  A three-wall piston-cylinder type high pressure cell for muon-spin
rotation/relaxation experiments was designed, manufactured, tested and
commissioned. The outer cylinder of the cell body is made from MP35N and the
middle and the inner cylinders are made from NiCrAl nonmagnetic alloys. The
mechanical design and performance of the pressure cell are evaluated and
optimised using finite-element analysis. The outcomes of the experimental
testing closely match the modelling results. The high-pressure cell is shown to
reach pressures of up to 3.3 GPa at ambient temperature, corresponding to 3.0
GPa at low temperatures, without irreversible damage.
