Revision as of 00:11, 18 March 2015

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%.

File:CAEN N841 Manual.pdf

NIM-ECL converter

Phillips Model 726

File:Phillip 726 Nim2ECL.pdf

TDC

Detector name convention

BLUT = Beam Left Upstream Top pmt

TDC channel Map

Detector	Angle	TDC channel	NIM-ECL channel	Patch Pannel #
BLUT	135	TDC 16	in B ch 0	223A6
BLUB	135	TDC 17	in B ch 1	223A7
BRT	270	TDC 24	in A ch 0	223A14
BRB	270	TDC 25	in A ch 1	223A15
BLDT	45	TDC 26	in A ch 2	223A16
BLDB	45	TDC 27	in A ch 3	223A17
Trig Delay		TDC 30	in A ch 6

ADC

2nCor_44

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

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