First beam into the hall

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."