The muon system of the Run II DØdetector

Abstract

We describe the design, construction and performance of the upgraded DØ muon system for Run II of the Fermilab Tevatron collider. Significant improvements have been made to the major subsystems of the DØ muon detector: trigger scintillation counters, tracking detectors, and electronics. The Run II central muon detector has a new scintillation counter system inside the iron toroid and an improved scintillation counter system outside the iron toroid. In the forward region, new scintillation counter and tracking systems have been installed. Extensive shielding has been added in the forward region. A large fraction of the muon system electronics is also new.

Precise measurement of the top-quark mass fromlepton+jetsevents at D0

“…A muon system [18] is located beyond the calorimetry, and consists of a layer of tracking detectors and scintillation trigger counters before 1.9 T toroids, followed by two similar layers after the toroids. Tracking for |η| < 1 relies on 10 cm wide drift tubes, while 1 cm mini-drift tubes are used for 1 < |η| < 2.…”

Search for Heavy Resonances in the Dimuon Channel with the DØ Detector

“…A dedicated muon system is used, therefore, to identify muons, provide approximate locations, momenta, and charges of these muons, and allow for fast triggers based on the presence of high energy muons likely to have come from the interaction region. The muon system [69] is placed outside the calorimeter because all particles predicted by the standard model other than muons (except neutrinos) are typically absorbed in the D∅ calorimeter. Muons with energies up to a few hundred GeV interact primarily through ionization rather than bremsstrahlung.…”

“…Figure 3.10 shows the energy loss for muons (in copper). A muon needs about 1.6 GeV of energy to exit the calorimeter [69]. The muon system was designed to detect the energy loss of muons as they pass through the detector.…”

Measurement of theϕη*distribution of muon pairs with masses between 30 and 500 GeV in10.4 fb−1Abazov1, Abbott2, Acharya3 et al. 2015Phys. Rev. DSelf Cite11060View full textAdd to dashboardCite

“…A liquid-argon and uranium calorimeter has a central section covering |η| < 1.1, and two end calorimeters that extend coverage to |η| ≈ 4.2, with all three housed in separate cryostats [16]. An outer muon system, at |η| < 2, consists of a layer of tracking detectors and scintillation trigger counters in front of 1.8 T iron toroidal magnets, followed by two similar layers after the toroids [17].…”