1. PALM-3000 PALM-3000 Instrument Architecture Antonin Bouchez PALM-3000 Requirements Review November 12, 2007

2. PALM-3000 2 Instrument Concept Instrument Requirements Document: http://www.oir.caltech.edu/twiki_oir/bin/view.cgi/Palomar/Palm3000/SystemsEngineering PALMAO components to be reused: AO cart (used to transport the AO system) AO spit (used to support the AO system during lab work) AO optical bench and Cassegrain interface support structure. Relay optics: eg. Off-axis parabolas (OAP), fast steering mirror (FSM), fold mirrors. 349-actuator Xinetics deformable mirror (DM349). Low-Order Wavefront Sensor (LOWFS), as an interim tip/tilt/focus sensor. Project phases: Phase 0: Interim relay (current optics recoated, focus shifted). Phase 1: Develop and deploy DM3368, HOWFS, wavefront processor, etc. Phase 2: Develop and deploy IRTT, TWFS and related electronics and software.

3. PALM-3000 OAP1 OAP2 FSM DM3368 DM349 FM2 FM3 FM1 3 Optical Layout (1) AO Stimulus: Simultaneous NGS and LGS stimuli. X-Y translation of NGS stimulus to accommodate multiple instruments. AO Relay: A single off-axis parabola relay. DM3368 at the pupil DM3349 conjugate to <±1.5 km.

4. PALM-3000 4 Optical Layout (2) Wavefront sensor beam splitting Large beamsplitters (6-8”) are fixed, only changed out with instruments. Splitter #3 on actuated stage to switch between NGS and LGS modes. Space constraints pose greatest chanllenge.

5. PALM-3000 Beam Splitter Layout Schematic IRTT HOWFS TWFS ACQ Science Instrument #1 #2 #3

6. PALM-3000 6 Wavefront Sensors High Order WFS (Phase 1) NGS and LGS sensor, using CCD50 detector (128x128) 8x8, 16x16, 32x32, 64x64 pupil sampling. Adjustable field stop for spatial filtering. Infrared Tip/Tilt WFS (Phase 2) Wide-field imaging camera based on HAWAII2-RG. Full-field acquisition and region-of-interest readout. Single filter, J+H (1100-1780nm). Low-Order WFS (Phase 1) 3x3 Shack-Hartmann sensor using CCD39. Truth WFS (Phase 2) 2x2 Shack-Hartmann sensor using CCD39 Provides focus and back-up tip/tilt capability.

7. PALM-3000 7 Electronics Cassegrain Cage Controller rack DM349 driver rack DM3368 driver rack. Active cooling! Computer room Wavefront Processor: NVIDIA 8800 GPUs (17) Housed in 9 PCs Telemetry server Data room Operator workstation CAM I/F SWT I/F GPU 2GPU 1 CPU PC 1 Burst Data RAM SWT I/F Disk Array CPU PC 8 CAM I/F SWT I/F DM I/F LWFP CPU PC 0 Switched Network … … D/A Data Server Ether- Net I/F Gigabit Ethernet Data User 1 Data User n … …

8. PALM-3000 8 DM control algorithms Solution: Implement both pathways for DM349 control.

9. PALM-3000 9 Operational Systems Software Provide low-level control of all AO system functions (servo loop state, motor positions, etc.) Provide displays of system status and performance (live display of servo loop state, WFS pixels, DM actuator positions, servo loop strip charts). High-level automations: Guide star acquisition on all wavefront sensors Wavefront sensor background recording Wavefront sensor to DM registration Flexure and atmospheric refraction compensation Phase-diversity measurement of the static aberrations seen by the science instrument Optimization of the LGS reconstructor using Palomar MASS C n 2 data

10. PALM-3000 10 Laser Guidestar Facility Planned Improvements Relocate the Chicago Sum Frequency Laser to the lower Coude lab. Potentially space of a second laser in the same lab. Improvements to LLT image quality are still required. Aircraft safety system automation based on Table Mountain Observatory system. Lower Coude