Irradiation tests and expected performance of readout electronics of the ATLAS Hadronic Endcap calorimeter for the HL-LHC

Abstract

The readout electronics of the ATLAS Hadronic Endcap Calorimeter will have to withstand an about 3–5 times higher radiation doses at the future high-luminosity LHC compared to the LHC design values. The radiation damages of the front-end electronics made in GaAs technology could significantly affect the hadronic endcap calorimeter performance. Recent measurements of characteristics of neutron and proton irradiated ASICs at room and liquid argon temperatures are reported, which allow an improved assessment of the expected degradation in high-luminosity LHC conditions. The results of these measurements are furthermore applied to simulations of the calorimeter performance. Results from replacement technologies, like Si CMOS, are also presented.

Developments on DC/DC converters for the LHC experiment upgrades

“…The increase of the radiation background [1][2][3][4] and the requirements of new front-end electronics that will characterize the HL-LHC upgrades [5][6][7][8] are not compatible with the current capability of the power supply systems in use. They will have to face a highly hostile environment, basically from the background of both charged and neutral particles, of the order of five times higher than the LHC nominal one.…”

Multi-gigabit low-power radiation-tolerant data links and improved data motion in trackers

“…While there are two linking technologies shown here, there are common design considerations used to provide radiation hardness without expending too much energy. The radiation hardness of deep sub-micron technologies to lifetime damage has been studied extensively [1,2,4,6] and thus radiation hardened design in these processes focuses on single event effects. Single event effects can be corrected using error correction methods, but the rapid cycle time of high-speed linking technology sets bounds on what methods of error detection and prevention are appropriate for use.…”

Testing FLUKA on neutron activation of Si and Ge at nuclear research reactor using gamma spectroscopy

“…are several studies on neutron irradiation of silicon [1][2][3][4] and germanium [5][6][7] detectors.…”

“…This irradiation method is also used to reproduce radiation damage of active sensors in the context of LHC experiments, among other aims. For instance, there are several studies on neutron irradiation of silicon [1][2][3][4] and germanium [5][6][7] detectors.…”