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Dumpline Status We have a leak of ~10 -4 mbar in the section inside the concrete shielding The leak is likely to be at a flange connection of the BPM (Ti/SS.

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Präsentation zum Thema: "Dumpline Status We have a leak of ~10 -4 mbar in the section inside the concrete shielding The leak is likely to be at a flange connection of the BPM (Ti/SS."—  Präsentation transkript:

1 Dumpline Status We have a leak of ~10 -4 mbar in the section inside the concrete shielding The leak is likely to be at a flange connection of the BPM (Ti/SS flange) ~70 cm from the dump window Most likely heated up by the beam The vacuum tube can be moved out and replaced by the spare (which is ready to be installed) However, we need sufficient diagnostics to ensure loss free transmission through the window remove all flange connections inside the shielding intermediate solution

2 Dumpline Austrittsfenster 620m m Loch in Betonabschirmung 240mm Button-BPM BPM/15Dump Endkammer 150m m m m CF130 Flansche Außen- 171mm radial 34.5mm Platz CF100 Flansche Außen mm radial 44.2mm Platz Bereich Betonabschirmung: Austrittsfenster, BPM/15Dump, Endkammer

3 Intermediate Solution We inserted a Cu-plate window just ds the last valve This separates the bad vacuum from the dump to the machine vacuum and allows us to open the valve The window (2 mm thick) will stand 30 bunches, provided that the beam size is larger than 1 mm we have an optics solution for this This allows us to continue with the user experiments until we have a sufficient solution for the dumpline


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