Particle Counters, PDC
PDCs are a combination of Secondary Emission detectors, scintillators and Ionisation Chambers installed on a movable insert. The variable name in Lassi-spill is: GHTPDI1I (for ionization chamber), GHTPDI1P (scintillator) and GHTPDI1S (SEM detector).
Here is a list of all HEST PDCs used for transmission measurements:
GHADDI1P GHADDI1I GHADDI1S GHADDI3P GHADDI3I GHADDI3S GHHDDI1P GHHDDI2I GHHDDI2S GHTADI2P GHTADI3I GHTADI3S GHTCDI2P GHTCDI2I GHTCDI2S GHTMDI5P GHTMDI5I GHTMDIAP GHTMDIAI GHTPDI1P GHTPDI1I GHTPDI1S GHTPDI2S GTE1DI1P GTE1DI1I GTE1DI1S GTH1DI4P GTH1DI4I GTH1DI4S GTH2DI2S GTH2DIAS GTH4DI7P GTH4DI7I GTH4DI7S GTP1DI2D GTS2DI1P GTS2DI1I GTT1DI6P GTT1DI6I GTT1DI6S GTV2DI1P GTV2DI1I
The data - number of counts - are available in FESA under Acquisition:integral (type double). Acquisition:rawData_status provides information if the data is within the detector range.
On November 26th, 2018 a calibration of the HADES PDCs against scintillators was done by Plamen. The calibration factors should be applied to number of particles. Here are there results:
Detector |
Range |
IC correction |
HAD3DI |
10uA |
0.99 |
HAD3DI |
100nA |
1.01 |
HAD1DI |
10uA |
0.84 |
HAD1DI |
100nA |
0.84 |
TH1DI4I |
10uA |
1.04 |
TH1DI4I |
1uA |
1.04 |
TH1DI4I |
100nA |
1.04 |
TE1DI1I |
10uA |
1.06 |
TE1DI1I |
1uA |
1.06 |
TE1DI1I |
100nA |
1.06 |