CERN Accelerating science

CERN Document Server Намерени са 2,049 записа  1 - 10следващкрай  отиване на запис: Търсенето отне 4.00 секунди. 
1.
Neutron irradiation and electrical characterisation of the first 8” silicon pad sensor prototypes for the CMS calorimeter endcap upgrade / CMS HGCAL Collaboration
As part of its HL-LHC upgrade program, the CMS collaboration is replacing its existing endcap calorimeters with a high-granularity calorimeter (CE). The new calorimeter is a sampling calorimeter with unprecedented transverse and longitudinal readout for both electromagnetic and hadronic compartments. [...]
arXiv:2209.10159.- 2023-08-24 - 19 p.
- Published in : JINST Fulltext: 33df321261c1de65891ca8b290f4b7a2 - PDF; 2209.10159 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
2.
Performance of the CMS High Granularity Calorimeter prototype to charged pion beams of 20–300 GeV/c / CALICE Collaboration
The upgrade of the CMS experiment for the high luminosity operation of the LHC comprises the replacement of the current endcap calorimeter by a high granularity sampling calorimeter (HGCAL). The electromagnetic section of the HGCAL is based on silicon sensors interspersed between lead and copper (or copper tungsten) absorbers. [...]
arXiv:2211.04740.- 2023-08-14 - 31 p. - Published in : JINST 18 (2023) P08014 Fulltext: 2211.04740 - PDF; FERMILAB-PUB-23-299-ETD-PPD - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
3.
Using graph neural networks to reconstruct charged pion showers in the CMS High Granularity Calorimeter / CMS HGCAL Collaboration
A novel method to reconstruct the energy of hadronic showers in the CMS High Granularity Calorimeter (HGCAL) is presented. The HGCAL is a sampling calorimeter with very fine transverse and longitudinal granularity. [...]
arXiv:2406.11937.- 2024-11-28 - 27 p. - Published in : JINST 19 (2024) P11025 Fulltext: 2406.11937 - PDF; b5503c82fab7782294f84cb336b7e20a - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
4.
Timing Performance of the CMS High Granularity Calorimeter Prototype / CMS HGCAL Collaboration
This paper describes the experience with the calibration, reconstruction and evaluation of the timing capabilities of the CMS HGCAL prototype in the beam tests in 2018. The calibration procedure includes multiple steps and corrections ranging from tens of nanoseconds to a few hundred picoseconds. [...]
arXiv:2312.14622.- 2024-04-11 - 22 p. - Published in : JINST 19 (2024) P04015 Fulltext: PDF; Fulltext from Publisher: PDF;
5.
Response of a CMS HGCAL silicon-pad electromagnetic calorimeter prototype to 20–300 GeV positrons / CMS HGCAL Collaboration
The Compact Muon Solenoid Collaboration is designing a new high-granularity endcap calorimeter, HGCAL, to be installed later this decade. As part of this development work, a prototype system was built, with an electromagnetic section consisting of 14 double-sided structures, providing 28 sampling layers. [...]
arXiv:2111.06855; FERMILAB-PUB-22-427-PPD.- 2022-05-12 - 29 p. - Published in : JINST 17 (2022) P05022 Fulltext: 2111.06855 - PDF; document - PDF; cbd097f03712745131ad048fd9099ac7 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server
6.
The DAQ system of the 12,000 Channel CMS High Granularity Calorimeter Prototype / CMS HGCAL Collaboration
The CMS experiment at the CERN LHC will be upgraded to accommodate the 5-fold increase in the instantaneous luminosity expected at the High-Luminosity LHC (HL-LHC). Concomitant with this increase will be an increase in the number of interactions in each bunch crossing and a significant increase in the total ionising dose and fluence. [...]
arXiv:2012.03876.- 2021-04-15 - 20 p. - Published in : JINST 16 (2021) T04001 Fulltext: fermilab-pub-21-599-cms - PDF; 2012.03876 - PDF; Fulltext from publisher: PDF; External link: Preprint
7.
Construction and commissioning of CMS CE prototype silicon modules / CMS CE Collaboration
As part of its HL-LHC upgrade program, the CMS Collaboration is developing a High Granularity Calorimeter (CE) to replace the existing endcap calorimeters. The CE is a sampling calorimeter with unprecedented transverse and longitudinal readout for both electromagnetic (CE-E) and hadronic (CE-H) compartments. [...]
arXiv:2012.06336.- 2021-04-20 - 39 p. - Published in : JINST 16 (2021) T04002 Fulltext: fermilab-pub-21-430-cms - PDF; 2012.06336 - PDF; Fulltext from publisher: PDF; External link: Fermilab Accepted Manuscript
8.
Bayesian inference for form-factor fits regulated by unitarity and analyticity / Flynn, J.M. (Southampton U.) ; Jüttner, A. (Southampton U. ; CERN) ; Tsang, J.T. (CERN)
We propose a model-independent framework for fitting hadronic form-factor data, which is often only available at discrete kinematical points, using parameterisations based on to unitarity and analyticity. In this novel approach the latter two properties of quantum-field theory regulate the ill-posed fitting problem and allow model-independent predictions over the entire physical range. [...]
arXiv:2303.11285; CERN-TH-2023-047.- 2023-12-27 - 46 p. - Published in : JHEP 2312 (2023) 175 Fulltext: document - PDF; 2303.11285 - PDF;
9.
High-temperature superconducting screens for magnetic field-error cancellation in accelerator magnets / Bortot, L. (CERN ; Darmstadt, Tech. U.) ; Mentink, M. (CERN) ; Petrone, C. (CERN) ; Van Nugteren, J. (CERN) ; Deferne, G. (CERN) ; Koettig, T. (CERN) ; Kirby, G. (CERN) ; Pentella, M. (CERN ; Turin Polytechnic) ; Perez, J.C. (CERN) ; Pincot, F.O. (CERN) et al.
Accelerators magnets must have minimal magnetic field imperfections for reducing particle-beam instabilities. In the case of coils made of high-temperature superconducting (HTS) tapes, the field imperfections from persistent currents need to be carefully evaluated. [...]
arXiv:2103.14354.- 2021-08-26 - 11 p. - Published in : Supercond. Sci. Technol. 34 (2021) 105001 Fulltext: PDF;
10.
Development of the Self-Modulation Instability of a Relativistic Proton Bunch in Plasma / AWAKE Collaboration
Self-modulation is a beam-plasma instability that is useful to drive large-amplitude wakefields with bunches much longer than the plasma skin depth. We present experimental results showing that, when increasing the ratio between the initial transverse size of the bunch and the plasma skin depth, the instability occurs later along the bunch, or not at all, over a fixed plasma length, because the amplitude of the initial wakefields decreases. [...]
arXiv:2305.05478.- 2023-08-01 - 10 p. - Published in : Phys. Plasmas 30 (2023) 083104 Fulltext: 2305.05478 - PDF; Publication - PDF;

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