THE DEVELOPMENT OF PRODUCT FOR PHOTODIODE PROTECTION AS A PART OF RANGEFINDER

In the presented work the main stages of development of product for photodiode protection as a part of rangefinder are discussed. The analysis of the initial data and conditions under which it is required to place the product to protect the photodiode provided. Prototype was made and corresponding tests and measurement characteristics were carried out. This development will greatly increase the service life of rangefinders

Prototype Lead Tungstate Calorimeter Test for TPEX

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 the DESY test beam facility and for work towards a future electromagnetic calorimeter that could be used in an Electron-Ion Collider detector. Details on all aspects of the test, the subsequent analysis, and the results are presented.Comment: 7 pages, 15 figure

Blinding for precision scattering experiments: The MUSE approach as a case study

Human bias is capable of changing the analysis of measured data sufficiently to alter the results of an experiment. It is incumbent upon modern experiments, especially those investigating quantities considered contentious in the broader community, to blind their analysis in an effort to minimize bias. The choice of a blinding model is experiment specific, but should also aim to prevent accidental release of results before an analysis is finalized. In this paper, we discuss common threats to an unbiased analysis, as well as common quantities that can be blinded in different types of nuclear physics experiments. We use the Muon Scattering Experiment as an example, and detail the blinding scheme used therein.Comment: 6 pages, 3 figure

The Two-Photon Exchange Experiment at DESY

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 $2.12\times10^{35}$ cm$^{-2}\cdot$s$^{-1}\cdot$sr$^{-1}$ ($\approx200$ times the luminosity achieved by OLYMPUS). The proposed TPEX experiment entails a commissioning run at 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.Comment: 10 pages, 14 figures. arXiv admin note: substantial text overlap with arXiv:2301.0470

Timing detectors with SiPM read-out for the MUSE experiment at PSI

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

УДОСКОНАЛЕННЯ ОПЕРАТИВНОГО ПЛАНУВАННЯ РОБОТИ ВАНТАЖНОЇ СТАНЦІЇ В УМОВАХ НЕЧІТКОЇ ВИХІДНОЇ ІНФОРМАЦІЇ

In the article the questions of possibility of construction of mathematical model for prediction of rational quantity of wagons for fulfilling the plan of transportations on the basis of theory of fuzzy sets were considered.В статье рассматриваются вопросы возможности построения математической модели прогнозирования рационального количества вагонов для выполнения плана перевозок на основе теории нечётких множеств.В статті розглядаються питання можливості побудови математичної моделі прогнозування раціональної кількості вагонів для виконання плану перевезень на основі теорії нечітких множин