Journal of the Korean Physical Society最新文献_第10页

High-resolution 352 nm range fluorescence spectra for carbon-14 formaldehyde 碳-14 甲醛的高分辨率 352 纳米范围荧光光谱

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-20 DOI: 10.1007/s40042-024-01092-w

Yonghee Kim, Yongho Cha, Lim Lee, Taek-Soo Kim, Kwang-Hoon Ko

引用次数: 0

Dijet invariant mass distribution near threshold 临界点附近的 Dijet 不变质量分布

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-20 DOI: 10.1007/s40042-024-01075-x

Chul Kim, Taehyun Kwon

引用次数: 0

TCAD simulation study of dual ferroelectric gate field-effect transistors with a recessed channel geometry for non-volatile memory applications 用于非易失性存储器应用的具有凹槽几何形状的双铁电栅极场效应晶体管的 TCAD 仿真研究

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-16 DOI: 10.1007/s40042-024-01079-7

Simin Chen, Dae-Hwan Ahn, Seong Ui An, Tae Hyeon Noh, Younghyun Kim

{"title":"TCAD simulation study of dual ferroelectric gate field-effect transistors with a recessed channel geometry for non-volatile memory applications","authors":"Simin Chen, Dae-Hwan Ahn, Seong Ui An, Tae Hyeon Noh, Younghyun Kim","doi":"10.1007/s40042-024-01079-7","DOIUrl":"10.1007/s40042-024-01079-7","url":null,"abstract":"<div>In this study, we propose a ferroelectric FET (FeFET) structure termed dual ferroelectric recessed channel FeFET (DF-RFeFET), employing metal–ferroelectric (FE)–metal–FE–metal–SiO2 interlayer (IL)–silicon (MFMFMIS) structures. The DF-RFeFET is aimed at enhancing the memory window (MW) for high-performance memory applications. TCAD simulations with calibrated FE parameters and device models reveal that the DF-RFeFET can achieve a larger MW thanks to the enhanced geometric advantage to offer a strong and localized electric field at the inner ferroelectrics near the gate metal’s corner. Moreover, design guidelines for the DF-RFeFET are suggested, including adjusting the inner and outer ferroelectric layers' thickness ratio and the recessed channel depth. The effects of introducing a relatively low-k oxide intermediate layer between dual ferroelectric layers and high-k gate stacks of IL on the MW have also been investigated. Through structural optimization, the DF-RFeFET demonstrated a record MW value of 5.5 V among the previously reported Si FeFETs.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140966995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and integration of DAQ system for beam current monitoring of the KOMAC linac and beamlines 开发和集成用于监测 KOMAC 直列加速器和光束线束流的 DAQ 系统

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-15 DOI: 10.1007/s40042-024-01088-6

Young-Gi Song, Jae-Ha Kim, Sung-Yun Cho, Hyeok-Jung Kwon

{"title":"Development and integration of DAQ system for beam current monitoring of the KOMAC linac and beamlines","authors":"Young-Gi Song, Jae-Ha Kim, Sung-Yun Cho, Hyeok-Jung Kwon","doi":"10.1007/s40042-024-01088-6","DOIUrl":"10.1007/s40042-024-01088-6","url":null,"abstract":"<div>The KOMAC has mainly used commercial oscilloscopes for beam current monitoring (BCM). The beam current is measured with an oscilloscope and the measured signal values are collected using Ethernet. At this process, Experimental Physics and Industrial Control System (EPICS) converts the raw voltage values into beam current and transmits each data to users via Channel Access (CA). The beam waveform is remotely shared by utilizing virtual network computing (VNC) to access the oscilloscope’s graphic desktop. The process variables (PV) of beam currents can be monitored and stored simultaneously, and data analysis is possible at any time using an API. However, as the accelerator duty cycle improves, synchronization becomes necessary for beam data collection, and it has been confirmed that there are occurrences of missing the PV of the beam current. This issue has two main causes. Firstly, data collection operates in a polling method within TCP/IP communication. The advantage of polling is that its implementation is relatively straightforward. Since the client periodically sends requests, the communication system can predict when data will be received, reducing overhead. On the other side, a drawback is that no updates occur until data are requested, resulting in lower real-time capability. Therefore, without synchronization with the timing system, accurate collection of pulsed beam data becomes challenging. Secondly, as the beam duty increases, a considerable amount of beam data is missing due to transmission limits. To address this, a Data Acquisition (DAQ) for beam current acquisition has been developed, and testing and debugging have been completed. This paper describes the design, debugging, and operational plans of beam current monitoring system.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulations of beam-based alignment at RAON SCL2 RAON SCL2 的光束对准模拟

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-15 DOI: 10.1007/s40042-024-01081-z

Hyunchang Jin

引用次数: 0

Prediction study of structural, thermal, and optical characterization of Co0.6Zn0.4Fe2O4 cubic spinel synthesized via sol–gel method for energy storage 通过溶胶-凝胶法合成的用于储能的 Co0.6Zn0.4Fe2O4 立方尖晶石的结构、热和光学特性预测研究

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-15 DOI: 10.1007/s40042-024-01078-8

A. Messaoudi, Aref Omri, A. Benali, M. A. Ghebouli, A. Djemli, M. Fatmi, A. Habila, Asma A. Alothman, N. Hamdaoui, R. Ajjel, B. F. O. Costa, M. F. P. Graca, K. Khirouni

{"title":"Prediction study of structural, thermal, and optical characterization of Co0.6Zn0.4Fe2O4 cubic spinel synthesized via sol–gel method for energy storage","authors":"A. Messaoudi, Aref Omri, A. Benali, M. A. Ghebouli, A. Djemli, M. Fatmi, A. Habila, Asma A. Alothman, N. Hamdaoui, R. Ajjel, B. F. O. Costa, M. F. P. Graca, K. Khirouni","doi":"10.1007/s40042-024-01078-8","DOIUrl":"10.1007/s40042-024-01078-8","url":null,"abstract":"<div>In this comprehensive study, we synthesized Co0.6Zn0.4Fe2O4 cubic spinel via the sol–gel method and characterized its structural, thermal, and optical properties. X-ray diffraction (XRD) verified the crystallization within the cubic Fd-3 m space group, and a detailed analysis determined a crystallite size ranging from 47 to 58 nm. Notably, the calculated crystallite size of 49.4 nm revealed inherent limitations in Scherer’s formula, which does not account for intrinsic strain effects from crystal defects, grain boundaries, and stacking. Optical investigations, utilizing UV–Vis absorption spectroscopy, unveiled a direct optical band gap of 1.26 eV, suggesting semiconductor behavior. The material’s thermal conductivity was found to be highly temperature sensitive, reaching its maximum value for both spin orientations at 900 K, with a quantified value of ke/τ = 4 × 1014 W/(mKs). This thermal behavior, along with the observed disorder (Eu value of 1.41 eV) and higher Urbach energy, offers valuable insights into the material’s response under varying temperature conditions, essential for applications in diverse technological domains.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140977680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A panoramic study of K-factors for 111 processes at the 14 TeV LHC 14 TeV 大型强子对撞机上 111 个过程的 K 因子全景研究

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-15 DOI: 10.1007/s40042-024-01072-0

Dongjoo Kim, Soojin Lee, Hanseok Jung, Dongchan Kim, Jinheung Kim, Jeonghyeon Song

{"title":"A panoramic study of K-factors for 111 processes at the 14 TeV LHC","authors":"Dongjoo Kim, Soojin Lee, Hanseok Jung, Dongchan Kim, Jinheung Kim, Jeonghyeon Song","doi":"10.1007/s40042-024-01072-0","DOIUrl":"10.1007/s40042-024-01072-0","url":null,"abstract":"<div>In this comprehensive study, we investigate K-factors ((K=sigma _{text {NLO}}/sigma _{text {LO}}equiv 1+delta K)) for a broad array of Standard Model processes at the 14 TeV LHC, which are pivotal for background assessments in Beyond the Standard Model (BSM) searches. Using MadGraph5_aMC@NLO, we calculate the leading-order and next-to-leading-order (NLO) cross-sections and compute the corresponding K-factors for 111 processes. Our analysis reveals K-factors ranging from 1.005 for (pp rightarrow jjj) to 4.221 for (pprightarrow W^pm gamma gamma gamma ). Key findings include: (i) processes involving photons display significantly high K-factors, attributed to gluon-initiated processes at NLO; (ii) processes with multiple particle productions, particularly those involving vector bosons, exhibit elevated K-factors due to multiple real emission processes; (iii) there exists an inverse correlation between the number of jets and (delta K), indicating that the addition of jets generally leads to a decrease in (delta K). In addition, our investigation into differential K-factors relative to transverse momentum and invariant mass shows notable increases with higher (p_T), but minimal changes with invariant mass. This study highlights the indispensable role of precise K-factor evaluations for accurate interpretations of BSM search outcomes.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of the surface characteristics of WC–Co structures under Local E-beam irradiation via experiments and molecular dynamics simulations 通过实验和分子动力学模拟研究局部电子束辐照下 WC-Co 结构的表面特性

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-15 DOI: 10.1007/s40042-024-01091-x

Do Young Kim, Taeil Yi

{"title":"Investigation of the surface characteristics of WC–Co structures under Local E-beam irradiation via experiments and molecular dynamics simulations","authors":"Do Young Kim, Taeil Yi","doi":"10.1007/s40042-024-01091-x","DOIUrl":"10.1007/s40042-024-01091-x","url":null,"abstract":"<div>We investigated the atomic structural variations on the free surface of tungsten carbide-cobalt (WC–Co) through both experiments and molecular dynamics simulations under electron beam (e-beam) irradiation. Initially, e-beam experiments were conducted to compare cobalt dissociation and elucidate its physical implications. Subsequently, molecular dynamics simulations qualitatively reproduced the evaporation phenomena that occurred over the free surfaces of the five WC–Co structures. The nano-polycrystalline structure and configurations featuring a small cobalt (Co) surface exhibited a comparatively low number of escaped Co atoms, attributed to their relatively high area/perimeter ratio. This study subsequently investigated the impact of e-beam treatment on the randomness of atomic arrangements and mechanical properties by assessing variations in local entropy and von Mises stress distributions at different positions and in different simulation states. Position-dependent von Mises stress, interatomic potential, and local entropy profiles, reproduced profiles with the same dataset, and two-dimensional colored maps at various simulation states were generated to illustrate individual variations and correlations between local entropy and von Mises stress to demonstrate instability of atomic structures. Our study demonstrated that e-beam treatment influenced the atomic structural instability and mechanical characteristics quantitatively.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generation of multiple orbital angular momentum and on-demand single photons by combining quantum dot to metalens 通过量子点与金属膜的结合产生多轨道角动量和按需单光子

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-15 DOI: 10.1007/s40042-024-01093-9

Xiaodi Liu, Hongxin Huang, Yongle Zhou, Haowen Liang, Juntao Li

{"title":"Generation of multiple orbital angular momentum and on-demand single photons by combining quantum dot to metalens","authors":"Xiaodi Liu, Hongxin Huang, Yongle Zhou, Haowen Liang, Juntao Li","doi":"10.1007/s40042-024-01093-9","DOIUrl":"10.1007/s40042-024-01093-9","url":null,"abstract":"<div>In recent years, remarkable progress has been achieved in generating multiple orbital angular momentum beams, primarily in classical physics, exemplified by technologies such as the vertical-cavity surface-emitting laser (VCSEL). However, the study of multiple orbital angular momentum and on-demand single photons using straightforward and efficient methods still faces limitations in the quantum domain. For example, numerous existing methods necessitate a relatively extensive optical path, posing challenges for optical integration. On-chip generation of OAM single photons lacks the versatility to manipulate various degrees of freedom simultaneously. Here, we propose a design that combines quantum dots with metalens. This method integrates phase multiplexing and spatial multiplexing techniques, enabling the generation of multiple single-photon beams with distinct topological charges and spatial separation through a simpler fabrication process. Our simulation results not only introduce a novel design paradigm but also significantly advance the ongoing research efforts related to multiple orbital angular momentum and on-demand single photons in the quantum realm.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The (^{24})Mg((alpha),p)(^{27})Al reaction measurement using solenoid spectrometer for nuclear astrophysics (SSNAP) 利用用于核天体物理学的螺线管光谱仪 (SSNAP) 测量 $$^{24}$Mg($$alpha$,p)$$^{27}$Al 反应

IF 0.8 4区物理与天体物理

Journal of the Korean Physical Society Pub Date : 2024-05-15 DOI: 10.1007/s40042-024-01083-x

G. M. Gu, K. Y. Chae, S. M. Cha, M. S. Kwag, M. J. Kim, J. Allen, P. D. O’Malley, A. Boeltzig, A. M. Clark, B. Frentz, B. V. Kolk, D. Blankstein, D. W. Bardayan, J. Wilkinson, G. Seymour, K. B. Howard, M. Renaud, M. R. Hall, R. J. deBoer, P. Huestis, R. Kelmar, S. Aguilar, S. L. Henderson

{"title":"The (^{24})Mg((alpha),p)(^{27})Al reaction measurement using solenoid spectrometer for nuclear astrophysics (SSNAP)","authors":"G. M. Gu, K. Y. Chae, S. M. Cha, M. S. Kwag, M. J. Kim, J. Allen, P. D. O’Malley, A. Boeltzig, A. M. Clark, B. Frentz, B. V. Kolk, D. Blankstein, D. W. Bardayan, J. Wilkinson, G. Seymour, K. B. Howard, M. Renaud, M. R. Hall, R. J. deBoer, P. Huestis, R. Kelmar, S. Aguilar, S. L. Henderson","doi":"10.1007/s40042-024-01083-x","DOIUrl":"10.1007/s40042-024-01083-x","url":null,"abstract":"<div>The (^{24})Mg((alpha),p)(^{27})Al reaction was measured using the solenoid spectrometer for nuclear astrophysics at the University of the Notre Dame to study the astrophysical (^{24})Mg((alpha),p)(^{27})Al reaction rate. Alpha beams from the 10-MV FN tandem accelerator impinged on (^{24})Mg solid targets which were made using the vacuum evaporation method on (^{12})C foils. A total of 43 beam energies were used. Recoiling protons from the (^{24})Mg((alpha),p)(^{27})Al reaction were detected using a double-sided position sensitive silicon detector array mounted on the solenoid. Energies, times of flight, and flight distances of particles were measured for particle identification. Protons associated with a wide range of excitation energies (E_x) = 12.42–14.44 MeV in (^{28})Si were identified.</div>","PeriodicalId":677,"journal":{"name":"Journal of the Korean Physical Society","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140973735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0