  The first run of transverse polarized protons at RHIC was recently completed
which opened a new era exploring the spin structure of the proton. A first
measurement of the single transverse spin asymmetry, $A_{N}$, for leading
$\pi_{0}$ production from transverse colliding polarized protons at
$\sqrt(s)=200 $GeV, $X_{F}>0.25$ and $p_{T}\simeq 1-4 $GeV was a focus of the
STAR collaboration during the first polarized proton run at RHIC. Two new
subcomponents have been added to the STAR experiment to carry out such a
measurement in polarized proton collisions: a forward $\pi_{0}$ detector system
at approximately $7.8 $m of the STAR interaction region to reconstruct
$\pi_{0}$ mesons from their decay products $(\pi_{0}\to \gamma\gamma)$ and a
beam-beam counter with large forward acceptance to provide a means of
beam-related background suppression and relative luminosity measurement.
