ILC Computational Challenges

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ILC Computational Challenges

• Paul L. G. Lebrun
• Computing Division, Fermilab

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The International Linear Collider

• A high luminosity electron-positron collider to
  explore the Terrascale energy range.

Core components Super-conducting r.f. cavities
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The Layout of the Collider
31 km
20mr
ML 10km (G 31.5MV/m)
RTML 1.6km
BDS 5km
2mr
e undulator _at_ 150 GeV (1.2km)
R 955m E 5 GeV
x2
not to scale
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An Advanced Accelerator/Collider

• Some Technical Aspects
• High Energy Linacs
• High gradient or 31.5 MV/m
• Very long accelerators 11 km.
• High Luminosity 1034 cm-2
• High beam Power (10 MW) -gt Sophisticated
  controls of the Machine protection system.
• Small Emittance (high beam brightness)
• Damping rings
• Emittance Preservation through the acceleration
  chain.

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Computational Challenges

• Beam Physics for Software for Emittance
  Preservation
• Accurate simulation of Beam Physics and Control
  elements -gt complexity!
• The devil is in the detail..
• Integration of expert codes
• Written in different languages, running on
  different platforms
• Large number of possible defects and
  misalignments
• Tens of thousands of beam line elements, all
  moving
• Run many combinations, in parallel, on the Grid

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Improving the ILC design Outlook

• Computing Challenge
• Beam Steering serious, but solvable, require the
  grid if done accurately.
• Simulation of 3D accelerating structure requires
  tightly coupled processors!
• Yet, the current ILC design demands solving very
  challenging engineering problems
• electrical high power r.f 10MW Peak power
• mechanical sub-micron control of many elements
  over long baselines

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Beam Steering Animation