  We present the design and initial prototype results of a pixellized proton
beam profile monitor for the COMET experiment at J-PARC. The goal of COMET is
to look for charged lepton flavor violation by direct muon to electron
conversion at a sensitivity of $0^{-19}$. An 8 GeV proton beam pulsed at 100 ns
with $10^{10}$ protons/s will be used to create muons through pion production
and decay. In the final experiment, the proton flux will be raised to $10^{14}$
protons/sec to increase the sensitivity. These requirements of harsh radiation
tolerance and fast readout make diamond a good choice for constructing a beam
profile monitor in COMET. We present first results of the characterization of
single crystal diamond (scCVD) sourced from a new company, 2a systems
Singapore. Our measurements indicate excellent charge collection efficiency and
high carrier mobility down to cryogenic temperatures.
