Recent fixes/improvements in adxv at MacCHESS
Adxv is a viewer for displaying diffraction images during data collection.
I think adxv was originally written by folks at ADSC and has been modified by
numerous folks over the years. I claim credit for only a few recent tweaks in
the version used at MacCHESS.
Saving images
Several bug fixes and tweaks were made to the File>Save feature (menu
shown below).
- Saving images in TIFF and PostScript has been fixed for
workstations with graphic cards having more than 8 bit depth (i.e. most
workstations you will find today).
- The default filename and format have been changed to make TIFF
the default.
- Saving the Line window as a TIFF or PostScript file
has been enabled, but make sure that no other windows overlap the Line
window; its bitmap is not saved.
To make a full-resolution image, set the Scale to 100% in the Adxv
Control window. The resulting output will cover the full image, not just the
portion visible in the display window.
Setting the beam center
A couple improvements have been made to ease the setting of the direct beam
center in the Adxv Settings menu (see below).
- The arrow buttons for moving the beam center have been modified to
auto-repeat when the mouse button is held down.
- A Pick Center button has been added. Choose this option by clicking
the button. The next point in the image window or magnify window picked with the
mouse left button will be entered as the beam center.
- The Pick 3 option of Resolution Rings offers another method
to set the beam center, described below.
Resolution Rings
Several improvements have been made to the Resolution Rings option.
- On the advice of steamed colleagues who complained about "menu
proliferation", the Resolution Rings menu has been moved to the Adxv
Settings window (see above).
- The pre-existing option of 5 uniformly spaced resolution rings has been kept
as the 5Ring option.
- A new option, Anchor1, draws a single resolution ring through a point
selected with the left mouse button. The ring is updated as the beam center is
moved, but always includes the picked point.
- Another new option, Pick3 provides a method of setting the beam
center by selecting 3 points with the left mouse button. The 3 points define a
circle, and the beam center is assigned to the center of the circle.
- Option Behenate draws a series of rings corresponding to the low
resolution rings of Ag behenate based on dividends of 58.38 Angstroms. These
can be useful for calibrating the detector distance.
- Two other menu options for automatic refinement of the ring center and
automatic refinement of distance with Ag behenate are not finished and are not
active at present.
A resolution ring created with the Anchor1 option.
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