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Development of Si-TPC Endplates for Advanced Detector Systems

This document outlines the initial prototype designs for the Si-TPC (Single-chip test detector) endplates, focusing on a field cage measuring 6 cm x 2 cm x 2 cm and integrating fine gas tubes with USB readout for effective testing in DESY's test beam. Upcoming developments include X-ray polarimetry at the Soleil synchrotron and advancements with the Medipix 2-MXR chip. The plans encompass collaborative efforts for gas-tightness, module variability, and best practices while keeping an eye on future improvements and resource assessments through dedicated meetings.

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Development of Si-TPC Endplates for Advanced Detector Systems

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  1. Large Prototype Endplate(s) P. Colas, Endplates

  2. Si-TPC Single-chip test detector • First step, not to flush 100 liters: 6 cm x 2cm x 2cm field cage • fine gas tubes, USB readout • To be tested in DESY test beam • possibly X-ray polarimetry in the Soleil synchrotron • In June : first prototype with Medipix 2 –MXR chip • In September real TPC with TimePix? P. Colas, Endplates

  3. LP endplate (s) Initial plans • Initial plans differ a lot (Saclay T2K: 2 large modules, 12 bolts / Cornell: 26 small modules, 80 bolts • But will converge fast, somewhere between these extremes Saclay T2K Cornell P. Colas, Endplates

  4. LP endplate (s) General principles(for discussion) • General idea: several modules (more than 2) • Gas-tightness. From the back of each module: minimize dead areas • Potential continuity • Modules can be different, some can be dummy • Cannot mix GEM and Micromegas on the same endplate (different running conditions, very different potentials and thickness) • However keep as similar as possible • Keep space for pixels P. Colas, Endplates

  5. Convergence Si chip readout P. Colas, Endplates

  6. Japanese contribution to the LP • They got >1 postdoc during 5 years + 50-100 k$/year • Can contribute by industry building endplates/pad boards. • Propose Endplate design meeting in Paris in September. • To clearly define goals of LP • To clearly define boundary conditions (field cage and electronic interfaces) • To agree on basic principles • To assess resources P. Colas, Endplates

  7. LEGS TPC (Brookhaven) : anode pads and ASIC plane P. Colas, Endplates Bo Yu, TPC application meeting, Berkeley, April 2006

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