Detectors for
performance tests
Several detectors have been built for checking
the performance and optimizing the best operating conditions.
(
1 ) FDC2P (FDC2 Prototype)
FDC2 is too big to change operating
conditions in for finding the best
conditions. Hexagonal drift chamber has
been build having the same cell & layer structure.
Status:
Tested using cosmic rays in 2010.
Tested using ~250 MeV/A secondary beams
at HIMAC
(
2 ) PDCP (PDC Prototype)
Drift chamber with cathode readout has been
built for testing the cathode readout scheme & position resolution. Starting from the existing MWPC with cathode
readout, anode structure was modified into the Walenta-type drift chamber.
|
configuration |
cathode(X)-Anode(Y)-cathode(U)-anode(X)-cathode(Y) |
|
wire
angle |
X(0°), Y(90°), U(45°) |
|
Effective
area |
600mm
x 460mm |
|
Anode & potential wires |
20μmφ Au-W/Re, 80μmφ Au-Al, drift
distance=7.5mm |
|
Half
gap (anode-cathode) |
8
mm |
|
cathode
wire |
wire
pitch= 2.5mm, strip pitch= 12.5 mm |
|
HV |
Anode(+),
potential(-) |
|
Operating
gas |
He+60%CH4 |
Status:
Being tested with 2
reference cathode chambers using cosmic rays
kobayash
@lambda.phys.tohoku.ac.jp
Updated
3-Sep-2011