Differences
This shows you the differences between two versions of the page.
| Both sides previous revision
Previous revision
|
Next revision
Both sides next revision
|
detectors [2018/08/30 11:13]
pereira [Cathode Readout Drift Chambers (CRDC)] |
detectors [2018/10/11 19:06]
pereira [Ionization chamber] |
| |
| ===== 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.}} |
| |
