Difference between revisions of "First beam into the hall"
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| + | * Empty target clearance: 1 inch ideal between reference cell and target foils; we will know the exact number after survey. From Ellen: "The ideal "No target" clearance is 1 in. It should be something close to that, but may change by a bit depending on where the reference cell ends up when they install it. There is also a small amount of error on the motor positioning, which I will have a better number for after the next survey, but shouldn't be more than 100 microns or so." | ||
Revision as of 12:11, 22 September 2022
https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1186
- Empty target clearance: 1 inch ideal between reference cell and target foils; we will know the exact number after survey. From Ellen: "The ideal "No target" clearance is 1 in. It should be something close to that, but may change by a bit depending on where the reference cell ends up when they install it. There is also a small amount of error on the motor positioning, which I will have a better number for after the next survey, but shouldn't be more than 100 microns or so."
