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detectors [2024/03/26 23:03]
swartzj [Hodoscope] |
detectors [2024/10/15 16:35] (current)
swartzj |
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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 [[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 [[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 40 torr. The detector frame has a volume of 68 cm (dispersive) x 38 cm (non-dispersive) x 10.3 cm (depth). The [[HV bias#CRDCs|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 Chambers (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 [[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 40 torr. The detector frame has a volume of 68 cm (dispersive) x 38 cm (non-dispersive) x 10.3 cm (depth). The [[HV bias#CRDCs|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 (this figure was taken from Yurkon et al., NIM A, 422, 291 (1999) and was adapted by G. W. Hitt in his PhD thesis, MSU 2009).}} | {{:wiki:crdc-drawing.jpg?600|Schematic view of the two S800 CRDCs (this figure was taken from Yurkon et al., NIM A, 422, 291 (1999) and was adapted by G. W. Hitt in his PhD thesis, MSU 2009).}} |
