Abstract
Tests of a prototype lead tungstate calorimeter were made over two weeks at the end of September, 2019, at the DESY II Test Beam Facility in Hamburg, Germany. The purpose of these tests was ...to gain experience with the construction, operation, and performance of a simple lead tungstate calorimeter, and also to compare a traditional triggered readout scheme with a streaming readout approach. These tests are important for the proposed Two-Photon Exchange experiment at DESY 1 and for work towards a future electromagnetic calorimeter that could be used in an Electron-Ion Collider detector. Details on
the comparison of streaming and triggered readout schemes are presented here.
We present the method and results of a renormalization group description of nonequilibrium critical relaxation of model A with evolution from an initial high-temperature state. We calculate the ...two-time dependence of the correlation function and response function and find a violation of the fluctuationdissipation theorem in the nonequilibrium critical regime. For the limit fluctuation-dissipation relation, which is a universal property of the nonequilibrium critical dynamics, we calculate the fluctuation and impurity corrections in the two-loop approximation at the fixed space dimension
d
= 3 using Padé–Borel summation for asymptotic series.
The cluster analysis of burden surface temperature and plotting graphs, in which nodes are predicted states and edges are a type and weight of filled materials, is a control tool of the blast furnace ...operation. The control of material charge aiming for a high efficiency of furnace operation (high yield of cast iron, t/day, low specific energy consumption) is maintained by predicted adjustments of weight or filling frequency on the basis of cycles in graphs with the highest ore charge. The proposed control methods make it possible to maintain efficient operation modes of furnace, to increase ore charges, and to decrease specific coke consumption by 4%.
Separate results are considered for development of methodology and a pendulum-acoustic device for evaluating the level of material damage as a result of corrosion processes. The results obtained are ...new and protected at the level of an invention. The device is prepared and proven in operation. This approach makes it possible from acoustic emission signal parameters formed with pendulum scribing to predict object operating efficiency and its residual life.
The MUon Scattering Experiment, MUSE, at the Paul Scherrer Institute, Switzerland, investigates the proton charge radius puzzle, lepton universality, and two-photon exchange, via simultaneous ...measurements of elastic muon-proton and electron-proton scattering. The experiment uses the PiM1 secondary beam channel, which was designed for high precision pion scattering measurements. We review the properties of the beam line established for pions. We discuss the production processes that generate the electron and muon beams, and the simulations of these processes. Simulations of the π/μ/e beams through the channel using TURTLE and G4beamline are compared. The G4beamline simulation is then compared to several experimental measurements of the channel, including the momentum dispersion at the intermediate focal plane and target, the shape of the beam spot at the target, and timing measurements that allow the beam momenta to be determined. Finally, we conclude that the PiM1 channel can be used for high precision π, μ, and e scattering.
The MUSE experiment at the Paul Scherrer Institute is measuring elastic lepton-proton scattering cross sections in a four-momentum transfer range from
Q
2
of approximately 0.002–0.08 GeV
2
using ...positively and negatively charged electrons and muons. The extraction of the Born cross sections from the experimental data requires radiative corrections. Estimates of the instrumental uncertainties in those corrections have been made using the ESEPP event generator. The results depend in particular on the minimum lepton momentum that contributes to the experimental cross section and the fraction of events with hard initial-state radiation that is detected in the MUSE calorimeter and is excluded from the data. These results show that the angular-dependent instrumental uncertainties in radiative corrections to the electron cross section are less than 0.4% and are negligible for the muon cross section.
The two-photon exchange experiment at DESY Alarcon, R.; Beck, R.; Bernauer, J. C. ...
European physical journal. A, Hadrons and nuclei,
04/2024, Letnik:
60, Številka:
4
Journal Article
Recenzirano
Odprti dostop
We propose a new measurement of the ratio of positron-proton to electron-proton elastic scattering at DESY. The purpose is to determine the contributions beyond single-photon exchange, which are ...essential for the Quantum Electrodynamic (QED) description of the most fundamental process in hadronic physics. By utilizing a 20 cm long liquid hydrogen target in conjunction with the extracted beam from the DESY synchrotron, we can achieve an average luminosity of
2.12
×
10
35
cm
-
2
·
s
-
1
(
≈
200
times the luminosity achieved by OLYMPUS). The proposed two-photon exchange experiment (TPEX) entails a commissioning run at a beam energy of 2 GeV, followed by measurements at 3 GeV, thereby providing new data up to
Q
2
=
4.6
(GeV/
c
)
2
(twice the range of current measurements). We present and discuss the proposed experimental setup, run plan, and expectations.
Timing detectors with SiPM read-out for the MUSE experiment at PSI Rostomyan, T.; Cline, E.; Lavrukhin, I. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
01/2021, Letnik:
986, Številka:
C
Journal Article
Recenzirano
Odprti dostop
The Muon Scattering Experiment at the Paul Scherrer Institute uses a mixed beam of electrons, muons, and pions, necessitating precise timing to identify the beam particles and reactions they cause. ...We describe the design and performance of three timing detectors using plastic scintillator read out with silicon photomultipliers that have been built for the experiment. The Beam Hodoscope, upstream of the scattering target, counts the beam flux and precisely times beam particles both to identify species and provide a starting time for time-of-flight measurements. The Beam Monitor, downstream of the scattering target, counts the unscattered beam flux, helps identify background in scattering events, and precisely times beam particles for time-of-flight measurements. The Beam Focus Monitor, mounted on the target ladder under the liquid hydrogen target inside the target vacuum chamber, is used in dedicated runs to sample the beam spot at three points near the target center, where the beam should be focused.
There are several methods for solving the problem of an adequate dosage form for the hydrophobic and poorly soluble pharmaceutical substances which comprise a structure modification, preparation of ...solid dispersion systems, a change in pH, the use of cosolvents and solubilizers introduction of substances in the formulation of lipid nature and complexation. In this review, special attention is paid to the preparation of nanostructured dosage form for these classes of drugs. Are examples of drugs used successfully in clinical practice the development of which applied these methods.
Research of Optimum Field Distribution on a Cylinder Lavrukhin, I. R.; Yelizarov, A. A.; Bashkevich, S. V.
2023 Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO,
2023-June-28
Conference Proceeding
This paper presents the results of a study of the radiation characteristics of antennas located on a cylindrical surface. The characteristics of the antennas including the directional pattern as well ...as the optimal amplitude distribution on the cylinder in parallel and perpendicular polarizations are determined. In addition, the paper focuses on the analysis of the radiation characteristics of antennas with sufficiently high directivity. The results obtained make it possible to evaluate how the surface curvature affects the formation of the antenna radiation pattern.
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