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Scanning performance Basetracks MIC1 (SmartTracker6)

Scanning performance Basetracks MIC1 (SmartTracker6). Dry objective. Bern. How fog can influence efficiency ? - Fog effects will be higher at large angle where the sensible volume around the track is higher infection of a good cluster: the resulting barycentre

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Scanning performance Basetracks MIC1 (SmartTracker6)

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  1. Scanning performance Basetracks MIC1 (SmartTracker6) Dry objective Bern

  2. How fog can influence efficiency ? - Fog effects will be higher at large angle where the sensible volume around the track is higher • infection of a good cluster: the resulting barycentre becomes out of association: the hits number can go down from 6 to 5 - Deformations of good clusters by a fog one can produce a deterioration of qui2 • Oppositely, on a 5 hits track, one fog cluster can, by luck, occupy the sixth rank, so the track will be accepted

  3. Base-track efficiency Fog effect

  4. Track grains/100 mm Emulsion sensitivity Long term test using PbCa (11/2004  11/2005) • Boliden Lead + Ca (NGL washed by Goslar) • CERN refreshed emulsion (FD (6.3 + 0.5)g/(10mm)3) • Spider packing • Delrin cover and side protection • 35°C in the oven (1 year) FD (6.8 + 0.5)g/(10mm)3

  5. Distortion It is simulated by random rotation (0 to max) of the microtracks ,leaving fixed the intercept with the basis; we varied max from 0 to 40 mrad Emulsion layer 1 basis

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