DEIMOS
Quarterly Report
Number 19
January
1 to March 31, 1999
Element 8 of the camera has been completed and sent to Coherent for optical coating. Camera fabrication is continuing, and assembly of elements into the first camera cell is expected in the current quarter.
The design of the Grating system is complete, which completes the last major design activity on DEIMOS.
The work continued testing devices from MIT/LL’s lot 9 and 10 devices for which DEIMOS contracted for its science detectors. Results continue to be disappointing, with the CTE being lower than needed.
Two of the FC CCDs have been run and tested in the DEIMOS test dewar. Results are very encouraging.
Some testing of the DEIMOS CCD controller was carried out in the quarter, but this activity was heavily impacted by ESI.
We are currently reviewing the schedule for the detector system and dewar in detail in preparation for work to resume on this part of the project. In April, we expect fabrication of the dewar system to resume.
No fabrication was done on DEIMOS during the quarter, nor were any of the stages worked on (including the rotational drive).
The effort on ESI continued to heavily impact the DEIMOS schedule during this quarter. We did start to reassess the schedule and presented that schedule to the SSC in March. As ESI continues to slip its schedule, the schedule for DEIMOS continues to have uncertainties.
2.1 Optics
Element 8 is being coated. Work on two BK7 glass clear filters has begun and will be finished in the current quarter.
2.2 Mechanical
Camera
Three parts of
the camera body were contracted to Danco. We have received the first body part
back, and it is now ready for quality control measurement and assembly of the
first doublet. The other two parts are expected back by the end of the quarter.
Assembly of the camera is expected to be a major activity in the next quarter.
Filter
Wheel
No work in this quarter
Gratings
The detail design
has been completed, and the drawings prepared for fabrication of the small grating
sliders (#3 and #4). The material is here. The set of grating installation tooling
has been designed and is ready for fabrication. The grating cell which allows
a small grating to be used in the large slider (#1) has also been designed.
The grating slide drive has been modified to fit the re-designed "front
end structure."
Slit
Mask
No work in this quarter
Dewar
No work in this quarter
TV
Guider
No work in this quarter
2.3 Detectors
Testing continues on MIT/LL devices.
2.4 Software
There was very little DEIMOS-specific software activity during Q19.
Reduced availability of software staff:
Software modifications to existing ESI CCD readout software were made to support:
· Readout of a 2 x 1 mosaic of Orbit CCDs.
· Readout of two flexure compensation CCDs.
CCD readout software in the CCD controller, VME crate, and instrument computer were generalized to handle arbitrary-size CCDs. Similar modifications were made to the image display software, figdisp. All of these modifications have now been successfully tested via the readout of the FCS CCDs and of the 2 x 1 Orbit CCD mosaic from the test dewar.
Other than intermittent work on testing the DEIMOS science CCD controller and adjusting the configuration of the DEEP and DEIMOS RAID disk controllers, there was no other DEIMOS-specific software activity this quarter.
Much of the Q19 ESI-related software activity, especially that involving automated instrument testing and documentation tools, should be directly applicable to DEIMOS during its integration and test phase.
A copy of the DEIMOS Software status report I presented at the Keck Software Coordinating Committee meeting held April 12 at Caltech can be obtained by emailing Bob Kibrick.
2.5 Electronics
No activity this quarter
2.6 Flexure Compensation
No activity this quarter
2.7 Alignment
No activity this quarter
No report this Quarter
[Tables and figures are not available via the web. Please contact Heather (heather@ucolick.org) for more information]
The project budget and spending are summarized in Table 1. Details are shown in Tables 2, 3 and 4. At the end of the quarter we had spent $5.1 million on the project, or approximately 93% of the approved budget.
Table 3 summarizes the expenditures on manpower. Approximately 61,000 hours of effort have been expended on the project to the end of the quarter, or about 87% of the total budgeted. Figure 1 graphically shows the expenditure of manpower.
Expenditures on materials and supplies are summarized in Table 4 and in Figure 2. By the end of the quarter we had expended $2.3 million of the $2.5 million materials budget.
The project schedule is shown as Figure 3. A more detailed milestone schedule is shown in Figure 4. The project schedule remains affected by the effort on ESI and will be reviewed in detail in the next quarter.
Milestones for Quarter 19:
Milestones for the next quarter: