CLAS 12 Experiment Preparation Workshop Latifa Elouadrhiri February
CLAS 12 Experiment Preparation Workshop Latifa Elouadrhiri February 24, 2016
CLAS 12 Status Overview § All base detector construction completed, CTOF undergoing final testing, LTCC all six sectors installed , FTOF Panel 2 to be installed next, staring next week § Beam line being finalized – shielding procurement planned for March § Torus assembly nearly complete – survey & alignment ongoing, cryogenics next, plan for (limited) field mapping. Solenoid coil #5 (shielding) winding started, with delivery date end of September. § CND to be tested, FT assembly and commissioning in EEL, MM - First barrel layers integrated with SVT and being commissioned. RICH detector on track for 2017 completion § VXS Trigger Processor (VTP) first article expected March 20 and the balance early June, DCRBs (Drift Chambers new electronics) are ready for installation. Weekly Online and trigger team meetings have started § Slow Control on track for completion Summer 2016 § Offline software validation of reconstruction code using cosmic rays and simulations § Calibrations and commissioning for all the system in advanced stage 2
Hall B in February 2016
Run Group Schedule – Tentative Run Group Days All Run Groups 2015 936 HPS 180* PRad 15* 2016 CND 2 -3 2017 2018 2019 FT RICH MM 2020 Trans. PT 2021 525 411 7 ? 10 ? CLAS 12 KPP Remai n --15 RG-A (proton) 139* RG-F (Bo. Nu. S) 42* RG-B (deut. ) 90* RG-C (NH 3) 120 RG-C-b (ND 3) 65 RG-E (Hadr. ) 60 RG-G (TT) 110* RG-D (CT) 60 RG-K (Li. D) 55 9/30/2020 20 50 69* 40 2 45 45* 15 45 60 35 30 20 15 25 55 55 30 30 55 April 2015 CLAS collaboration meeting 4 4 ---
RUN GROUP A - Experiments Duration: New equipment: Energy: Target: Experiment E 12 -06 -108 A E 12 -06 -112 A E 12 -06 -112 B E 12 -06 -119 E 12 -09 -003 E 12 -11 -005 A E 12 -12 -001 E 12 -12 -007 Contact Stoler Carman Avakian Mirazita Pisano Sabatie Gothe Battaglieri Guo Nadel-Turonski Stoler, Weiss 139 days 20 days commissioning 60 days high luminosity 39 days low luminosity 20 days reversed torus polarity CND, MM, Forward Tagger, (RICH? ) 11 Ge. V LH 2 Topic Deep pi 0/eta N*->KY studies Pion SIDIS Lambda SIDIS Di-Hadron SIDIS DVCS Nucleon Resonance Meson Spectroscopy Very strange baryons TCS & J/Psi Deep Phi Specifics Needs FT + special trigger + low-luminosity running time Needs reversed torus polarity running Biweekly meetings, Wednesdays ( chaired by Franck and Latifa) at 9: 00 am 5
RUN GROUP A – Beam time Request 1) In addition to the 20 days for the commissioning experiment, high luminosity running of 60 days is needed for 4 experiments (E 12 -06 -108, E 12 -06 -119, E 12 -11 -005, E 12 -12 -001). Experiment E 12 -11 -005 requires additional lower luminosity operation for 39 days. 2) E 12 -12 -001 received approval for additional 20 days of running at reversed Torus polarity. The listed RG-A time of 139 days will thus serve all PAC-approved experiments with a total of 559 days of individually approved beam times. (This number does not include the run group experiments, which account for an additional 300 days if run independently. ) Note: Experiment E 12 -11 -005 part of RG-A requires the Forwards Tagger (FT) that allows for electron scattering at very low Q 2 (10− 2 − 10− 1 Ge. V 2), which provides a high photon flux and a high degree of linear polarization, complementary to the capabilities of Hall D. It requires an an additional trigger that uses charged tracks from the CLAS 12 tracking detectors. This trigger system is now under construction. 6
Experiment configuration
Experiment configuration Configuration for Run Group A
Experiment configuration Configuration for Run Group A Same FT shield can be used when FT is not in used. Removal of FT tracker has minimal schedule impact. Hot spot in Torus Mount can be shield Helium between target and shield improves background by: • ~ 10% if FT is used • ~ 40% if FT is used – at which point the occupancy is < 1% in R 1
Configuration - FT is shield Full Solenoid 75% Solenoid 50% Solenoid
Vertex Tracker Configuration 4 Regions of SVT + 1 Region of MM Plus FMM Defines the focus of the reconstruction and simulation effort.
CLAS 12 Operating Luminosity Studies under way: • Rates and radiation doses – Forward tagger – Forward MM – Forward time-Of-Flight • Tracking: – Drift chambers, efficiency studies as function of luminosity – Forward MM – Vertex determination • These studies are being performed at different field of the solenoid setting full field and half field. April 2015 12
CLAS 12 Torus Magnetic Field Mapping Physics Requirement 13
The team • Physicists: Mac Mestayer, Joseph Newton • JLab Engineers: Renuka Ghoshal, Ruben Fair, Orlando Pastor, Probir Ghoshal • Accelerator: Joe Meyers • Survey, DAQ: Kelly Tremblay, Mark Taylor • Shift Personnel: … + collaboration April 2015 CLAS 12 Torus Magnetic 14 14
Magnetic Field measurement Status • Physics Requirements : measure field to 0. 1% accuracy at a radius known to 0. 1 mm • Strategy: § where to map field : 4 x-y locations each sector, ~25 – 50 pts in z § measure actual, calculate deviation from ideal model § fit deviation from ideal to error tables : with adjustable strength • Design and Prototyping § sensor built, ready for survey, prototype tests § fixtures designed, almost ready for procurement § analysis software: fitting shell built; testing with toy model 15
Magnetic Field measurement Status • Physics Requirements : measure field to 0. 1% accuracy at a radius known to 0. 1 mm • Strategy: § where to map field : 4 x-y locations each sector, ~25 – 50 pts in z § measure actual, calculate deviation from ideal model § fit deviation from ideal to error tables : with adjustable strength • Design and Prototyping § sensor built, ready for survey, prototype tests § fixtures designed, almost ready for procurement § analysis software: fitting shell built; testing with toy model Detector alignment is our next Focus 16
Experiment Readiness Reviews: CLAS 12 April 13, 2016: Torus Cooldown May 2016 (last week? ) : Torus Power up 13 -14 June 2016: Ancillary equipment [CND, FT, Micromega (MVT+FMT), RICH] October 2016: Solenoid Cooldown Committee: the same as of the Torus November/December 2016: Solenoid Power up Committee: the same as of the Torus 1 st week January 2017: CLAS 12 ERR – 1 st phase (includes documentations) ? : last CLAS 12 ERR – 2 nd phase 17
Documentation Required for ERR • The entire beamline, target, magnets, detector configuration is defined (including ownership, maintenance and control during beam operation) • Formal documentation requirements and reporting procedures to operate the Hall (COO, ESAD, RSAD, ERG, OPS and the general equipment operation manuals, etc. ) • The evaluation of the primary beam and generated secondaries completed and documented. • Documentation of rates and radiation levels • Document that the manpower and resources required to carry on each task are identified and adequate April 2015 18
Documentations for Calibration and Software Detector subsystem documentation: 1) Geometry document: – Defines complete system specification – Provides appropriate coordinate systems – clear, easy-to-understand pictures 2) Calibration database document: – Identifies the parameters that are used to go from detector signal to "hit value” 3) Monitoring document: – Identifies histograms and other data summaries that will be used online to monitor detector performance and, in particular, identify malfunctioning equipment – Identifies plots to be used by the offline "chef" to make sure that the relevant reconstruction code (e. g. tracking, shower-finding, etc. ) is working right; e. g. number of tracks per event, etc. 4) Reconstruction software document: – Describes the mathematical methods and formulae used in the reconstruction 5) Monte Carlo baseline document: - Details response of detector to be captured by Monte Carlo modeling 6) Slow Control requirement document: 7) Data analysis documents - Details of cuts and corrections 8) Safety/operation documents April 2015 19 19
Agenda of the Workshop Feb 23 8: 30 - 8: 45– 9: 00 – 9: 15 – 9: 45 – 10: 15 Introduction and Goals of the meeting Latifa Elouadrhiri & Franck Sabatie Overview of the CLAS 12 Software Veronique Ziegler Overview of the CLAS 12 calibration Dan Carman Silicon Vertex Tracker Yuri Gotra Drift Chambers Krishna Adhikari 10: 15 – 10: 30 – 11: 00 – 11: 15 – 11: 30 – 11: 50 – 12: 05 12: 00 – 12: 15 – 1: 30 - 1: 50 Break Simulation/experiment configuration Maurizio Ungaro 1: 50 – 2: 10 Luminosity upgrade Whitney Armstrong 2: 10 – 2: 30 – 2: 50 - 3: 10 – 3: 30 – 3: 50 – 4: 10 – 5: 00 Slow control Forward Carriage Cole Smith Time-of-Flight - reconstruction Jerry Gilfoyle Cerenkov - reconstruction Nick Markov Common tools status and plans Gagik Gavalian CLAS 12 data base CED (CLAS 12 Event Display) Harut Avakian David Heddle Lunch Nathan Batzell Field mapping Mac Mestayer Detector alignment Simon Taylor Break Simulation for the analysis Maurizio Ungaro Framework for data analysis Gagik Gavailian General discussion and Path forward Latifa Elouadrhiri &Franck Sabatie Adjourn April 2015 20
Action Items from the Workshop • Raise priority of the documentation tasks: reconstruction, calibration, monitoring, detector description, tutorials • Organize periodic training sessions for remote users with standard solutions for common tasks (as we did in the past during collaboration meetings) • Prepare and distribute a prioritized list of software tasks with schedule, deadlines, resource requirements • Establish software service work rules for users contribution, endorse subscription to the software tasks (Veronique Ziegler (Software project manager), Raffaella De Vita (Calcom project manager) • Establish Feed-back mechanism • Allocate resources for development of the common tools • Put more effort in data and code validation • Using simulation and reconstruction to determine the optimal configuration for the different proposals for RG-A Keeping in mind the requirements to address the KPP April 2015 21
Great Progress Since Last Collaboration Meeting THANK YOU April 2015 22
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