scholarly journals Studies of high-field QED with the LUXE experiment at the European XFEL

2021 ◽  
Vol 16 (12) ◽  
pp. C12030
Author(s):  
M. Borysova
Keyword(s):  
High Field ◽  
Radiation Detectors ◽  
High Rate ◽  
Electromagnetic Calorimeter ◽  
Lead Glass ◽  
Radiation Background ◽  
Expected Performance ◽  
Back Scattering ◽  
Radiation Conditions ◽  
Electron And Photon

Abstract The LUXE experiment aims at studying high-field QED in electron-laser and photon-laser interactions, with the 16.5 GeV electron beam of the European XFEL and a laser beam with power of up to 350 TW. The experiment will measure the spectra of electrons and photons in non-linear Compton scattering where production rates in excess of 109 are expected per 1 Hz bunch crossing. At the same time positrons from pair creation in either the two-step trident process or the Breit-Wheeler process will be measured, where the expected rates range from 10−3 to 104 per bunch crossing, depending on the laser power and focus. These measurements have to be performed in the presence of low-energy high radiation-background. To meet these challenges, for high-rate electron and photon fluxes, the experiment will use Cherenkov radiation detectors, scintillator screens, sapphire sensors as well as lead-glass monitors for back-scattering off the beam-dump. A four-layer silicon-pixel tracker and a compact sampling electromagnetic calorimeter will be used to measure the positron spectra. The layout of the experiment and the expected performance under the harsh radiation conditions will be presented.

scholarly journals The lead-glass electromagnetic calorimeter for the SELEX experiment

2005 ◽  
Vol 545 (1-2) ◽  
pp. 114-138 ◽  
Author(s):  
M.Y. Balatz ◽  
P.S. Cooper ◽  
G.V. Davidenko ◽  
A.G. Dolgolenko ◽  
G.B. Dzyubenko ◽  
...  
Keyword(s):  
Electromagnetic Calorimeter ◽  
Lead Glass

Optimizing the performance of the CMS Electromagnetic Calorimeter to measure Higgs properties during Phase I and Phase II of the LHC

2020 ◽  
Vol 35 (34n35) ◽  
pp. 2044011
Author(s):  
Amina Zghiche
Keyword(s):  
Energy Calibration ◽  
Electromagnetic Calorimeter ◽  
High Luminosity ◽  
Lead Tungstate ◽  
Decay Channels ◽  
Readout Electronics ◽  
Timing Resolution ◽  
Higgs Decay ◽  
Electron And Photon

The CMS Electromagnetic Calorimeter (ECAL), is a high granularity lead tungstate (PbWO4) crystal calorimeter operating at the CERN LHC. The ECAL performance has been crucial in the discovery and subsequent characterization of the Higgs boson. The original ECAL design considerations, and the improvements to the energy reconstruction and energy calibration algorithms to cope with the LHC Run II are described. For the High-Luminosity LHC (HL-LHC) upgrades to ECAL are necessary. The crystals in the barrel region will be retained, defining the HL-LHC CMS barrel electromagnetic calorimeter ECAL. The readout electronics will be upgraded and operating at lower temperatures, to maintain the required performance of ECAL from 2027 onwards. The new readout electronics, the timing resolution and the electron and photon reconstruction efficiencies and energy resolution expected for HL-LHC are presented. The performance relevant to a number of key Higgs decay channels is reported.

scholarly journals High-rate dead-time corrections in a general purpose digital pulse processing system

2015 ◽  
Vol 22 (5) ◽  
pp. 1190-1201 ◽  
Author(s):  
Leonardo Abbene ◽  
Gaetano Gerardi
Keyword(s):  
High Resolution ◽  
Dead Time ◽  
Radiation Detectors ◽  
High Rate ◽  
Energy Spectra ◽  
Dead Time Correction ◽  
Pulse Processing ◽  
Digital Pulse ◽  
Time Correction ◽  
Digital Pulse Processing

Dead-time losses are well recognized and studied drawbacks in counting and spectroscopic systems. In this work the abilities on dead-time correction of a real-time digital pulse processing (DPP) system for high-rate high-resolution radiation measurements are presented. The DPP system, through a fast and slow analysis of the output waveform from radiation detectors, is able to perform multi-parameter analysis (arrival time, pulse width, pulse height, pulse shape,etc.) at high input counting rates (ICRs), allowing accurate counting loss corrections even for variable or transient radiations. The fast analysis is used to obtain both the ICR and energy spectra with high throughput, while the slow analysis is used to obtain high-resolution energy spectra. A complete characterization of the counting capabilities, through both theoretical and experimental approaches, was performed. The dead-time modeling, the throughput curves, the experimental time-interval distributions (TIDs) and the counting uncertainty of the recorded events of both the fast and the slow channels, measured with a planar CdTe (cadmium telluride) detector, will be presented. The throughput formula of a series of two types of dead-times is also derived. The results of dead-time corrections, performed through different methods, will be reported and discussed, pointing out the error on ICR estimation and the simplicity of the procedure. Accurate ICR estimations (nonlinearity < 0.5%) were performed by using the time widths and the TIDs (using 10 ns time bin width) of the detected pulses up to 2.2 Mcps. The digital system allows, after a simple parameter setting, different and sophisticated procedures for dead-time correction, traditionally implemented in complex/dedicated systems and time-consuming set-ups.

Stable, High Field Silicon p‐n Junction Radiation Detectors

1963 ◽  
Vol 34 (11) ◽  
pp. 1283-1285 ◽  
Author(s):  
G. C. Huth ◽  
H. E. Bergeson ◽  
J. B. Trice
Keyword(s):  
High Field ◽  
Radiation Detectors

High field critical current densities for a thick Nb12Al3Ge superconductor made by high‐rate sputtering

1974 ◽  
Vol 45 (12) ◽  
pp. 5462-5463 ◽  
Author(s):  
S. D. Dahlgren ◽  
M. Suenaga ◽  
T. S. Luhman
Keyword(s):  
Critical Current ◽  
High Field ◽  
High Rate ◽  
Current Densities

An Electromagnetic Calorimeter for Use in a Strong Magnetic Field at LEP Based on CEREN 25 Lead Glass and Vacuum Photo-Triodes

1985 ◽  
Vol 32 (1) ◽  
pp. 736-740 ◽  
Author(s):  
R. M. Brown ◽  
W. M. Evans ◽  
C. N. P. Gee ◽  
P. W. Jeffreys ◽  
G. N. Patrick ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Electromagnetic Calorimeter ◽  
Lead Glass

EM CALORIMETER COMPLEX FOREST FOR THE π0 AND η PHOTO-PRODUCTION EXPERIMENTS AT LNS-SENDAI

2009 ◽  
Vol 24 (11n13) ◽  
pp. 978-981 ◽  
Author(s):  
K. SUZUKI ◽  
H. FUJIMURA ◽  
R. HASHIMOTO ◽  
T. ISHIKAWA ◽  
J. KASAGI ◽  
...  
Keyword(s):  
High Efficiency ◽  
Solid Angle ◽  
Data Acquisition System ◽  
Total Solid ◽  
High Rate ◽  
Lead Glass ◽  
System A ◽  
Total Solid Angle ◽  
Electro Magnetic ◽  
Photo Production

A large solid angle γ-ray detector system, FOREST, has been constructed at LNS-Sendai to study the π0 and η photo-production reactions. The FOREST detector consists of three electro-magnetic calorimeters: pure CsI crystals, Lead/SciFi blocks and Lead Glass Cherenkov counters. It covers about 90% of the total solid angle. A new data acquisition system for the FOREST detector has been developed to handle high rate trigger events with a high efficiency. To investigate performances of FOREST and the DAQ system, a test experiment has been conducted. The π0 and η mesons are clearly observed. A DAQ efficiency of 76% has been obtained at a 2 kHz trigger request.

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