0428同步年報-2021-全

Facility Status 111 test and will be installed on site in March 2022. In addition, a safety interlock system was set up in December 2021. All beamline optics will be installed in April 2022 for a further commissioning stage. The construction work of TPS 39A1 µARPES branch was led by Den-Sung Lin (National Tsing Hua University) and NSRRC teams. The endstation was assembled in early 2018 and test began at the end of 2018. Because the µARPES endstation was constructed earlier than the beamline construction and there was a serious delay of shipment of beamline optics, a reshaped work of the µARPES endstation was carried out to optimize the experimental efficiency. The major concepts of reshaped µARPES endstation should obey safety guidelines, but also maintain high efficiency in taking data. The design of the reshaped endstation was completed in April 2021. Figure 1(a) displays the design of the reshaped µARPES endstation, located at port 39 of the TPS. A 2D-VLEED spin detector was equipped with the endstation for spin-resolved ARPES. A Scienta DA30L energy analyser with deflection mode and a six-axis low- temperature manipulator developed by the NSRRC can satisfy effectively the request of Fermi-surface mapping. A large area platform with a solid guard rail can avoid Fig. 2 : Design of zone plate, OSA and sample stages in nanoARPES branch. possible accident effectively during experiments. The reshaped µARPES endstation was assembled in November 2021, as shown in Fig. 1(b) . The overall system will be installed on site after completing beamline construction in April 2022. The commissioning work will be conducted after May 2022. The endstation will be partially opened to users at the end of 2022.This novel endstation can allow users to conduct spin-resolved ARPES and conventional ARPES in the near future. For the TPS 39A2 nanoARPES branch, the design of all scanning stages including zone plate, order-sorting aperture (OSA) and sample stage was finished in July 2020. Figure 2 exhibits the final design of the whole system. All stages were delivered and assembly began in June 2021. The integration of motors and analyser will be completed in April 2022. The mu-metal chamber was shipped to NSRRC in December 2021. The functional test of zone plate stages will be done in June 2022. The assembly of the entire system including chamber, analyser and all stages will be done in August 2022.