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detectors [2018/08/30 11:12]
pereira [Cathode Readout Drift Chambers (CRDC)]
detectors [2018/08/30 11:13] (current)
pereira [Cathode Readout Drift Chambers (CRDC)]
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-Each detector consists of two 12-µm PPTA windows mounted on frames, two printed circuit boards (PCB) and an anode frame. Each PCB is made of un-masked G-10, and includes a field shaping foil (70 µg/cm^2 polypropylene with 0.1 µm of evaporated gold) to ensure a uniform field in the active region of the detector. Two G-10 spacers are laminated to the board on each side. The shaping foils are made of 1.9-mm pitch evaporated aluminum strips perpendicularly oriented to the electric field. The anode frame includes a glued cathode grounding plane, an anode wire running across the field, and a Frisch grid. Cathode pads are located in front of and behind the anode wire. The pads have a pitch of 2.54 mm. The anode frame is sandwiched between the two printed circuit boards with two spacers in between, as shown in the figure below.+Each detector consists of two 12-µm PPTA windows mounted on frames, two printed circuit boards (PCB) and an anode frame. Each PCB is made of un-masked G-10, and includes a field shaping foil (70 µg/cm<sup>2</​sup> ​polypropylene with 0.1 µm of evaporated gold) to ensure a uniform field in the active region of the detector. Two G-10 spacers are laminated to the board on each side. The shaping foils are made of 1.9-mm pitch evaporated aluminum strips perpendicularly oriented to the electric field. The anode frame includes a glued cathode grounding plane, an anode wire running across the field, and a Frisch grid. Cathode pads are located in front of and behind the anode wire. The pads have a pitch of 2.54 mm. The anode frame is sandwiched between the two printed circuit boards with two spacers in between, as shown in the figure below.
  
 {{:​wiki:​crdc-section.jpg?​600|Cross section of a CRDCs.}} {{:​wiki:​crdc-section.jpg?​600|Cross section of a CRDCs.}}
detectors.txt · Last modified: 2018/08/30 11:13 by pereira