From e04054014006125723f785bca6f17ae687f0512d Mon Sep 17 00:00:00 2001 From: Lily Fregoso Date: Sat, 1 Nov 2025 03:14:37 +0000 Subject: [PATCH] Update 'The ALICE TPC, a Big 3-dimensional Tracking Device with Fast Readout for Ultra-Excessive Multiplicity Events' --- ...st-Readout-for-Ultra-Excessive-Multiplicity-Events.md | 9 +++++++++ 1 file changed, 9 insertions(+) create mode 100644 The-ALICE-TPC%2C-a-Big-3-dimensional-Tracking-Device-with-Fast-Readout-for-Ultra-Excessive-Multiplicity-Events.md diff --git a/The-ALICE-TPC%2C-a-Big-3-dimensional-Tracking-Device-with-Fast-Readout-for-Ultra-Excessive-Multiplicity-Events.md b/The-ALICE-TPC%2C-a-Big-3-dimensional-Tracking-Device-with-Fast-Readout-for-Ultra-Excessive-Multiplicity-Events.md new file mode 100644 index 0000000..ef9cf05 --- /dev/null +++ b/The-ALICE-TPC%2C-a-Big-3-dimensional-Tracking-Device-with-Fast-Readout-for-Ultra-Excessive-Multiplicity-Events.md @@ -0,0 +1,9 @@ +
The design, building, [itagpro device](https://sendamultisoluciones.com/2017/04/28/decentralization-of-it-spending-puts-data-at-risk/) and commissioning of the ALICE Time-Projection Chamber (TPC) is described. It is the primary system for pattern recognition, tracking, and identification of charged particles within the ALICE experiment at the CERN LHC. The TPC is cylindrical in form with a quantity close to ninety m 3 and is operated in a 0.5 T solenoidal magnetic discipline parallel to its axis. On this paper we describe intimately the design issues for this detector for operation within the excessive multiplicity atmosphere of central Pb-Pb collisions at LHC energy. The implementation of the ensuing necessities into hardware (discipline cage, read-out chambers, electronics), infrastructure (fuel and cooling system, laser-calibration system), and software led to many technical innovations that are described together with a presentation of all the most important components of the detector, as presently realized. We additionally report on the performance achieved after completion of the first spherical of stand-alone calibration runs and demonstrate results close to these specified within the TPC Technical Design Report.
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ALICE ‘central barrel’, for monitoring of charged particles and particle identification. The main goal of the ALICE experiment at the CERN Large Hadron Collider (LHC) is the investigation of Pb-Pb collisions at a heart-of-mass power of 5.5 TeV per nucleon pair. The ensuing detector [iTagPro shop](https://judeomedia.org/index.php/Section_%224.2.1._Tile_Smartphone_Application%22) selection was a big-quantity TPC with overall ‘conventional’ lay-out however with practically all other design parameters beyond the state-of-the-art. This manuscript describes in detail the resulting detector and outlines the path from design issues to building and commissioning. In define the ALICE TPC consists of a hollow cylinder whose axis is aligned with the beams from the LHC and is parallel to the ALICE detector’s solenoidal magnetic area. The detector is filled with a counting gas consisting of a Ne-CO2-N2 mixture at atmospheric pressure. Charged particles traversing the detector ionize the fuel. The ionization electrons drift, under the affect of the electric field, to the endplates of the cylinder, the place their arrival point in the cylinder plane is precisely measured.
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The ALICE set-up is shown in Fig. 1. The TPC surrounds the Inner Tracking System (ITS) which is optimized for the determination of the primary and secondary vertices and [iTagPro shop](http://kcinema.egong.net/bbs/board.php?bo_table=free&wr_id=1119750) precision monitoring of low-momentum particles. On the outside the Transition Radiation Detector (TRD) is designed for electron identification. The outermost Time-Of-Flight (TOF) array offers pion, kaon, and proton identification. As well as, there are three single-arm detectors: the Photon Spectrometer (PHOS), the Electro-Magnetic CALorimeter (EMCAL) and [iTagPro shop](https://inzicontrols.net/battery/bbs/board.php?bo_table=qa&wr_id=260964) an array of Rich counters optimized for prime-Momentum Particle IDentification (HMPID). L3 solenoidal magnet beforehand utilized by the L3 experiment. The stringent requirement on the TPC temperature stability and homogeneity necessitate an elaborate cooling approach. The strategy to stabilize the TPC temperature was validated experimentally in a small take a look at setup and is described in Refs. Basically, it was demonstrated that thermal neutrality of the FECs will be achieved by ‘undercooling’, i.e. the cooling water is injected into the FEC cooling loops several levels beneath the specified TPC working fuel temperature. Furthermore, it was proven that the body cooling loops are required to establish stable equilibrium values of the gas working temperature. The response of the leakless plant to the sudden look of a major leak, e.g. the inadvertent removing of a silicon hose with water circulation on, has been tested using specially made mock-up sectors. The 2 mock-up sectors used have approximately the identical properties as a real sector when it comes to silicon-hose tubing, i.e. the pressure distribution of the water is much like an actual sector. 0.7, as the result of an optimization process, but shall be a subject of further investigation. Figure 81 exhibits the TPC signal of cosmic tracks versus their momentum, [iTagPro technology](https://www.thedreammate.com/home/bbs/board.php?bo_table=free&wr_id=4584475) from 8.Three million events.
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