Biennial Report 2005-2007 - Saha Institute of Nuclear Physics

88 Biennial Report 2005-07•4800 anode wires (20 µm) were soldered with precise tension of 65 gms.•There were 120 precision joints of the frame-parts (on a Master Tooling Plate)•Total of 640 edges of cathode PCBs were cut with a precision of ∼20 µm.•Total of 180 precision joints (performed under CCD camera) were done to assemble 20 segmentedcathode planes.•20 cathode sandwiches (inner radius 23 cm and outer radius 115cm) were assembled with a surfaceplanarity of around 50 µm.20 micron gold-plated tungsten wires soldered on Anode PCB with epoxy supportThese chambers were air-transported to CERN in October, 2006 after a detailed planning onpackaging of these delicate wire chambers which has 120 cm long 20 micron thick wires. All thechambers reached CERN without any broken wire.Md Danish Azmi†, Suvendu Nath Bose, Sukalyan Chattopadhyay, Dipankar Das, Indranil Das,Pradip Datta†, AK Dutt-Mazumder, Md Irfan, Shampa Jana, Iftikar Ahmed Khan†, Sanjoy Pal,Lipy Paul, Pradip Roy, Tinku SinhaHEP