Collaboration efforts of the JINR TRT group, Russian institutions and the international scientific organizations in constructing the ATLAS Inner Detector TRT for LHC is summarized. R&D and TRT ...construction were accomplished during 1994–2007 at the Laboratory of Particle Physics of the Joint Institute for Nuclear Research (LPP JINR) and CERN.
First results from the analysis of proton-proton collisions recorded with the ATLAS detector at the LHC are presented. The data sets analyzed were collected at centre-of-mass energies of 900 GeV and ...7 TeV using a minimum-bias trigger, and correspond to varying integrated luminosities up to
∼
9
μb
−
1
and
∼
8
nb
−
1
, respectively.
Aging studies for the ATLAS Transition Radiation Tracker (TRT) Akesson, T.; Barberio, E.; Bondarenko, V. ...
International Workshop on Aging Phenomena in Gaseous Detectors,Hamburg, Germany,2001-10-02 - 2001-10-05,
12/2003, Letnik:
515, Številka:
1
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
A summary of the aging and material validation studies carried out for the ATLAS Transition Radiation Tracker (TRT) is presented. Particular emphasis is put on the different phenomena observed in ...straw tubes operating with the chosen Xe/CF
4/CO
2 mixture. The most serious effects observed are silicon deposition on the anode wire and damage of the anode wire gold plating. Etching phenomena and active radical effects are also discussed. With a careful choice of all materials and components, and with good control of the water contamination in the active gas, the ATLAS TRT will operate reliably for 10 years at the LHC design luminosity. To demonstrate this fully, more work is still needed on the gas system purification elements, in particular to understand their interplay with the active species containing fluorine created in the avalanche process under irradiation.
The basic drift-time measurement properties of the proportional tubes (straws) of the ATLAS TRT detector and the impact of the parameters of the front-end electronics on performance are discussed. ...The performance of two different front-end electronics prototypes has been studied in detail at very high counting rate and is reported here.
This paper reports on the charged pion production yields measured by the SPY/NA56 experiment for 450 GeV/c proton interactions on beryllium targets. The present data cover a secondary momentum range ...from 7 GeV/c to 135 GeV/c in the forward direction. An experimental accuracy ranging from 5 to 10%, depending on the beam momentum, has been achieved, limited mainly by the knowledge of the beam acceptance. These results will be relevant in the calculation of neutrino fluxes in present and future neutrino beams.
The ATLAS Transition Radiation Tracker (TRT) performance depends critically on the choice of the active gas and on its properties. The most important operational aspects, which have led to the final ...choice of the active gas for the operation of the TRT at the LHC design luminosity, are presented. The TRT performance expected at these conditions is reviewed, including pile-up effects at high luminosity.
Test-beam studies of the ATLAS Transition Radiation Tracker (TRT) straw tube performance in terms of electron–pion separation using a time-over-threshold method are described. The test-beam data are ...compared with Monte Carlo simulations of charged particles passing through the straw tubes of the TRT. For energies below
10
GeV
, the time-over-threshold method combined with the standard transition-radiation cluster-counting technique significantly improves the electron–pion separation in the TRT. The use of the time-over-threshold information also provides some kaon–pion separation, thereby significantly enhancing the B-physics capabilities of the ATLAS detector.
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