Transcript MAIA Sensor System:

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
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
The MAIA Receiver Box
• Bread-board
• Optics
• A refrigeration
unit
– Intensified
Photodiode
sensor inside
• Overall system
enclosure
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
– Sketch, research optomechanics
– 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
– P=k*A/L*∆T
– P=1 Watt, solve eq; ∆T << 1
T1
1W
Power
• Thermal expansion concerns
– ∆x = CTE*∆T*d
– Solve for ∆x; ∆x = .013 mm << tolerances
• Neither are major issues
– Small part
– Small temperature change
T2
Final Design Part List
Final Design Cross Section
Final Design CAD
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
Acknowledgements
• Textron Systems Hawai’i
– 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?