The Run Query tool provides detailed run-level information for the real data. It is particularly useful for detector and operation tasks, when you are trying to understand the LHC and ATLAS detector conditions and settings. You can use the search query either on the web interface or using the command line. On the web interface there are links to more expert pages for exact details on certain topics.
Use the Run Query web interface to get the Data Summary Total Luminosity plots (vs day) for the entire 2017 and 2018 13 TeV pp datasets.
To find the figures look in the top right corner of the main run query
page https://atlas-runquery.cern.ch/
in the grey band with white lettering, for the subject Data Summary
.
Click on that link which will take you to a new page. To change the year
or data-type click on the subject Data Set
in the top right corner.
These types of figures are shown very regularly in a diverse set of meetings, so it is nice to understand how to find them!
Use the Run Query web interface to find which luminosity blocks had stable beams in Run 325558.
In the Run Query search field use the query: find run 325558 / show all
When the search is complete, scroll down to see the run and all the information associated to the run. Under the main column “LHC and online luminosity information” you will see a sub-column called “Stable beams”. Below that column there is a list of luminosity block (LB) ranges with the following information:
LB 1-114: FALSE
LB 115-510 TRUE
LB 511-603 FALSE
From this information, you can see that the luminosity blocks 115-510 were labeled as stable beams.
Bonus question: What is required for stable beams to be declared?
You may need to investigate and correlate trigger rates with LHC conditions, such as when stable beams were declared.
Use the Run Query web interface to help you find the information about run 335302:
HLT_g60_loose
during
luminosity blocks 257-268?In the Run Query search field use the query: find run 335302 / show all
and search for the information in the table.
The date can be seen under the column labeled Start and endtime
:
The period can be seen under the column labeled Run
:
Under the column “Trigger information: Prescale key”, click on the luminosity block range of interest:
This will take you to a new page where you can find the prescale for
trigger HLT_g60_loose
. During that time, it was 1359.0.