Photo-desorption from copper alloys

In support of PEP-II, a high luminosity B factory, photo-desorption of Cu alloys were measured to demonstrate suitability for ultra-high performance under high radiation loads. Results show that {eta}{sub eff}{le}2{times}10{sup {minus}6} mol/photon is a practical design value for Cu vacuum chambers. Commissioning times to attain this value in B factories can be expected to be <50 h. Pre-cleaning with Ar glow discharge was shown to be effective.