  This work reports the testing of a Forward Calorimeter (FoCal) prototype
based on an n-type Si pad array detector at the CERN PS accelerator. The FoCal
is a proposed upgrade in the ALICE detector operating within the pseudorapidity
range of 3.2 < $\mathrm{\eta}$ < 5.8. It aims to measure direct photons,
neutral hadrons, vector mesons, and jets for the study of gluon saturation
effects in the unexplored region of low momentum fraction x
($\mathrm{\sim10^{-5} - 10^{-6}}$). The prototype is a $\mathrm{8\times9}$
n-type Si pad array detector with each pad occupying one cm$^2$ area,
fabricated on a 6-in, 325~$\mathrm{\pm 10 \thinspace \mu}$m thick, and
high-resistivity ($\sim$7 k$\Omega \thinspace$ cm) Si wafer which is readout
using HGCROCv2 chip. The detector is tested using pion beams of energy 10~GeV
and electron beams of energy 1-5~GeV. The measurements of the Minimum Ionizing
Particle (MIP) response of pions and the shower profiles of electrons are
reported.
