User name mack
Log entry time 12:37:30 on February 12,1998
Entry number 3257
keyword=Fast Raster at Rmax=2mm.The fast raster is initialized for 1-pass and Rmax=2mm (nominal). See Figure 1.
This corresponds to a significantly larger area than our canonical value of 1 mm amplitude in both X and Y. However, we know we're going to have problems with density reduction in the Helium isotopes, and we would like to run the Hydrogen isotopes in the same configuration. Dave Potterveld is happy with 2 mm for now. The reason we don't push to higher amplitudes is partly because we have no experience there and partly because it would make the acceptance more difficult to model (after all the H and V magnifications are roughly 3; the rastering shows up at the focal plane too!) When we spoke about this 2 weeks ago Rolf was also happy with 2mm as a maximum.
FIGURE 1
