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91 lines
4.4 KiB
Markdown
91 lines
4.4 KiB
Markdown
---
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title: SLS Operation Statistics
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description: Weekly and anual operation statistics for the SLS are given here
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template: main.html
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hide:
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- toc
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---
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## Infos
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<!-- based on old definition Andreas published at http://gfa-operation.intranet.psi.ch/kr/sls/sls_opstat.php
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Here are our definitions:
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Downtime: time between beam loss (Ibeam < 20mA) and full recovery (Ibeam >= Inominal = 400 mA).
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Short-uptime-rule: if two beam outages have less than 1 hour of uptime in between, it is counted as one long downtime.
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Scheduled-user-time: this time is distributed between the accepted user proposals
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Scheduled-user-reserve-time: additional user time, provided to compensate for beam outages
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User-Time: Scheduled-user-time + Scheduled-user-reserve-time
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Delivered-beam-time: User-Time - Downtime
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Total-downtime: Sum over all individual Downtime of one year
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Number-of-faults: Count of all individual Downtimes
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Number-of-distortion = Incidence count of Downtimes, beam drops and orbit feedback failures (introduced 2004)
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Availability: Delivered-beam-time / User-Time.
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Availability after compensation: Delivered-beam-time / Scheduled-user-time.
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MTBF: Mean Time Between Failures = User-Time / (Number-of-faults + 1)
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MTTR: Mean Time To Recover = Total-downtime / Number-of-faults
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MTBD: Mean Time Between Distortions = User Time / Number-of-distortion
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-->
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Here an overview of the used definitions for the presented statistics:
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* **Scheduled-user-time:** this time is scheduled upfront and distributed between the accepted user proposals
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* **Reserve-time:** additional user time, provided to compensate for beam outages (often scheduled mid and end of year, not always used for user operation)
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* **User-operation:** Scheduled-user-time + Reserve-time
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* **Downtime:** time between beam loss (Ibeam < 20 mA) and full recovery (Ibeam >= Inominal = 400 mA) during user-operation
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* **Short-uptime-rule:** if two beam outages have less than 1 hour of uptime in between, it is counted as one long downtime.
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* **Total-downtime:** Sum of all individual downtimes of one year
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* **Total-beam-time** Sum of all scheduled beam times (user, beamline, machine, ...)
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* **Machine development** Sum of scheduled beam times (user, beamline, machine, ...)
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* **Delivered-beam-time:** User-operation - Total-downtime
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* **Number-of-faults:** Incidence count of all individual Downtimes
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* **Number-of-distortions:** Incidence count of faults and beam drops (Ibeam < 390 mA), orbit feedback failures, low beam-lifetimes (tau < 8 hours), beam blow ups (sigy > 15 um) and distorted filling patterns
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* **Availability:** Delivered-beam-time / User-operation
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* **Availability after compensation:** Delivered-beam-time / Scheduled-user-time.
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* **MTBF:** Mean Time Between Failures = User-Time / (Number-of-faults + 1)
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* **MTTR:** Mean Time To Recover = Total-downtime / Number-of-faults
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* **MTBD:** Mean Time Between Distortions = User Time / Number-of-distortion
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More information is available in [Phys. Rev. Accel. Beams 19, 082802](https://doi.org/10.1103/PhysRevAccelBeams.19.082802) and [here](http://gfa-operation.intranet.psi.ch/kr/sls/sls_opstat.php).
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## 2025
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### DUO Schedule
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| **Time** | **Hours** | **%** |
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| :- | :- | :- |
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| Scheduled-user-time | 912 | 10.5 |
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| Reserve-time | 48 | 0.5 |
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| **User operation** | **960** | **11.0** |
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| **Time** | **Hours** | **%** |
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| :- | :- | :- |
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| User operation | 960 | 11.0 |
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| Beamline development | 1824 | 20.8 |
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| Machine development | 3192 | 36.4 |
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| **Total beam time** | **5976** | **68.2** |
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| **Time** | **Hours** | **%** |
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| :- | :- | :- |
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| Total beam time | 5976 | 68.2 |
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| Shutdown | 2784 | 31.8 |
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| **Total** | **8760** | **100.0** |
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### Delivery for total beam time
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| <!-- --> | <!-- --> |
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| :- | :- |
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| Average beam current | 299 mA |
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| Circulating beam dose | 1590 Ah |
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| Injected charge | 659.3 μC |
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### Delivery for user opreation
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| <!-- --> | <!-- --> |
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| :- | :- |
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| Total downtime | 54.1 hours |
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| Number-of-faults | 49 |
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| Availability | 94.4 % |
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| Availability after compensation | 99.3 % |
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| MTBF | 18.1 hours |
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| MTTR | 1.1 hours | |