[Archive] Questions regarding electronSecondaryEmission bit 2

SPIS
1

Message by Lea Steinert:
Hi,
I’m currently trying to test whether and how secondary emission from secondary electrons (“hoping”) can be simulated in SPIS-Geo.
For this case, I designed a small test element consisting of a circular conductor (ALU) on a cubic dielectric (CERS) in a LEO environment. Then, I defined in the global parameters, in section Surface Interactions the parameter “electronSecondaryEmission” to be equal to 7.
Unfortunately, the simulation stops after a few seconds and gives me the following error output which I’m not able to detect the fault in:
14.07.2015 10:56:00 java.util.prefs.WindowsPreferences
WARNUNG: Could not open/create prefs root node Software\JavaSoft\Prefs at root 0
x80000002. Windows RegCreateKeyEx(…) returned error code 5.
java.lang.NullPointerException
at spis.Util.Monitor.FieldMonitor.monitorKineticEnergy(FieldMonitor.java
:1244)
at spis.Util.Monitor.FieldMonitor.monitor(FieldMonitor.java:498)
at spis.Util.Monitor.FieldMonitor.monitor(FieldMonitor.java:761)
at spis.Top.Simulation.SimulationFromUIParams.integrate(SimulationFromUI
Params.java:3906)
at spis.Top.Simulation.SimulationFromUIParams.integrate(SimulationFromUI
Params.java:4020)
at spis.Top.Top.Scenario.integrate(Scenario.java:106)
at spis.Top.Top.NumTopFromUI.integrate(NumTopFromUI.java:180)
at org.spis.ui.simulation.command.LaunchSimulationCommand$1.run(LaunchSi
mulationCommand.java:91)
at java.lang.Thread.run(Unknown Source)

What might cause the complications to run the simulation? What else has to be changed in addition?
Thank you in advance,
Lea

2

Message by Jean-Charles Mateo-Velez:
Hi,
this may come from bad initialization of population monitors (here the kinetic energy) when activating/deactivating some processes. The best is to go back to global parameter panel and cllick in " save and build simulation". I have no problem when activating electronSecondaryEmission = 7. Have you tried with electronSecondaryEmission = 3 ?

3

Message by Lea Steinert:
Hi,
I went back to the global paramters, saved them an restarted the simulation. Unfortunately it’s still not working.
However, electronSecondaryEmission = 3 is running perfectly fine.
What do you mean with bad initialization of population monitors? Do I have to feed the simulation with other inputs?
Thank you in advance,
Lea

4