Aligning LOW and High Magnification Images on the TOUCH SCREEN

The software stores the position of the beam center in each camera is a
pair of coordinates between 0 and 1.  This is the fractional distance
along X and Y as measured from the lower left corner of the image.
These coordinates are stored in:

/data/calibrations/beam_in_camera1.txt (High magnification)
and
/data/calibrations/beam_in_camera2.txt (Low magnification)

To align the LOW magnification image to the HIGH magnification image so
that they coincide on the TOUCH SCREEN:

1) Physically adjust the camera and prism on the LOW magnification
camera so that it's at the same location on the TOUCH SCREEN as that of
the HIGH magnification image.
2) In a terminal window on an 8.3.1 computer type the following linux
command:

cp /data/calibrations/beam_in_camera1.txt /data/calibrations/beam_in_camera2.txt
***************************************************

Optimizing the Horizontal Pin Hole on BL8.3.1

DHS must not be running
Tune up the beam using best_chi2.com
Make sure Horizontal stage movement is enabled on the PMAC
Issue the "tune_pinhole.com command"
The script will do the rest.

***********************************


Jeff Dickert wrote:

> I scanned through a few dozen images from BL5.0.1, looking for blanks.
> I found just one, immediately after a pause was done while I entered the
> hutch.
>
> The exposures for these shots was particularly long - 120 seconds.

For examining the images in batch, you can use a little utility called
adsc2pgm, which you can download from:
http://bl831.als.lbl.gov/~jamesh/elves/goodies.html#adsc2pgm

Toni has used this before.  This program is meant for producing a PGM
version of the .img file, but it also does an estimate of the "scale" of
each image.  You can examine a bunch of images like this:

foreach file ( /data/dcsuer/whatever/*.img )
set scale = `adsc2pgm $file nutn.pgm -zoom 0.1 | awk '/intensity
scale/{print $NF}'`
echo "$file $scale" | tee intensity.log
end
sort -n intensity.log

higher scales indicate dimmer images.

Hope this is useful,

-James