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In a vacuum system of the KEKB accelerator that is a two ring electron-positron collider, there are nearly 10,000 control points. A large number of vacuum related components should be controlled and/or monitored at the rings and the beam transport line from the linac. Those component hardwares are connected to their sub-interfaces such as ADC interfaced by devices of CAMAC, RS-232C, GP-IB, and programmable...
TiO 2 -SiO 2 -MgO catalyst was prepared and the OH radicals formed on the catalyst contacted with water were studied by the spin-trapping method. The condition of the catalyst surface that can produce OH radicals is optimized. The initial concentration of OH radicals on the surface does not influence the rate of the photocatalytic decomposition of hydrogen peroxide.
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