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MPPC readout electoronics M.Taguchi(kyoto). MPPC readout with DAQ board DAQ board OUT_P OUT_N - + OPAMP Trip-t +5V -5V 4m flat cable Labview control signal.

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Presentation on theme: "MPPC readout electoronics M.Taguchi(kyoto). MPPC readout with DAQ board DAQ board OUT_P OUT_N - + OPAMP Trip-t +5V -5V 4m flat cable Labview control signal."— Presentation transcript:

1 MPPC readout electoronics M.Taguchi(kyoto)

2 MPPC readout with DAQ board DAQ board OUT_P OUT_N - + OPAMP Trip-t +5V -5V 4m flat cable Labview control signal trig gain=1 MPPC LED

3 Labview DAQ board trig Trip-t MUX_CLK timing を合わせ る

4 MUX_CLK from DAQ board MUX_CLK from Labview A_OUT from Trip-t (test charge)

5 Trip-t OPAMP DAQ cable

6 ADC distribution(test charge) ADC count

7 Trip-t A_OUT gain pipeline 1pF 3pF preamp gain x1 or x4 pipeline gain x2,x4,x8… preamp charge

8 A_OUT of MPPC preamp gain=x4 pipeline gain=x1

9 ADC distribution preamp gain=x4 pipeline gain=x1 not same 400pixel V=70.0V

10 A_OUT Linearity preamp gain=x4, pipeline gain=x1 preamp gain=x4, pipeline gain=x2 low signal linearity problem associates with this version of chip preamp gain=x1, pipeline gain=x4 MPPC 10p.e. (G=7.5x10 5 )

11 A_OUT of MPPC preamp gain=x1, pipeline gain=x4

12 ADC distribution(2) preamp gain=x1 pipeline gain=x4 same 400pixel V=70.0V

13 MPPC gain measured by Trip-t and CAMAC by CAMAC by Trip-t 400pixel 100pixel 1x10 6 3x10 6 4x10 5 1x10 6

14 crosstalk of A_OUT 0.4% 1.4pC to ch15 (Dynamic range of Trip-t with this gain setting) crosstalk~0.4% ch preamp gain=x1, pipeline gain=x4

15 70.0V readout 4MPPCs simultaneously 100pix400pix

16 Problem? LED trig PRE_RST MPPC signal after preamp LED trig V=69.8V V=71.4V Strange pedestal structure due to charge up on coupling capacitor when bias V up Problem? V=71.4V Trip-t signal charge on capacitor

17 V=69.8V Problem? V=71.4V at the bias V we see strange pedestal, raw signal is also strange no problem

18 backup

19 There is no special change if we change the values of registers - preamp feedback control - preamp drive current - etc… now design the board of 32ch MPPC inputs

20 A_OUT gain preamp gain = x1 pipeline gain= x4 variation ~4% chGain (ADC count/pC) 15730 16710 31735 32732

21 T_OUT charge Disc_OUT PIPE_CLK time difference voltage

22 T_OUT linearity time(ns) input charge=0.65pC

23 T_OUT gain variation~25% chGain (count/ns) 158.52 168.60 318.00 329.97

24 Disc. threshold curve propability of discri firing 5Vth unit = 2.5fC ~ 0.02p.e.  threshold uncertainty input charge =0.13pC

25 Time walk T_OUT ADC count vs injected charge time walk

26 position dependence of PIPE_CLK preamp out PIPE_CLK time(ns)


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