1. have to use LH2 to see the result of spot++ finally 2. have to turn off the clock pulse
After following these two instruction, spot++ result of 11*8.5 (MCC) raster size looks OK. Thanks Bob!
PS: What Bob said was not showed up in the run plan that RC gave us. What
the run plan said is to use 5uA beam on Carbon target to check the spot++.