Charged particle tracking with the Timepix ASIC

Kazuyoshi Akiba, Marina Artuso, Ryan Badman, Alessandra Borgia, Richard Bates, Florian Bayer, Martin Van Beuzekom, Jan Buytaert, Enric Cabruja, Michael Campbell, Paula Collins, Michael Crossley, Raphael Dumps, Lars Eklund, Daniel Esperante, Celeste Fleta, Abraham Gallas, Miriam Gandelman, Justin Garofoli, Marco GersabeckVladimir V. Gligorov, Hamish Gordon, Erik H.M. Heijne, Veerle Heijne, Daniel Hynds, Malcolm John, Alexander Leflat, Lourdes Ferre Llin, Xavi Llopart, Manuel Lozano, Dzmitry Maneuski, Thilo Michel, Michelle Nicol, Matt Needham, Chris Parkes, Giulio Pellegrini, Richard Plackett, Tuomas Poikela, Eduardo Rodrigues, Graeme Stewart, Jianchun Wang, Zhou Xing

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


A prototype particle tracking telescope was constructed using Timepix and Medipix ASIC hybrid pixel assemblies as the six sensing planes. Each telescope plane consisted of one 1.4 cm2 assembly, providing a 256 ×256 array of 55μm square pixels. The telescope achieved a pointing resolution of 2.4μm at the position of the device under test. During a beam test in 2009 the telescope was used to evaluate in detail the performance of two Timepix hybrid pixel assemblies; a standard planar 300μm thick sensor, and 285μm thick double sided 3D sensor. This paper describes a charge calibration study of the pixel devices, which allows the true charge to be extracted, and reports on measurements of the charge collection characteristics and Landau distributions. The planar sensor achieved a best resolution of 4.0±0.1μm for angled tracks, and resolutions of between 4.4 and 11μm for perpendicular tracks, depending on the applied bias voltage. The double sided 3D sensor, which has significantly less charge sharing, was found to have an optimal resolution of 9.0±0.1μm for angled tracks, and a resolution of 16.0±0.2μm for perpendicular tracks. Based on these studies it is concluded that the Timepix ASIC shows an excellent performance when used as a device for charged particle tracking.

Original languageEnglish (US)
Pages (from-to)31-49
Number of pages19
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1
StatePublished - Jan 1 2012


  • 3D sensor
  • Charge calibration
  • Digitization
  • Efficiency
  • Landau
  • Particle tracking telescope
  • Pixel
  • Planar sensor
  • Resolution
  • Silicon
  • Testpulse
  • Timewalk

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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