The High Performance Computing (HPC) application code HELIUM, developed at Queen's University Belfast to assist the development of attosecond technology, has impacted on the provision of public services through guiding procurement and acceptance testing of the high-performance computer facility HECToR. This facility was funded by UK Government with a total expenditure of £113M during 2007 – 2013. The HELIUM code was used for procurement and
acceptance testing for the initial HECToR service in 2007 (Phase 1, 11k cores), and its upgrades in 2009 (Phase 2a, 22k cores), 2010 (Phase 2b, 44k cores) and 2011 (Phase 3, 90k cores). The HELIUM code was particularly invaluable in demonstrating that the Phase 2b and Phase 3 systems perform correctly at pre-agreed performance levels, since this code can be adapted to run for several hours over >80k cores.