Charged hadron spectra in Cu+Cu collisions at 22.4 GeV with STAR at RHIC

STAR has studied heavy ion collisions of Au+Au and Cu+Cu at different energies in order to probe the QGP phase boundary as a function of $T$ and $\mu_{B}$. We present a study of the Cu+Cu 22.4 GeV test run at the RHIC injection energy with $\sim1$ million good events. Particle spectra are presented for $\pi\pm$, $K\pm$, $p$ and $\bar{p}$ versus $m_{T}-m_{0}$ for $|y|<0.1$ at various collision centralities. We present the integrated yield $dN/dy$, $\langle p_{T} \rangle$ and particle ratios as a function of centrality. Kinetic freeze-out properties will be studied via blast-wave model fits to the spectra. Chemical freeze-out properties will be studied using a statistical model fit of the ratios to determine $T_{ch}$ and $\mu_{B}$. Results are compared with RHIC and world data for other energies and species.