Chapter 10 - Muon Detectors

The complete Chapter 10 document is available here.

Figures

• Figure 10.1 - Location of the muon upgrade components in azimuth $\phi$ and pseudorapidity $\eta$ for Run I. The gray cross-hatched region indicates the currently uninstrumented regions of CMP and CMX.

• Figure 10.2 - Number of absorption lengths as a function of pseudorapidity averaged over azimuthal acceptance of the CMU, CMP and CMX systems.

• Figure 10.3 - Location of the central muon upgrade components in azimuth $\phi$ and pseudorapidity $\eta$ for Run II.

• Figure 10.4 - Configuration of the Central Muon Upgrade detector (CMP), Upgrade Scintillator (CSP) and steel absorber in Run II. On the walls the circles are the ends of PMTs. On the top and bottom the trapezoids are the lightguides viewed end-on.

• Figure 10.5 - Detail showing the configuration of steel, chambers and counters for the Central Muon Upgrade walls. A muon track is drawn to establish the interaction point. Counter readout is located at $z$=0. Counters layers are offset from the chambers and from each other in $x$ to allow overlapping light guides and PMTs, minimizing the space required.

• Figure 10.6 - Side view showing the placement of chambers to complete the CMX coverage. Note the lower CMX detectors are supported on the floor and sub-floor. The IMU barrel chambers and scintillation counters, the toroid counters and the endwall counters are also shown.

• Figure 10.7 - Lower chambers for the Central Muon Extension and Scintillators.

• Figure 10.8 - Hybrid pre-amp circuit for the Run II Central Muon detector readout.

• Figure 10.9 - ASD/ToT circuit for the Run II Central Muon detector readout.

• Figure 10.10 - The amount of steel absorber (measured in interaction lengths) between the IMU Barrel and the interaction point, as a function of pseudo-rapidity.

• Figure 10.11 - A detailed section of the IMU Barrel, showing several chamber cells and corresponding scintillator.

• Figure 10.12 - Elevation view of the IMU Barrel, viewed along the beam axis. The IMU chambers and scintillators are represented by the outer circle around the toroids. Toroid coils (not shown) may interfere with IMU installation at $\pm 45^{\circ}$ and $\pm 135^{\circ}$. The CMX lower $90^{\circ}$ section is also shown.

• Figure 10.13 - The geometry of the endwall muon counters. The small gaps every $15^{\circ}$ correspond to the wedge boundaries on the endwall. The toroid counters are similar, except that the gaps are absent.

• Figure 10.14 - Resolution for matching between muon stubs and extrapolated tracks measured with high $p_T$ muons from $W$ and $Z$ decays.

• Figure 10.15 - Reconstructed $J/\psi$ mass for various detector decay topologies.

• Figure 10.16 - Probability of a stub from an underlying minimum bias event overlapping with a stub of interest in a physics event.