11 CTP Training A.Jusko, M. Krivda and R.Lietava.

22 Outlook Introduction Basic Concepts Control Configuration Monitoring

33 LHC Basics 2 rings protons/ions are in bunches protons’ velocity ~ speed of light bunches are separated 7.5 m in space 25ns in time = 40 MHz LHC clock – 40 MHz Interaction Point (IP): crossing of rings ORBIT 1 full round ~ 89 microsecs 3564 bunches Bunch Crossing (BC): crossing of two bunches in IP LHC filling scheme: how many bunches are injected their position in the ORBIT

44 Central Trigger Processor LTU TTC CTP input FERO Read Out Electronics Trigger Electronics What is trigger? Detector DAQDAQ Detector Data OFFLINEOFFLINE DataESD Physicists BUSY LHC clock

55 Basic Concepts CTP – Central Trigger Processor LTU - Local Trigger Unit DAQ – Data Acquisition system ECS – Experiment Control System TTC – Trigger and Timing Control FERO – Front End Read Out electronics Global run –Detector fully in ECS control –CTP provides triggers Standalone run –Detector in local control (e.g. testing)

66 CTP control Central Trigger Processor LTU TTC CTP input FERO Read Out Electronics Trigger Electronics DetectorBUSY LHC clock Computer programs controls trigger hardware ltuproxyctpproxymiclock ECS

77 CPUs layout in P2

88 Basic Concepts Detector: –V0, TPC, SPD Trigger Cluster = Group of detectors to be read out togeteher CTP Input or Trigger Input: –Fast binary signal from detector 0VBA, 0VBC, 0SMB –Internal CTP or DAQ generators used in technical runs Trigger Descriptor = Logical Function of CTP inputs –defines physics to be taken by a class –D0VBA 0VBA –DINT7 0VBA 0VBC 0SMB (logical and of inputs) –L0 function l0fINT1 0VBA | 0VBC | 0SMB Trigger Class = Descriptor + Cluster

99 Naming Conventions Input names n n = 0,1,2 (trigger level) Descriptor starts with D Class starts with C

10 ALL SPD SDD SSD TPC TRD TOF HMPID PHOS MUON_TRK MUON_TRG FMD T0 V0 ZDC ACORDE EMCal CTP configuration ALLNOTRD SPD SDD SSD TPC TOF HMPID PHOS MUON_TRK MUON_TRG FMD T0 V0ZDC ACORDE EMCal MUON SPD MUON_TRK MUON_TRG FMD T0 V0l DINT7 0VBA & 0VBC DINT7WU 0VBA & 0VBC & 0HWU DMUS7 0VBA & 0VBC & 0MSL DEMC7WU 0VBA & 0VBC & 0HWU & 0EMC DEMC7 0VBA & 0VBC & 0EMC DMUSH7 0VBA & 0VBC & 0MSH Descriptors Clusters Class CINT7WU Class CEMC7WU Class CINT7 Class CEMC7 Class CMUS7 Class CMUSH7 Classes

11 Bunch Crossing mask (BC Mask): –CTP can choose in which bunches in ORBIT to allow triggers Downscaling: –CTP can reduce trigger rate of classes with high rate Downscale factor DS Assigning group of classes (CG) time windows Calibration trigger: –CTP can send special software triggers used for detector calibration –Fully automatic, but need to be monitored Configuration II Trigger Class = Descriptor + Cluster + BCMask + DS + CG

12 Control Configuration Monitoring DAQlogbook (monitoring): –CTP configuration –Input rates –Class rates Alice Configuration Tool (ACT) (configuration) CTP web (monitoring): –Global Run Busy status –CTP and LTU counters InfoBrowser (configuration): SMAQ Command line (configuration,monitoring)

13 DAQlogbook Accesible from any web bowser: –alice-logbook.cern.ch/logbook/ Logging any action –Log your action –Find actions of other people Information of every run ever taken in ALICE Information on current run Run info

14 DAQlogbook-Logbook

15 DAQlogbook-Runs

16 DAQlogbook-Run Details

17 DAQlogbook Trigger Info

18 Class Rates

19 Configuration

20 CTP configuration in logbook

21 Alice Configuration Tool Accessible from any web bowser: –alice-logbook.cern.ch/act Keeps alice configurations –CTP –Partition

22 ACT Main

23 ACT CTP

24 ACT Partition

25 Info Browser Accessible from CERN general network All info messages related to run/detector/system Most common usage: find the errors during runs and check if they are related to CTP

26 Info for run

27 Info for TRG(CTP) and PHYSICS_1

28 CTP web and Command line Trigger oncall account –Internal alice network. NOT possible to login from outside –from ARC: Trigger account ‘sshs’ or ‘ssh –X at arc27 –From Outside: login to CERN General network Login to –lxplus –cerntsnew.cern.ch remotedesktop to alidcswn001 xwin (or putty) to alidcscom707

29 CTP web Web : –BUSY status –CTP/LTU counters –Shifter tasks (to be updated) –Ltuproxy status (to be fixed)

30

31 Global Run Busy status/Input rates Big Screen

32 CTP counters

33 CTP counters

34 LTU status

35 SsM data AQuisition Machine alidcscom027

36 Full ORBIT SMAQ

37 SMAQ – zoomed plot

38 Next Step Register with DCS for access to alidcsgw001 –Contact Cc: ACT ? Daqgw-tools

39 Class Rates and Ratios Big Screen

40 CTP Data Quality Monitoring (DQM)

41 DQM

42 DQM

43 LTU proxy status Check ltu proxy status Inform shift leader if some detector’s proxy not running

44 Sources

45 CTP context

46 CTP Control and Configuration

47 LHC clock - miclock ALICE clock change from LOCAL -> BEAM1 during PREPARE RAMP miclock running at alidcscom188 when started set to mode auto change to manual ‘man’ if asked by shift leader or expert