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Physics Department

Location: 180-204
Phone: (805) 756-2448
Fax: (805) 756-2435
Chair: Jennifer Klay

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HiLumi LHC Crab Cavity Simulations

What We're Doing

Using PyHEADTAIL, we are simulating the effects of different noise distributions imposed by Crab Cavities on the emittance rate of proton beams in the Large Hadron Collider (LHC).

We are simulating the beam using a six-dimensional Gaussian model where the six dimensions are x, y, z, and their respective momentums.

Our intent is to minimize the emittance rate in order to keep the beam as populated as possible.

What are Crab Cavities?

As the beam travels through the cavity, it is given a transverse kick which turns it in such a way that it will collide more completely with the opposing beam.
The beam then passes through another crab cavity and is kicked back to its original orientation.

Why We're Doing This

With the scheduled upgrades for the LHC, the inclusion of crab cavities will be necessary to optimize the performance of the HiLumi LHC.
While the crab cavities are designed to increase the efficiency of the collider, if they are callibrated incorrectly they will instead amplify the variations within the beam, causing a drastic decrease in efficiency.


PyHEADTAIL is an n-body simulation code for simulating macro-particle beam dynamics with collective effects developed by CERN for use on simulations regarding the Large Hadron Collider.


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