ATLAS@Home is a research project that uses volunteer computing to run simulations of the ATLAS experiment at CERN. You can participate by downloading and running a free program on your computer.

ATLAS is a particle physics experiment taking place at the Large Hadron Collider at CERN, that searches for new particles and processes using head-on collisions of protons of extraordinary high energy. Petabytes of data were recorded, processed and analyzed during the first three years of data taking, leading to up to 300 publications covering all the aspects of the Standard Model of particle physics, including the discovery of the Higgs boson in 2012.

Large scale simulation campaigns are a key ingredient for physicists, who permanently compare their data with both "known" physics and "new" phenomena predicted by alternative models of the universe, particles and interactions. This simulation runs on the WLCG Computing Grid and at any one point there are around 150,000 tasks running. You can help us run even more simulation by using your computer's idle time to run these same tasks.

The program you will download runs simulation software inside a virtual machine hosted by your computer. The virtual machine image is ~500MB but is only downloaded once. Each workunit downloads a small set of input data and runs for approx 1 to 2 hours depending on the computer's processor speed.

THE ATLAS@Home PROJECT IS STILL UNDER DEVELOPMENT, and it cannot be guaranteed that jobs will be free from errors or that there will always be work available, but do not hesitate to contact us at

The Physics of ATLAS@Home

No knowledge of particle physics is required, but for those interested in more details, at the moment we simulate the creation and decay of supersymmetric bosons and fermions, new types of particles that we would love to discover next year, as they would help us to shed light on the dark matter mystery!

For more information on the physics processes simulated in ATLAS@Home as well as the ATLAS experiment itself visit our public page.

Join ATLAS@Home

  • Read our rules and policies
  • This project uses BOINC. If you're already running BOINC, select Add Project. If not, download BOINC.
  • This project also requires VirtualBox to be installed.
    • Windows: VirtualBox is included in Windows distributions of Boinc and so does not have to be installed separately.
    • Mac and Linux: VirtualBox must be installed separately
  • In case of problems using the latest version of VirtualBox try using version 4.2.16.
  • After choosing Add Project in Boinc Manager, choose ATLAS@home from the list of projects
  • Then either enter details for to set up a new account, or if you have previously registered enter the existing account details.
    • A reasonably powerful modern 64-bit computer with at least 4GB of memory is required to run ATLAS@Home. Enabling 64-bit virtualisation may require some changes in BIOS settings.
    • In Boinc Manger set the % of processors used to be at most 50%, otherwise your computer may run out of memory.
    • The work units may use a lot of network bandwidth, so a slow internet connection may reduce work unit efficiency
    • The work units contact servers at CERN and outside CERN. If you are behind a firewall you will need to open access to these servers. Please contact us for details.
  • If you're running a command-line version of BOINC, create an account first.
  • If you have any problems, get help here.

User of the day

User profile Profile Wabi CZ
My name is Milos and I am 53 years old. I live in Brno, which is a wonderful town in The Czech Republic. I am interested in DC projects very much. I...


Beam is back in the LHC
Dear all,

a major milestone has been achieved today. One beam has circulated around the LHC after 2 years of maintenance for upgrade. Follow us on :

Thank you to all the volunteers contributing to ATLAS simulation!

5 Apr 2015, 15:33:59 UTC · Comment

Server maintenance today
Dear volunteers,

we are migrating part of server infrastructure today, which will take few hours. In the meantime there might be a lack of workunits to send and the boinc server will be unavailable for an hour or so. We will let you know when the maintenance is over.
1 Apr 2015, 6:48:07 UTC · Comment

Change in disk space needed
Dear all,

This morning we have reduced the disk space needed to run the simulation.

The updated disk space is 4.5GB.

24 Mar 2015, 13:37:15 UTC · Comment

5000 concurrent running jobs - milestone !
Dear all,

We would like to share with you the exciting news of reaching a significant milestone of more than 5000 concurrent running jobs!

Thank each one of you for her/his contribution!

ATLAS@home team.
9 Mar 2015, 9:55:18 UTC · Comment

Screen saver
Dear all,

to answer some questions raised several times.

We are working on a new version of the software that will allow volunteers having access to information about the executing WUs.

One of the feature will be do have a screensaver and/or page displaying events as they are produced. A preview of a typical view of event is attached. There are still issues with the various type of operating system used by volunteers and it might require a few more time of debugging unfortunately.

We would be very interested to know which informations volunteers would like to be displayed or having access to. Your inputs are more than welcome.

6 Feb 2015, 15:06:03 UTC · Comment

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