Designing an Intensified Photodiode Mount MAIA Sensor System: Designing an Intensified Photodiode Mount Keizo Gates Akamai Internship

Overview MAIA Laser System MAIA Sensor MAIA Receiver The Need for a Mount The Design Process The Final Result

The Big Picture Existing MAIA Laser in the Beam Director/Tracker (BD/T) telescope 2500 Hz max rep rate 11 ns pulse length 54 MW peak power AEOS 3.67 m telescope Largest in the Dept of Defense Using Coudé room 5 The MAIA Sensor System Talk about the two telescopes Where the maia sensor is located Brief on applications.. Ranging, radiometry

The MAIA Sensor System Used in the AEOS Consists of Collection optics Intevac Intensified Photodiode sensor Supporting electronics Real time data collection and processing RT Linux PC Signal processing Software three major components in the sensor system

The MAIA Receiver Box Bread-board Optics A refrigeration unit Intensified Photodiode sensor inside Overall system enclosure Existing CAD by Charlie Crandall Explain everything on the board. Explain my task.

Identify the Problem Need to Secure the IPD Sensor Mount 15mm lens & allow for 10mm focus adjustment Contain the BiasT & Amp Products for Research Thermal Cooler

Design Process Brainstorm possible solutions Select the best idea Sketch, research opto-mechanics Gather input Select the best idea Detail design Communicate the result Prototype the product

Design Details Constraints, Issues & Concerns Length limitations Fixing the sensor without stress Containing BiasT, Amplifier, & Wires Securing the lens assembly Temperature

Design Analysis Amp heat concerns Thermal expansion concerns P=k*A/L*∆T P=1 Watt, solve eq; ∆T << 1 Thermal expansion concerns ∆x = CTE*∆T*d Solve for ∆x; ∆x = .013 mm << tolerances Neither are major issues Small part Small temperature change 1 W Power

Final Design Part List Review each part

Final Design Cross Section Assembly that fits into Products for Research cooling unit. Point out sensor, bias T, Amplifier, amp mount Point out custom part Say how the sensor is secured Point out lens assembly, O ring, Explain lens movement

Final Design CAD Point out the custom aluminum part Point out the amp mount

Conclusions Design consists of one custom part Next Steps Interfaced with Thorlabs components Two modified Thorlabs components Next Steps Machine the parts Assemble the parts Install into the MAIA Sensor box

Acknowledgements Textron Systems Hawai’i Products for Research Paul Konkola, Charlie Crandall, Michael Reiley Products for Research Center for Adaptive Optics Malika Bell, Lisa Hunter, Hillary O’Bryan Maui Economic and Development Board Isla Yap References AMOS: http://www.maui.afmc.af.mil/ Textron Systems: http://www.systems.textron.com

Questions?