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Previous tests have shown that Enpirion EN5360, a 6 amp device is capable of taking sLHC radiation dosage but the input voltage is limited to a maximum of 5.5V. But from a systems point of view it is essential to have a factor of 10 in input/out voltage ratio in single stage i.e. maximum input voltage be >12 Volts. The silicon foundry that made this device can now make 12 V FETS on the same 0.25 µm process with good irradiation results that are reported. Plug in power cards with x10 voltage ratio are being developed for testing the hybrids with ABCN chips, these have air coils but using commercial chips that may not be radiation hard but help in system noise and performance testing.

The ATLAS trigger system is responsible for selecting the interesting collision events delivered by the Large Hadron Collider (LHC). The ATLAS trigger will need to achieve a ~10-7 rejection factor against random proton-proton collisions, and still be able to efficiently select interesting events. After a first processing level based on hardware, the final event selection is based on custom software running on two CPU farms, containing around two thousand multi-core machines. This is known as the high-level trigger. Running the trigger online during long periods demands very high quality software. It must be fast, performant, and essentially bug-free. With more than 100 contributors and around 250 different packages, a thorough validation of the HLT software is essential. This relies on a variety of unit and integration tests as well as on software metrics, and uses both in-house and open source software. This paper describes the existing infrastructure used for validating the high-level trigger software, as well as plans for its future development.

The ATLAS trigger system is responsible for selecting the interesting collision events delivered by the Large Hadron Collider(LHC). The ATLAS trigger will need to achieve a ~10‐7 rejection factor against random proton‐proton collisions, and still be able to efficiently select interesting events. After a first processing level based on FPGAs and ASICS, the final event selection is based on custom software running on two CPU farms, containing around two thousand multi‐core machines. This is known as the high‐level trigger(HLT). With more than 100 contributors and around 250 different packages, a thorough validation of the HLT software is essential. This paper describes the existing infrastructure used for validating the HLT software, as well as future plans.

Our group is researching commercial power converters having voltage ratios greater than ten that are capable of running in the ATLAS Silicon Tracker high luminosity upgrade environment. The devices therefore must operate in a high magnetic field (2 T) and be radiation hard to ~50-100 MRad and ~ 1015 neq/cm2. These converters are to be mounted on the same multi-chip modules as the ASIC readout chips or in close vicinity without introducing any additional readout noise due to the MHz switching frequencies. Such devices will permit higher voltage power delivery to the tracker and thus increase overall power efficiency by limiting the ohmic losses in the ~100 meters of cable between the tracker and the power sources.