Thanks once again for passing by and regularly reading my blogs!
The pictures alone are gorgeous (are they supposed to be gorgeous or just interesting?).
I imagine you refer to the three pictures related to real detectors, that are indeed very beautiful (in my opinion). I have unfortunately never seen those detectors with my own eyes. The IceCube detector lies in Antarctica, so that visiting it may forever be an issue because of distance. The NOvA one is located at Fermilab, close to Chicago. I however don't know to which extent it can be seen in action. The same holds for the KATRIN detector based at KIT (Karlsruhe Institute of Technology).
For the rest, what you summarised is correct. Note that instead of talking in terms of mass, it is better to talk in terms of energy. Mass is just one form of energy, as kinetic and potential energy. What is important is that the total energy budget is conserved in any process. Then it is possible to convert some energy of a given type (e.g. mass) into some energy of another type (e.g. kinetic energy).
I am looking forward for any further questions you may have later today (which is tomorrow for you ;) ). Have a great week too!