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 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.
@article{arxiv.1902.00480,
title = {Timewalk correction for the Timepix3 chip obtained with real particle data},
author = {S. Tsigaridas and M. v. Beuzekom and H. v. d. Graaf and F. Hartjes and K. Heijhoff and N. P. Hessey and P. J. de Jong and V. Prodanovic},
journal= {arXiv preprint arXiv:1902.00480},
year = {2019}
}
Comments
To be submitted in Nuclear Instruments and Methods in Physics Research Section A