the distortions that it induces on the drifting electrons used to measure track trajectories.

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Watanabe et al. (2026) studied this question.

synapsesocial.com/papers/6a2a50e080c8f91e7f39d36f https://doi.org/10.1140/epjp/s13360-026-07918-9

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Evaluation of hit point distortion due to beamstrahlung in the ILD-TPC using a new 3d code

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Evaluation of hit point distortion due to beamstrahlung in the ILD-TPC using a new 3d code

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