Difference between revisions of "Forward Drift Chamber Shift"

@@ Line 2: / Line 2: @@
 <!--
+The Forward Drift Chamber (FDC) is a 12,672 channel system consisting
-The barrel calorimeter (BCAL) is a lead-scintillating fiber matrix readout with 3840 S12045 Hamamatsu multi-pixel photon counters (MPPCs).
+of four packages, each having six chambers (cells).
-The MPPC light sensors operate a bias voltage less than 76 V. Liquid coolant is circulated through the readout assemblies to set and
+Each chamber has a wire plane sandwiched between two
-maintain the temperature of the sensors at their operating temperature between 5 and 25 degrees C.
+cathodes consisting of readout strips. The chambers within a package
+have independent gas volumes, but are separated with a flexible mylar membrane.
+Positive (up to 2300V) and negative (up to 500V) HV is applied on the
+sense and field wires respectively with currents
+not exceeding 10 $\mu $A per HV channel.
+The detector (including cables) emits a total power of about 1500~Watt,
+of which about 900~Watt inside the magnet,
+due to the LV applied on the detector pre-amplifieres;
+a cooling system using Fluorinert is used to keep the temperature on the
+pre-amplifiers below ~50$^0$~C.
 == Routine operation==

Revision as of 12:02, 2 June 2014