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Log entry time 09:32:29 on April 8,1999
Entry number 17417
keyword=odd behavior of injector charge asymmetryFor large slope and offset on the hall C TACO box, ie. the helicity-correlated laser current correction, we are seeing a two-peak structure to the charge asymmetry that we don't yet understand. Picture 1 is a dramatic demonstration of this effect, with the Hall C offset set to 1V (nominal zero offset is at 5V on a 0-10V scale). But we see a clean gaussian for small corrections on the TACO box, as seen in picture 2 where the offset was set to 4.65V. Because this is clean for small offsets, we're fairly confident we can know that we're nulling the Hall C charge asymmetry with the TACO box.
FIGURE 1
FIGURE 2
