2nCor Equipment
Detectors
PMTs
http://www.hamamatsu.com/resources/pdf/etd/R580_TPMH1100E.pdf
Scintillators
e+e- spectrometer
DAQ electronics
Signal Processing
Discriminator
CAEN N841
The pulse forming stage of the discriminator produces an output pulse whose width is adjustable in a range from 5 ns to 40 ns. Each channel can work both in Updating and Non-Updating mode according to on-board jumpers position. The discriminator thresholds are individually settable in a range from -1 mV to -255 mV (1 mV step), via an 8-bit DAC. The minimum detectable signal is -5 mV. The back panel houses VETO and TEST inputs, the OR output and the Current Sum output, which generates a current proportional to the input multiplicity, i. e. to the number of channels over threshold, at a rate of -1.0 mA per hit (-50 mV per hit into a 50 Ohm load) ±20%.
NIM-ECL converter
Phillips Model 726
TDC
Detector name convention
- BLUT = Beam Left Upstream Top pmt
- TDC channel Map
| Detector | Angle | TDC channel | NIM-ECL channel | Patch Pannel # | ROOT vaiable |
| BLUT | 135 | TDC 16 | in B ch 0 | 223A6 | evt.TDC[16] |
| BLUB | 135 | TDC 17 | in B ch 1 | 223A7 | evt.TDC[17] |
| BRT | 270 | TDC 24 | in A ch 0 | 223A14 | evt.TDC[24] |
| BRB | 270 | TDC 25 | in A ch 1 | 223A15 | evt.TDC[25] |
| BLDT | 45 | TDC 26 | in A ch 2 | 223A16 | evt.TDC[26] |
| BLDB | 45 | TDC 27 | in A ch 3 | 223A17 | evt.TDC[27] |
| Trig Delay | TDC 30 | in A ch 6 | evt.TDC[30] | ||
| Photon flux monitor | 90 | TDC 29 | in A ch 5 | 223A10 | evt.TDC[29] |
ADC
Software
Ntuple maker
To make the Tree containing the TDC, QDC, and PDC data run the following command
source ~/CODA/setup
/home/daq/CODA/CODAreader/ROOT_V5.30/v775v792v785/evio2nt -fr8735.dat >/dev/null
rename the output file to a root file
mv r8735 r8735.root
root -l r8735.root
to draw a histogram for TDC channel 16
DAQ->Draw("evt.TDC[17]>>(4096,0,4096)");