“…Figure 11.12 is a schematic cross section of one of the first large arrays of straw drift chambers for the MARK II detector, including 552 single-wire tubes; made with thin polymer cathodes, metal-coated on the inner side, the straws typically have a thickness of 50 to 100 µm, corresponding to a few tens of a per cent of radiation length (Ford et al, 1987). Planar assemblies of straw arrays, usually glued together in modules to improve mechanical stability, have been used in many experiments (Arai et al, 1996;Armstrong et al, 1999;Ogren, 1995;Fourletov, 2004;Bychkov et al, 2006;Bachmann et al, 2004).…”