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Status of beam pipe for SVD1.5

Status of beam pipe for SVD1.5. Y.Yamada at SVD meeting on Feb.10, 2000. Budget for the beam pipe for SVD1.5 was approved last week. Vacuum test on the first beam pipe will finish soon. Rate of out gas (2.5 x10 -10 Torr*litter/s/cm 2 ) is worse than normal Al

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Status of beam pipe for SVD1.5

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  1. Status of beam pipe for SVD1.5 Y.Yamada at SVD meeting on Feb.10, 2000 • Budget for the beam pipe for SVD1.5 was approved last week. • Vacuum test on the first beam pipe will finish soon. • Rate of out gas (2.5 x10 -10 Torr*litter/s/cm2) is worse than normal Al • by one order and it may be a main reason of worse vacuum(10 –6 Pa) • than those in other regions. • Uniformity test of vacuum sputtering of Au will be done soon. • HOM calculation is in progress. • Increase of HOM from present pipe is estimated to be about 30 %. • Heating by HOM is under study by Stanic with MAFIA and ABCI. • Schedule • Machining will start late Feb. and be finished end of May. • Welding of cooling line will be done in Apr. • Vacuum sputtering of Gold on Be pipes will be done in May. • Final assembly will be done in June. • Delivery date will be July 7th.

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