1. Overview of CLAS12 Calibration
Daniel S. Carman
Jefferson Laboratory
CLAS12 Experiment Workshop
February 23, 2016

2. CLAS12 Experiment Workshop – February 23, 2016
CALCOM Role
Oversight of CALibration and COMmissioning
for CLAS12 baseline and non-baseline detectors
Provide oversight to the development of subsystem calibration suites
With the software group, provide software templates for detector groups and common I/O tools
Work with subsystem groups to develop documentation, tutorials for calibration suites, and calibration tools
Help to find manpower and to ensure efficient use of resources by setting priorities for different work tasks
Develop detailed plans for commissioning with beam activities
CWB to verify Key Performance Parameters (KPP)
Full commissioning/engineering run before start of RG-A production run
Daniel S. Carman
CLAS12 Experiment Workshop – February 23, 2016

3. CLAS12 Experiment Workshop – February 23, 2016
CLAS12 Commissioning
A comprehensive plan to commission the CLAS12 spectrometer and its subsystems has been prepared (June 2014)
Three phases:
Quality assurance and system checkout
Commissioning without beam
Commissioning with beam
Detailed plan for each CLAS12 subsystem based on input from detector groups
Procedures and tasks
Manpower and time
Software resources
Plans now being updated for final review
Task #1: CWB plan for KPP run
Task #2: Engineering run
KPP commissioning scheduled for Feb. 2017
Daniel S. Carman
CLAS12 Experiment Workshop – February 23, 2016

4. CWB Simulations for KPP
Understand expected CLAS12 rates:
simulate hadronic reactions
Tracking and vertex distributions:
show vertex distribution from tracking – HBT and TBT
Particle id from calorimeters:
electrons, p0 (calorimeters)
charged particles (FTOF)
Work in progress 5o
Silvia Pisano
35o
Daniel S. Carman
CLAS12 Experiment Workshop – February 23, 2016

5. Subsystem Documentation
Geometry Document:
Defines complete system specification
Provides appropriate coordinate systems
clear, easy-to-understand pictures
Calibration Database Document:
Identifies the parameters that are used to
go from detector signal to "hit value”
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.
Reconstruction Software Document:
Describes the mathematical methods and formulae used in the reconstruction
Monte Carlo Baseline Document:
Details response of detector to be captured by Monte Carlo modeling
Daniel S. Carman
CLAS12 Experiment Workshop – February 23, 2016

6. Calibration Suite DevelopmentFT
FTOF
SVT
LTCC
HTCC EC
PCAL
Daniel S. Carman
CLAS12 Experiment Workshop – February 23, 2016

7. Calibration Progress Tracking
Tracking of calibration suite development:
CND, CTOF, DC, EC/PCAL, FT, FTOF, HTCC, LTCC, SVT, MM
(updated monthly)
Daniel S. Carman
CLAS12 Experiment Workshop – February 23, 2016

8. Calibration Suite Progress
Development Progress
CND
CTOF DC
EC/PCAL FT
FTOF
HTCC
LTCC
SVT MM
(TBD)
(18%)
(45%)
(68%)
(16%)
(35%)
(32%)
(14%)
(55%)
(TBD)
Timeline: i) Suite b-versions – end of May 2016
ii) Document and tutorials – Summer 2016
iii) MC data calibrations – Fall 2016
Daniel S. Carman
CLAS12 Experiment Workshop – February 23, 2016

9. CLAS12 Experiment Workshop – February 23, 2016
Summary
The CALCOM group is overseeing the development of the commissioning and calibration schemes for the CLAS12 detector and its subsystems.
The plans have been developed based on feedback from the external review from 2015, the parameters given to us by the 12 GeV project, and feedback from the subsystem experts and the collaboration.
A successful beam commissioning plan, which includes the development of robust and documented calibration suites, is essential for the success of the first run group experiments.
Said another way, a successful KPP commissioning period and a successful engineering run will go a long way toward ensuring success of the first run group experiment with CLAS12.
The development of the calibration suites for each subsystem is being tracked and monitored through the weekly meetings of the CALCOM group.
Daniel S. Carman
CLAS12 Experiment Workshop – February 23, 2016

10. Key Performance Parameters
Detector operational: events recorded with > 2 nA electron beam with > 6 GeV beam energy (3 pass)
Detector running for ~one shift recording data from all subsystems
Screenshots of beam status screens and accelerator Elog entries demonstrating the electron beam current and energy
Plots showing relative timing (coincidence) of calorimeters, time-of- flight and Cerenkov counters
Event displays showing correlations of particle hits in Forward Detectors
Event display showing correlations of particles detected in FD and hits in CTOF of Central Detector (CD)
Plots of particle trajectories showing target position
Particle identification plots using signals from calorimetry detectors
(preliminary)
Daniel S. Carman
CLAS12 Experiment Workshop – February 23, 2016