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Heater Control and Plasma Optimization

Matthew Bohman

ALPHA Collaboration

University of Michigan Semester at CERN

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Bakeout and Heater Control

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Heater Control Schematic

PC TCP Server

Ethernet to Serial Adapter

Heater Controller

Heater

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New System

PC

Heater Controlle

r

Heater

Serial Data

Current

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Plasma Optimization

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Three Body Recombination

Anti-Hydrogen Formation

Radiative Recombination

Small, dense, and cold plasmas will maximize anti-hydrogen formation rates

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Formation Rates

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Rotating Wall

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Uncompressed Plasmas

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Partially Compressed, Centrifugally Separated

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Fully Compressed Plasmas

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Cooling

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Evaporative and Sympathetic Cooling

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Evaporative Cooling

40 60 80 100 120 140 160 180 2000

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100

150

200

250

300

350

400

450

500

EVC (%)

Tem

pera

ture

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Sources:Slide 6, 7, 8, 13: images and equations from

E. Butler, Antihydrogen formation, dynamics and trapping,

Ph. D. thesis, Swansea University (2011).

Slide 12: image from EUROfusion