TDC Calibration

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We used:

-detector A to calibrate all the TDCs;

-LeCroy octal discriminator to produce standard negative pulses;

-passive delay line to calibrate TDCs in the region < 100 ns;

-delay amplifier TENNELEC TC215 to calibrate TDCs in the region > 250 ns;

Range of all three TDCs was set to 50nsx100.

ADC-TAC pair was chosen in such a way that we used during the experiment.

ORTEC TAC 567-02 and ADC 1D

567 02.jpg

ORTEC TAC 567-01 and ADC 1A

567 01.jpg

ORTEC TAC 566-01 and ADC 1C

566 01.jpg


Comparison of old and new calibration coefficients

Old calibration.jpg

The width of photon peak is about 10.3 ns.

New calibration.jpg

The width of photon peak is about 32.3 ns.