How to restart the animation of a particle system? I create an expulsion so my particle system has the following settings:

End frame = Start frame + 1

I mean the value of the end frame is one frame larger than the value of the start frame. 

Life time = 6

velocity = 8 

Those settings create an expulsion starting from the start frame. What if I need this expulsion to start at frames 10, 50 and 100? Is it possible to Restart the expulsion? 

I can't animate the start frame or the life time. Animating the number of particles doesn't work.
I think you need (3) separate Particle settings for that, like so:



Also a gif: