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detectors [2013/12/26 12:37] pereira [Tracking Parallel Plate Avalanche Counters (TPPAC)] |
detectors [2013/12/26 12:48] pereira [Cathode Readout Drift Chambers (CRDC)] |
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===== Cathode Readout Drift Chambers (CRDC) ===== | ===== Cathode Readout Drift Chambers (CRDC) ===== |
Two Cathode Readout Drift Chamber (CRDC) are used to measure the transversal positions and angles in the focal plane. The first detector (CRDC1) is located at the nominal optical focal plane, and it is separated 1 m from the second downstream detector (CRDC2). Each detector has an active depth of 1.5 cm, an active area of 26 cm (non-dispersive direction) x 56 cm (dispersive direction), and it is filled with a gas mixture consisting of 80% CF<sub>4</sub> and 20% C<sub>4</sub>H<sub>10</sub> at a typical pressure of 50 torr. The operating high power depends on the charge of the measured nuclei. A schematic view of a CRDC can be seen in the figure below. | Two Cathode Readout Drift Chamber (CRDC) are used to measure the transversal positions and angles in the [[Stations#Focal Plane station|focal plane]]. The first detector (CRDC1) is located at the nominal optical focal plane, and it is separated 1 m from the second downstream detector (CRDC2). Each detector has an active depth of 1.5 cm, an active area of 26 cm (non-dispersive direction) x 56 cm (dispersive direction), and [[Detector gas handling system|it is filled]] with a gas mixture consisting of 80% CF<sub>4</sub> and 20% C<sub>4</sub>H<sub>10</sub> at a typical pressure of 50 torr. The operating high power depends on the charge of the measured nuclei. A schematic view of a CRDC can be seen in the figure below. |
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{{:wiki:crdc-drawing.jpg?600|Schematic view of the two S800 CRDCs.}} | {{:wiki:crdc-drawing.jpg?600|Schematic view of the two S800 CRDCs.}} |