The Opera Concept
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reject (short) t decays in metal plates
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thin lead plates :
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two emulsion sheets (ES) for tracking, light
spacer
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each ES :
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50 mm emulsion layers on both sides of 100 (200)
mm plastic base
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2 high quality
track segments in space (mm
granularity)
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decay topology (kink angle) detection in space
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use decays in Pb for checks and specific studies