DBSP-R Upgrade Progress Review: Key Developments and Enhancements for 2011

1. DBSP-R Progress Review DBSP-R UpgradeProgress Review 2011-01-06 The DBSP-R Team

2. Motivation for the Upgrade DBSP-R Progress Review • Much greater QE at reddest wavelengths. • Spectral length doubled. • Improved ease of use. Additional benefits: • Lower noise (<2.5e- @20s read time) • 15µm pixels instead of 24µm; low lateral charge diffusion. • No fringing. • Standardization of electronics and software. • Improved LN2 hold time (30+ hours).

3. DBSP-R Progress Review Optics

4. Optics (Viswa) DBSP-R Progress Review • Window lens specs as per Epps’ design (originally for flat CCD, like ours). • Status: • Flat window (for testing) in hand. • Lens window shipped from HJOL to coating company. Expected next week.

5. DBSP-R Progress Review Mechanical

6. Mechanical – Dewar Body DBSP-R Progress Review • Dewar ordered form IR Labs. • Vendor compliance checked. • Expected: first week of February.

7. Mechanical – Dewar Base (Khanh) DBSP-R Progress Review • Basic design: DONE. • Detail drawings in progress.

8. Mechanical – Flexure FEA DBSP-R Progress Review Aluminum rings • Mass mounting surface : • Detector mask : .4 lb • Cold shield : .3 lb • Detector standoff assy : .6 lb • (including detector package) Total deflection of 0.6µm with the mass of 1.3 lbs Cable feedthrought holes Spacer G-10 CR,.020” thk sheet Total deflection of 5.5µm with the mass of 13 lbs

9. Mechanical – Detector Mount DBSP-R Progress Review Detector support areas Flexure mount mount pocket Detector mount plate Spring leaf

10. Mechanical – Head Installation Proc • Sliding the detector standoff assy • over the two guiding shafts for • installation from the back of dewar • base. • Sliding the detector mask • over the two guiding shafts for • installation from the front of dewar • base.

11. Mechanical – Detector Electronics Box DBSP-R Progress Review • Modifications for patch panel: DONE. • Mounting assembly: Released for fab.

12. DBSP-R Progress Review Electronics

13. Electronics - External DBSP-R Progress Review • Detector Controller + Boards in the lab: in testing. • Patch Panel Board: in fabrication. • Heater PCB: template from Antarctic camera. • Controller Box wiring: • Boards to Patch Panel. • Hermetic connectors to Patch Panel. • Cables: • Dewar to Cass Cage Rack.

14. Electronics - Internal DBSP-R Progress Review • Fanout PCB: to be designed. • Internal wiring: • Fanout Board to hermetic connectors. • Detector mount temperature control. • Dewar body temperature control.

15. DBSP-R Progress Review Computer and Software

16. Computer and Software (Jennifer) DBSP-R Progress Review TCP/IP sockets PCI Driver • Only the communication between the ArcVIEW server and the interface driver (PCI vs. EDT) changes in the new architecture. • The new DBSP RED ArcVIEW server is essentially identical to the current DBSP BLUE ArcVIEW server except for detector specific configuration parameters. Custom C code DBSP BLUE ArcVIEW Server TCP/IP sockets Sync Module DBSP BLUE GUI interface DBSP RED GUI interface PCI Driver TCP/IP sockets Custom C code DBSP RED ArcVIEW Server Aux Monitor GUI interface Auxiliary Monitor ArcVIEW Server TCP/IP sockets

17. Computer, OS and Dev Tools DBSP-R Progress Review • The computer used for deploying DBSP-RED will be one of a set of 5 identical computers installed at the observatory to upgrade the instrument computer infrastructure. Systems already delivered, installed and operational • A laboratory version of the instruments computers used at the observatory has been built with identical hardware and software to use as a development platform at Caltech. Hardware assembled, cloning completed • Replace the current DBSP RED ArcVIEW server with a copy of the DBSP BLUE server and then configure for the new detector. Development code assembled and under version control • Advantages • Maintains a consistent software architecture for the DBSP instrument at the observatory. • Eliminates the risk inherent in deploying a new solution. • Minimizes the time required to develop the software for the instrument.

18. Projected Deployment Sequence DBSP-R Progress Review • Develop with the laboratory computer • Deliver the laboratory computer to the observatory. • Deploy the DBSP_RED2 code developed at Caltech onto the existing instrument computers as test in tandem with the development computer. • Delivery to the observatory should consist of a new version of the ArcVIEW server configured for the new detector that will simply replace the contents of the existing DBSP/RED directory. - Actually create a new DBSP/RED2 instrument

19. DBSP-R Progress Review Management

20. Schedule – Lab activities DBSP-R Progress Review Critical milestones: Fab Jan • Dewar body: Feb 4 • Dewar base: Feb 20 Feb • Fanout PCB: Feb 25 Integ • Dewar assembled: Feb 25 Mar Test • Detector warm test: March 4 • Detector cold test: March 11 Apr • Pre-ship Review: April 25 • Off-telescope test: April 27 Tel May • First Light: May 4

21. Schedule - Commissioning DBSP-R Progress Review • Pre-installation (off-telescope): April 28-30. • Cass cage rack modules (Leach power, Lakeshore, connector plate). • Cables. • Palomar staff support required. • Mount dewar and run tests with calibration lamps (some risk for incoming observers…) • First commissioning: May 4 or 5. • Measure throughput and flexure/tilt with standard stars. • Second commissioning (if necessary): July 2 or 3.

22. Budget DBSP-R Progress Review • Expenditures through early December 2010: • Materials = $36K (controller, mechfab) • Labor = $142K • Commitments = $25K (dewar, optics, Lakeshore) • Budget FY10 = $260K • Available = $57K • Projected expenditures: • Labor (team) = $130K • Projected Materials (shop fab) = $6K (106 hours) • Deficit = $79K

23. Budget – Projected Team Load DBSP-R Progress Review Projected Labor Cost = $130K