DiRAC is recognised as the primary provider of HPC resources to the STFC Particle Physics, astroparticle physics, Astrophysics, cosmology, solar system & Planetary Science and Nuclear physics (PPAN: STFC Frontier Science) theory community.  It provides the modelling, simulation, data analysis and data storage capability that underpins the STFC Science Challenges and our researcher’s world-leading science outcomes.

On this page you can find information on:

DiRAC Projects:

Accessing DiRAC:

Acknowledge DiRAC:

Each year we publish a selection of Science Highlights and a full list of publications from all our projects.

If you cant find what you need on these pages, please email the Project Office


DiRAC Projects

DiRAC serves over 35 projects, with more than 400 active users. Our community is diverse and encompasses Particle Physics, Astrophysics, cosmology, Nuclear Physics. Together their research addresses all the STFC Science Challenges.


Open Projects

A list of our Open projects, their Principal Investigator, and Project Start and End Dates can be found on our Open Projects page.

Closed Projects

We also maintain a list of our closed projects on the Closed Projects page.


Project Allocations

After each  Call has been concluded, we publish the compute time allocated to each project, in terms of CPU-Mhours on the DiRAC service on which their calculations are to be run, as well as the Storage Space w[TB] allocated. In DiRAC we have three compute services and due to the different architectures on each service, the CPU-Mhours awarded to each project may not be directly comparable.


User Accounts

Projects and accounts on DiRAC resources are administered through the DiRAC SAFE. SAFE stands for Service Administration From EPCC. It is a large web-based application, provided by EPCC for DiRAC. The same software is used by the Archer UK national supercomputing service and for other facilities at EPCC.

Every DiRAC user has an account on SAFE. You can use your SAFE account to check your use of CPU time and disk space now and in the past, to apply to join other projects and create service machine accounts, to change passwords, to keep your personal details up to date, to check the progress of the helpdesk queries you have submitted, and so on. PIs and project managers can do many other things. such as viewing usage by each member of their project team.

The DiRAC team also uses SAFE to administer the system and to generate reports. The helpdesk software is also part of SAFE. If you are a PI or project manager you can manage your project via SAFE.

You can find all the information you need on SAFE here. For any other information please email DiRAC Support.


Accessing DiRAC

STFC Resource Allocation Committee (RAC)

The Resource Allocation Committee (RAC) is responsible for overseeing the allocation process for all on DiRAC Resources, including compute time, storage and Research Engineering effort


Call for Proposals

The RAC makes an annual Call for Proposals to request time on our Resources. The next Call (11th) will open at the beginning of June 2018 and close on the 1st October 2018.

Current Call

The current Call (10th) opened on 6th October 2017 and closed on 14th November 2017. The resulting allocations began on 1st May 2018 and are available on our Project Allocations page.

Application documentation from the 10th Call, including Guidance Notes can be found here.


Acknowledge DiRAC

If you have used the DiRAC Resources prior to 30th April 2018 for your publication, please use the statements found here in your acknowledgement section – depending on the machine you used.

The acknowledgements for our new Resources, which have been available since 1st May 2018 are in the process of being renewed and will be posted here at the beginning of June – please check back then.