ATRAP II: Preparing for the Future

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ATRAP IIPreparing for the Future

• Christopher Jones University of Iowa
• Supervisor Dr. Cody Storry
• 8 August 2002

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• Leading the Effort to Produce and Store Cold
  Antihydrogen
• Operates Out of the Antiproton Decelerator at
  CERN

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Why Make Antihydrogen?

• Simplest Anti-atom
• Spectroscopy
• Study CPT Invariance

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How To Make Cold Antihydrogen?

• ATRAP uses a nested Penning trap to accumulate,
  cool, and store antiprotons and positrons.

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Nested Penning Trap
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Nested Penning Trap
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ATRAP II

• More Space (25x Current Trap)
• Ioffe Trap
• Lasers
• More Detectors
• 3 Layers of Fiber for Tracking p-pbar
  annihilation
• BGO and Silicon Microstrip for Tracking ee-

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My Project Paving the Way for ATRAP II

• There is a room set aside for the new trap,
  called Zone II.
• It is my duty to prepare this room for the
  arrival of the traps magnet in early August.

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2 Phases of Zone II Preparation

• Physical Room Preparation
• Concrete Blocks
• Painting
• Vacuum Preparation
• Tubes
• Gauges
• Valves
• Pumps
• Controls

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Physical Preparation

• Made 12 Concrete Blocks

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Physical Preparation

• Made 12 Concrete Blocks
• Used Them to Build a Wall

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Physical Preparation

• Made 12 Concrete Blocks
• Used Them to Build a Wall
• Painted the Wall (To Eliminate Dust)

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Vacuum System (Inside)
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Vacuum System (Outside)
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1st Successful Pump Down!
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Current Vacuum Stats

• Vacuum of 7 x 10-7 Torr achievable in 12 hours
  pumping time.
• No leaks greater than 2 x 10-8 mbar L s-1

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Conclusions

• Temporary Vacuum System Works
• Future Work
• Complete the System
• Continue Leak Checking Shoot for no leaks
  greater than 10-9 mbar L s-1
• Construct Automated Vacuum Control System
• Situate Vacuum Controls Inside Zone

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Special Thanks To

• All the members of the ATRAP group, especially
  those who directly worked with me
• Nathaniel Bowden
• Paul Oxley
• Heiko Pittner
• Dr. Joseph Tan

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And, of Course
Dr. Cody Storry
Christine Nattrass
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This Work Was Made Possible By . . .

• Jean Krisch, Homer Neal, Tom Dershem
• University of Michigan
• CERN
• National Science Foundation
• Ford Motor Company