DEIMOS Update
2002 Oct 17
Schedule Summary
Month
Eng
Nights
Sci
Nights
Jun
3 + 2×½
1
Jul
2 + 2×½
4
Aug
1
7
Sep
3
9
Oct
3
9
Nov
0
0
Dec
1
1
Instrument Status
Most mechanisms work reliably; slitmask system problematic
Datataking system generally robust; hangs 1/wk
Science interface completed
FCS interface progressing
Mira/AUTOFOC working well
SKY/FACSUM generally working
Internal FCS fully functional; GUI under development
Recent Accomplishments
Hosted successful runs by 4 non-DEEP science teams
Commissioned guider flexure compensation algorithm
Reduced MIRA completion time to 4 minutes
Released slitmask calibration GUI
Made slitmask alignment procedure more robust
Completed startup/shutdown checklists
Began support astronomer training
Trained summit technicians in slitmask pathologies
Adapted
instr_menu
widget for DEIMOS
Issues/Problems/Concerns
Slitmask system continues to cause trouble with jammed masks
CCD crate hangs
CCD bias jumps
CCD power supply instability
CCD thermal instability due to termperature readback problems
DCS communication problems continue to occur frequently
SKY rotator preview not computing time-to-limit properly
Slitmask shipping/handling procedures require revision
FCS user interface needs enhancements
DREMEL software still not user-friendly
Guider failures cause significant lost time; confusion re: software vs. hardware faults
Top 10 List (CARA)
Fix DCS disconnect problems
Fix SKY rotator time-to-limit algorithm
Analyze engineering data
Complete observer documentation/web pages
Create observer instrument configuration form
Address slitmask receiving procedures
Enable data archiving
Repair and spare PXL guider system
Define preventive maintenance tasks
Calibration Tool
Acquires arcs and flats for multiple masks at a given spectrograph setup (grating/filter/wavelength)
Configurable for number of exposures, exposure time, and line lamp combinations
Enables acquisition of calibration data during dinner time or after going to bed
Gregory D. Wirth <wirth@keck.hawaii.edu>
