Commit 98df1f01 authored by Lennart Huth's avatar Lennart Huth
Browse files

Updated the readme

parent 4f180ccd
Pipeline #2842475 failed with stages
in 13 minutes and 33 seconds
......@@ -23,6 +23,10 @@ begin = t_{trig} - (p * (115.2 / 576)) \mu s \\
end = begin + 230 \mu s
```
With an unknown probability the MIMOSA DAQ is not transmitting the correct two frames. Assuming frames t and t+1 are expected it can happen that frames t-1 and t are copied to disk.
This causes an artificial inefficiency if the above method is used and no additional timing layer is available. To overcome this issue, the option `pixelated_timing_layer` is added. If set to false, this enlarges the frames to cover the full possible timestamp range. This redduces the available statistics by a rate depenend fraction (Typically 30-40%).
It should be noted that in about 1 permille of the cases, zero triggers per event are
observed, which should in principle not be possible.
......@@ -41,7 +45,18 @@ pivot pixel is close to its roll-over.
* `shift_triggers`: Shift the trigger ID of the `detector_event_time`. This allows to correct trigger ID offsets between different devices such as the TLU and MIMOSA26. Note that if using the module `EventLoaderEUDAQ2` the same value for `shift_triggers` needs to be passed in both cases. Defaults to `0`.
* `skip_time`: Time that can be skipped at the start of a run. All events with earlier timestamps are discarded. Default is `0ms`.
* `eudaq_loglevel`: Verbosity level of the EUDAQ logger instance of the converter module. Possible options are, in decreasing severity, `USER`, `ERROR`, `WARN`, `INFO`, `EXTRA` and `DEBUG`. The default level is `ERROR`. Please note that the EUDAQ verbosity can only be changed globally, i.e. when using instances of `EventLoaderEUDAQ2` below this module, the last occurrence will determine the (global) value of this parameter.
* `add_trigger`: Option to directly add the trigger of the TLU to the event. If this option is selected, the event length is defined to be 3*115.2us - with 115.2us before the trigger timestamp and 230.4us after it. Note that no `EventLoaderEUDAQ2` for the TLU is required if this option is activated. Defaults to `false`
* `add_trigger`: Option to directly add the trigger of the TLU to the event. Note that no `EventLoaderEUDAQ2` for the TLU is required if this option is activated. Defaults to `false`
* `pixelated_timing_layer`: Define if an additional timing layer is beeing used. If so, the event length is defined as described in the text above. Defaults to `true`.
* `use_all_mimosa_hits`: Select if all hits in the two MIMOSA frames are used for analysis, or if pivot based selection is used in the converters. If set to `true`, a full frame of `math 115 \mu s` is added at to the `begin` defined above, for `false` it sets `math begin= 115\mu s`. If`pixelated_timing_layer=true` this has no effect. Should always be identical to `EventLoaderEUDAQ2` and defaults to `false`.
The following parameters are for device debugging only and typically not set manually:
* `add_begin`: Shift the begin of the event further into the past. Defaults to `0`.
* `add_end`: Shift the end of the event further into the end. Defaults to `0`.
* `pivot_min`: Minimal pivot pixel to accept frames. Defaults to `0`.
* `pivot_max`: Maximal pivot pixel to accept frames. Defaults to `576`.
In addition, parameters can be forwarded to the EUDAQ2 event converters.
Please refer to the README of the `EventLoaderEUDAQ2` for more details.
......
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