Test beam results of a proton irradiated Czochralski silicon strip detector

P. Luukka, T. Lampén, L. A. Wendland, S. Czellar, E. Hæggström, J. Härkönen, V. Karimäki, I. Kassamakov, T. Mäenpää, J. Tuominiemi, E. Tuovinen

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Abstract

We report on test beam results obtained with a 32.5 cm2 microstrip detector processed on an n-type 380 μm thick magnetic Czochralski (MCZ) grown silicon substrate with 1200 Ωcm effective resistivity. The full depletion voltage of the as-processed detector was 420 V with a leakage current of 2 μA. The AC coupled detector had 1024 p+ strips, 10 μm by width and 6.154 cm by length with a pitch of 50 μm. The detector was irradiated with 10 MeV protons to 1.6×1014 1 MeV neutron equivalent fluence and annealed for 345 days at room temperature. The post-irradiation full depletion voltage of the detector was 225 V. The leakage current at the full depletion measured at -10 °C was 261 μA. The beam tests were carried out at the CERN H2 area using a Silicon Beam Telescope, which consists of pairs of horizontal and vertical position sensitive silicon detectors. This telescope determines the tracks of incoming particles and hence provides a reference measurement for the detector characterization. In the beam test an average signal to noise ratio of 3 with a spatial resolution of 20 μm and a particle detection efficiency of 36% were measured. These results show that the MCZ device detected particles, which encourages further investigations of MCZ silicon as a detector material. The poor performance of the MCZ detector may be explained by the problems observed in the reference telescope.

Original languageEnglish
Pages (from-to)72-77
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume568
Issue number1
DOIs
Publication statusPublished - Nov 30 2006

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Keywords

  • Material engineering
  • Radiation hardness
  • Si particle detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Luukka, P., Lampén, T., Wendland, L. A., Czellar, S., Hæggström, E., Härkönen, J., Karimäki, V., Kassamakov, I., Mäenpää, T., Tuominiemi, J., & Tuovinen, E. (2006). Test beam results of a proton irradiated Czochralski silicon strip detector. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 568(1), 72-77. https://doi.org/10.1016/j.nima.2006.05.204