TPC material description in MC • Data – MC comparison by Ana Marin • Material and geometry check and updates • New results 2010-03-16 Marek Kowalski, Offline week, 1 March 2010
Number of gamma conversions vs. radius ICV IFC TPC 2010-03-16 Marek Kowalski, Offline week, 2 March 2010
Measures taken to match the data (1) • Updated material of the central drum (ICV) � added 2 x 0.1 mm of epoxy film, missing on my drawings 0.47% of X 0 → 0.54% of X 0 • Updated material of the inner field cage (IFC) � „Czech error” corrected (swapped digits) � instead of 3 x 0.1 mm of prepreg which is on my and Danilo’s drawings, in reality we have 2 x 0.25 mm, according to Wolfgang Klempt 0.4% of X 0 → 0.73 % of X 0 2010-03-16 Marek Kowalski, Offline week, 3 March 2010
ICV after the firts round of corrections 2010-03-16 Marek Kowalski, Offline week, 4 March 2010
IFC after the firts round of corrections Data Bulk of material described correctly, but… 2010-03-16 Marek Kowalski, Offline week, 5 March 2010
Measures taken to match the data (2) • Updated material of the resistor rod (Cu plates, resistors) • Updated material of makrolon rods (Al rings at joints) • Updated azimuthal position of the resistor rod 2010-03-16 Marek Kowalski, Offline week, 6 March 2010
2010-03-16 Marek Kowalski, Offline week, 7 March 2010
resistor chain for guard rings Agreement within 5% IFC joints 2010-03-16 Marek Kowalski, Offline week, 8 March 2010
Measures taken to match the data (3) • Added construction joints for the IFC (epoxy glue) • Added resistor chains for guard rings (ceramics) 2010-03-16 Marek Kowalski, Offline week, 9 March 2010
2010-03-16 Marek Kowalski, Offline week, 10 March 2010
Material distribution in MC resistor chain resistor rod 2010-03-16 Marek Kowalski, Offline week, 11 March 2010
Data/MC comparison resistor rod resistor chain joints resistor chain+joint 2010-03-16 Marek Kowalski, Offline week, 12 March 2010
More updates • OFC material properties (the same Czech error as in the IFC) 0.4% of X 0 → 0.51% of X 0 • Segmentation of the OCV and OFC (6 segments) • Central membrane � Geometry of the membrane holidng ring � Clamps for the membrane fixation R<85 cm The TPC now is 3.89% of X 0 thick, as compared to 3.5% of X 0 previously 2010-03-16 Marek Kowalski, Offline week, 13 March 2010
The material distribution of the central electrode is being tested (Ana). For the OFC one has to wait for the data from the TRD Coding of all these details would be a nightmare without the Geometrical Modeler by Andrei Gheata 2010-03-16 Marek Kowalski, Offline week, 14 March 2010
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