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  • cpressercccpresser@chaos.social
    Nov 12, 2026, 5:03 PM

    Have you ever wondered how they can move the wheels or endcap on the #CMS detector without uncabling everything?

    One part of that answer is cable drag chains. Really big ones.
    This one lives between the X2 and X3 balcony on both sides ('near' and 'far') and has cables for the endcap.

    A huge drag chain filled with cables. Instead of the usual black nylon, this chain is made from sheet metal.
    Overview picture of the CMS cavern, between YB-2 and the endcap (on the left) A arrow points to this drag chain.
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  • cpressercccpresser@chaos.social
    Nov 13, 2026, 8:45 AM

    Because people complained about not getting the scale of those things, here are a few more pictures with with #blahaj #smolhaj for scale.

    Again, it is abundantly clear why everybody should carry a blahaj everywhere. They are friends and know all about particle detectors.

    Smolhaj on top of the drag chain from the 1st post. The Haj is protected from radiation and particles by its personal black bag.
    Blahaj on the X4 balcony, inspecting the top of the wheel and the helium tank.
    Blahaj looking into the UXC chamber, the endcap in the background. At the floor level (X1) a blue scissor-lift and two green cherry pickers can be seen.
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