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- 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.
- PETS.mov movie for the wakefield study of the Power Extraction and Transfer Structure (PETS) in CLIC.
- A 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 MovieCoupledOutro.mov.
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PEP-X is a proposed future X-ray light source. In designing PEP-X short range wakefield due to 0.5mm bunches need to be evaluated in an 300 meter long Undulator Taper structure as shown below.
Wakefields of Undulator Taper with a 0.5mm bunch is calculated with 6000 cores and 12 hours. It used 0.25 mm mesh element size with 19 million quadratic tetrahedral elements for the whole geometry. The left hand side is the wakefield due to a 0.5 mm bunch while the right hand side is the comparison between the reconstructed wakefields of a 3 mm bunch from the wakefields of 0.5 mm bunch and the calculated wakefields for a 3 mm bunch. The comparison shows that they are in a remarkable agreement.
PEP-X Wiggler Taper
The wiggler taper in PEP-X is more than 3 times longer than the undulator taper, as shown below.
Wakefields of a 1 mm bunch is calculated and plotted below, as well as the comparison of simulated and reconstructed wakefeilds of a 3 mm bunch.
ERL Vacuum Chamber
Energy Recovery Linac is a proposed novel concept for X-ray sources comparing to XFEL. Working with scientists from Cornell University, we are making impacts on the ERL design with extreme-scale computing. The following is the brief report for calculating short-range wakefield in ERL vacuum chamber with 18000 cores on Jaguar using our INCITE allocation. The left shows the geometry of the vacuum chamber and the right shows the longitudinal wakefield due to a 0.6mm beam bunch.
Here are three versions of the movies with different sizes:
480p movie
720p movie
1080p movie
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The following is a snapshot of the electromagnetic fields in a ERL vacuum chamber, obtaining from calculating short-range wakefields due to a 0.6mm bunch using hp-refinement.
Related Publications
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