Wire Tension Task Force Update

Roxanne Guenette (Harvard)

Diego Garcia Gamez (Granada)

APA Consortium meeting: 14 January 20191

Reminder of what we are trying to accomplish• Significantly improve wire tension measurement methods to

reduce considerably the measuring time

✓Laser method

✓Electrical method (and variations)

✓Cold Electronics method

✓Daresbury team is working on new winding head with reliable tension setting

• Assess the validity of the current tension requirements (5N±1N) (Hope to use protoDUNE data to address this)

• Assess (and develop) the quality control protocol for wire tension during production/integration/installation

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Reminder of what we are trying to accomplish• Significantly improve wire tension measurement methods to

reduce considerably the measuring time

✓Laser method

✓Electrical method (and variations)

✓Cold Electronics method

✓Daresbury team is working on new winding head with reliable tension setting

• Assess the validity of the current tension requirements (5N±1N) (Hope to use protoDUNE data to address this)

• Assess (and develop) the quality control protocol for wire tension during production/integration/installation

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Default, timescale in ~6mo - 1y

Alternative, Urgent, timescale 3-6 mo

Exploratory, timescale in ~6mo - 1y

Timescale in ~2-3 mo

Essential, Urgent, timescale 3-6 mo

Timescale in ~3-6 mo

Electrical Method (Update)

• Harvard (Sebastien & Nathan) is now setup for assessing/improving the electrical setup (many delays due to procurement of equipment, summer school and holidays)

• Thanks PSL for shipping a 35t APA and for shipping wire!

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Electrical Method (Update)

• First tests show that we are ready for systematic checks and to develop improvements

5Resonance observed in right frequency range!

Summary

• Slow progress in December

• Harvard team is now full time on this for the next 2 months

• Undergraduate students will join the team shortly

• We are still planning on parallel efforts on electrical solution (most pressing) and protoDUNE data analysis, but immediate attention to the electrical method

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