Abstract: Experimental results offered by an entire suite of diagnostics are analyzed and presented to provide a detailed picture of the overall implosion process and resulting radiation output of aluminum wire array Z-pinches, including precursor radiation during ablation, bubble-spike structure, and local bright spots at stagnation. The precursor is stable after its formation. The bubble-spike structure pays a large influence on the formation of the bright spots, which can be seen at an axial position lack of trailing mass. The comparison between a fraction of spectra with spatial resolution and frame images shows that the formation of bright spots might be influenced by the high temperature and high density condition of local imploded plasma. The X-ray streak images filtered with 50 m Be show that the spatial size of hot spots is 0.8 mm and their life time is shorter than 10 ns.