What will Sensor::GetSignal() give if multiple wires have same label

Garfield++
1

Hi, I was trying to use AvalancheMC to simulate signal on a sense wire, I set up 9 cells with 9 sense wires, and add them to Sensor with the same label “sense”.

Sensor::Addwire(some properties, "sense")
Sensor:Addwire(some properties, "field")
Sensor::AddReadout("sense")
Sensor::AddElectrode("sense")

When I tried to get signal after simulation I got no signal. I wonder which wire’s signal I will get if I use

ViewSignal::PlotSignal("sense",1)

And then I changed label to only use center sense wire like

Sensor::Addwire(some properties, "center_sense")
Sensor::Addwire(some properties, "sense")
Sensor:Addwire(some properties, "field")
Sensor::AddReadout("center_sense")
Sensor::AddElectrode("center_sense")

but I still got no signal. Where I did wrong?

2

If you use the same label for multiple wires you will get the sum of the signals on these wires.

Can you provide more information (minimal working example)?

3

xt_simulation.zip (37.5 KB)
Here you go, I didn’t convolute signal but maybe it doesn’t matter…

4

I just noticed I set the time window quite narrow, so I tried to widen it to 1000 ns but still got no signal.

5

Just another thing I forgot to mention…
when simulating avalanche the output keep giving like

AvalancheMC::DriftLine: (-0.000965, -0.000795, -0.749725) is not in a valid drift region.

of generated electrons, and seems that these avalanched electrons are inside anode wire, which I don’t understand.

6

Thanks for the additional information and thanks also for sending your code but I was hoping for a minimal example, not your full program/framework “as is” (which makes it much harder for me to debug). I can still try to take a look but I’m not sure when I’ll have the time to do that…

7

Sorry for this! I just noticed I somehow miss the wire ID so I actually didn’t set the wire to Sensor::AddReadout().
Such a dumb mistake, thank you anyway!

8

No worries. Great that you managed to fix the issue!

9

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