How to get information about the arbitrary position of an electron in the track of a drifting avalanche process

Garfield++
1

Hello!
I know get the information the end point of the electron like
aval.GetElectronEndpoint(j, xe1, ye1, ze1, te1, e1, xe2, ye2, ze2, te2, e2, status);
But I want to get information like x, y , z , energy, t about the arbitrary position of an electron in the track of a drifting avalanche process. Does Garfield++ allow us to do this?
Thanks for your help!

2

Hi,
yes, you can use call-back functions (“user handles”) for this purpose. As an illustration
In this example such a function is to plot the z-coordinates of all excitations in the avalanche.
Currently, there are hooks available for calling a function at every step, at every collision, and for specific types of collisions.

3

Hi,
Thank you for your reply.
I have found a function ( AvalancheMicroscopic::GetElectronDriftLinePoint) . In this function I can get the coordinates include x y, z , t in the avalanche .Does this function meet my needs？
Also I will give the functions(“user handles”) a try.
Best wishes!
Anqi

4

Hi,
yes, good point, GetElectronDriftLinePoint should work. Note that by default AvalancheMicroscopic doesn’t store every single collision but only every 100th. You can change that using SetCollisionSteps.

5

Hi,
Thank you for your note.
I try the function aval.SetUserHandleInelastic(userHandle), but I have some uncertainty of the z-coordinates getting form that function . Can you give it a explanation?
Best wishes!
Anqi

6

It’s the z coordinate (in cm) where the inelastic collision occurred.

PS: the example I linked to in my previous reply was only meant as an illustration. You’ll probably need to adapt it to your needs…

7

Hi,
Thank you for your reply. Now I understand its usage.

Thank you again！
Best wishes!
Anqi

8

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