Beamtest of nonirradiated and irradiated ATLAS SCT microstrip modules at KEK

Unno, Y.; Matuo, Tatuya; Hashizaki, T.; Akimoto, Tetsuo; Bernabéu, J.; Doležal, Z.; Eklund, L.; Hara, K.; Ikegami, Y.; Iwata, Y.; Kato, Yuta; Ketterer, C.; Kobayashi, Hisao; Kohriki, T.; Kondo, T.; Koshino, T; Ludwig, J.; Masuda, Takatsugu; Moorhead, G. F.; Nakano, I.; Norimatsu, Kenji; Ohsugi, T.; Runge, K.; Shinma, S.; Takashima, R.; Tanaka, R.; Tanimoto, N.; Terada, S.; Ujiie, N.; Vos, M.; Yamanaka, Kenichi; Yamashita, T.

doi:10.1109/tns.2002.801505

“…Whenever the corresponding calibration runs are performed, the mean values of the response-curve ENC or NO at 1 fC for each chip are saved for later analyses. These two noise estimates correlate fairly well chip-by-chip, but ENC values deduced from noise occupancies are sytematically smaller by about 5% [42]. Below, unless specified, 'noise' refers to the ENC value from the response-curve width, and is measured for modules with bias voltage at the normal operating value of 150 V.…”

Section: Noisementioning

confidence: 80%

Operation and performance of the ATLAS semiconductor tracker

Barlow¹

2014

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The semiconductor tracker is a silicon microstrip detector forming part of the inner tracking system of the ATLAS experiment at the LHC. The operation and performance of the semiconductor tracker during the first years of LHC running are described. More than 99% of the detector modules were operational during this period, with an average intrinsic hit efficiency of (99.74±0.04)%. The evolution of the noise occupancy is discussed, and measurements of the Lorentz angle, δ -ray production and energy loss presented. The alignment of the detector is found to be stable at the few-micron level over long periods of time. Radiation damage measurements, which include the evolution of detector leakage currents, are found to be consistent with predictions and are used in the verification of radiation background simulations. KEYWORDS: Solid state detectors; Charge transport and multiplication in solid media; Particle tracking detectors (Solid-state detectors); Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc

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“…An estimated fluence at the innermost part of the SCT is ∼ 2 × 10 14 1-MeV-neutrons/cm 2 (or equivalently ∼ 3 × 10 14 24-GeVprotons/cm 2 ) in ten years of operation. The SCT has been designed to be able to withstand these fluences [8] and its performance has been extensively studied in beam tests using irradiated SCT modules [9].…”

Section: Introductionmentioning

confidence: 99%

Production performance of the ATLAS semiconductor tracker readout system

Mitsou

¹

2006

IEEE Trans. Nucl. Sci.

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Abstract-The ATLAS Semiconductor Tracker (SCT) together with the pixel and the transition radiation detectors will form the tracking system of the ATLAS experiment at LHC. It will consist of 20 000 single-sided silicon microstrip sensors assembled back-to-back into modules mounted on four concentric barrels and two end-cap detectors formed by nine disks each. The SCT module production and testing has finished while the macroassembly is well under way. After an overview of the layout and the operating environment of the SCT, a description of the readout electronics design and operation requirements will be given. The quality control procedure and the DAQ software for assuring the electrical functionality of hybrids and modules will be discussed. The focus will be on the electrical performance results obtained during the assembly and testing of the end-cap SCT modules.

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“…Whenever the corresponding calibration runs are performed, the mean values of the response-curve ENC or NO at 1 fC for each chip are saved for later analyses. These two noise estimates correlate fairly well chip-by-chip, but ENC values deduced from noise occupancies are sytematically smaller by about 5% [42]. Below, unless specified, 'noise' refers to the ENC value from the response-curve width, and is measured for modules with bias voltage at the normal operating value of 150 V. Figure 13 shows the distributions of chip-averaged response-curve ENC values and noise occupancies at 1 fC as of October 2010 and December 2012 for different module types.…”

Section: Noisementioning

confidence: 61%

Operation and performance of the ATLAS Semiconductor Tracker

Barlow

¹

2013

2013 3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and Their Applications (ANIMM

0

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The semiconductor tracker is a silicon microstrip detector forming part of the inner tracking system of the ATLAS experiment at the LHC. The operation and performance of the semiconductor tracker during the first years of LHC running are described. More than 99% of the detector modules were operational during this period, with an average intrinsic hit efficiency of (99.74±0.04)%. The evolution of the noise occupancy is discussed, and measurements of the Lorentz angle, δ -ray production and energy loss presented. The alignment of the detector is found to be stable at the few-micron level over long periods of time. Radiation damage measurements, which include the evolution of detector leakage currents, are found to be consistent with predictions and are used in the verification of radiation background simulations. A Estimation of the bulk leakage current using models 52The ATLAS collaboration 57 IntroductionThe ATLAS detector [1] is a multi-purpose apparatus designed to study a wide range of physics processes at the Large Hadron Collider (LHC) [2] at CERN. In addition to measurements of Standard Model processes such as vector-boson and top-quark production, the properties of the newly discovered Higgs boson [3,4] are being investigated and searches are being carried out for as yet undiscovered particles such as those predicted by theories including supersymmetry. All of these studies rely heavily on the excellent performance of the ATLAS inner detector tracking system. The semiconductor tracker (SCT) is a precision silicon microstrip detector which forms an integral part of this tracking system. The ATLAS detector is divided into three main components. A high-precision toroid-field muon spectrometer surrounds electromagnetic and hadronic calorimeters, which in turn surround the inner detector. This comprises three complementary subdetectors: a silicon pixel detector covering radial distances 1 between 50.5 mm and 150 mm, the SCT covering radial distances from 299 mm to 560 mm and a transition radiation tracker (TRT) covering radial distances from 563 mm to 1066 mm. These detectors are surrounded by a superconducting solenoid providing a 2 T axial magnetic field. The layout of the inner detector, showing the SCT together with the pixel detector and transition radiation tracker, is shown in figure 1. The inner detector measures the trajectories of charged particles within the pseudorapidity range |η| < 2.5. It has been designed to provide a transverse momentum resolution, in the plane perpendicular to the beam axis, of 1 ATLAS uses a right-handed coordinate system with its origin at the nominal interaction point in the centre of the detector and the z-axis along the beam-pipe. The x-axis points from the interaction point to the centre of the LHC ring and the y-axis points upwards. Cylindrical coordinates (r, φ ) are used in the transverse plane, φ being the azimuthal angle around the beam-pipe. The pseudorapidity η is defined in terms of the polar angle θ as η = − ln tan(θ /2).-1 -

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Beamtest of nonirradiated and irradiated ATLAS SCT microstrip modules at KEK

Cited by 14 publications

References 8 publications

Operation and performance of the ATLAS semiconductor tracker

Operation and performance of the ATLAS semiconductor tracker

Production performance of the ATLAS semiconductor tracker readout system

Operation and performance of the ATLAS Semiconductor Tracker

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