The yoke is composed of barrel section of octagonal shape and
endcaps. At the same time, it serves as a hadron absorber. The
total weight is 740 tons.
The thickness of the endcaps is determined by the magnitude
flux, while the thickness of barrel section is dictated by the
requirement of an effective absorption of hadrons.
The barrel section of yoke is fixed in the collision region
of the storage ring VEPP-4M; note that every octant comprises 4
plates of (230 + 230 + 230 + 200) mm thick, with spacers located
at the corners of the plates. The spacers ensure 100 mm slites
between the plates in the octants in which the muon chambers are
placed.
The yoke octants are assembled on the mantle rings. In these
rings and inner plates of the octants there are adjustable stops
to positioning and fixation of the coil.
The endcaps may extend outside, thereby making the inner
elements of the detector accessible. In them there are the holes
for the light guides of scintillation counters and the slots for
cables.
