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Performance of the EUDET-type beam telescopes | | H. Jansen
; S. Spannagel
; A. Bulgheroni
; G. Claus
; E. Corrin
; D. G. Cussans
; J. Dreyling-Eschweiler
; D. Eckstein
; T. Eichhorn
; M. Goffe
; I. M. Gregor
; D. Haas
; C. Muhl
; H. Perrey
; R. Peschke
; P. Roloff
; I. Rubinskiy
; M. Winter
; | | Date: |
31 Mar 2016 | | Abstract: | Test beam measurements at the test beam facilities of DESY have been
conducted to characterise the performance of the EUDET-type beam telescopes
originally developed within the EUDET project. The beam telescopes are equipped
with six sensor planes using MIMOSA26 monolithic active pixel devices. A
programmable Trigger Logic Unit provides trigger logic and time stamp
information on particle passage. Both data acquisition framework and offline
reconstruction software packages are available. User devices are easily
integrable into the data acquisition framework via predefined interfaces.
The biased residual distribution is studied as a function of the beam energy,
plane spacing and sensor threshold. Its width at the two centre pixel planes
using all six planes for tracking in a 6 GeV electron/positron-beam is measured
to be $(2.88,pm,0.08),upmumeter$. Iterative track fits using the
formalism of General Broken Lines are performed to estimate the intrinsic
resolution of the individual pixel planes. The mean intrinsic resolution over
the six sensors used is found to be $(3.24,pm,0.09),upmumeter$. With a 6
GeV electron/positron beam, the track resolution halfway between the two inner
pixel planes using an equidistant plane spacing of 20 mm is estimated to
$(1.78,pm,0.03),upmumeter$ assuming the measured intrinsic resolution.
Towards lower beam energies the track resolution deteriorates due to increasing
multiple scattering. Threshold studies show an optimal working point of the
MIMOSA26 sensors at a sensor threshold of between five and six times their RMS
noise. Measurements at different plane spacings are used to calibrate the
amount of multiple scattering in the material traversed and allow for
corrections to the predicted angular scattering for electron beams. | | Source: | arXiv, 1603.9669 | | Services: | Forum | Review | PDF | Favorites | |
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