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The ALICE experiment will run with continuous readout at interaction rates of up to 50 kHz in Pb-Pb collisions during Run 3 of the LHC. In order to achieve this goal, a new data processing scheme and software are developed. This scheme…

Instrumentation and Detectors · Physics 2021-10-18 Ernst Hellbär

We present a Bayesian approach to particle identification (PID) within the ALICE experiment. The aim is to more effectively combine the particle identification capabilities of its various detectors. After a brief explanation of the adopted…

Data Analysis, Statistics and Probability · Physics 2016-05-30 ALICE Collaboration

In this paper lossless and a quasi lossless algorithms for the online compression of the data generated by the Time Projection Chamber (TPC) detector of the ALICE experiment at CERN are described. The first algorithm is based on a lossless…

Data Analysis, Statistics and Probability · Physics 2007-05-23 M. Ivanov , A. Nicolaucig , A. Krechtchouk

The ALICE High Level Trigger has to process data online, in order to select interesting (sub)events, or to compress data efficiently by modeling techniques. Focusing on the main data source, the Time Projection Chamber (TPC), we present two…

Instrumentation and Detectors · Physics 2015-06-26 V. Lindenstruth , C. Loizides , D. Roehrich , B. Skaali , T. Steinbeck , R. Stock , H. Tilsner , K. Ullaland , A. Vestbo , T. Vik

ALICE is the dedicated heavy ion experiment at the LHC at CERN and records lead-lead collisions at a rate of up to 50 kHz in LHC Run 3. To cope with such collision and data rates, ALICE uses a new GEM TPC with continuous readout and a…

Instrumentation and Detectors · Physics 2026-01-29 David Rohr

In LHC Run 3, ALICE will increase the data taking rate significantly to 50 kHz continuous read-out of minimum bias Pb-Pb collisions. The reconstruction strategy of the online-offline computing upgrade foresees a first synchronous online…

Instrumentation and Detectors · Physics 2019-10-02 David Rohr , Sergey Gorbunov , Marten Ole Schmidt , Ruben Shahoyan

The ALICE TPC provides excellent charged particle tracking for the study of pp and Pb-Pb collisions at LHC. The TPC also allows particle identification via the measurement of the specific ionisation dE/dx. At high pT (pT > 3 GeV/c) this is…

High Energy Physics - Experiment · Physics 2019-08-13 L. Bryngemark

For the International Large Detector (ILD) at the planned International Linear Collider (ILC) a Time Projection Chamber (TPC) is foreseen as the main tracking detector. To achieve the required point resolution, Micro Pattern Gaseous…

Instrumentation and Detectors · Physics 2019-02-15 Uli Einhaus , Uwe Krämer , Paul Malek

The ALICE (A Large Ion Collider Experiment) experiment at the Large Hadron Collider (LHC) at CERN is dedicated to heavy ion physics to explore the structure of strongly interacting matter. The Time Projection Chamber (TPC) of ALICE is a…

Instrumentation and Detectors · Physics 2018-03-14 Erik Brücken , Timo Hildén

ALICE is the LHC experiment dedicated to the study of Heavy-Ion collisions. Many observables related to the properties of the medium created in such collisions rely on the excellent capabilities of the detector in terms of Particle…

High Energy Physics - Experiment · Physics 2017-09-03 Chiara Zampolli

A large Time Projection Chamber (TPC) is the main device for tracking and charged-particle identification in the ALICE experiment at the CERN LHC. After the second long shutdown in 2019-2020, the LHC will deliver Pb beams colliding at an…

Instrumentation and Detectors · Physics 2019-09-04 P. Gasik

The main focus of the ALICE experiment, quark--gluon plasma measurements, requires accurate particle identification (PID). The ALICE subdetectors allow identifying particles over a broad momentum interval ranging from about 100 MeV/c up to…

High Energy Physics - Experiment · Physics 2023-09-15 Maja Karwowska , Monika Jakubowska , Łukasz Graczykowski , Kamil Deja , Miłosz Kasak

Using a test TPC, consisting of the ALICE TPC field cage prototype in combination with the final ALICE TPC readout and electronics, the energy loss distribution and resolution were measured for identified protons. The measurements were…

Instrumentation and Detectors · Physics 2019-08-14 P. Christiansen

The temporal signals from a large gas detector may show dynamical scaling due to many correlated space points created by the charged particles while passing through the tracking medium. This has been demonstrated through simulation using…

Computational Physics · Physics 2015-06-26 A. K. Mohanty , D. Favretto , F. Carminati , K. Safarik

Clustering multi-dimensional points is a fundamental task in many fields, and density-based clustering supports many applications as it can discover clusters of arbitrary shapes. This paper addresses the problem of Density-Peaks Clustering…

Databases · Computer Science 2022-12-01 Daichi Amagata , Takahiro Hara

Particle identification (PID) capabilities are studied by using the Time Projection Chamber (TPC) and a Time-Of-Flight (TOF) detector together at STAR. The identification capability of charged hadrons is greatly extended compared with that…

Nuclear Experiment · Physics 2011-07-19 M. Shao , O. Barannikova , X. Dong , Y. Fisyak , L. Ruan , P. Sorensen , Z. Xu

Particle identification is an important feature of the ALICE detector at the LHC. In particular, for particle identification via the time-of-flight technique, the precise determination of the event collision time represents an important…

Instrumentation and Detectors · Physics 2017-04-04 ALICE Collaboration

We propose a novel fast track finding system capable of reconstructing four dimensional particle trajectories in real time using precise space and time information of the hits. Recent developments in silicon pixel detectors achieved 150 ps…

Instrumentation and Detectors · Physics 2015-12-31 Nicola Neri , Marco Petruzzo

With the emergence of advanced Silicon (Si) sensor technologies such as LGADs, it is now possible to achieve exceptional time measurement precision below 50 ps. As a result, the implementation of time-of-flight (TOF) particle identification…

High Energy Physics - Experiment · Physics 2023-11-09 Bohdan Dudar , Ulrich Einhaus , Jenny List , Konrad Helms , Frank Gaede

The ALICE experiment features multiple particle identification systems. The measurement of the identified charged hadron $p_{t}$ spectra in proton-proton collisions at $\sqrt{s}=900$ GeV will be discussed. In the central rapidity region…

High Energy Physics - Experiment · Physics 2019-08-14 L. Milano