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There are only two roughing pumps in the whole hutch, and only one does the heavy lifting. The other is not in use unless the SRD folks need to pump down a section on the end of SB3 or on the GON.*insert diagram here of roughing lines*
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Nitrogen and Air Supply
The Nitrogen lines can be and often are filled with compressed dry air (CDA). The N2 dewar is located near the roll up dorr
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