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The BaBar light pulser system

The B<sub>A</sub>B<sub>AR </sub>experiment at the PEP-II <i>e<sup>+</sup>e<sup>-</sup></i> collider at SLAC in California started taking data in May 1999. The aim of the experiment is to study <i>CP</i> violation in the <i>B</i> meson system. A central part of the B<sub>A</sub>B<sub>AR</sub> detector is CsI(TI) electromagnetic calorimeter. To make precision measurements with a calorimeter in a high luminosity environment requires that the crystals are well calibrated and continually monitored for radiation damage. However, this should not impact the total integrated luminosity. To achieve this goal a fibre-optic light pulser system was designed. The light sources chosen were Xenon flash lamps. A novel light distribution method was developed using an array of graded index microlenses. Initial results from performance studies are presented.

Identiferoai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:643189
Date January 2000
CreatorsClark, Philip James
PublisherUniversity of Edinburgh
Source SetsEthos UK
Detected LanguageEnglish
TypeElectronic Thesis or Dissertation
Sourcehttp://hdl.handle.net/1842/13419

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