it isn't the kind of camera that takes a picture of what the human eye might ever see
it doesn't focus an image on to a flat surface
but it does create a visual image of real events
it is a complex and layered series of several arrays of pixel-type detectors that can record and measure the scattering of sub-atomic particles in a 3D matrix and will then create an analogous visual diagram for the human eye and mind to analyze and interpret
in order to capture the data in a form that can be analyzed, the complex apparatus has to be constructed in a special chamber that will give it "life-support"
the experiments need low-temperatures ... strong magnetic field ... vacuum
the ALICE camera is therefore constructed within a larger apparatus
https://home.cern/news/news/accelerators/lhc-collides-ions-new-record-energy
the complete unit is ??? how big ???
https://home.cern/science/experiments/alice

alice is currently being re-engineered, upgraded, re-built ... the original design conference took place in 1993 ... so we're 27 years in to the experiment with some way still to go
https://en.wikipedia.org/wiki/ALICE_experiment
http://aliceinfo.cern.ch/Public/Welcome.html
http://aliceinfo.cern.ch/Public/en/Chapter2/Chap2Experiment-en.html
https://home.cern/science/experiments/cms
https://home.cern/news/news/experiments/subterranean-ballet-alice
the new inner silicon detector array ...
https://www.youtube.com/watch?v=-olro8on6M0
? what would happen if i put my hand into the proton beam ?
https://www.youtube.com/watch?v=_NMqPT6oKJ8