Mirror Alignment Using Dual Beam Laser

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Presentation transcript:

Mirror Alignment Using Dual Beam Laser Vinya Agluba Smithsonian Astrophysical Observatory, Submillimeter Array Research Supervisor: Rob Christensen Home Institution: University of Hawaii - Manoa

Overview Antenna Optics Layout Importance of Mirror Alignment Aligning the Mirrors Conclusion

Antenna Optics Layout Figure 1

Antenna Optics Layout Figure 2

Importance of Mirror Alignment Achieve Maximum Efficiency Align Mirrors Reduce Losses -due to: beam truncation, distortion at focusing mirrors, and absorption and reflection at windows and mirrors 230GHz – 0.7-0.8 345GHz – 0.55-0.65 690GHz – 0.4

Aligning the Mirrors Figure 3

Aligning the Mirrors M5 M4 170mm Figure 4

Problem - Solution Figure 5

Problem - Solution Figure 6

XAWTV

First Trial

First Trial Elevation: 70° 20° 40°

DS9

Second Trial

Second Trial Elevation: 65° 85° 55° 75° 35° 15° 25° 45°

Second Trial

Targets 170mm

Conclusion Align mirrors using dual beam laser Use targets to ensure the 170mm height

Acknowledgments Rob Christensen & Ant Schinckel SMA Staff CfAO University of Hawaii - Manoa Funding provided through the Center for Adaptive Optics, a National Science Foundation Science and Technology Center (STC), AST-987683.