Speaker
Dr
Hubert Kroha
(Max-Planck-Institut fuer Physik, Munich)
Description
For the planned high-luminosity upgrades of the Large Hadron Collider (LHC)
background rates of neutrons and gamma rays of up to 14 kHz/cm$^2$ are expected which
exceed the rate capability of the current ATLAS precision muon tracking detectors,
the Monitored Drift Tube (MDT) chambers, with a drift tube diameter of 30 mm.
So called sMDT chambers with a drift tube diameter of 15 mm have been developed
for upgrades of the ATLAS muon spectrometer. A full sMDT prototype chamber has been
constructed and tested in a muon beam at CERN and with cosmic muons at high gamma
irradiation rates of up to 23 kHz/cm$^2$. The chamber design and construction procedures
will be discussed. The test results demonstrate the required
track reconstruction efficiency and spatial resolution of the sMDT chambers
at background rates well beyond the maximum expected value. The sense wire locations
in the prototype chamber have been measured with few micron precision with cosmic rays
using precise reference chambers and confirm a wire positioning accuracy of better
than the 20 microns required.
Primary author
Dr
Hubert Kroha
(Max-Planck-Institut fuer Physik, Munich)
Co-authors
Dr
Albert Engl
(Ludwig-Maximilians University, Munich)
Mr
Alessandro Manfredini
(Max-Planck-Institut fuer Physik, Munich)
Dr
Andre Zibell
(Ludwig-Maximilians University, Munich)
Mr
Bernhard Bittner
(Max-Planck-Institut fuer Physik, Munich)
Mr
Daniele Zanzi
(Max-Planck-Institut fuer Physik, Munich)
Dr
Joerg Dubbert
(Max-Planck-Institut fuer Physik, Munich)
Dr
Oliver Kortner
(Max-Planck-Institut fuer Physik, Munich)
Prof.
Otmar Biebel
(Ludwig-Maximilians University, Munich)
Mr
Philipp Schwegler
(Max-Planck-Institut fuer Physik, Munich)
Dr
Ralf Hertenberger
(Ludwig-Maximilians University, Munich)
Dr
Robert Richter
(Max-Planck-Institut fuer Physik, Munich)
Mr
Sebastian Ott
(Max-Planck-Institut fuer Physik, Munich)
