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Synergia talk at 2014 SIAM Conference on Parallel Processing for Scientific Computing

James Amundson presented a talk entitled "​Accelerator Beam Dynamics on Multicore and GPU (and MIC) Systems"​ at the 2014 SIAM Conference on Parallel Processing for Scientific Computing, February 2014.​​ Th slides are available here​.

2/28/2014 11:07 AMJames F Amundson
Synergia in Fermilab Today

​Synergia is featured in today's SCD column in Fermilab Today.​

7/3/2013 2:08 PMJames F Amundson
Synergia adds support for composite jobs

The Synergia workflow system, Job_manager, now includes support for composite batch jobs. Batch jobs can now be created using multiple values for individual paramters. Job_manager now creates separate subjobs for each set of parameter values and combines them into a single master job. This development allows users to directly utilize leadership-class resources for parameter scans.

4/16/2013 2:54 PMClementine P. Jones
MadX support added to Synergia

Synergia now reads accelerator lattices in MadX format

The current version of Synergia now includes support for reading lattice files in MadX format in addition to the previously available internal and Mad8 formats. This new capability will enable easier simulation of many machines, in particular all of the machines in the CERN accelerator complex.


Attachment4/16/2013 8:18 AMKimberly Myles
ComPASS collaboration awarded SciDAC-3 funding

The ComPASS collaboration received funding under the DOE SciDAC-3 program to develop and apply state-of-the-art techniques in high performance computing and applied mathematics to problems in accelerator modeling and design.

​ ​


Attachment10/4/2012 12:00 AMEric G Stern
GPU- Accelerated Synergia talk

Recent work on utilizing single- and multi-GPU resources for Synergia has resulted in a factor of 20x speedup.

We describe the Synergia architecture and the re-implementation of core elements in CUDA to take advantage of GPU resources.  We have done significant algorithmic studies of the charge deposition step on the GPU architecture. The final result achieves peak performance exceeding that of an entire Linux cluster.


Attachment5/11/2012 12:00 AMEric G Stern
Multicore Optimization for Synergia2

Recent optimization work for Synergia2 on multicore architectures has resulted in an improvement in strong scaling behavior by at least a factor of 8.

A description of recent work to optimize Synergia2 for multicore architectures utilizing a hybrid MPI-OpenMP approach. We describe multiple hybridization options, each demonstrating much better scaling behavior than the pure-MPI approach. In all cases, we extend strong scaling by at least a factor of 8. We expect different optimization schemes to be optimal on different architectures.


Attachment5/11/2012 12:00 AMJames F Amundson
2010 ComPASS all-hands meeting

Please mark your calendars: the 2010 ComPASS all hands meeting will be in Menlo Park on December 7th and 8th, hosted by SLAC. The focus of the meeting will be on reviewing the current state of code development and application activities, enhancing collaborative work, and preparing for SciDAC3.

The meeting will start at 1:00 pm on the 7th. We will have three sessions: Advanced Accelerators (conveners Warren Mori and David Bruhwiler), afternoon of the 7th; Beam dynamics (conveners Robert Ryne and Jim Amundson), morning of the 8th; Electromagnetics (conveners Cho Ng and John Cary), afternoon of the 8th. The conveners of each session are working on the agenda, please contact them if you would like to present. Note that we would like to put emphasis on future plans both for applications and for development (including new architectures).


10/29/2010 12:00 AMPanagiotis Spentzouris
ComPASS scientists win a 2010 OASCR visualization award

Greg Schussman, Lie-Quan Lee, Liling Xiao, Cho Ng and Kwok Ko of SLAC and Ken Moreland of Sandia National Laboratories won a 2010 SciDAC OASCR Award for Outstanding Achievement in Scientific Visualization at the SciDAC Conference held in Chattanooga, Tennessee, July 11-15, 2010 for the simulation of short bunch wakefields in an ERL vacuum chamber using parallel hp refinement with a moving window, performed on the world’s fastest supercomputer at Oak Ridge National Laboratory and visualized using ParaView. ​

8/3/2010 12:00 AMPanagiotis Spentzouris
Workshop on ComPASS finite-element electromagnetic code suite ACE3P- CW10

Accelerator Code Workshop CW10 for the ACE3P (Advanced Computational Electromagnetics 3P) code suite will be held at SLAC, September 22-24, 2010. For details, see


8/3/2010 12:00 AMPanagiotis Spentzouris
ComPASS codes help optimize Tevatron running parameters

The ComPASS code BeamBeam3d has been enhanced at Fermilab and used to improve Tevatron running.

The results of a multi-year study with the BeamBeam3d code has just been published in published in Physical Review Special Topics - Accelerators and Beams.  The  paper describes a comprehensive simulation incorporating multiple beam dynamics processes including machine optics derived from measurements, beam-beam effect simulation, multiple bunch interactions, chromaticity and impedance.  Each effect is individually validated against measured data when available or analytic calculations.  Finally, the simulation is used to support a lowered chromaticity during Tevatron setup reducing beam loss and improving performance.




3/9/2010 12:00 AMEric G Stern
Calming the wakefield - ComPASS simulation appears on International Science Grid

For the International Linear Collider to run at maximum performance, each of its 27,000 cavities must be designed as precisely as possible. Read more

9/16/2009 12:00 AMPanagiotis Spentzouris
ComPASS simulations used to improve operational parameters for the Fermilab Tevatron

Fully 3D multi-beam-dynamics-process simulations of the Fermilab Tevatron have been used to support a change of chromaticity at the Tevatron, thus leading to reduced losses.

Validation studies and results from Fermilab Tevatron simulations including multiple beam dynamics effects were submitted to Phys.Rev.ST Accel.Beams.   The essential features of the simulation include a fully 3D strong-strong beam-beam particle-in-cell Poisson solver, interactions among multiple bunches and both head-on and long-range beam-beam collisions, coupled linear optics and helical trajectory consistent with beam orbit measurements, chromaticity and resistive wall impedance.  Individual physical processes were validated against measured data where possible, and analytic calculations elsewhere. The simulation was used to study the effects of increasing beam intensity with single and multiple bunches, and study the combined effect of long-range beam-beam interactions and transverse impedance at the Tevatron.  The studies were used to support the change of chromaticity at the Tevatron by a factor of two at the squeeze, by demonstrating that even the reduced beam-beam effect from long-range collisions may provide enough Landau damping to prevent the development of head-tail instability.  The new operation parameters lead to reduced losses.
This research used resources of the Argonne Leadership Computing Facility and the National Energy Research Scientific Computing Center for the application development and all production runs.

8/19/2009 12:00 AMPanagiotis Spentzouris
Collaboration meeting on Dec 2nd and 3rd
8/5/2009 12:00 AMPanagiotis Spentzouris
ComPASS team helps diagnose a CEBAF issue

At Jefferson Lab, scientists use CEBAF (Continuous Electron Beam Accelerator Facility) and three experimental halls to study quarks, gluons, protons and neutrons inside the nucleus with CEBAF and its three experimental halls. Read more at​

7/16/2009 12:00 AMPanagiotis Spentzouris
Synergia at the 2009 Leap to Petascale Workshop

Synergia was profiled running on BlueGene/P.

Synergia2 profiled with the TAU Performance System, <> as a result of participation in the Leap to the Petascale workshop at Argonne. The results are immediately useful in efforts to enhance the parallel scalability of Synergia2.




Attachment6/1/2009 12:00 AMEric G Stern
Code workshop on ComPASS finite-element electromagnetic codes (CW09)

CW09 will be held at SLAC on September 4, 2009. See this link for details:

5/27/2009 12:00 AMPanagiotis Spentzouris
Visualization for ComPASS simulation reported in SciDAC Review Magazine

The article "NEXT-GENERATION Visualization Technologies: Enabling Discoveries at EXTREME Scale" in SciDAC Review Magazine, Number 12, Spring 2009, highlights a collaboration between SciDAC Institute IUSV and ComPASS on visualization of accelerator cavity simulation using ParaView.

The SciDAC Institute for Ultra-Scale Visualization aims to enable extreme-scale knowlege discovery by advancing the state of visualization technologies, fostering awareness of and communication about new visualization technologies, and placing these technologies into the hands of application scientists. Read more at
4/28/2009 12:00 AMPanagiotis Spentzouris
ASCR feature article on ComPASS work

The article describes the work carried out by ComPASS researchers at SLAC in understanding wakefields in linear colliders through an INCITE award.

When you’re building a $6.75 billion, 31-kilometer device to crash subatomic particles, you want to be sure it works the best it can. “Do-overs” can be expensive – or impossible.   Read more at



4/16/2009 12:00 AMPanagiotis Spentzouris
ComPASS & ITAPS collaboration wins best paper award

ComPASS & ITAPS collaborators won the best meshing technical poster award at the 17th International Meshing Roundtable conference.

Dr. Xiaojuan Luo of RPI won the best meshing technical poster award at the 17th International Meshing Roundtable conference held from October 12-15 2008 in Pittsburgh. The joint work with Professsor Mark Shephard of RPI (ITAPS) and Drs. Lie-Quan Lee, Cho Ng, Lixin Ge of SLAC (ComPASS) was a collaboration between ComPASS and SciDAC CET ITAPS in support of parallel finite-element electromagnetic simulations for accelerator projects. The poster can be seen at ​Meshing Poster.


Attachment2/17/2009 12:00 AMPanagiotis Spentzouris
ComPASS Researchers win OASCR visualization award

J. R. Cary and T. Austin, supported in part by the COMPASS project, won one of the 10 "OASCR" visualization awards given out at the annual meeting of the U.S. Department of Energy’s Scientific Discovery through Advanced Computing (SciDAC) program held in Seattle July 13–17.

SciDAC held an Electronic Visualization and Poster night July 13 as part of its 2008 meeting. Fifty-two entries took part in the competition, and 10, including the COMPASS/Tech-X entry submitted by J. R. Cary and T. Austin, won OASCR (for Office of Advanced Scientific Computing Research) awards.
9/17/2008 12:00 AMJohn Cary