Inhaled particles最新文献_第3页

Design and Beam Dynamic Studies of an Injector for a Compact THz Coherent Radiation Source 紧凑太赫兹相干辐射源注入器的设计与光束动力学研究

Inhaled particles Pub Date : 2023-06-16 DOI: 10.3390/particles6020040

S. Jummunt, Wanisa Promdee, T. Chanwattana, Nawin Junthong, S. Chunjarean, S. Klinkhieo

引用次数: 0

Development of Type A Quadrupole Magnet for Siam Photon Source II Siam光子源用A型四极磁体的研制2

Inhaled particles Pub Date : 2023-06-09 DOI: 10.3390/particles6020039

S. Prawanta, T. Leetha, Pariwat Singthong, Pajeeraphorn Numanoy, A. Kwankasem, V. Sooksrimuang, C. Preecha, S. Klinkiew, P. Sunwong

{"title":"Development of Type A Quadrupole Magnet for Siam Photon Source II","authors":"S. Prawanta, T. Leetha, Pariwat Singthong, Pajeeraphorn Numanoy, A. Kwankasem, V. Sooksrimuang, C. Preecha, S. Klinkiew, P. Sunwong","doi":"10.3390/particles6020039","DOIUrl":"https://doi.org/10.3390/particles6020039","url":null,"abstract":"A prototype of a type A quadrupole magnet has been designed and manufactured for the 3 GeV storage ring of Siam Photon Source II, the second synchrotron light source in Thailand. The required quadrupole gradient is 51 T/m with the magnet effective length being 162 mm. Magnet modeling and magnetic field calculation were performed using Radia and Opera-3D. The bore radius of the magnet is 16 mm. The magnet will be operated at the excitation of 5544 A-turns. A mechanical analysis of the magnet structure was performed in SOLIDWORKS and ANSYS, where the maximum deformation of 0.003 mm was found at the magnet poles, and the first-mode natural frequency was higher than 100 Hz. The magnet yoke is made of AISI 1006 low-carbon steel with a fabrication tolerance of ±0.020 mm. Magnet coils are water-cooled and made of high-purity copper. The temperature rise of the coils was below 3.0 °C at the maximum excitation of 6664 A-turns, which is 20% above the operating point. Magnetic field measurement was carried out using the Hall probe technique. The measured magnetic field and coil temperature of the prototype show good agreement with the calculations.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85963318","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

Density and Mass Function for Regular Rotating Electrically Charged Compact Objects Determined by Nonlinear Electrodynamics Minimally Coupled to Gravity 非线性电动力学与重力最小耦合确定的规则旋转带电致密物体的密度和质量函数

Inhaled particles Pub Date : 2023-06-06 DOI: 10.3390/particles6020038

I. Dymnikova

引用次数: 0

The Particle-Tracking Simulation of a New Photocathode RF Gun in the Free-Electron Laser Facility, KU-FEL 自由电子激光装置中新型光电阴极射频枪的粒子跟踪模拟

Inhaled particles Pub Date : 2023-06-06 DOI: 10.3390/particles6020037

Yuhao Zhao, H. Zen, H. Ohgaki

引用次数: 0

Toward the System Size Dependence of Anisotropic Flow in Heavy-Ion Collisions at sNN = 2–5GeV sNN = 2-5GeV重离子碰撞中各向异性流动的系统尺寸依赖性

Inhaled particles Pub Date : 2023-06-02 DOI: 10.3390/particles6020036

M. Mamaev, A. Taranenko

引用次数: 0

Testing the Paradigm of Nuclear Many-Body Theory 核多体理论范式的检验

Inhaled particles Pub Date : 2023-05-31 DOI: 10.3390/particles6020035

O. Benhar

引用次数: 3

Parameters and Pulsation Constant of Cepheid 造父变星的参数和脉动常数

Inhaled particles Pub Date : 2023-05-26 DOI: 10.3390/particles6020034

S. V. Sinitsyn

{"title":"Parameters and Pulsation Constant of Cepheid","authors":"S. V. Sinitsyn","doi":"10.3390/particles6020034","DOIUrl":"https://doi.org/10.3390/particles6020034","url":null,"abstract":"The analysis of fifty empirical period-radius relations and forty-three empirical period-luminosity relations is performed for the Cepheids. It is found that most of these relations have significant systematic errors. A new metrological method is suggested to exclude these systematic errors using the new empirical metrological relations and the empirical temperature scale of the various samples of the Cepheids. In this regard, the reliable relations between the mass, radius, effective surface temperature, luminosity, absolute magnitude on the one hand, and the pulsation period on the other hand, as well as the reliable dependence of the radius on the mass are determined for the Cepheids of types δ Cephei and δ Scuti from the Galaxy. These reliable relations permit us to accurately determine the empirical value of the pulsation constant for the Cepheids of both types for the first time. It is found that the pulsation constant very weakly depends on the pulsation period of the Cepheid, contrary to the known theoretical calculation. Hence, the Cepheids pulsate almost as a unified whole and homogeneous spherical body in wide ranges of a star’s mass and evolutionary state with an extremely inhomogeneous distribution of stellar substance over its volume. Therefore, it is first suggested that the pulsation of the Cepheid is, first of all, the pulsation of the almost unified whole and homogenous shell of its gravitational mass. This pulsation is triggered by well-known effects; for example, the local optical opacity of the stellar substance and overshooting, using the usual pulsation of the stellar substance.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86578092","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

Mechanisms of Producing Primordial Black Holes and Their Evolution 原始黑洞的产生机制及其演化

Inhaled particles Pub Date : 2023-05-14 DOI: 10.3390/particles6020033

Maxim A. Krasnov, V. Nikulin

引用次数: 0

Centrality Determination in Heavy-Ion Collisions Based on Monte-Carlo Sampling of Spectator Fragments 基于旁观者碎片蒙特卡罗采样的重离子碰撞中心性确定

Inhaled particles Pub Date : 2023-05-10 DOI: 10.3390/particles6020032

I. Segal

引用次数: 4

The van der Waals Hexaquark Chemical Potential in Dense Stellar Matter 稠密恒星物质中的范德华六夸克化学势

Inhaled particles Pub Date : 2023-05-09 DOI: 10.3390/particles6020031

K. Andrew, E. Steinfelds, Kristopher A. Andrew

{"title":"The van der Waals Hexaquark Chemical Potential in Dense Stellar Matter","authors":"K. Andrew, E. Steinfelds, Kristopher A. Andrew","doi":"10.3390/particles6020031","DOIUrl":"https://doi.org/10.3390/particles6020031","url":null,"abstract":"We explore the chemical potential of a QCD-motivated van der Waals (VDW) phase change model for the six-quark color-singlet, strangeness S = −2 particle known as the hexaquark with quark content (uuddss). The hexaquark may have internal structure, indicated by short range correlations that allow for non-color-singlet diquark and triquark configurations whose interactions will change the magnitude of the chemical potential. In the multicomponent VDW Equation of State (EoS), the quark-quark particle interaction terms are sensitive to the QCD color factor, causing the pairing of these terms to give different interaction strengths for their respective contributions to the chemical potential. This results in a critical temperature near 163 MeV for the color-singlet states and tens of MeV below this for various mixed diquark and triquark states. The VDW chemical potential is also sensitive to the number density, leading to chemical potential isotherms that exhibit spinodal extrema, which also depend upon the internal hexaquark configurations. These extrema determine regions of metastability for the mixed states near the critical point. We use this chemical potential with the chemical potential-modified TOV equations to investigate the properties of hexaquark formation in cold compact stellar cores in beta equilibrium. We find thresholds for hexaquark layers and changes in maximum mass values that are consistent with observations from high mass compact stellar objects such as PSR 09043 + 10 and GW 190814. In general, we find that the VDW-TOV model has an upper stability mass and radius bound for a chemical potential of 1340 MeV with a compactness of C~0.2.","PeriodicalId":75932,"journal":{"name":"Inhaled particles","volume":"91 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88373236","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