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In 2018 the high energy X-ray beamlines P07[1] and P21b[2] at DESY’s storage ring PETRA III received new undulators. The two identical devices were built by an industry collaboration of Research Instruments GmbH and Kyma S.p.A. according to DESY’s specifications. They have a magnetic length of 4 m, a period length of 21.2 mm and a deflection parameter K of 1.41 at a gap of 7.0 mm. We report about experience during magnet tuning, the final acceptance measurements and the commissioning in the accelerator tunnel.

SAPOTI (Scanning Analysis by PtychO for Tomographic Imaging) will be the second nanoprobe to be installed at the CARNAÚBA (Coherent X-Ray Nanoprobe Beamline) beamline at the 4th-generation light source Sirius at the Brazilian Synchrotron Light Laboratory (LNLS). Working in the energy range from 2.05 to 15 keV, it has been designed for simultaneous multi-analytical X-ray techniques, including absorption, diffraction, spectroscopy, fluorescence and luminescence, and imaging in 2D and 3D. Highly-stable fully-coherent beam sizes between 35 and 140 nm, with monochromatic flux up to 10 11 ph/s/100-mA/0.01%BW, are expected with an achromatic KB (Kirkpatrick-Baez) focusing optics, whereas a new in-vacuum high-dynamic cryogenic sample stage has been developed aiming at single-nanometer resolution images via high-performance 2D mapping and tomography. This work reports the final assembly and integration of the station in a cleanroom at the LNLS. The results include: vacuum, thermal, dynamic and motion validations; metrology-assisted alignment procedures; implementation of automated and interlocked sample loading; evaluation and optimization of high-performance positioning and scanning capabilities; and integration to the EPICS control system. Technical commissioning at the beamline is expected shortly after moving the station from the cleanroom to the experimental hutch by the end of 2024.

Spatiotemporal characteristics of runaway electrons (REs) have been investigated in the integrated commissioning of the largest superconducting tokamak, JT-60SA. Since the bulk ion species of the plasma were only H or He in the integrated commissioning, no fusion neutrons were produced. RE losses were detected with neutron flux monitors (NFMs) through measurement of photoneutrons originating from REs hitting plasma facing components (PFCs). REs are found to be generated and lost in the case when the plasma density is low, when the plasma hits the wall, or when MHD modes were present. In the latter two cases, the plasma was disruptive. In addition, poloidal locality of the RE loss on the PFCs is confirmed based on a magnitude relation of the NFM signals.

The Soft X-ray Free Electron Laser ATHOS at SwissFEL came into operation at the end of 2019 together with a variable line space grating monochromator. The beamline alternatively distributes the FEL-beam to two end stations namely Maloja and Furka. A third end station, Diavolezza, is currently under construction and will be available in 2026. This article presents the current status of the beamline instrumentation and first commissioning results in the Maloja and Furka branches.

A new 3-GeV synchrotron light source, NanoTerasu, started user service in April 2024 to provide highly brilliant soft to tender X-rays as complementary partner of SPring-8 which mainly covers hard X-rays in Japanese photon science platform. The present maximum stored current is 200 mA at top-up mode with current fluctuation of 0.5%. The horizontal and vertical emittances are roughly 1.1 nm.rad and 0.02 nm.rad, respectively, with 200 mA. More than 1,500 hours of scheduled user time were performed by August 2024 with high beam availability of 99.5% and long mean time between failures (MTBF) of 220 hours. The first phase 10 beamlines (BLs) are composed of two multi-pole-wiggler (MPW) BLs for hard X-rays, two in-vacuum undulator BLs for tender X-rays and five APPLE-II undulator BLs and a twin helical undulator BL for EUV and SX regions. The seven BLs are in operation for users for various experiments such as imaging and three BLs are under commissioning. This paper describes commissioning and user operation status of NanoTerasu accelerator system.

miniBELEN-10A is a modular and transportable moderated neutron counter with a nearly flat detection efficiency up to 8 MeV. The detector was designed to carry out measurements of (α, n ) reactions in the context of the Measurement of Alpha Neutron Yields (MANY) project. In this work we present the results of the commissioning of miniBELEN-10A using the relatively well-known thick-target neutron yields from 27 Al(α, n ) 30 P.

Superconducting (SC) tokamak JT-60SA plays an essential role in fusion research and development by supporting and complementing the ITER project, providing directions to the DEMO design activity and fostering next generation scientists and engineers. Since the short circuit incident at the terminal joints of equilibrium field coil #1 during the integrated commissioning (IC) in March 2021, both EU and JA implementing agencies (IAs) have examined how to ensure safe operation of JT-60SA by mitigating the risk of possible discharge occurrence inside the cryostat. Based on the experience of the global Paschen tests, the IAs have established a strategy of risk mitigation measures, which is a combination of (i) reinforcement of insulation, (ii) avoiding unnecessary voltage application to the coil systems and (iii) immediate de-energization of the coils when deteriorated vacuum conditions are detected. Thanks to the considerable efforts of the Integrated Project Team members, the IC restarted in May 2023. After confirmation of the SC state of the coil systems (TF, EF and CS), the coil energization test and the plasma operation phase 1 (OP-1) started. The first plasma was successfully achieved on 23 October 2023 with a limited value of voltage and current applied to the coils. The plasma configuration control was also confirmed with low plasma current and low auxiliary heating power conditions. Based on the IO–F4E–QST collaboration, activities of JT-60SA have been shared with the IO and provided an important lesson for ITER assembly and commissioning, and will provide an outstanding contribution to fusion research at large. After OP-1, maintenance & enhancement phase 1 (M/E-1) starts from January 2024, in which in-vessel components are installed, and heating and diagnostic systems are extensively upgraded to allow a high power heating experiment planned in OP-2. In order to make the best use of JT-60SA, a newly organized JT-60SA experiment team will refine the research plan for the future high heating power operation phase.

The process of complex product assembly-commissioning has the characteristics of high flexibility and firm dynamics. To overcome the drawbacks of manual assembly, deploying automated and intelligent techniques can greatly boost efficiency, improve flexibility, and enhance the quality control. The human–robot collaborative (HRC) technology combines the advantages of human capabilities and the efficiency and precision of robots. However, current HRC technology lacks of perception and cognitive ability, especially in dynamic environments. Therefore, this paper proposed a digital twin-driven HRC assembly-commissioning framework. In this framework, a virtual-physical mapping environment for HRC is constructed. In order to improve the cognitive ability of robot units to tasks, a motion intention recognition approach is proposed which integrates the feature of part into human joint sequences. To improve the adaptability of the robot unit to tasks, the assembly-commissioning task knowledge graph is developed to extract the action sequence of the robot unit in a timely manner. Moreover, the deep deterministic policy gradient (DDPG) is used to adaptively adjust the robot unit movement path in the process of assembly-commissioning. Finally, the effectiveness of the proposed method is verified by taking a particular type of automobile generator as a case study product.