Mark and I mapped out how the beam translates at particular parts of the instrument in response to fore-optics ellipsoid translations. Note that we did these measurements before and sent out an email report, but there was a mistake in the recording of those values (actually, a pair of axes were swapped). The following measurements were redone on 9/19/2011.
Below is a chart of our measurements and a photo to define the axes. We set out to measure beam translations at these locations: slit (front wall of the slit/filter/decker cassette), echelle grating, and echelle paraboloid.
Here are our measurements:
ellipsoid motion beam measurement location beam motion
---------------------------------------------------------------------------------------------
-3mm, EE front of slit cassette -5mm, EE
-6mm, EE -10mm, EE
-3mm, FE -5mm, Z
-5.4mm, FE -8mm, Z
-3mm, FE echelle paraboloid -13mm, FE, +2mm EE
-3mm, EE -12mm, EE, -2mm, FE
-3mm, FE echelle grating +7mm, FE
-5.4mm, FE +13mm, FE
-3mm, EE -7mm, EE
1 comment:
I will post a followup with the table columns and the drawing fixed.
Post a Comment