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arXiv · 1902.00480

Timewalk correction for the Timepix3 chip obtained with real particle data

S. Tsigaridas·M. v. Beuzekom·H. v. d. Graaf·F. Hartjes·K. Heijhoff·N. P. Hessey·P. J. de Jong·V. Prodanovic
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Abstract

In this work we have developed a prototype gaseous pixel detector by combining a micromegas grid with a Timepix3 chip for the readout. The micromegas foil supported by a matrix of pillars about 50 $\mathrm{μm}$ high was manually placed on top the chip. By placing a cathode foil above the chip an ionization detector was created with a drift gap of 13.5 mm. The Timepix3 chip, thanks to the simultaneous measurement of the time-of-arrival (ToA) and charge via time-over-threshold (ToT) allows corrections to remaining timewalk effects, improving further the position resolution along the drift direction. We present the timewalk correction for Timepix3 chip obtained with real data from a particle beam and its impact on the tracking performance. The results obtained show an significant improvement on the position resolution for single-hits and tracks along the drift direction compared to previous experiments.

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S. Tsigaridas, M. v. Beuzekom, H. v. d. Graaf, F. Hartjes, K. Heijhoff, N. P. Hessey, P. J. de Jong, V. Prodanovic. 2019-02-15. Timewalk correction for the Timepix3 chip obtained with real particle data. https://doi.org/10.1016/j.nima.2019.03.077

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