Endcap muon tracking and triggering: 1.3 ≤ |η| ≤ 2.7. Replace for L = 5 × 10 34 cm −2 s −1. Power: at least 30 kA at 1.2 V −→ Point-of-Load conversion. Nominal architecture: buck converters feeding low-dropout regulators (LDOs) Need B-field, radiation tolerant power converters. ���������������� ������������������ Figure 1.2: A z-y view of 1/4 of the ATLAS detector. The blue boxes indicate the end-cap Monitored Drift Tube chambers (MDT) and the yellow box in the Small Wheel area the Cathode Strip Chambers (CSC). The green boxes are barrel MDT chambers. The trigger chambers, Resistive Plate chambers (RPC) and Thin Gap Chambers (TGC), are indicated by the outlined white and the magenta boxes. This is a cutout on the muon spectrometer at the large sectors, hence the names 'End-cap Inner Large' (EIL), 'End-cap Middle Large' (EML) and 'End-cap Outer Large' (EOL). The detector regions of the Small Wheel and Big Wheel are also outlined.