0428同步年報-2021-全

090 ACTIVITY REPORT 2021 Status of Taiwan Light Source and Taiwan Photon Source Accelerators Taiwan Light Source (TLS) Machine Parameters of the TLS The TLS accelerator is a compact synchrotron light source with nine conventional and superconducting insertion devices, and it has served users for 27 years. The TLS accelerator features top-up injection, superconductivity radio frequency (RF) module operation, and modern feedback technology. Table 1 lists the major parameters of the TLS storage ring for current operations, Fig. 1 illustrates the locations of the insertion devices, and Table 2 lists the related parameters. Beam energy (GeV) 1.5 Number of buckets 200 Current (mA) 360 Horizontal emittance (nm-rad) 22 Vertical emittance (pm-rad) 88 Tunes (ν x /ν y ) 7.303/4.175 RF voltage (MV) 1.6 Lifetime (hour) 7.5 W200 U50 U90 EPU56 SWLS SW60 IASWA IASWB IASWC Type Hybrid Hybrid Hybrid Pure SC SC SC SC SC Period length (mm) 200 50 90 56 250 60 61 61 61 Photon energy (eV) 800−15k 60−1.5k 5−500 80−1.4k 2k−38k 5k−20k 5k−20k 5k−23k 5k−20k Table 1 : Main parameters of TLS storage ring. Table 2 : Main parameters of insertion devices in the TLS. Fig. 1 : Layout of the TLS accelerator. Statistics of TLS Machine Operation After 200-mA top-up injection operations started in October 2005 following the installation of a superconducting radio frequency module, the TLS gradually increased the stored beam current, which reached 360 mA in 2010. The performance indicators for TLS operations from 2011 to 2021 are presented in Fig. 2 , in which availability is defined as the ratio of