1. Magellan Planet Finder Spectrograph Jeff Crane (OCIW) Steve Shectman (OCIW) Paul Butler (DTM)

2. 230 April 2005SAC Meeting Background Extrasolar planet search using the iodine absorption cell Doppler methodExtrasolar planet search using the iodine absorption cell Doppler method Currently ~6 MIKE observing runs/yearCurrently ~6 MIKE observing runs/year Want an instrument that is more optimized than MIKE for velocity measurementWant an instrument that is more optimized than MIKE for velocity measurement

3. 330 April 2005SAC Meeting PFS vs. MIKE Higher resolution (R4 grating vs. R2)Higher resolution (R4 grating vs. R2) Better optical qualityBetter optical quality Better thermal controlBetter thermal control Very high quality flat-fielding (TDI)Very high quality flat-fielding (TDI) Careful slit and pupil illuminationCareful slit and pupil illumination

4. 430 April 2005SAC Meeting Numbers R4 reflection gratingR4 reflection grating R ~ 40,000 / arcsecR ~ 40,000 / arcsec 0.7” x 3.5” slit, could go as small as 0.2”0.7” x 3.5” slit, could go as small as 0.2” 4096 x 4096 15  m pixel CCD4096 x 4096 15  m pixel CCD 0.09”/pixel0.09”/pixel Complete coverage for 3900< <6200ÅComplete coverage for 3900< <6200Å Goal is  v ~ 1 m/sGoal is  v ~ 1 m/s

5. 530 April 2005SAC Meeting Optical layout – spectrograph Optical design similar to one MIKE channel

6. 630 April 2005SAC MeetingEchellogram

7. 730 April 2005SAC Meeting Optical layout – fore optics Functions: Focal reduction from f/11 to f/5 Slit viewing/centering Slit focus

8. 830 April 2005SAC Meeting Mechanical design *** Overall structure not yet finalized. One possibility

9. 930 April 2005SAC Meeting PFS on the telescope Clay telescope nasmyth mountClay telescope nasmyth mount StaticStatic 3-point ¼” thick mount points welded to nasmyth platform3-point ¼” thick mount points welded to nasmyth platform

10. 1030 April 2005SAC Meeting Operations Day(s?) before each run: Refresh dewar vacuumRefresh dewar vacuum Possibly enable active thermal controlPossibly enable active thermal control During the run: lN each morning lN 2 each morning Day of the run: Instrument change – alignment easy (!?) Instrument change – alignment easy (!?)

11. 1130 April 2005SAC Meeting Timeline Currently: Optical design completeOptical design complete Solid model design ~1/3 completeSolid model design ~1/3 complete First Light: Fall 2006 ish Upcoming: Optical figuring begins within weeks Optical figuring begins within weeks Machining begins late Summer Machining begins late Summer

12. 1230 April 2005SAC Meeting

13. 1330 April 2005SAC Meeting Fore optics – slit focus

14. 1430 April 2005SAC Meeting Fore optics – slit centering