3.3.5.1 Top Hat Fluence
The Top Hat computational results displays a value for the Max and Min fluence observed in a
Top Hat beam’s energy profile. This result is affected by which Top Hat method is being
employed. The Top Hat Fluence Pass/Fail edit control items are applied to both the Max and
Min fluence results. It is anticipated that the Minimum Pass/Fail limit is primarily applicable to
the Min results, and that the Maximum Pass/Fail limit is primarily applied to the Max results.
Thus an energy intensity range can define the acceptable limits of the Top Hat beam’s working
surface area.
3.3.5.2 Divergence Pass/Fail
The following results may be monitored from the Divergence… dialog below the main menu
Pass/Fail item.
Figure 44
3.4 Window... Drop Down Menu Selections
Note: The numbers appearing in front of the selections will vary with the screen setup.
Tile
1 Results
2 <Frame> (Beam display window)
3 <W x H x R> (Pan/Zoom window)
4 <T:tt R:rr> (Tilt Rotate Window)
5 Histogram (Histogram display window)
Click on one of the numbered items to restore and activate the window.
Operator’s Manual LBA-PC
Doc. No. 10654-001, Rev 4.10
101
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