MAIA Sensor System:

1
MAIA Sensor System

• Designing an Intensified Photodiode Mount
• Keizo Gates
• Akamai Internship

2
Overview

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

3
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

4
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

5
The MAIA Receiver Box

• Bread-board
• Optics
• A refrigeration unit
• Intensified Photodiode sensor inside
• Overall system enclosure

6
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
7
Design Process

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

8
Design Details

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

9
Design Analysis
T1
T2

• Amp heat concerns
• PkA/L?T
• P1 Watt, solve eq ?T ltlt 1
• Thermal expansion concerns
• ?x CTE?Td
• Solve for ?x ?x .013 mm ltlt tolerances
• Neither are major issues
• Small part
• Small temperature change

1 W Power
10
Final Design Part List
11
Final Design Cross Section
12
Final Design CAD
13
Conclusions

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

14
Acknowledgements

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

15
Questions?