Keyword: software
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TUPA06 Study the Active Vibration Control System of the Parallel 6-DOF Platform controls, experiment, damping, synchrotron 131
  • R.H. Liu, H.Y. He, Z.Y. Ke, L. Liu, X.J. Nie, C.J. Ning, A.X. Wang, Y.J. Yu, D.H. Zhu
    IHEP CSNS, Guangdong Province, People’s Republic of China
  • L. Kang, J.S. Zhang
    IHEP, Beijing, People’s Republic of China
  • G.Y. Wang
    Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China
  Funding: National Natural Science Foundation of China 11905231
With the development of high-energy synchrotron radiation light source with high energy, high brightness, low emittance and nano-scale light spot, accelerators and beamline stations have higher requirements for the stability of the system, and active vibration isolation technology has been paid more and more attention. It has become the key technology for the development of major scientific devices (such as high-energy synchrotron radiation light source, free electron laser, etc.) in the future. In this paper, an active vibration control system driven by piezoelectric ceramic actuator with strong adaptability is designed. NI Compact-RIO real-time control system and Fx-LMS adaptive filter control algorithm are used for the active vibration control system. The identification method of input and output channels and the active control module are simulated by MATLAB. And an active vibration control system based on a parallel 6-DOF platform was built for experimental verification. The experimental results show that the designed active vibration control system has a good control effect for low-frequency micro-vibration.
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About • paper received ※ 11 July 2021       paper accepted ※ 14 October 2021       issue date ※ 27 October 2021  
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TUPB11 Cryogenics Monitoring and Control System for EMBL Facilities at PETRA III cryogenics, controls, EPICS, status 167
  • M. Bueno, S. Fiedler, L. Kolwicz-Chodak, J. Meyer, U. Ristau
    EMBL, Hamburg, Germany
  At the integrated facility for structural biology of the EMBL at PETRA III on the DESY campus in Hamburg, several devices need cryogenic cooling with liquid nitrogen (LN2): cryo-coolers for the DCMs, cold gas stream units for cryo-crystallography (cryo-stream) at the beamlines and for an automatic crystal harvesting system, robotic sample mounting systems at the beamlines (MARVINs) and an additional one for sample transfer from the automatic crystal harvesting system. The cryo-coolers and phase separator are connected to the central LN2 supply operated by DESY. A local LN2 phase separator installed above one the beamlines is supplying the cryo-streams, the MARVIN systems and LN2 emergency reservoir. For the cryogenic devices local servers and clients exist that monitor and operate the corresponding sensors, actuators and provide the safety logic. In addition, the local cryo-clients are integrated in a cryogenics supervision client. The supervision client allows password protected access at a monitoring level, an operator and an expert level. At the monitoring level, it offers a fast overview of the status of all sub-systems at one glance. At the higher access levels, also the control of the cryogenic sub-systems is accessible. The application can be used from remote via a VPN connection, TeamViewer software or a web client (in preparation). Because of the heterogeneity of the cryogenic devices different protocols such as TINE, EtherCAT, ADS-OCX (BECKHOFF Automation) and EPICS for interfacing had to be applied.  
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About • paper received ※ 29 July 2021       paper accepted ※ 27 September 2021       issue date ※ 03 November 2021  
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TUPC02 Bringing the Ground Up (When Is Two Less Than One?) optics, site, photon, distributed 182
  • A.A. Khan, C.A. Preissner
    ANL, Lemont, Illinois, USA
  Funding: Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility, operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
The Advanced Photon Source Upgrade project has employed the use of high heat load dual mirror systems in the new feature beamlines being built. Due to the shallow operating angles of the mirrors at a particular beamline, XPCS, the two mirrors needed to be approximately 2.5 m apart to create a distinct offset. Two separate mirror tanks are used for this system. However, it is unclear if the vibrational performance of these tanks would be better if they were both mounted on one large plinth or each mounted on a small plinth. Using accelerometers at the installation location, the floor vibrations were measured. The resulting frequency response function was then imported into a Finite Element Analysis software to generate a harmonic response analysis. The two different plinth schemes were modeled and the floor vibration was introduced as an excitation to the analysis. The relative pitch angle (THETA Y) between the mirrors was evaluated as well as the relative gap between the mirrors (XMAG). Results showed that a single plinth reduces the relative XMAG (RMS) compared to two plinths by approximately 25%. However, the relative THETA Y (RMS), which is arguably more critical, is significantly lower by approximately 99.7% in two plinths when compared to a single plinth. Therefore, it is more effective to use two separate plinths over a longer distance as opposed to a single longer granite plinth.
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About • paper received ※ 23 July 2021       paper accepted ※ 15 October 2021       issue date ※ 10 November 2021  
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WEPA06 The Beamline Motor Control System of Taiwan Photon Source controls, vacuum, operation, experiment 232
  • C.F. Chang, C.Y. Liu
    NSRRC, Hsinchu, Taiwan
  Different experiments have different features, so does the optical design; however, all of them are necessary to be adjusted according to mechanism. For example, adjusting mechanism of optical element is often based on stepper motor, for stepper motor possesses high resolution ability, which can adjust mechanism to precise location. This study illustrates how motor system of our Taiwan Photon Source integrates adjusting mechanisms of stepper motor on beamline. In addition, the firmware of close-loop system is cooperated to further improve veracity of location.  
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About • paper received ※ 05 July 2021       paper accepted ※ 19 October 2021       issue date ※ 27 October 2021  
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WEPA08 Investigating of EBW Process Weldment Connections Stresses in ILSF 100 MHz Cavity by Simufact. Welding Software cavity, electron, vacuum, simulation 239
  • V. Moradi
    ILSF, Tehran, Iran
  • A. Adamian, N.B. Arab
    PPRC, Tehran, Iran
  The cavity is one of the main components of all accelerators, which is used to increase the energy level of charged particles (electrons, protons, etc.). The cavities increase the energy level of the charged particle by providing a suitable electric field to accelerate the charged particle. Here, information about electron beam welding analysis in 100 MHz cavities of ILSF design will be explained. According to studies performed in most accelerators in the world, connections in cavities are made by various methods such as explosive welding, brazing, electron beam welding, etc. Many articles on large cavities state that the connection of the side doors must be done by the electron beam welding process. However, in the present paper, the three-dimensional model of the cavity is imported into Simufact. Welding software after simplification and mesh process was done, and then the heat source of electron beam welding and other welding factors such as beam power, Gaussian distribution, etc. are applied in the software. The purpose of this study is the number of residual stresses during the EBW process in the 100 MHz cavity of ILSF.  
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About • paper received ※ 21 July 2021       paper accepted ※ 19 October 2021       issue date ※ 02 November 2021  
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