Problems with my simulation

[sgamba2]

Hi,

I’ve been using Nebula for about a year now, and I currently have a few issues I’m struggling to understand. I would greatly appreciate your support on the following points:

1. Issue with the --key option
   When I try to run Nebula with the --key option, I receive the following error:
   terminate called after throwing an instance of 'std::runtime_error'
   what(): Unexpected key 'key'
   Aborted (core dumped)
   Could you please clarify what the correct command syntax is, or if --key is deprecated?

2. Studying electron transmittance through materials
   I am trying to use Nebula to study electron transmittance — specifically, how many electrons remain after passing through 1 μm of gold and where they stop exactly in the material, for example. This is the geometry I’m currently using:

0 -123  -500  -500      0   500  -500      0   500   500      0
0 -123  -500  -500      0   500   500      0  -500   500      0

-127 -127  -500  -500     10   500  -500     10   500   500     10
-127 -127  -500  -500     10   500   500     10  -500   500     10

-126 -126  -500  -500  -1000   500  -500  -1000   500   500  -1000
-126 -126  -500  -500  -1000   500   500  -1000  -500   500  -1000

-122 -122   500  -500  -1000   500   500  -1000   500   500     10
-122 -122   500  -500  -1000   500   500     10   500  -500     10

-122 -122  -500   500  -1000  -500  -500  -1000  -500   500     10
-122 -122  -500   500     10  -500  -500  -1000  -500  -500     10

-122 -122  -500  -500  -1000   500  -500  -1000   500  -500     10
-122 -122  -500  -500  -1000   500  -500     10  -500  -500     10

-122 -122   500   500  -1000  -500   500  -1000   500   500     10
-122 -122   500   500     10  -500   500  -1000  -500   500     10

Is that a correct geometry if starting point of electrons is (0,0,-1), with direction (0,0,-1)? What is the correct starting point of my electron?

3. Choosing the appropriate executable
   For this type of simulation, should I use nebula_cpu_mt or nebula_cpu_edep? (I'm not using a GPU). I don't get their difference.
   When I use nebula_cpu_mt, no electrons seem to exit the simulation.
   On the other hand, with nebula_cpu_edep, I do see some electrons — could you explain what these electrons represent? In particular, what does the z-coordinate in the output refer to? What is the energy of these electrons?

4. Since I see nothing with nebula_cpu_mt (even if I change to 1nm the depth of my material), should I modify something in .yaml files or in the source code?

Here attached some of my analysis scripts

studio.py
reels-pri-gold-back-0400.py

Thank you for your time
Sara