COMA provides quick information about data in containers, periods, runs, and luminosity blocks, and is a tool that aggregates information from across many runs. It is a useful tool to get an overview of the configurations of streams and triggers.
To access the COMA web portal you need a valid grid
certificate in your browser and you need to be a part of
the ATLAS virtual organization (VO)
When trying to access the web portal accept any site
warnings and click
Use the COMA web portal to find out what were the data periods taken in 2017 for 13 TeV pp collisions. What happened in period E (i.e., what defines period E)?
There are likely several ways to find this answer. One way is the following:
COMA Period Menu
By project, click on
[A:N]in yellow under
You will see the listing of periods (and associated information)
for periods A to N. In period E the
Description column states:
Runs after the switch of the online release to 21.1.10
Use the COMA web portal to find the lowest pT HLT unprescaled single muon trigger throughout the 2017 pp run. What was the corresponding L1 input item?
From the main page click on
COMA Report Menu and fill in the
And click the
SUBMIT button at the bottom left.
Distinct Triggers yellow link. You’ll have to
scroll (or do a clever search) to find the answer: HLT_mu15.
The corresponding L1 input item was L1_MU11.