Design and Modeling of Dark Matter

Axion Detectors

Gabe Rizzo

QuarkNet Summer Program

28 July, 2016

Outline

• Background on me

• Dark matter axions

• The ADMX experiment

• My contributions to experiment

• Acknowledgments

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Who am I?

• High school senior

• Oak Park and River Forest High School

• Interested in aerospace engineering

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Dark Matter

• Makes up 24% of observable

mass/energy

• Does not interact or emit

electromagnetic radiation

• Likely made of particles

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Principle of Axion Detection

• Low temperature microwave cavities in strong magnetic field

• Axion microwave photon coupling

• Microwave photon detection

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Existing Axion Search Experiments

• ADMX (Axion Dark Matter eXperiment)

• Sidecar experiment

• Fermilab high frequency R&D

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How Does ADMX Work?

• Microwave cavities

• Inductor/capacitor circuit

• “Listening” for signal

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Low Noise High Power Amplification

• Power signature at Yoctowatt scale (10-24 watts)

• HFETs

• SQUIDs

HFET Amplifier Squid Amplifier

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ADMX Results

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High Frequency Detector Design

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Parameter Based Models

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Connection to Existing ADMX Equipment

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Connection to Existing ADMX Equipment

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Railgun test courtesy of US Navy

Connection to Existing ADMX Equipment

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Tuning on ADMX

• Two tuning rods to tune cavity

• Linear tuning system for antennas

• What's the difference?

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Tuning Rod Assembly

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Tuning Rod Assembly

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Attocube ANR101 Actuator

Linear Adjustment Assembly

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Cold Fingers

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New Old

Future Plans

• Fine tune design

• Build prototype

• Collect data

• Implement multiple cavity design

• Find axions!

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Acknowledgments

Thank you to:

• Quarknet (Chris Stoughton, Laura Thorpe, George Dzuricsko)

• Fermilab

• Andrew Sonnenschein

• Aaron Chou

• Daniel Bowring

• Benjamin Cain

• Chris Cameron

• Chiara Salemi

• Juan Takase

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Acknowledgments

Big Thanks To: Drake

For design inspiration

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