@auriga60 Thanks for sharing your build and that bit of information. It helped me narrow in on understanding dark matter creation, and cut through a lot of the rumors. In kind, I decided to share my build as well, in hopes it might useful to others.
I went with a 4-beam architecture using eight particle accelerators. It is completely automated and produces about 24 dark matter every 20 min, or 1.2 DM/min. To control the automation I used a timer, OR gate, invert cell, and state cell from ProjectRed. The timer is set to a couple of seconds after the particles collide (e.g. 43 seconds). Then it triggers the invert cell which runs a redstone signal into the OR gate for about 1.1 seconds just to shut the particle accelerators off and reset their operation. Afterwards, the invert cell returns to its normal OFF state allowing the accelerators to turn on and begin the whole process all over again. Simply hook up an ME system to the accelerators or use a JABBA barrel or something to make sure there is always junk to accelerate and that you can pull out your dark matter. In my case I used EnderIO item conduits and set them to run in parallel, then just set some whitelists on the conduits at certain points. Also, FYI, I have creative energy cells from TE supplying power for this test build, but it seems like each accelerator is using 5,000 RF. So you can only run two accelerators per redstone energy conduit line when you power these in your survival game.
It is a fairly expensive build being there are 5988 electromagnets in the design. Although it would be easy to build, it's certainly something you would work up to in survival. What makes this nice is the facility is sufficiently large enough in perimeter that I can just run an antimatter ring around it and share the electromagnets. This allows you to have an all-in-one location for your antimatter/dark matter needs.
Pics are in the spoiler tags:
