Log entry time 17:21:38 on July26,2004

Entry number 129745

Talked to Jay Benesch: there are two options for changing optics to increase 
the effectiveness of the raster for tomorrow's studies.  The first is the 
standard Hall A optics, and the second is the optics we're using now but with 
all quads after the raster turned off.

I didn't quite understand the difference characteristics of the two options, 
but apparently both are easy and do what we want.  Jay can be paged when this 
is set up to guide MCC's efforts, and he expects this to be no problem.  

So, we're "go" for bigger raster tomorrow.

Second: talked to Matt Poelker about the source.  He estimates with confidence 
that we can get about 70 uA from the laser.  This is a product of being at 
high-polarization wavelength, and can't be much boosted.  To get more power, we 
need to steal the Hall C laser (rephase that laser to create "A" beam).  This 
is, of course, invasive to C.  The setup and back-out for this procedure is 
very fast (few minutes, according to Matt) so we may be able to get away with 
this for relatively brief tests (if we can get Hall C to go along with it).

So, we're good for 70uA of beam current, and to get higher we need to start 
discussions with Hall C.