  The general-purpose Compact Muon Solenoid (CMS) detector at the Large Hadron
Collider (LHC) at CERN includes the hadronic calorimeter to register the
energies of the charged and neutral hadrons produced in the proton-proton
collisions at the LHC at a centre of mass energy 13.6 TeV. The calorimeter is
located inside the superconducting solenoid of 6 m in diameter and 12.5 m in
length operating with a direct current of 18.164 kA that creates the central
magnetic flux density of 3.81 T. To fit optimally to the high pileup and high
radiation environment of the High Luminosity LHC, the existing CMS endcap
calorimeter will be replaced with a new high granularity calorimeter (HGCal)
comprising the electromagnetic and hadronic sections. The hadronic section in
each of two endcaps of the HGCal will include 22 stainless steel absorber
plates with a relative permeability value of 1.000588 at to the central
magnetic flux density of 3.81 T. The calculation of the electromagnetic forces
to the absorber plates due to orthogonal and angular misalignments of the HGCal
endcaps with respect to the coil axis is performed with a three-dimensional
computer model of the CMS magnet using the method of calculation described
earlier.
