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Optical Image Postprocessing Methods for Beam Diagnostics by the Example of a Proton Beam Induced Fluorescence Monitor 以质子束诱导荧光监测仪为例的光束诊断光学图像后处理方法
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-04-14 DOI: 10.1134/S1547477125702139
I. I. Polonik, S. A. Gavrilov
{"title":"Optical Image Postprocessing Methods for Beam Diagnostics by the Example of a Proton Beam Induced Fluorescence Monitor","authors":"I. I. Polonik,&nbsp;S. A. Gavrilov","doi":"10.1134/S1547477125702139","DOIUrl":"10.1134/S1547477125702139","url":null,"abstract":"<p>To carry out nondestructive measurements of the profile and position of a proton beam at the low-energy transport channel of the linear accelerator at the Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), a fluorescence monitor based on the fluorescence of residual gas in a vacuum chamber of the channel is used. The data postprocessing methods that allow the beam boundaries to be detected at noisy optical images with a nonuniform background are compared. A comparison of effectiveness of the methods is performed using a test set of generated images and the experimental images recorded during the accelerator operation sessions. The conditions under which each method successfully copes with the beam boundary detection are described. The feasibility of using bandpass filtering to detect beam boundaries on the experimental images recorded by the fluorescence monitor is demonstrated.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 2","pages":"211 - 218"},"PeriodicalIF":0.4,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-Energy Neutrino Propagation through the Earth: Modeling and Sensitivity to Planetary Structure 高能中微子在地球上的传播：对行星结构的建模和敏感性
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-04-14 DOI: 10.1134/S154747712570205X
V. A. Allakhverdyan, S. I. Zavyalov, D. V. Naumov
{"title":"High-Energy Neutrino Propagation through the Earth: Modeling and Sensitivity to Planetary Structure","authors":"V. A. Allakhverdyan,&nbsp;S. I. Zavyalov,&nbsp;D. V. Naumov","doi":"10.1134/S154747712570205X","DOIUrl":"10.1134/S154747712570205X","url":null,"abstract":"<p>The freely distributed software packages Nudisxs and NuPropagator are presented. The nudisxs package is designed to calculate differential and total cross sections of deep inelastic interactions of neutrinos with nucleons during the exchange of <span>(W)</span> and <span>(Z)</span> bosons. The program NuPropagator, which implements the <span>(mathcal{Z})</span>-factor method, is used to calculate the change in neutrino flux as it propagates through matter. An analysis of the contribution of the phase space region where there are no experimental data on parton distributions to the value of the deep inelastic interaction cross sections and to the formation of neutrino flows has been carried out. In addition, the preliminary results of studies of the neutrino tomography sensitivity methods to the density distribution inside the Earth are presented.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 2","pages":"155 - 173"},"PeriodicalIF":0.4,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Erratum to: Development of Platform for Hard Disk Drive Failure Prediction 对硬盘驱动器故障预测平台开发的勘误
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-04-14 DOI: 10.1134/S1547477126020019
A. Dzakhoev, N. Balashov
{"title":"Erratum to: Development of Platform for Hard Disk Drive Failure Prediction","authors":"A. Dzakhoev,&nbsp;N. Balashov","doi":"10.1134/S1547477126020019","DOIUrl":"10.1134/S1547477126020019","url":null,"abstract":"","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 2","pages":"257 - 257"},"PeriodicalIF":0.4,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gravitational form Factors of Pion in a Nonlocal Quark Model 非局域夸克模型中介子的引力形式因子
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-04-14 DOI: 10.1134/S1547477125702048
V. Voronin
{"title":"Gravitational form Factors of Pion in a Nonlocal Quark Model","authors":"V. Voronin","doi":"10.1134/S1547477125702048","DOIUrl":"10.1134/S1547477125702048","url":null,"abstract":"<p>Interaction with external gravitational field is introduced into a nonlocal quark model using the equivalence principle. This allows to define the energy-momentum tensor in flat space and evaluate its hadronic matrix element with external pions. It is found that bubble diagrams give a significant contribution to the corresponding gravitational form factors.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 2","pages":"147 - 154"},"PeriodicalIF":0.4,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polarization Control of Proton and Deuteron Beams in Spin Transparency Mode at the NICA Accelerator Complex NICA加速器复合体自旋透明模式下质子和氘核光束的偏振控制
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-04-14 DOI: 10.1134/S1547477125702085
Yu. N. Filatov, A. M. Kondratenko, M. A. Kondratenko, E. D. Tsyplakov, A. V. Butenko, V. P. Ladygin, V. A. Lebedev, E. M. Syresin, E. A. Butenko, A. I. Chernyshov
{"title":"Polarization Control of Proton and Deuteron Beams in Spin Transparency Mode at the NICA Accelerator Complex","authors":"Yu. N. Filatov,&nbsp;A. M. Kondratenko,&nbsp;M. A. Kondratenko,&nbsp;E. D. Tsyplakov,&nbsp;A. V. Butenko,&nbsp;V. P. Ladygin,&nbsp;V. A. Lebedev,&nbsp;E. M. Syresin,&nbsp;E. A. Butenko,&nbsp;A. I. Chernyshov","doi":"10.1134/S1547477125702085","DOIUrl":"10.1134/S1547477125702085","url":null,"abstract":"<p>A new method for the control of the polarization direction of light nuclei in the NICA accelerator complex is analyzed. The spin transparency (ST) mode for the NICA collider is considered across a continuous energy range with two solenoid snakes and at discrete energies corresponding to integer spin resonances. The feasibility of experimental verification of spin navigators in the ST mode of the Nuclotron, which operates as an injector of polarized protons and deuterons into the NICA collider, is discussed. The proposed spin navigators can be used to control the spin orientation of protons in beams extracted from the Nuclotron. An option for a new figure-eight shaped injector ring for the polarization control of any particle type across the entire beam energy range of the NICA complex is discussed.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 2","pages":"185 - 189"},"PeriodicalIF":0.4,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polarimetry in the Accelerator Complex of the NICA Collider NICA对撞机加速器复合体的偏振测量
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-04-14 DOI: 10.1134/S1547477125702103
A. N. Zelenski, V. P. Ladygin, V. V. Fimushkin, V. B. Dunin, K. A. Ivshin, A. N. Solovev, R. A. Shindin, S. N. Zhabin, Yu. N. Filatov, A. A. Chernikova, A. S. Belov
{"title":"Polarimetry in the Accelerator Complex of the NICA Collider","authors":"A. N. Zelenski,&nbsp;V. P. Ladygin,&nbsp;V. V. Fimushkin,&nbsp;V. B. Dunin,&nbsp;K. A. Ivshin,&nbsp;A. N. Solovev,&nbsp;R. A. Shindin,&nbsp;S. N. Zhabin,&nbsp;Yu. N. Filatov,&nbsp;A. A. Chernikova,&nbsp;A. S. Belov","doi":"10.1134/S1547477125702103","DOIUrl":"10.1134/S1547477125702103","url":null,"abstract":"<p>Experiments with accelerated beams of polarized protons and deuterons (possibly beams of <sup>3</sup>He<sup>++</sup> nuclei) are planned in the NICA collider. This paper presents the developments of polarimeters for the entire range of beam energies from the source to the maximum beam energy in the Nuclotron and the collider. The implementation of the polarimeter system will allow adjustment, optimization and monitoring of polarized beams parameters out of the source, during the transportation and acceleration processes and measuring the polarization of proton and deuteron beams in the Nuclotron and the collider with the required for experiments absolute accuracy.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 2","pages":"196 - 201"},"PeriodicalIF":0.4,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of the Activation of Rare-Earth Isotopes 166,167Ho in (γ, p) Reactions 稀土同位素166167ho在（γ, p）反应中的活化研究
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-04-14 DOI: 10.1134/S1547477125702188
M. V. Zheltonozhskaya, A. P. Chernyaev, A. A. Kim, F. R. Studenikin, P. D. Remizov, I. V. Lebedev, A. A. Shcherbakov
{"title":"Study of the Activation of Rare-Earth Isotopes 166,167Ho in (γ, p) Reactions","authors":"M. V. Zheltonozhskaya,&nbsp;A. P. Chernyaev,&nbsp;A. A. Kim,&nbsp;F. R. Studenikin,&nbsp;P. D. Remizov,&nbsp;I. V. Lebedev,&nbsp;A. A. Shcherbakov","doi":"10.1134/S1547477125702188","DOIUrl":"10.1134/S1547477125702188","url":null,"abstract":"<p>Cross sections of <sup>167</sup>Er(γ, <i>p</i>)<sup>166</sup>Ho and <sup>168</sup>Er(γ, <i>p</i>)<sup>167</sup>Ho reactions weighted by the spectrum of bremsstrahlung radiation with a boundary energy of 23 MeV have been studied and measured. Simulation in the statistical core model using the TALYS1.96 program code shows that non-statistical processes dominate.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 2","pages":"251 - 256"},"PeriodicalIF":0.4,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Event-by-Event Fluctuation Study in UrQMD Model in Heavy Ion Interactions 重离子相互作用中UrQMD模型的逐次涨落研究
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-04-14 DOI: 10.1134/S1547477125702061
G. Bhoumik
{"title":"Event-by-Event Fluctuation Study in UrQMD Model in Heavy Ion Interactions","authors":"G. Bhoumik","doi":"10.1134/S1547477125702061","DOIUrl":"10.1134/S1547477125702061","url":null,"abstract":"<p>Event-by-event pseudo-rapidity fluctuations of pions produced in UrQMD-simulated <sup>16</sup>O-AgBr (60 A GeV) and <sup>32</sup>S-AgBr (200 A GeV) interactions has been analyzed using variable ϕ, a variable defined as a measure of fluctuation and it is sensitive to the correlated pion emission in A–A collision. Non-zero ϕ values indicate the presence of correlation among the pions and hence event-by-event fluctuation for both interactions in UrQMD model. Fluctuations, measured using the ϕ parameter, show clear dependence on rapidity zone width and average multiplicity. ϕ increases with zone width, indicating long range correlations, and decreases with multiplicity, suggesting dilution from multiple particle sources. Stronger fluctuations are observed in <sup>32</sup>S-AgBr interactions. While UrQMD captures key trends, it underestimates fluctuation magnitudes compared to experimental data highlighting limitations in modeling ultra-relativistic nucleus-nucleus collisions. Further, UrQMD events show slightly higher correlation and fluctuation than FRITIOF generated events.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 2","pages":"174 - 180"},"PeriodicalIF":0.4,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Single-Crystal 4π Time Scintillation Spectrometers of Delayed Coincidence 延迟重合的单晶4π时间闪烁光谱仪
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-04-14 DOI: 10.1134/S1547477125702140
V. A. Morozov, N. V. Morozova
{"title":"Single-Crystal 4π Time Scintillation Spectrometers of Delayed Coincidence","authors":"V. A. Morozov,&nbsp;N. V. Morozova","doi":"10.1134/S1547477125702140","DOIUrl":"10.1134/S1547477125702140","url":null,"abstract":"<p>Two types of single-crystal time 4π spectrometers are considered, which are used the scintillators with a short decay time. These spectrometers allow searching for short lived excited and ground states of nuclei in the nano- and microsecond range. Single-crystal scintillation time spectrometry, which enables 4π detection of delayed coincidences, has been developed in two directions–using slow scintillators such as NaJ(Tl) [1] or plastic scintillators with a decay time in the nanosecond range [2]. The methods applied for detecting delayed coincidences were different: while in the former case, the fast-slow coincidence method with the measurement of level lifetimes in the microsecond range is employed, in the second case, it is the autocorrelation method, which allows the measurement of level lifetimes starting from the nanosecond range. The lower limit of the measured times in this range is determined by the duration of the scintillator decay pulse at the level of the integral discriminator response threshold and the dead time of the discriminator used.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 2","pages":"219 - 221"},"PeriodicalIF":0.4,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147667808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combinatorial Spacetime from Loop Quantum Gravity 从圈量子引力论的组合时空
IF 0.4
Physics of Particles and Nuclei Letters Pub Date : 2026-02-08 DOI: 10.1134/S154747712570195X
M. V. Altaisky
{"title":"Combinatorial Spacetime from Loop Quantum Gravity","authors":"M. V. Altaisky","doi":"10.1134/S154747712570195X","DOIUrl":"10.1134/S154747712570195X","url":null,"abstract":"<p>Loop quantum gravity is a perspective candidate for the quantum theory of gravity. However, there is a conceptual controversy in it: having started from the Einstein–Hilbert action and describing spacetime without matter, we can hardly define spacetime as anything other than a set of relations between matter fields. Here, following the Penrose idea of combinatorial spacetime we reformulate loop quantum gravity theory solely in terms of the matter fields.</p>","PeriodicalId":730,"journal":{"name":"Physics of Particles and Nuclei Letters","volume":"23 1","pages":"65 - 75"},"PeriodicalIF":0.4,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147337688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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