1. CLAS12 Calibration and Commissioning (CALCOM)
Daniel S. Carman
Jefferson Laboratory
BONuSFest
August 21, 2015

2. Outline CLAS CALCOM group Commissioning activities
Input from detector subsystems
Example of development (SVT)
Commissioning with beam
Summary
Daniel S. Carman
BONuSFest – August 21, 2015

3. CLAS12 CALCOM Group
Calibration and Commissioning Group established in 2011
Oversight of commissioning and calibration activities for CLAS12 baseline and non-baseline detectors
Liaison between detector groups and CLAS12 hardware and software experts
6 permanent members, including software experts and representatives of the detector groups
Hardware Group
Software Group
CALCOM
beamline
magnets
EC-PCAL
FTOF
CTOF DC
SVT MM
HTCC
LTCC
CND FT
RICH
OFFLINE
ONLINE
Slow Control
CLAS12
Contact Persons …
Daniel S. Carman
BONuSFest – August 21, 2015

4. 1). KPP verification, II). Full commissioning before physics run
CALCOM Role
Track efforts given timelines for installation and beam
Help to find manpower and to ensure efficient use of resources
Provide oversight to the development of calibration tools
Provide feedback from the detector groups to the software group and vice versa
In collaboration 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
Develop detailed plans for commissioning with beam activities
1). KPP verification, II). Full commissioning before physics run
Daniel S. Carman
BONuSFest – August 21, 2015

5. CLAS12 Commissioning
The CLAS Collaboration has developed a comprehensive plan to commission the CLAS12 spectrometer and its subsystems:
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
Daniel S. Carman
BONuSFest – August 21, 2015

6. Commissioning Activities
Meetings on CLAS12 subsystems:
Participants: CALCOM members and subsystem representatives
Purpose: discuss and review subsystem commissioning plans
Outcomes: recommendation to subsystem groups
Meetings with EC/PCAL, DC, FTOF, CTOF, CND, MM, SVT, FT, HTCC, Beamline, RICH
Meeting minutes and committee recommendations available on CALCOM Wiki
Daniel S. Carman
BONuSFest – August 21, 2015

7. Commissioning Templates
Daniel S. Carman
BONuSFest – August 21, 2015

8. Commissioning Activities
Subsystem Reports:
Reports submitted from all CLAS12 subsystem groups via standard templates:
Status, achievements, and issues
Highlights
Work plans, resources involved and timeline
Documentation of progress
Used for reports to collaboration
Daniel S. Carman
BONuSFest – August 21, 2015

9. Subsystem Group Responsibilities
Detector 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
BONuSFest – August 21, 2015

10. Subsystem Group Responsibilities
SLOW CONTROLS:
Each detector group is asked to identify a person who will be responsible to act as a liaison to the Slow Controls team.
Role:
Work together with slow control group to define the slow controls needs of the system. Identify things that will already be taken care of as standard (e.g. HV, Low Voltage, Disc/Scaler)
Identify any non-standard hardware and ensure that drivers / device support are available. NOTE. The development of drivers / device support will be done by specialists. Mostly already done.
Create any specialist GUIs required for that system. This will be done using a drag and drop GUI builder tool. Templates and examples will be provided.
Develop and specialized slow controls scripts / tools for that subsystem. e.g. initialization, monitoring, alarming.
Daniel S. Carman
BONuSFest – August 21, 2015

11. SVT Commissioning Advanced commissioning/calibration stage:
Checkout of hardware systems complete:
DAQ
power supplies
crates
HV distribution boxes
backend electronics
patch panels
slow controls modules
cables, trigger
System monitoring via EPICS operational
Calibration via measurement of noise, gain, noise as a function of load
Calibration via cosmic rays
Daniel S. Carman
BONuSFest – August 21, 2015

12. SVT Commissioning Noise and Gain, R1-R4 Median ENC 264 chips (R1-R4)
Mean Gain
264 chips (R1-R4)
MIP: e
Equivalent Noise Charge in 128 channels of one readout chip
Gain distribution in 128 channels of one readout chip
Daniel S. Carman
BONuSFest – August 21, 2015

13. SVT Commissioning Cosmic rays Strip occupancy
3D position of reconstructed crosses
R1-R3 standalone trigger rate ~50 Hz
Millions of cosmic tracks recorded
Shorter strips
2D projection of a cross
Strip occupancy
Channel masking tested
Daniel S. Carman
BONuSFest – August 21, 2015

14. Temperature and humidity monitoring
SVT Monitoring
Module monitoring
Temperature interlock R1 R3
Alarm handler R2
Humidity interlock
Dew point interlock R4
Coolant interlock
Chiller
LV and HV PS control and monitoring
Temperature and humidity monitoring
Daniel S. Carman
BONuSFest – August 21, 2015

15. SVT Monitoring Temperature, C Current, μA R1-R4 R2
Ambient temperature in the clean room
Daniel S. Carman
BONuSFest – August 21, 2015

16. Common Software Tools DATA I/O: Calibration database access tools:
Histogramming tools
Daniel S. Carman
BONuSFest – August 21, 2015

17. Commissioning with Beam
The “CWB” plan consists of 5 different phases
from the initial functionality checks to the final
preproduction data taking:
detector functionality checks
luminosity scan
special runs for detector alignment
magnetic field and energy scan
detector calibrations
➔ assessment of detector functionality
➔ establishment of detector operation at nominal luminosity
➔ data for precise determination of relative detector positions
➔ study of detector response for different configurations
➔ data for full detector calibration and performance evaluation
Daniel S. Carman
BONuSFest – August 21, 2015

18. CWB Objectives
After completion of the commissioning, the functionality of the Hall B instrumentation, including:
all CLAS12 detectors installed in the initial data taking period
the trigger, data acquisition, and slow control systems
the CLAS12 online/offline software
will have been verified
The data accumulated during the CWB period will allow the CLAS Collaboration to:
perform full calibrations of the spectrometer
assess its performance in terms of resolution, kinematical coverage, and efficiency before the beginning of production data taking
Daniel S. Carman
BONuSFest – August 21, 2015

19. CWB Timeline
Daniel S. Carman
BONuSFest – August 21, 2015

20. BONuS CALCOM Work
To proceed in preparation for calibration and commissioning work for the BONuS experiment:
Define a contact person for BONuS hardware and software
Prepare a detailed commissioning plan:
System Quality Assurance during detector construction/assembly
Commissioning plan after detector assembly for both before and after installation in Hall B.
Detailed commissioning with beam plan for BONuS
Prepare the required documentation:
Geometry specifications
Database definitions
Detector monitoring requirements
Reconstruction approach
Monte Carlo matching specifications
Daniel S. Carman
BONuSFest – August 21, 2015

21. Summary
The CLAS Collaboration has developed a detailed Commissioning Plan for the CLAS12 detector and its subsystems
The plan is structured in different phases from the initial functionality assessment to the final pre-production data taking
The plan has been developed to help ensure:
The subsystem components have met rigorous QA requirements during assembly
The subsystems have been sufficiently and fully tested before installation to minimize potential issues
The subsystems have detailed plans developed for cosmic ray/laser/pulser studies post installation to be sure they are ready for commissioning runs
A detailed commissioning with beam plan for CLAS12 and its subsystems has been developed
A path forward for the BONuS group to integrate into the CALCOM scheme has been presented
Daniel S. Carman
BONuSFest – August 21, 2015