bluuebunny/crossref_metadata_2025_split huggingface dataset:
Conceptualizations of linguistic politeness in Latin
Authors: Unceta Gómez Luis 
Published: December 2019

AbstractThis paper presents an analysis of conceptions of linguistic politeness in ancient Rome. Using lexical analysis, it scrutinizes first-order data recoverable from the Latin sources at our disposal, in order to determine the notions and dimensions of politeness that Romans were sensitive to. This kind of approach is helpful, primarily, when developing a suitable theoretical framework for dealing with the particular expressions of linguistic politeness in Latin. Moreover, it provides us with additional explanations of the historical dimension of politeness and of the creation and development of notions of politeness in Europe.
The individual on the move
Authors: Zhu Yifan , Kim Kyung Hye 
Published: December 2019

Abstract
The concept of ‘individualism’ is central to modern understandings of human behavior and society, yet it is also
an example of a “new” concept introduced to Chinese society in the early 1900s. Due to the complex interplay between linguistic,
socio-cultural, and ideological factors involved, the meaning of ‘individualism’ has undergone continual change from the early
1900s to today. As translation not only plays a vital role in knowledge dissemination, but is also a site where dynamic knowledge
negotiation is carried out, this study uses a corpus-based methodology to examine the ways in which ‘individualism’ has been
redefined, re-established and reconstructed in China through translation during the period between 1910 and 2010. The study
ultimately argues that concepts and ideas are constantly renegotiated and redefined as they travel from one culture to another,
and as they travel through time.
Beam optics design of the superconducting region of the JAEA ADS
Authors: Yee-Rendon B , Kondo Y , Maekawa F , Meigo S , Tamura J 
Published: December 2019

Abstract
The Japan Atomic Energy Agency (JAEA) is proposing an Accelerator Driven Subcritical System (ADS) for the transmutation of the nuclear waste. ADS will consist of a superconducting CW proton linear accelerator of 30 MW and a subcritical nuclear reactor core. The main part of the acceleration will take part in the superconducting region using five types of radio frequency cavities. The ADS operation demands a high intensity and reliability of the beam. Therefore, the beam optics design plays a fundamental role to reduce the beam loss, control emittance growth and beam halo.
Experimental observation of low-order collective oscillation modes in a strong-focusing lattice
Authors: Ito K , Kurauchi T , Higaki H , Okamoto H 
Published: December 2019

Abstract
In a conventional linear Paul trap (LPT), four electrode rods are placed symmetrically around the trap axis to generate a radio-frequency (rf) quadrupole field for transverse ion confinement. The periodic nature of the external focusing potential can give rise to serious ion losses under a specific condition. The loss mechanism is essentially the same as the coherent betatron resonance well-known in intense beam dynamics [1, 2]. In fact, the collective motion of an ion plasma in the LPT is shown equivalent to that of a charged-particle beam traveling through an alternating-gradient (AG) focusing lattice. In the present study, we perform the direct measurement of low-order coherent oscillation modes in the LPT by detecting image currents induced on the electrodes' surfaces. The four-rod structure of the LPT allows us to pick up weak signals from the dipole and quadrupole oscillations of a plasma bunch. These signals are Fourier analyzed to evaluate the coherent oscillation tune at different initial ion densities. The measured tune of the quadrupole mode is used to deduce the tune depression as a function of ion number stored in the LPT.
Accumulating laser-coolable ions in a linear Paul trap for ultrahigh-density beam dynamics experiment
Authors: Ito K , Masuda T , Higaki H , Okamoto H 
Published: December 2019

Abstract
An ion plasma confined in a linear Paul trap (LPT) exhibits the dynamic behavior physically equivalent to that of a charged-particle beam in an alternating-gradient (AG) transport channel. The Simulator of Particle Orbit Dynamics (S-POD) is a compact apparatus designed on the basis of this fact for diverse beam-physics experiments. We have so far employed Ar+ ions that can readily be produced from neutral Ar gas atoms through the electron bombardment process. A space-charge-induced tune shift of up to about 20% of the bare tune can be achieved in Ar+ plasmas. We are now preparing for future S-POD experiment to explore even higher beam-density regions. For this purpose, a large number of Ca+ ions need to be stored in the LPT. Since S-POD is equipped with a powerful laser cooler for Ca+, the use of this ion species vastly expands the density range we can survey. The production of an intense bunch of Ca+ ions is, however, not so easy because of some technical reasons. By optimizing the operating condition of a multi-sectioned LPT, we succeeded in increasing the number of accumulated Ca+ ions to the level comparable to Ar+ ion plasmas. This paper reports on updated results of the experiment.
Coupling and Space Charge studies at the CERN PSB
Authors: Asvesta F , Antoniou F , Bartosik H , Di Giovanni G P , Papaphilippou Y 
Published: December 2019

Abstract
In the nominal optics of the CERN PS-Booster (PSB), the fourth order coupling resonance is excited by space charge (Montague resonance [1]) due to the same integer tune values. This resonance can be avoided by changing the tunes to different integers. A new PSB opticsis presented and emittance measurements crossing the coupling resonance for the nominal and the new optics are shown.
Can a Paul Ion Trap Be Used to Investigate Nonlinear Quasi-Integrable Optics?
Authors: Martin L. K. , Kelliher D. J. , Sheehy S. L. 
Published: December 2019

Abstract
Here we describe the design of an experimental setup using the IBEX Paul trap to test nonlinear quasi-integrable optics, an accelerator lattice design to create stable high intensity beams. In 2010 Danilov and Nagaitsev found a realisable nonlinear potential which can create integrable optics in an accelerator when embedded in a linear lattice that provides round beams. This concept will be tested in the IOTA ring at Fermilab. It is important to further test this concept over a wide parameter range, preferably in a simplified experimental setup such as IBEX. The IBEX Paul trap is capable of replicating the transverse dynamics of a high intensity accelerator without dispersion or chromaticity.
Novel FPGA-based Instrumentation for Personnel Safety Systems in Particle Accelerator Facility
Authors: Pioli S. , Frasciello O. , Beretta M. M. , Ciambrone P. , Di Giulio C. , Buonomo B. , Belli M. , Valente P. , Variola A. 
Published: December 2019

Abstract
Personnel Safety System for particle accelerator facility involves different devices to monitor gates, shielding doors, dosimetry stations, search and emergency buttons. In order to achieve the proper reliability, fail-safe and fail-proof capabilities, these systems are developed compliant with safety standards (like the IEC-61508 on “Functional Safety”, ANSI N43.1 “Radiation Safety for the design and operation of Particle Accelerator” and NCRP report 88) involving stable technologies like electro-mechanical relays and, recently, PLC.
As part of the Singularity project at Frascati National Laboratories of INFN, this work will report benchmark of a new FPGA-based system from the design to the validation phase of the prototype currently operating as personnel safety system at the Beam Test Facility (BTF) of Dafne facility.
This novel instrument is capable of: devices monitoring in real-time at 1 kHz, dual modular redundancy, fail-safe and fail-proof, multi-node distributed solution on optical link, radiation damage resistance and compliant with IEC-61508, ANSI N43.1 and NCRP report 88.
The aim of this FPGA-based system is to illustrate the feasibility of FPGA technology in the field of personnel safety for particle accelerator in order to take advantage of a fully digital system integrated with facility control system, evaluate the related reliability and availability and realize a standard, scalable and exible hardware solution also for other fields with similar requirements like machine protection systems.
Timing Synchronization System for Beam Injection from the SACLA Linac to the SPring-8 Storage Ring
Authors: Ohshima T , Maesaka H , Hosoda N , Matsubara S 
Published: December 2019

Abstract
We developed a timing synchronization system for injection from the linac of the XFEL machine, SACLA, to the storage ring (SR) of SPring-8. This injection scheme is demanded by the low-emittance upgraded ring in the future. Since the RF frequencies of the linac and the SR do not have an integer multiples relation, we have to introduce a new scheme to synchronize the beam ejection timing of the linac to the desired RF bucket timing of the SR. The timing is roughly adjusted by re-clocking the master trigger signal of the linac with the SR bucket timing. The residual timing difference is compensated by applying frequency modulation to the linac master oscillator. The amount of the timing difference is obtained by sampling the linac reference signal with an ADC where the SR reference signal is used as a sampling clock. We built this synchronizing system with MTCA.4 modules. The system was installed to the linac and the measured timing jitter was better than 4 ps in rms, which was enough to obtain high injection efficiency.
Alarm system of IRFEL at NSRL
Authors: Chen X , Song Y , Shao Z , Li C , Xuan K , Wang J , Liu G 
Published: December 2019

Abstract
An InfraRed Free Electron Laser Light (IRFEL) is under commissioning at National Synchrotron Radiation Laboratory (NSRL). The control system of IRFEL is a distributed system based on Experimental Physics and Industrial Control System (EPICS). The alarm system is an essential part of the control system. It is developed based on the software Phoebus. The module named “Alarms” in Phoebus can store states and configuration information of the Process Variable (PV) in the Kafka topics. To meet our requirements, 3 kinds of alarm message distribution applications are developed, i.e. Web-Based GUI, WeChat and SMS. This paper will introduce the alarm system architecture and the implementations of the applications for alarm message distribution.
Development of a silicon strip detector for novel accelerators at SINBAD
Authors: Jaster-Merz S , Assmann R W , Burkart F , Dorda U , Kraemer U , Panofski E , Stanitzki M 
Published: December 2019

Abstract
At the SINBAD facility (DESY Hamburg), novel particle acceleration techniques like dielectric laser acceleration (DLA) structures will be tested using the ARES linac. Due to the small size of these structures, the accelerated electron beams only have a very low (sub-pC) charge. To determine the energy distribution of these beams, a silicon strip detector for the ARES linac spectrometer is currently under development. This detector fulfils the requirements of high spatial resolution for low charge density beams. The detector consists of two 1 cm × 1 cm silicon strip sensors and readout components. The design of the detector, its components and an estimate of its behaviour for a specific electron beam distribution are presented and discussed.
A Channel Access Software Platform for Beam Dynamics Applications in Scripting Languages
Authors: Chrin J. , Aiba M. , Snuverink J. 
Published: December 2019

Abstract
To facilitate the seamless integration of EPICS (Experimental Physics and Industrial Control System) into high-level applications in particle accelerators, a dedicated modern C++ Channel Access interface library, CAFE, provides a comprehensive and user- friendly interface to the underlying control system. Functionality is provided for synchronous and asynchronous interaction of single and composite groups of channels, coupled with an abstract layer tailored towards beam dynamics applications and complex modelling of virtual accelerators. Equivalent consumable solutions in scripting and domain-specific languages can then be accelerated by providing bindings to the relevant methods of the interface platform. This is exemplified by CAFE's extensive MATLAB® interface, incarnated through a single MATLAB executable (MEX) file, and a high performance Python interface written in the Cython programming language. A number of gratifying particularities specific to these language extension modules are revealed.
Design a precise stability controller for high power pulse modulator based on FPGA
Authors: Liu Y , Tong J , Gu M , Lin L , Yuan Q 
Published: December 2019

Abstract
Shanghai Soft X-ray Free Electron Laser Test Facility (SXFEL-TF) has been fulfilled the construction assignments and passed the acceptance check at Shanghai Institute of Applied Physics (SINAP), Chinese Academy of Sciences. The stability of microwave system is one of the major factors to get better beam performance. It is mainly determined by klystron and modulators power supply. The beam voltage stability of pulse modulator, which is the cathode voltage source of the microwave amplifier, is directly affecting the microwave amplitude and phase. The requirement of the microwave stability is 0.04% (rms) for amplitude and 0.05% (rms) for phase tolerance. This paper shows the design considerations of stability improvement and suitable upgrade scheme of the controller for Shanghai SXFEL pulse modulator.
A novel microwave switch-based LLRF system for long-term system phase drift calibration
Authors: Lin Z.Y. , Du Y. C. , Huang W.H. , Tang J.H. , Tang C.X. , Huang G. , Xu Y.L , Zhang D. , Sun Z.C. 
Published: December 2019

Abstract
Long-term phase stability is a significant issue for Low-level RF systems. Crosstalk and temperature effect on the RF field detectors would significantly limit the performance of phase detecting and phase locking. A novel microwave switch-based LLRF system has been developed in Tsinghua Accelerator Lab. Microwave switches are applied in the chopper circuit to turn continuous waves into pulse waves in the time domain to avoid mutual interference of signals. In this paper, the LLRF sys-tem based on microwave switches is presented. The result of preliminary long-term experiments shows the phase stability can achieve about 50fs RMS slow drift. The peak-to-peak value of the slow drift was ~100fs (~2 °C p-p) in 4 days.
New Undulator and Front End for XAIRA beamline at ALBA
Authors: Campmany J. , Marcos J. , Massana V. 
Published: December 2019

Abstract
A new microfocus beamline for macromolecular crystallography, XAIRA, is being built at ALBA synchrotron light source. The light source for this new beamline is an in-vacuum undulator that can reach the spectral range from 4 keV up to 20 keV. The in-vacuum undulator was tendered in 2018 and awarded to Kyma-RI consortium, and will be delivered to ALBA in November 2019. The Front End has been designed accordingly. It was tendered in 2018 and awarded to FMB. It will be delivered in October 2019. In this paper we present the ID and FE designs.
Analysis on the thermal response to beam impedance heating of the post LS2 proton synchrotron beam dump
Authors: Teofili L , Marongiu M , Migliorati M , Giordano F , Lamas I , Nuiry F-X , Romagnoli G , Salvant B 
Published: December 2019

Abstract
The High Luminosity Large Hadron Collider (HL-LHC) and the LHC-Injection Upgrade (LIU) projects at CERN are upgrading the whole CERN accelerators chain to increase beam brightness and intensity. In this scenario, some critical machine components have to be redesigned and rebuilt. Due to the increase in beam intensity, minimizing the electromagnetic interaction between the beam and devices is a crucial design task. Indeed, these interactions could lead to beam instabilities and excessive thermo-mechanical loadings in the device. In this context, this paper presents an example of multi-physics study to investigate the impedance related thermal effects. The analysis is performed on the conceptual design of the new proton synchrotron (PS) internal dump.
New Design of Vacuum Chambers for Radiation Shield Installation at Beam Injection Area of J-PARC RCS
Authors: Kamiya J , Kotoku H. , Shobuda Y. , Takayanagi T. , Yamamoto K. , Yanagibashi T. , Horino K. , Miki N. 
Published: December 2019

Abstract
One of the issues in the J-PARC 3 GeV rapid cycling synchrotron is the high residual radiation dose around the beam injection point. A radiation shield is necessary to reduce radiation exposure of workers when maintenance is performed there. A space to install the radiation shield should be secured by newly designing a structure of the vacuum chamber at the injection point and the alumina ceramics beam pipes for the shift bump magnets. To make the space for the shield, the chamber is lengthened along the beam line and the cross-sectional shape is changed from circle to rectangle. The displacement and inner stress of the vacuum chamber due to atmospheric pressure were evaluated to be enough small by the calculation. For the ceramics beam pipe’s rf-shield, the damping resistor was effective to reduce the induced modulation voltages by the pulsed magnetic field.
Establishing A Laser Treatment To Suppress The Sec-Ondary Electron Emission
Authors: Wang Yigang , Wang Siwei , Zhu Bangle , Pei Xiangtao , Zhang Bo , Ge Xiaoqin , Wang Yong 
Published: December 2019

Abstract
Laser treatment has a significant influence on suppressing the secondary electron emission (SEE) in electron storage rings. A new synchrotron radiation light source, the Hefei Advanced Light Source(HALS), is under consideration and it has a strict requirement to suppress the SEE. In this paper, we used a laser with the wavelength of 355nm to process with copper sample. After the laser treatment, the secondary electron yield (SEY) reduces from 2.05 to 0.86. We also used the scanning electron microscope (SEM) to analysis the surface of the sample after the laser treatment. This paper reports the experiment set up and preliminary results.
Research On Secondary Electron Emission Characteristics of Diamond-Like Carbon Thin Films
Authors: Zhang Y X , Wang Y G , Ge X Q , Zhang B , Wei W , Wang S H , Zhu B L , Shao J Q , Li W M , Wang Y 
Published: December 2019

Abstract
In modern particle accelerators, the build-up of electron cloud is a main limiting factor for the achievement of high-quality beam. Among the techniques to mitigate it, coating the internal walls of the beam pipes with a thin film which has a low secondary electron yield (SEY) is considered to be one of the most effective means. From several earlier studies, it was found that diamond-like carbon (DLC) thin films are potential coatings. This paper is mainly about the research on secondary electron emission characteristics of DLC thin films. The secondary electron emission (SEE) tests were done at temperature of 298 K and vacuum pressure of 2 × 10–9 Torr. Here, we obtained the characteristics of the SEE from DLC film coatings with different thickness under ultrahigh-vacuum (UHV) conditions. The maximum secondary electron yield (SEY), δmax, of the DLC thin films under different primary electron doses were also obtained, respectively.
Impact of Flux Jumps on High-Precision Powering of Nb3Sn Superconducting Magnets
Authors: Martino Michele , Arpaia Pasquale , Ierardi Stefano 
Published: December 2019

Abstract
Nb3Sn superconducting magnets represent a technology enabler for future high-energy particle accelerators. A possible impediment, though, comes from flux jumps that, so far, could not be avoided by design unlike for NbTi technology. However, the impact of flux jumps on the magnet powering has not been properly investigated to date. Flux jumps appear during current ramps at relatively low value of current and tend to disappear towards nominal current. They are usually detected as voltage jumps between different magnet coils but they might also produce overall voltage jumps across the magnet electrical terminals. Such jumps might perturb the power converter feedback control loop and therefore potentially jeopardize its precision performance during energy ramps. This work aims at: (i) presenting preliminary experimental test results on some HL-LHC Nb3Sn model and prototype magnets, and (ii) attempting to build a simplified electrical model of the flux jumps, with focus only at its interaction with the power converter feedback control loop. Such a work is a starting point for outlining possible power converters control strategies able to minimize flux jumps impact on high-precision powering of Nb3 Sn superconducting magnets.
Upgrade of the Cryogenic Control System for SRF Modules at the Taiwan Light Source
Authors: Chung F. T. , Chang M. H. , Yu T. C. , Wang C. , Yeh M. S. , Chang F. Y. , Chen L. J. , Liu Z. K. , Chang L. H. , Lo C. H. , Li Y. T. , Chang S. W. , Lin M. C. 
Published: December 2019

Abstract
An upgrade of the cryogenic control system for superconducting radio-frequency (SRF) modules of the Taiwan Light Source (TLS) has been completed. The biggest challenge was to recover all protection and operational functions, while minimizing the quantity of vented helium from SRF modules while replacing valve controllers. Gradually, this work was finished within several one- and ten-day scheduled machine shutdown periods for accelerator maintenance. No large helium vent nor pollution of the cryogenic system occurred during all component replacements and function verifications. Functions of the cryogenic electronics were improved, whereas the valve controllers are upgraded to new versions to increase reliability and availability. Communications with the data acquisition system was also secured by buffered signal processing module so that device shutdown of the data acquisition system will not interrupt the cryogenic valve operation.
Electromagnetic design and characterization of an S-band 3-cell rf acceleration cavity
Authors: Montoya-Soto G R , Yee-Rendon B. , Duarte-Galvan C. , Valerio-Lizarraga C. A. 
Published: December 2019

Abstract
An S-Band (2998 MHz) Radio Frequency (RF) cavity to accelerate electrons was developed taking into account the beam space charge, the relativistic change in velocity of the low energy beam particle distribution through the cavity, and the emittance growth. The electromagnetic design and geometry optimization were done using the codes Poisson Superfish (PSF) and CST Studio (CST). In addition, beam dynamics simulations were done using the program Travel to optimize the emittance and take into account the space charge effect.
Commissioning of RF system of the 200 MeV proton cyclotron
Authors: Chen Gen , Liu Guang , Zhao Yanping , Peng Zhen , Zhang Xin , Chao Chujie , Long Xuyun , Yu Chuansong , Karamyshev Oleg , Karamysheva Galina , Shirkov Grigori , Caruso Antonio , Calabretta Luciano 
Published: December 2019

Abstract
The SC200 superconducting accelerator which is designed for proton therapy is currently under construction. The RF (Radio Frequency) system has been designed and constructed as a subsystem of the SC200. To verify the stability of the RF system, a high-power feeding test was performed for the cavity. This paper mainly reports on the overview of RF systems and the preliminary high-power commissioning, as well as the problems found and improvements made during the commissioning process. The results show that the RF system has initially achieved the designed goal, and each loop (amplitude, tuning, phase) can work effectively. The cavity can operate in a ~50 kW continuous wave state. Next, the formal RF conditioning will be carried out after the complete assembly of cyclotron, so as to confirm the cavity can run smoothly under 80 kW, which is part of the whole commissioning process.