7 Particle Detectors and Detector Systems
329
0
10 –5
10 –4
10 –3
10 –2
10 –1
1 ALICE Pb–p √s NN = 5.02 TeV
2
4
6
8
6 TRD layers
Minimum bias
trg
offline matching
TRD e trigger: p T > 3 GeV/c
10
p T (GeV/c)
1/N
evt dN/dp
T
(c/GeV)
Fig. 7.39 p T spectra of identified electrons for the minimum-bias and TRD-triggered data sample
of Pb-p collisions at
√
s NN = 5.02 TeV. For the result of the TRD-triggered sample, electrons
from photon conversions in the detector material were rejected by matching the online track with
a track in the TPC. Reference [111]
about 70 is achieved at a momentum of 1 GeV/c for simple identification algorithms.
When using the temporal evolution of the signal, a pion rejection factor of up to 410
is obtained.
References
1. B. Dolgoshein, Complementary particle ID: transition radiation and dE/dx relativistic rise,
Nucl. Instrum. Methods Phys. Res., A: 433 (1999) 533
2. C. Ward et al., A Large Aperture Time-Of-Flight Counter System, Nucl. Instr. and Meth.
30(1964)61–68
3. G. Charpak, L. Dick and L. Feuvrais, Location of the position of a particle trajectory in a
scintillator, Nucl. Instr. and Meth. 15(1962)323–326
4. W. Klempt, Review of particle identification by time of flight techniques, Nucl. Instrum.
Methods Phys. Res., A: 433 (1999) 542
5. A. Rabl and R. Winston, Ideal concentrators for finite sources and restricted exit angles,
Applied Optics, Vol. 15 Issue 11, pp.2880–2883 (1976)
R.H. Hildebrand and R. Winston, Throughput of diffraction-limited field optics systems for
infrared and millimetric telescopes: erratum, Applied Optics, Vol. 21 Issue 17, pp.3065–3065
(1982)
6. W. Blaschke and G. Thomsen, Vorlesungen Uber Differential-Geometrie und Geometrische
Grundlagen von Einsteins Relativitatstheorie. I: Elementaire Differentialgeometrie, Dritte
Erweiterte Auflage. Bearbeitet under herausgegeben, DOVER PUBLICATIONS (1945)
7. T. Kobayashi and T. Sugitate, Test of Prototypes for a Highly Segmented TOF Hodoscope,
Nucl. Instrum. Methods Phys. Res., A: 287 (1990) 389–396
8. C. Field et al., Development of photon detectors for a fast focusing DIRC, Nucl. Instrum.
Methods Phys. Res., A 553 (2005) 96–106
329
0
10 –5
10 –4
10 –3
10 –2
10 –1
1 ALICE Pb–p √s NN = 5.02 TeV
2
4
6
8
6 TRD layers
Minimum bias
trg
offline matching
TRD e trigger: p T > 3 GeV/c
10
p T (GeV/c)
1/N
evt dN/dp
T
(c/GeV)
Fig. 7.39 p T spectra of identified electrons for the minimum-bias and TRD-triggered data sample
of Pb-p collisions at
√
s NN = 5.02 TeV. For the result of the TRD-triggered sample, electrons
from photon conversions in the detector material were rejected by matching the online track with
a track in the TPC. Reference [111]
about 70 is achieved at a momentum of 1 GeV/c for simple identification algorithms.
When using the temporal evolution of the signal, a pion rejection factor of up to 410
is obtained.
References
1. B. Dolgoshein, Complementary particle ID: transition radiation and dE/dx relativistic rise,
Nucl. Instrum. Methods Phys. Res., A: 433 (1999) 533
2. C. Ward et al., A Large Aperture Time-Of-Flight Counter System, Nucl. Instr. and Meth.
30(1964)61–68
3. G. Charpak, L. Dick and L. Feuvrais, Location of the position of a particle trajectory in a
scintillator, Nucl. Instr. and Meth. 15(1962)323–326
4. W. Klempt, Review of particle identification by time of flight techniques, Nucl. Instrum.
Methods Phys. Res., A: 433 (1999) 542
5. A. Rabl and R. Winston, Ideal concentrators for finite sources and restricted exit angles,
Applied Optics, Vol. 15 Issue 11, pp.2880–2883 (1976)
R.H. Hildebrand and R. Winston, Throughput of diffraction-limited field optics systems for
infrared and millimetric telescopes: erratum, Applied Optics, Vol. 21 Issue 17, pp.3065–3065
(1982)
6. W. Blaschke and G. Thomsen, Vorlesungen Uber Differential-Geometrie und Geometrische
Grundlagen von Einsteins Relativitatstheorie. I: Elementaire Differentialgeometrie, Dritte
Erweiterte Auflage. Bearbeitet under herausgegeben, DOVER PUBLICATIONS (1945)
7. T. Kobayashi and T. Sugitate, Test of Prototypes for a Highly Segmented TOF Hodoscope,
Nucl. Instrum. Methods Phys. Res., A: 287 (1990) 389–396
8. C. Field et al., Development of photon detectors for a fast focusing DIRC, Nucl. Instrum.
Methods Phys. Res., A 553 (2005) 96–106