What is LHC@home?

This a volunteer computing project that uses Internet-connected computers to advance Particle and Accelerator Physics. Participate by downloading and running a free program on your computer. By default, you can run the classic LHC@home application Sixtrack, for simulations of accelerator physics, and help researchers at CERN to improve the LHC.

Other LHC@home simulations that utilizes virtualization to run applications for Theory and experiment simulations for ATLAS, CMS and LHCb are also available.

Please note that some of the applications on LHC@home requre Virtual Box to be installed. Please visit the LHC@home information site for more information. If you have any problems or questions please visit the Message Boards, Questions and Answers and FAQ.

Join LHC@home

User of the Day

User profile Profile Ricardo Wagemaker
Head of Backup in a large bank, technical SME and love programming, tinkering, developing for fun. I wish I had studied quantum physics and quantum...


Best wishes for 2022
The LHC@home team wishes you all a Happy New Year and all the best for 2022!

The simulations carried out under LHC@home contribute to improvements to the LHC accelerator as well as the experiments. The upcoming Run 3 of the LHC shall start soon.

Meanwhile you can take a look at this video with highlights from CERN during 2021.

Many thanks for your contributions and happy crunching!
5 Jan 2022, 12:29:14 UTC · Discuss

Lack of CMS tasks due to a problem in WMAgent development
Unfortunately, I have been unable to submit new workflows to the CMS project since yesterday, and the job queues have now drained.
The cause is a change introduced in the development of the CMS work-flow management system. These changes are tested first on a development system before being moved to the production system. We currently use the development system to run CMS@Home, so the change is impacting us.
I'm trying to find out when a fix will be forthcoming, but until then set No New Tasks for CMS or switch to another project.
I'm sorry about this. I will let you know when I am able to submit jobs again.
9 Dec 2021, 15:15:02 UTC · Discuss

Power Outage
There is currently a power outage in the CERN computer centre. LHC@home services may be affected.
26 Aug 2021, 15:11:40 UTC · Discuss

CMS App Downtime
Due to an issue with the authentication service used by the CMS App, the job queue has been paused. New jobs will be sent again once the issue has been resolved.
26 Aug 2021, 12:20:40 UTC · Discuss

CMS job queue to drain this weekend (21/08/2021)
Oops, I posted this twice to the -dev board, not once there and again here -- sorry!

CMS is about to release a new version of WMAgent based entirely on python 3. They have asked that they be able to update our agent by Monday evening (23/08), so I will not inject any new workflows before the upgrade. I expect the job queue to drain by late on Sunday.
Please set your CMS application to no new tasks by then.

21 Aug 2021, 0:10:34 UTC · Discuss

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