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detectors [2013/12/13 18:56]
pereira [Ionization Chamber] |
detectors [2013/12/13 18:57]
pereira [Cathode Readout Drift Chambers (CRDC)] |
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| {{:wiki:crdc-section-drift.jpg?600|Principle of operation of a CRDC.}} | {{:wiki:crdc-section-drift.jpg?500|Principle of operation of a CRDC.}} |
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| 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 volume of __xxx cm x xxx cm x xxx cm__ and 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 picture below). The plates are constructed from 70 mg/cm<sup>2</sup> polypropylene with 0.05 µm of aluminum evaporated on each side. The entrance and exit windows of the chamber are made of 14 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 volume of __xxx cm x xxx cm x xxx cm__ and 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 picture below). The plates are constructed from 70 mg/cm<sup>2</sup> polypropylene with 0.05 µm of aluminum evaporated on each side. The entrance and exit windows of the chamber are made of 14 mg/cm<sup>2</sup> Mylar with an overlay of Kevlar filaments and epoxy. |
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| {{:wiki:ion-chamber-picture.jpg|Picture of the S800 ionization chamber with its alternating cathode and anode plates.}} | {{:wiki:ion-chamber-picture.jpg?550|Picture of the S800 ionization chamber with its alternating cathode and anode plates.}} |
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| {{:wiki:ion-chamber-drawing.jpg|Schematic representation of the principle of operation of the ionization chamber.}} | {{:wiki:ion-chamber-drawing.jpg?550|Schematic representation of the principle of operation of the ionization chamber.}} |
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