CD15 configuration and goals (revised 6/7/13)

We will use this post to keep track of what we want to do and how we need EXES setup for the cooldown.  I guess I'm the only one able to edit the post, so comment on the blog and I'll try to update the main post in response.

This is version 0.1 0.2 of the CD15 desired configuration and goals.  Version 0.0 was from discussion with Curtis and Mark one day at Ames.

Basic revision from 0.1 is that we will not be going for fast start to CD15.  Goal now is to have CD15 start such that we can turn on array Friday, Jun 21.  John Lacy will be coming to Ames Monday Jun 24.

Configuration changes from CD14:

1. Fold mirror change: Changing mirror mounts for pair of fold mirrors between echelon and echelle chamber.  By moving both mirrors 0.125" up toward the echelon and echelle mirrors, we will shorten the path length in echelon mode.  This should put echelon intermediate focus at same distance from echelle mirror as slit.
2. Focal plane: Currently thinking about using tilted focal plane, but translated 1.89 mm away from echelle mirror.  This is back to CD13 location (see Tilted detector distances post).  Need to determine time required to enable this translation.  Reasoning for this is that the path-length difference should make it so output of echelon chamber is at same distance from echelle mirror as slit.  Once path length difference is the same, we really want to have the detector at the best focus for medium mode, which we had during CD13.
3. Flip mirror stops: Moved flip mirror stops so mirror can travel beyond best alignment.  Need to know number of steps to get off stop to good position and number of steps between positions.  Want voltages for both (getting off stop and between positions), too.
4. Adjust ellipsoid: Need to shim ellipsoid to see out of window better.
5. Lens wheel:  Remove UKIRT filter.  Contrary to previous discussion, think better to leave KRS-5 and ZnSe lenses in present locations.  Especially true if detector is moved.  Add BaF2 38 mm blocker to lens wheel.  Lens wheel configuration should be (with order TBD):
1. open - no change
2. dark (mirror) - no change
3. ZnSe lens (38 mm) - no change
4. KRS5 lens (38 mm) - no change
5. ZnSe window (38 mm) - no change
6. BaF2 window (38 mm) - change from UKIRT
6. Filter wheel:  Change blocker paired with 18a to ZnSe.  Do we have ZnSe window that will fit with that holder?  Add MgF2 blockers to BP6000, BP6600, and N4582 filters.  Move BBP5500_6000+CaF2 blocker and BBP5030_5725 from decker wheel to filter wheel.  Remove N04679-4 + CaF2, Ocli R and Ocli Q with BaF2 blockers.  Filter configuration should be (with order TBD):
1. 18a+ZnSe blocker (change from KBr blocker to ZnSe)
2. BBP5500_6000 + CaF2 blocker (remove N04679-4 + CaF2 and move BBP5500_6000+CaF2 from decker wheel)
3. open - no change
4. N04582-8 + MgF2 (change from CaF2 blocker to MgF2 blocker)
5. BP6000-250 + MgF2 (change from CaF2 blocker to MgF2 blocker) 
6. BP4990_265 + CaF2 (remove Reading 6.2+MgF2)
7. BP6600-320 + MgF2 (change from CaF2 blocker to MgF2 blocker)
8. Soifer - no change
9. N07053-9 + CaF2 (remove Ocli R + BaF2)
10. BBP5030_5725 + blocker(CaF2?) (remove Ocli Q + BaF2 and move BBP5030_5725 + blocker from decker wheel)
11. N10247-9 + CaF2 (change BaF2 blocker to CaF2)
12. BP14100_850 - no change
7. Decker wheel:  Move BBP5500_6000+CaF2 to filter wheel.  Replace with N10692-9+BaF2.  Configuration should be (with order TBD):
1. BBP8000_11000 + BaF2 blocker - no change
2. BBP4700_5615 - no change
3. N10692-9+BaF2 blocker (move BBP5500_6000 + CaF2 blocker to filter wheel)
4. N03394-6E (install.  meant for 3micron HeNe)

Goals for the cooldown:

1. Best focus in medium mode.  Start with C2H2 spots.  
2. Best focus in hi-med mode.  Start with C2H2 spots.  Then do slits.  Then do med mode slits.
3. Image pupil.  Like to adjust echelle mirror focus with ZnSe and KRS5 lenses to see if can get a clear best focus.  Also, adjust echelle angle to take advantage of tilted detector for focus effects.
4. Look at window to check ellipsoid alignment.
5. Try bounce test to see if flip mirror vibrates now that not against stop.
6. Filter curves for all filters in filter wheel.  Also do angles <45 degrees for filters in decker wheel.(see impact of alignment and blockers)
7. Compare angles <|45| to see if low mode better at negative or at corner cube.  Choose three filters (short, medium, and long wavelengths).  If can do line profiles with H2O in cell, great.  Careful of tilted focal plane.  Curious about throughput, too.
8. If time, TAAS to see if alignment better.
9. Imaging room with N10247 and CaF2 blocker.  If photon flux too high, try with BaF2 blocker in lens wheel as well.  

Comments?  Questions?  Let me know.