[Gate-users] On Creating a Source

[loyal]

Dear all,
I have several questions on creating a source:
1. When defining two cold areas in a phantom, it seems that the second Forbid command doesn't work at all. Why? And how can I define several cold areas? My related command lines are as follows:
/gate/source/source_name/gps/Forbid cold_area0
/gate/source/source_name/gps/Forbid cold_area1

2. A source with a cold area in was defined, when calculating the concentration, should the volume of the cold area be deducted from the volume of the source?

3. The users guide tells us that the confinement slows down the simulation, but I found that the speed of the simulation is only about thousandth of that without confinement, is it in a normal condition?

4.What's the function of the following command?
/gate/source/source_name/dump 1