03-27-2015

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Investigation of the nature of the secon peak in the second hit mode.

1. LED is in non-updating mode, 30 mV threshold, 40 ns pulse width:

Secon hit det1 30mV LED.png

2. LED is in updating mode (in hope to get rid of the second pulse), 30 mV threshold, 40 ns pulse width:

Second pulse is still there.

Secon hit det1 30mV LED updating.png

Another case of the second pulse appearance (same conditions):

Secon hit det1 30mV LED updating2.png


Run # (multihit data) Description
4501 Cosmic rays test, DAQ is triggered by Det #1 (bottom, multihit TDC9), HV(Det#1) was reduced to -1150 V, LED threshold on the signal coming from the top of Det#1 was set to 255 mV and fed into CAEN N93B Dual Timer. The pulse width was increased by the timer to 60 ns.
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