Introduction
This INCITE project started in 2008 with 4.5 million hours. In 2009 we were awarded 8,000,000 Processor Hours on Cray XTs at Oak Ridge National Laboratory to carry out the simulations for possible future linear colliders such as International Linear Collider and Compact Linear Collider.
Brief 2009 Plan
Three main tasks for FY09 have been outlined in the original proposal. The first task is to evaluate the heat load on cavity interconnects from power generated from the transit of a beam in a multi-cavity structure including cross-talk effects between cavities. The second task is to simulate wakefield effects in a multi-cryomodule RF unit with an ideal shape. The third task is to determine the effect of Lorentz force detuning through the multi-physics analysis of the ILC cavities.
We will carry out the first task as planned. We will revise the second to simulate the wakefields in cryomodules including shape deformations and cavity misalignments. It has been shown that from measurements that these effects have significant impacts on cavity performance and beam quality. Simulation will help cavity builders to determine the requirements on quality control during the fabrication process so that the cavity will perform as expected. On the third task, we have already studied the effect of Lorentz force detuning on cavity performance using our multi-physics
analysis code TEM3P in this allocation year.
In addition to the tasks proposed for the ILC, we will perform simulations to help explore high-gradient concepts such as the Compact Linear Collider (CLIC) proposed by CERN. In particular we will apply the SciDAC electromagnetic codes to design and optimize the CLIC Power Extraction and Transfer Structure (PETS) to further develop CLIC's two beam acceleration scheme. The PETS involves a LARGE complex 3D design that can only be modeled accurately using INCITE-scale resources.
Reports and Results
You can find talks, reports, papers and summaries for 2008 here
For 2009:
You may find more past accomplishments Omega3P Past Accomplishments, ILC Simulations, and https://mpi.slac.stanford.edu:8443/ext/index.php/T3P here.
Latest Results
- The following is a snapshot of the electric fields in a coupled PETS and accelerating structures in two-beam module for Compact Linear Collider (CLIC). A more detailed studies are in the process.
- [Image:CoupledSystem.png ]
- A https://mpi.slac.stanford.edu:8443/external/INCITE_08/PETS.mov movie for the wakefield study of the Power Extraction and Transfer Structure (PETS) in CLIC.
- A https://mpi.slac.stanford.edu:8443/external/INCITE_08/choke.mov movie for optimizing a Choke cavity (high-gradient concept).
- here is the link to a movie of the coupled PETS and a accelerating structure in [Media:MovieCoupledOutro.mov ] or in animated gif format[MovieCoupledOutro.gif]
Related Publications
If you need more information, please contact Lie-Quan Lee by email at liequan@slac.stanford.edu or by phone at 650-926-5356.