May E906 Work and Status TDC readout – One full TDC board, 4 ECL cables/modules KTEV UCLA LV PS – Thanks Dave N.! – +/- 5V, 18A each – Spade /10-12AWG.

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Presentation transcript:

May E906 Work and Status TDC readout – One full TDC board, 4 ECL cables/modules KTEV UCLA LV PS – Thanks Dave N.! – +/- 5V, 18A each – Spade /10-12AWG from ACE HV: +2000~2200 V Last plane (H): bottom modules 5,6,7,8 – 4 ECL cables/one TDC card TDC with global pulser – cosmic trigger from ST4-Hodoscopes, 2H+1V – HV off TDC with cosmic trigger – Global pulser ON – HV on

May 15, 2011

Cosmic trigger

First full TDC readout with ST4- hodoscope cosmic trigger One TDC card (new one, w/ 2nS step) – 4x16 channels (4 cables) Global external pulser delay = 2 uS – External pulser connected to modul 8 Read out up to 8 samples per channel – 2nS step, 0xee1 = 3809 x 2nS = uS Cable-1 (mod 8; 1(top)-9(bottom)) – Some hits, but none close to “8uS” Cable-2(mod 7) – Most hits close to “8uS” Cable-3(mod 6) – No hits, bad FEM? Broken pulser input? Cable-4(mod 5) – Every channel has hit, and close to “8 uS”

State of the art DAQ and Control

Trigger and readout setup Cosmic trig. Delayed pulser data Com. stop 010 uS ΔT ~ 2uS Some after pulses (noise) TDCs (<=8 samples) TDC 8 uS! 8 uS start stop

Cosmic signal and trigger/com. stop

Cable-4 (mod. 5) TDC from external pulser (cosmic trigger), HV=off 8 uS! Noisy channel!

Second readout test Global pulser Delay 5uS Some DAQ problems – DAQ auto self rebooting … Pulser causing the problem? Some grounding issues? DAQ runs fine without pulser Data volume too large? Further test needed

Cosmic data! Com. Stop delayed 5 uS HV=2200 V Black: all samples Blue: the first sample only 5.0 uS

Module 4: TDCs (16 chan.)

Trigger, data, Com-Stop a lucky shot!

The challenge: what are they?!

Gifts from God

LV cables

Gas lines

LV and HV racks

To do list LV – Replace the cooling fans – location – LV cables from PS to chambers HV – How many channels do we need? 4? (2 modules) 4x9=36? (18 modules) – Location – Cables from PS to chambers Signal – Rack location – Cables 4x9 = 36 Calibration pulser driver – NIM able to drive all 9 modules per plane, -1V, XX mA? – Gate generator : voltage sagging ~ [-0.5, -0.8] Gas panels (4)

Trigger