SLS Operation Statistics

The following picture shows the main figures of the operation statistics for the SLS. More detailed information can be found in the yearly operation reports.

SLS operation statistics 2017 to 2023

Here are our definitions:

  • Downtime: time between beam loss (Ibeam < 20mA) and full recovery (Ibeam >= Inominal = 400 mA).
  • Short-uptime-rule: if two beam outages have less than 1 hour of uptime in between, it is counted as one long downtime.
  • Scheduled-user-time: this time is distributed between the accepted user proposals
  • Scheduled-user-reserve-time: additional user time, provided to compensate beam outages (introduced 2004)
  • User-Time: Scheduled-user-time + Scheduled-user-reserve-time
  • Delivered-beam-time: User-Time - Downtime
  • Total-downtime: Sum over all individual Downtime of one year
  • Number-of-faults: Count of all individual Downtimes
  • Number-of-distortion = Incidence count of Downtimes, beam drops and orbit feedback failures
  • Availability: Delivered-beam-time / User-Time.
  • Availability after compensation: Delivered-beam-time / Scheduled-user-time.
  • MTBF: Mean Time Between Failures = User-Time / (Number-of-faults + 1)
  • MTTR: Mean Time To Recover = Total-downtime / Number-of-faults
  • MTBD: Mean Time Between Distortions = User Time / Number-of-distortion

The tables below show the detailed statistics for the operation of the SLS in the past years.
 

Beam Time Statistics 2016 2017 2018 2019 2020 2021 2022 2023
Swiss Light Source [h] [%] [h] [%] [h] [%] [h] [%] [h] [%] [h] [%] [h] [%] [h] [%]
o total beam time 6864 78.1 6784 77.4 6824 77.9 6736 76.9 6336 72.1 6688 76.3 6512 74.3 4872 55.6
 + user operation 5016 57.1 5048 57.6 5144 58.7 5056 57.7 4672 53.2 5008 57.2 4960 56.6 3504 40.0
    - incl. compensation time 160 1.8 184 2.1 160 1.8 160 1.8 144 1.6 144 1.6 96 1.1 72 0.8
 + beamline commissioning 800 9.1 792 9.0 840 9.6 760 8.7 760 8.7 728 8.3 744 8.5 448 5.1
 + setup & beam development 1048 11.9 944 10.8 840 9.6 920 10.5 904 10.3 952 10.9 680 7.6 920 10.5
o shutdown 1920 21.9 1976 22.9 1936 22.1 2024 23.1 2448 27.9 2072 23.7 2248 25.7 3888 44.4
o downtimes at user operation 25 30 44 32 39 29 50 36
 + unscheduled outage 45 h 0.9% 63 h 1.3% 49 h 0.9% 42 h 0.8% 96 h 2.1% 37 h 0.7% 127.6 h 2.6% 270 h 8.0%
 + injector outage (non top-up) 1 h 0.0% 1 h 0.0% 3 h 0.1% 6 h 0.1% 26 h 0.6% 17 h 0.3% 13 0.2% 11 h 0.3%
Total beam integral 2497 Ah 2528 Ah 2560 Ah 2512 Ah 2315 Ah 2472 Ah 2373 Ah 1570 Ah
Availability 99.1% 98.7% 99.1% 99.2% 98.0% 99.3% 97.4% 92.3%
Availability after Compensation 102.4% 102.5% 102.2% 102.4% 101.1% 102.2% 99.3% 94.7%
MTBF 193.0 h 162.8 h 114.3 h 153.2 h 116.3 h 166.9 h 97.3 h 91.6 h
MTTR 1.8 h 2.1 h 1.1 h 1.3 h 2.5 h 1.3 h 2.6 h 7.5 h
MTBD 67 h 42 h 59 h 31 h 26 h 36 h 27 h 19 h