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GlueX Experiment Document 1317-v4

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Performance of 'first-article' scintillating fibres for the GlueX Barrel Calorimeter

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Document type:
Hall D Note
Submitted by:
Zisis Papandreou
Updated by:
Zisis Papandreou
Document Created:
06 Aug 2009, 11:10
Contents Revised:
09 Oct 2009, 18:02
Metadata Revised:
23 Mar 2010, 11:06
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The response of Kuraray SCSF-78MJ (blue-green) scintillating fibres was measured by several methods, at Regina and Jefferson Laboratory. Firstly, by employing a 373-nm UV LED to stimulate the fibres along their length and reading out the light alternatively using a spectrophotometer and a photodiode. These yielded, respectively, the spectral response and the effective attenuation length from the photodiode's current readout. Secondly, by exciting the fibres using a 90Sr radioactive source located at different measuring stations that allowed the extraction of the number of photoelectrons using vacuum photomultipliers as the photo sensors. Thirdly, diameter uniformity measurements were carried out. The results of all tests confirm that the fibres meet the GlueX specifications as contracted to Kuraray and, therefore, signal the start of production of fibres towards the construction of the GlueX Barrel Calorimeter. Finally, the Regina results set the reference standard towards fibre quality assurance during the production phase.
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Referenced by:
  • GlueX-doc-1319: First Article Fibers: Re-Analysis of JLab Data in Regina
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