CLAS12 – “Ready for Science” Review Jefferson Lab, CEBAF Center 9/25-26, 2017 Room L102 (9/25) , F326/7 (9/26) Review CommiCee : E. Smith (co-chair), S. Stepanyan (co-chair), K. Griffioen, K. Joo, D. Lawrence, B. Hess, B. Zihlmann 1 Hall B Ready for Science Review
CLAS12 “Ready for Science” 09/25-26, 2017 The scope of the meeUng is to: (A) Review the readiness of the “CLAS12 First experiment” effort to coordinate the CLAS collaboraBon 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 publicaBons (this includes both understanding the detector and having the simulaBons and reconstrucBon soIware 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 calibraBon effort to use the scheduled engineering run for opBmizing the detector responses. This effort must be prioriBzed to support the CLAS12 First experiment effort in the physics run immediately following the engineering run . Note: For the purpose of this review, the commiCee should assume: Both magnets will perform at the level required for the compleUon of the First Experiment plan, and beam Ume will be made available to carry out the program as requested. 2 Hall B Ready for Science Review
Specific Charge Items 1. Is the presented commissioning pla n for CLAS12 comprehensive and developed in sufficient detail to ensure that upon compleBon the CLAS12 system will be ready for producBon data taking? Is the 3meline reasonable and opBmized, both in terms of duraBon of the study and the order of acBviBes. 2. Have the necessary production triggers been developed that are needed for the physics run, and are plans in place to test their efficiency? 3. Are the presented monitoring and software tools adequate for the efficient commissioning of all CLAS12 systems? 4. Are the online and offline analysis shi8 staffing plans during the commissioning period appropriate and adequate? 5. Are the available resources (e.g. compuBng manpower) sufficient to enable the implementaBon of the commissioning results into the producBon data analysis on a reasonably short Bme scale (weeks)? 6. 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? 7. 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 8. Are there studies or tests missing that should be specifically included in the plan to ensure the readiness for production data taking and processing? 3 Hall B Ready for Science Review
CLAS12 components for this review 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), DriI 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), ElectromagneBc 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), Central Neutron Detector (CND) Slow Controls • DAQ/Online compuBng • Trigger • • Beamline equipment Offline SoIware • 4 Hall B Ready for Science Review
Run Group A Hall B Proposal Physics Contact Rating Days Group New Energy Run Group Target equipment E12-06-108 Hard exclusive electro-production of π 0 , η Stoler B 80 RICH (1 liquid sector) H 2 E12-06-108A Exclusive N*->KY Studies with CLAS12 Carman (60) Forward tagger E12-06-108B Transition Form Factor of the η ’ Meson with CLAS12 Kunkel (80) A E12-06-112 Proton’s quark dynamics in SIDIS pion production Avakian A 60 139 11 F. Sabatié E12-06-112A Semi-inclusive Λ productiuon in target fragmentation region Mirazita (60) E12-06-112B Colinear nucleon structure at twist-3 Pisano (60) E12-06-119(a) Deeply Virtual Compton Scattering Sabatie A 80 E12-09-003 Excitation of nucleon resonances at high Q 2 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 A- 120 E12-12-001A J/ ψ Photoproduction & study of LHCb pentaquarks Stepanyan (120) E12-12-007 Exclusive φ meson electroproduction with CLAS12 Stoler, Weiss B+ 60 Beam time partial sum 559 139 (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 in two run groups. 5 5 Hall B Ready for Science Review
Additional Comments 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. Run Group A 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). Response: The committee may respond to the charge questions using a single category of "recommendations”, which should be a combination of major comments and recommendations using "standard" categories. Report timeline: In order to be most useful for the collaboration in preparing for the upcoming engineering run and for the first physics experiment a draft report should be prepared within a week, and the final report within two weeks. 6 Hall B Ready for Science Review
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