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Energy loss and online directional track visualization of fast electrons with the pixel detector Timepix
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SYSNO ASEP 0424873 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Energy loss and online directional track visualization of fast electrons with the pixel detector Timepix Author(s) Granja, C. (CZ)
Krist, Pavel (UJF-V) RID, ORCID, SAI
Chvátil, David (UJF-V) RID, SAI, ORCID
Šolc, J. (CZ)
Pospíšil, S. (CZ)
Jakubek, J. (CZ)
Opalka, L. (CZ)Number of authors 7 Source Title Radiation Measurements. - : Elsevier - ISSN 1350-4487
Roč. 59, DEC (2013), s. 245-261Number of pages 17 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords interaction of radiation with matter ; dE/dx detectors ; particle tracking detectors ; hybrid pixel detectors ; active nuclear emulsion ; energy loss Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders Institutional support UJF-V - RVO:61389005 UT WOS 000329421700039 EID SCOPUS 84889095051 DOI 10.1016/j.radmeas.2013.07.006 Annotation The spectral-, position- and tracking-response of Timepix to energetic electrons has been tested and characterized with well-defined low-intensity parallel beams of monoenergetic electrons in the 7 -21 MeV range. The per-pixel energy sensitivity of Timepix serves as a position-sensitive dE/dx detector to determine the energy loss over along the particle track. The sampling path pitch can be set to 55 mu m (pixel-size) and arbitrary values between 300 mu m (sensor thickness) and nearly 2 mm. Timepix can register and visualize not only the position and trajectories but also the direction of trajectories and the rate of directional scattering of single fast electrons across the semiconductor sensor. The technique serves to measure the spatial distribution of a parallel beam, the beam size spread, transversal beam flux homogeneity and lateral straggling at the pixel-size scale. The mean scattering path along the beam axis and the mean path for lateral beam straggling in silicon can be determined. Measured energy loss distributions were compared with model and previous data as well as with dedicated Monte Carlo MCNPX simulations performed for this work. Tracking distributions were also simulated. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2014
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