Difference between revisions of "Forward Drift Chamber Shift"
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| − | The Forward Drift Chamber (FDC) | + | The Forward Drift Chamber (FDC) system consists |
| − | of four packages, each having six chambers (cells). | + | of four identical packages, each having six chambers (cells). |
| − | + | These are planar drift chambers with both wire and cathode strips being readout, | |
| − | + | in total 12,672 channels. | |
| + | |||
| + | The chambers within a package | ||
have independent gas volumes, but are separated with a flexible mylar membrane. | have independent gas volumes, but are separated with a flexible mylar membrane. | ||
| − | Positive (up to | + | Positive (up to 2200V) and negative (up to 500V) HV is applied on the |
sense and field wires respectively with currents | sense and field wires respectively with currents | ||
| − | not exceeding | + | not exceeding 3 $\mu $A per HV channel. |
The detector (including cables) emits a total power of about 1500~Watt, | The detector (including cables) emits a total power of about 1500~Watt, | ||
of which about 900~Watt inside the magnet, | of which about 900~Watt inside the magnet, | ||
