III. The Muon spectrometer The Muon spectrometer surrounds the calorimeters and operates within a
magnetic field generated by eight toroidal magnets. The Muon spectrometer
measures the tracks of muons as they are bent by this magnetic field. The
spectrometer consists of Monitored Drift Tubes (MDTs), Resistive Plate
Chambers (RPCs), Thin Gap Chambers (TGCs) and Cathode Strip Chambers
(CSCs). The TGCs and RPCs provide precision triggers for muons at the detector
ends and centre respectively. The MDT’s are 0.85-6.5 meters long, with a
diameter of 3 cm and are filled with gas. As a muon passes through the tubes, it
interacts with the gas and leaves a trail of electrons and ions behind. These then
drift to the sides and centre of the tube, and the time it takes to drift is measured.
By correlating the drift time between several tubes, the position of the muon as
it passes through the detector can be determined.
65
Appendix B Table B-1 summarising the proton irradiation conditions for EJ200, EJ208 and EJ260 samples. Sample Thickness (um) Average beam current (nA) Irradiation time (min:sec) E_loss per proton (J) Integrated charge (C) Absorbed dose (Gy) Dose Error (Gy) Estimated average dose rate (Gy/s) EJ 200 14 385 0,425 12:00 5,78E-13 310,3 8,78E+05 2,91E+04
