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Operation of the ATLAS trigger system in Run 2

Journal Article · · Journal of Instrumentation
 [1]
  1. Harvard University
+ Show Author Affiliations
The ATLAS experiment at the Large Hadron Collider employs a two-level trigger system to record data at an average rate of 1 kHz from physics collisions, starting from an initial bunch crossing rate of 40 MHz. During the LHC Run 2 (2015–2018), the ATLAS trigger system operated successfully with excellent performance and flexibility by adapting to the various run conditions encountered and has been vital for the ATLAS Run-2 physics programme. For proton-proton running, approximately 1500 individual event selections were included in a trigger menu which specified the physics signatures and selection algorithms used for the data-taking, and the allocated event rate and bandwidth. The trigger menu must reflect the physics goals for a given data collection period, taking into account the instantaneous luminosity of the LHC and limitations from the ATLAS detector readout, online processing farm, and offline storage. This document discusses the operation of the ATLAS trigger system during the nominal proton-proton data collection in Run 2 with examples of special data-taking runs. Aspects of software validation, evolution of the trigger selection algorithms during Run 2, monitoring of the trigger system and data quality as well as trigger configuration are presented.
Research Organization:
Harvard Univ., Cambridge, MA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Univ. of Oregon, Eugene, OR (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
ATLAS Collaboration; The ATLAS collaboration
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515; SC0007881; SC0017996
OSTI ID:
1684630
Alternate ID(s):
OSTI ID: 1713261
OSTI ID: 1833075
OSTI ID: 1833079
OSTI ID: 1763753
OSTI ID: 1779818
OSTI ID: 23037084
Journal Information:
Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 10 Vol. 15; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (22)

Figure 1(p. 6)figure Figure 1
Figure 2(p. 9)figure Figure 2
Figure 3(p. 10)figure Figure 3
Figure 4(p. 12)figure Figure 4
Figure 5(p. 15)figure Figure 5
Figure 6(p. 17)figure Figure 6
Table 1(p. 17)table Table 1
Figure 7(p. 18)figure Figure 7
Figure 8(p. 19)figure Figure 8
Figure 9(p. 22)figure Figure 9
Figure 10(p. 24)figure Figure 10
Figure 11(p. 25)figure Figure 11
Figure 12(p. 26)figure Figure 12
Figure 13(p. 27)figure Figure 13
Figure 14(p. 29)figure Figure 14
Table 2(p. 31)table Table 2
Figure 15(p. 33)figure Figure 15
Figure 16(p. 34)figure Figure 16
Figure 17(p. 35)figure Figure 17
Figure 18(p. 35)figure Figure 18
Figure 19(p. 38)figure Figure 19
Table 3(p. 39)table Table 3

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