DURING THE LAST FEW YEARS, INTEREST HAS GROWN IN single-wall carbon nanotubes (SWCNTs) that can be produced by different processes, including the arc process, laser ablation process, chemical vapor deposition (CVD), and gas phase processes, such as carbon monoxide disproportionation. The laser ablation process developed by Rice University researchers is known to produce the highest percentage of SWCNTs and uses a double-pulse laser oven method. Normal operating conditions for this method utilize a green laser pulse (532 nm) followed by an infrared laser pulse (1064 nm) within a few nanoseconds to ablate a metal-containing graphite target. The target is located in a flow tube maintained in an oven at 1473K with argon flow of 100 sccm (standard cc per minute) at a pressure of 500 Torr. These conditions are important in optimizing the production of single-wall carbon nanotubes and can be used to scale up this process for large-scale commercial use. Previous work, mostly accomplished at Rice University, reported on the effect of oven temperature and briefly mentioned the possible effect of flow conditions. No systematic study had been done earlier.