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.

On this page you can see ATLAS monitoring of the tasks running on ATLAS@Home, as well as how ATLAS@Home ("BOINC") compares to the other sites on the WLCG.

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.

Please consult or post to the message boards to learn more about the work currently available or in case of problems.

The Physics of ATLAS@Home

No knowledge of particle physics is required, but for those interested in the physics processes simulated in ATLAS@Home as well as the ATLAS experiment itself visit our public page.

ATLAS@Home tasks progress, for each task (number of jobs done/total number of jobs):

  • Task mc15_13TeV QCUT5_CFilterBVeto.simul (7078879): 1783/80000
  • Task mc15_13TeV hdamp172p5_dil.simul (6911522): 75170/78600
  • Task mc15_13TeV hdamp172p5_dil.simul (6739439): 79335/80000
  • Task mc15_13TeV 160_250.simul (6573834): 138963/139920

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 fthibaud0001
25 years in the computing business and now woodworker and shaman Kin 154: WHITE SPECTRAL WIZARD I dissolve in order to enchant Releasing...


New Task + New application version 1.41
Dear all,

The new task uses a new software version and therefore a new image was created.

Please let us know if you are having any problems with this version.

Thank you for your cooperation and support!

25 Nov 2015, 13:18:08 UTC · Comment

New task
Hi All,

We ran out of WUs and it will take some time to get new tasks defined for ATLAS@home.

The new task will be available ASAP.

Sorry for the inconvenience and thank you for your support!

23 Nov 2015, 8:31:29 UTC · Comment

Unexpected downtime
Dear volunteers,

the atlasathome server was unexpectedly reset today, and was then unavailable for few hours. It's up and running again now.

Sorry for inconvenience.

Best regards,
19 Nov 2015, 15:46:47 UTC · Comment

Over 8.000 concurrent WUs : a new record!
Dear all,

a new record for ATLAS@home,
over 8.000 active WUs !

Thank you to all the volunteers participating in the ATLAS simulation effort!
10 Nov 2015, 0:04:32 UTC · Comment

Short database intervention Nov 10
Due to database maintenance ATLAS@Home will be unavailable for up to one hour from 6.30 to 7.30 UTC on 10 November. Thanks for your understanding and continued contributions! 9 Nov 2015, 8:32:06 UTC · Comment

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