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.
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 | 4760 | 54.3 |
+ 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 | 488 | 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 | 808 | 9.2 |
o shutdown | 1920 | 21.9 | 1976 | 22.9 | 1936 | 22.1 | 2024 | 23.1 | 2448 | 27.9 | 2072 | 23.7 | 2248 | 25.7 | 4000 | 45.7 |
o downtimes at user operation | 25 | 30 | 44 | 32 | 39 | 29 | 50 | |||||||||
+ 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% | ||
+ 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% | ||
Total beam integral | 2497 Ah | 2528 Ah | 2560 Ah | 2512 Ah | 2315 Ah | 2472 Ah | 2373 Ah | |||||||||
Availability | 99.1% | 98.7% | 99.1% | 99.2% | 98.0% | 99.3% | 97.4% | |||||||||
Availability after Compensation | 102.4% | 102.5% | 102.2% | 102.4% | 101.1% | 102.2% | 99.3% | |||||||||
MTBF | 193.0 h | 162.8 h | 114.3 h | 153.2 h | 116.3 h | 166.9 h | 97.3 h | |||||||||
MTTR | 1.8 h | 2.1 h | 1.1 h | 1.3 h | 2.5 h | 1.3 h | 2.6 h | |||||||||
MTBD | 67 h | 42 h | 59 h | 31 h | 26 h | 36 h | 27.3 h |