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detectors [2018/08/30 11:13]
pereira [Cathode Readout Drift Chambers (CRDC)]
detectors [2018/10/11 19:06] (current)
pereira [Ionization chamber]
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 ===== Ionization chamber ===== ===== Ionization chamber =====
-An ionization chamber downstream of both [[Detectors#​Cathode Readout Drift Chambers (CRDC)|CRDCs]] is used to identify the Z number of the transmitted nuclei from their energy loss. The detector has an active area of approximately 30 cm x 60 cm and a depth of approximately 406 mm (16 inches). It [[Gas handling system|is filled]] with P10 gas (90% argon, 10% methane) at a typical pressure of 300 torr, although this value can be increased up to 600 torr for light nuclei. The detector consists of 16 stacked-parallel plate ion chambers with narrow anode-cathode gaps, placed along the detector’s central axis, perpendicular to the beam direction (see figure). The plates of each of these stacked chambers are constructed from 70 mg/​cm<​sup>​2</​sup>​ polypropylene with 0.15 µm of aluminum evaporated on each side. The entrance and exit windows of the chamber are made of 12 mg/​cm<​sup>​2</​sup>​ Mylar with an overlay of Kevlar filaments and epoxy.+An ionization chamber downstream of both [[Detectors#​Cathode Readout Drift Chambers (CRDC)|CRDCs]] is used to identify the Z number of the transmitted nuclei from their energy loss. The detector has an active area of approximately 30 cm x 60 cm and a depth of approximately 406 mm (16 inches). It [[Gas handling system|is filled]] with P10 gas (90% argon, 10% methane) at a typical pressure of 300 torr, although this value can be increased up to 600 torr for light nuclei. The detector consists of 16 stacked-parallel plate ion chambers with narrow anode-cathode gaps, placed along the detector’s central axis, perpendicular to the beam direction (see figure). The plates of each of these stacked chambers are constructed from 70 µg/​cm<​sup>​2</​sup>​ polypropylene with 0.15 µm of aluminum evaporated on each side. The entrance and exit windows of the chamber are made of 12 mg/​cm<​sup>​2</​sup>​ Mylar with an overlay of Kevlar filaments and epoxy.
 {{:​wiki:​ion-chamber-picture.jpg?​500 |Picture of the S800 ionization chamber with its alternating cathode and anode plates.}} {{:​wiki:​ion-chamber-picture.jpg?​500 |Picture of the S800 ionization chamber with its alternating cathode and anode plates.}}
  
detectors.1535642014.txt.gz · Last modified: 2018/08/30 11:13 by pereira