Latifa Elouadrhiri Jefferson Lab First Experiment Ready for Science Priorities and Path for CLAS12 Commissioning Latifa Elouadrhiri Jefferson Lab CLAS12 First Experiment Workshop CLAS Collaboration October 3, 2017

CLAS12 Hall B Equipment MM CND FT RICH Forward Detector (FD) TORUS magnet HT Cherenkov Counter Drift chamber system LT Cherenkov Counter Forward ToF System Pre-shower calorimeter E.M. calorimeter Forward Tagger RICH detector Central Detector (CD) Solenoid magnet Silicon Vertex Tracker Central Time-of-Flight Central Neutron Det. - MicroMegas Beamline Photon Tagger Shielding Polarized Targets MM CND FT RICH Number of readout channels : 111, 832

First Experiment- Run Group A Proposal Physics Contact Rating Days Group New equipment Energy Run Group Target E12-06-108 Hard exclusive electro-production of π0, η Stoler B 80 139 RICH (1 sector) Forward tagger 11 A F. Sabatié liquid H2 E12-06-108A Exclusive N*->KY Studies with CLAS12 Carman (60) E12-06-108B Transition Form Factor of the η’ Meson with CLAS12 Kunkel (80) E12-06-112 Proton’s quark dynamics in SIDIS pion production Avakian 60 E12-06-112A Semi-inclusive Λ productiuon in target fragmentation region Mirazita E12-06-112B Colinear nucleon structure at twist-3 Pisano E12-06-119(a) Deeply Virtual Compton Scattering Sabatie E12-09-003 Excitation of nucleon resonances at high Q2 Gothe B+ 40 E12-11-005 Hadron spectroscopy with forward tagger Battaglieri A- 119 E12-11-005A Photoproduction of the very strangest baryon Guo (120) E12-12-001 Timelike Compton Scatt. & J/ψ production in e+e- Nadel-Turonski 120 E12-12-001A J/ψ Photoproduction & study of LHCb pentaquarks Stepanyan E12-12-007 Exclusive φ meson electroproduction with CLAS12 Stoler, Weiss Beam time partial sum 559 (1,049) Experiment ending with A or B are run group experiments approved by the CLAS collaboration. They are running parallel to the experiments with same experiment number. Experiments ending with (a) and (b) take data with both run groups.

CLAS12 First Experiment Configuration Duration: 139 days 20 days commissioning 60 days high luminosity (1035cm-2s-1) 39 days low luminosity (5x1033cm-2s-1) 20 days torus polarity = negative Energy: 11 GeV Target: LH2 Experiment parameters Beam energy 10.6 GeV, electrons polarized Beam current 4nA (5x 1033) to 80 nA (1x1035) Torus field and polarity 100% (negative particles in-bending) Solenoid field and polarity 100% (nominal) Trigger(s) Electron trigger (HTCC/PCAL/EC) Electron (1 - 5 GeV) in the FT and ≥ 2 (3) hadrons in CLAS12 Target 5cm LH2

CLAS12 Components for First Experiment Torus magnet - to be operated up to ±100% of design current Solenoid magnet – to be operated up to 100% of design current Forward Detector (FD) – High Threshold Cherenkov Counter (HTCC), Forward Micromegas Tracker (FMT), Drift Chamber system (DC -R1, R2, R3), Low Threshold Cherenkov Counter (LTCC, 1 sector), RICH (1 sector), Forward Time-of-Flight (FTOF 1b/1a), Preshower Calorimeter (PCAL), Electromagnetic Calorimeter (EC) Forward Tagger (FT) – FT-calorimeter, FT-Hodoscope, FT-Tracker Central Detector (CD) – Silicon Vertex Tracker (SVT), Barrel MicroMegas Tracker (BMT), Central Time-of-Flight (CTOF) (being Installed), Central Neutron Detector (CND) Slow Controls DAQ/Online computing Trigger Beamline equipment Offline Software

Beamline Configurations “FT ON” “FT OFF”

DC Region 1 occupancy versus solenoid field FT: ON FT: OFF

Beamline/detector configurations that are relevant “FT ON” “FT OFF” CLAS12 configuration for spring 2017 Run

Schedule Run Schedule: Hall B is scheduled for an Commissioning /Engineering Run for a total of 30 calendar days beginning December 4, 2017, and ending January 28, 2018. First Experiment is scheduled to begin February 5. There are 8 days of no-beam built into the schedule that can be used to implement changes to CLAS12 components if needed (for example as a result of findings during the engineering run).

Schedule Run Schedule: Hall B is scheduled for an Engineering Run for a total of 30 calendar days beginning December 4, 2017, and ending January 28, 2018. First Experiment is scheduled to begin February 5. There are 8 days of no-beam built into the schedule that can be used to implement changes to CLAS12 components if needed (for example as a result of findings during the engineering run). CLAS12 Commissioning with Cosmics for 2 weeks stating November 17

CLAS12 – “Ready for Science” Review Jefferson Lab, CEBAF Center 9/25-26, 2017 Room L102 (9/25) , F326/7 (9/26) Review Committee : E. Smith (co-chair), S. Stepanyan (co-chair), K. Griffioen, K. Joo, D. Lawrence, B. Hess, B. Zihlmann https://www.jlab.org/conferences/hallb/sciencereview0917/index.html

CLAS12 “Ready for Science” Charge The scope of the meeting is to: (A) Review the readiness of the “CLAS12 First experiment” effort to coordinate the CLAS collaboration in the task of producing first rate science in course of and following the data taking period, and be ready for expedient analysis and result publications (this includes both understanding the detector and having the simulations and reconstruction software in place for physics.) (B) Review the readiness of the effort to operate and commission all systems, providing the on-line monitoring and controls, trigger system, and the readout of all detector and ancillary systems. (C) Review the readiness of the calibration effort to use the scheduled engineering run for optimizing the detector responses. This effort must be prioritized to support the CLAS12 First experiment effort in the physics run immediately following the engineering run. Note: For the purpose of this review, the committee should assume: Both magnets will perform at the level required for the completion of the First Experiment plan, and beam time will be made available to carry out the program as requested.

Specific Charge Items Is the presented commissioning plan for CLAS12 comprehensive and developed in sufficient detail to ensure that upon completion the CLAS12 system will be ready for production data taking? Is the timeline reasonable and optimized, both in terms of duration of the study and the order of activities. Have the necessary production triggers been developed that are needed for the physics run, and are plans in place to test their efficiency? Are the presented monitoring and software tools adequate for the efficient commissioning of all CLAS12 systems? Are the online and offline analysis shift staffing plans during the commissioning period appropriate and adequate? Are the available resources (e.g. computing manpower) sufficient to enable the implementation of the commissioning results into the production data analysis on a reasonably short time scale (weeks)? Is the documentation of all systems (detector hardware, online/offline software, operating procedures, etc.) sufficiently detailed and complete to provide the required support for the shift taker and experts? Is the scope of simulation studies that have been performed or are planned before the run period adequate to understand the expected baseline performance of the CLAS12 system Are there studies or tests missing that should be specifically included in the plan to ensure the readiness for production data taking and processing?

CLAS12 “Ready for Science” Report Final report from the committee received October 2, 2017 Will be posted on the review web page Significant holes in our Calibration and Commissioning plans/execution The focus of the collaboration for the coming few weeks will be on the preparation and the execution of successful engineering run. Tracking of all the recommendations Document summarizing response to all the recommendations due November 10, 2017

CLAS12 Commissioning Update the commissioning plan with clear priorities with the focus on RGA running configuration Various commissioning and calibration steps must be supported by simulations. Clear goals and deliverables must be defined for each step. Break down commissioning plan into must/should/like categories to ease prioritization. Allocated sufficient time for trigger commissioning Develop 1-page summaries of the common systems that shift workers can use for guidance and place them in a central location Ensure successful execution of the plan: Well defined roles and responsibilities Clear concise documentation to the shift personnel Training for both offline and online shift personnel

CLARA Offline Reconstruction Trigger Implementation & Validation Complete CLAS12 Trigger Implementation and Validation Comparison between C++ implementation and hardware response Comparison between C++ implementation and GEANT4 and reconstruction results GEMC Or DAQ (.evio) Trigger C++ CLARA Offline Reconstruction NOTE: that step allows Offline Reconstruction team to get ready for trigger results processing during beam time Develop & document simulations/commissioning plan of the various trigger: rates, efficiency and stability.

Online Monitoring Online monitoring for physics reconstruction in CLAS12 environment should focus on detector occupancy, efficiency and calibration stability. Need : Centralized, configurable histogram service to supply occupancy and calibration quality information from all detector sources to monitoring clients. Automated procedures of detector timeline quality monitoring Method for setting alarms, notifications, automatic log-entries or database (CCDB,RCDB) entries on out-of-tolerance conditions. A responsible person should be identified to lead the online monitoring effort

Offline Monitoring Develop physics reactions to be used to monitor data production such: Basic monitoring as function of time similar to CLAS (Normalized quantities) Hit Base tracking/sector Time Base tracking/sector Electron/sector Charge hadrons/sector Tracks in central detector Protons in central detector Electron in the FT Physics reactions epπ+π- (missing mass with one pion missing, and inv. masses, pπ±, π+π-) ep->epπ0 (FT & EC/PCAL) Bethe-Heitler K+Λ(π-p)

Offline Reconstruction Software Complete the tracking to include the Forward Micromegas Complete the event builder Offline focus on detailed understanding of event reconstruction (Tracking and PID) as function of luminosity. Code Optimization

Scope of CLAS12 simulations- Status Detector simulation/Geometry & QA Detector digitization Rate simulations/Luminosity studies at different Solenoid filed Calibration procedures/calibration challenge Trigger simulations Simulations of the CLAS12 for the different Engineering Run configurations Full chain simulation toward online reconstruction Event Reconstruction & tracking/PID Resolutions & efficiency Physics simulations of approved experiments Detector alignment and distortions Magnetic field distortions Optimization of GEMC Background Merging with physics events Calibration reactions: Elastic, inelastic, BH… Machine learning and PID Machine learning and detector inefficiency … Including Documentation!!

Simulations Background merge mechanism needs to be implemented so that it can be compared with data and extensively tested. Perform realistic simulations for detector systems and compared with data such as trigger simulations, normalized raw TOF rates vs. lab angle etc. Verify the GEMC geometry and match to original drawings. Prepare high level representative simulation plots to be compared with data such as missing mass resolutions, pi0 mass resolutions, tracking efficiencies as function of lab angle and momentum, neutron detection efficiencies as function of momentum, etc. Implement mechanism to incorporate run-by-run calibrations into MC so that the simulations can match data in real time. Consider using a post-processor for run-dependent conditions instead of including them directly into the simulation. Actively seek offsite computing power for simulations.

Documentation Most of the documentation have been updated since the KPP Trigger studies and offline documentation need to be documented All Documentation will be placed in DOCDB under version control

Detailed simulations required- Highest priority Concerns Trigger rate from the FT Mitigation plan: Reduce the energy range for the accepted clusters:in the proposal the range was 0.5-4.5 GeV to select the large W that are necessary for the meson and the cascade spectroscopy but this could be reduced for example to 0.5-4 GeV. As a second choice we can use prescaling. Detailed simulations required- Highest priority Implementation of DC in the trigger for the required charge hadrons Operating at high luminosity Achieved the Full Field of the solenoid Major improvement to the beam line design based on detailed simulations ongoing Improvement to the tracking

Summary/Priorities Completion of the beam line simulation Trigger Online/quasi-online monitoring Completion of all the simulation tasks required for the Commissioning/Engineering run Completion of event reconstruction Monitoring of physics quantities Online reconstruction and time-line monitoring Detector Calibration Update the required documentation/training

Summary The focus of the collaboration for the coming few weeks will be on the preparation and the execution of successful engineering run. We will work with the collaboration to assign manpower (teams and team leaders) early next week to address the priority task list based on the recommendations from the Ready for Science Review to be ready for successful commissioning run. The collaboration is Ready for Science with the aim of the first results by October 2018.