1. CLAS12 First Experiment Workshop Report
Latifa Elouadrhiri
Jefferson Lab
For more details about the workshop
CLAS Collaboration
Jefferson Lab
June 14, 2017

2. Outline KPP – Data Calibration/Analysis Status and Plans
Engineering Run Configuration
Hardware Status
DAQ, Electronics and Trigger: CLAS12 Commissioning with Cosmics
Online & Monitoring
Slow Control
Offline: Simulation, Event Reconstruction & Calibration ( See Talks by Veronique and Raffaella)
Path Forward to Physics

3. KPP – Data Calibration/Analysis Status
KPP – Run Period Feb. 3 – Feb. 6, Data taking with the full detector readout: SVT, CTOF, 1 sector DC, 6 sectors FTOF & ECAL
Calibration still in Progress to be completed in August (see Raffaella’s talk)
KPP data processing (

4. KPP – Analysis Note in Preparation
Our Goal for the Engineering Run is to
Perform quasi-online calibration
Work will be done with Calcom and Ken Hicks (ACE)

5. CLAS12 Hall B Equipment MM CND FT RICH Total # of channels: 111832
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
Cryo Target
Moller polarimeter
Polarized Targets MM
CND FT
RICH
Total # of channels:

6. Detector System
All baseline equipment commissioned with beam, repairs of the PCAL/EC scheduled this summer once the solenoid is installed
DC gas system completed and commissioning all six sectors including trigger is underway
Micromegas and SVT integration completed and commissioning is underway
FT Ready for installation in July
RICH being assembled at JLab and installation planned in September.

7. Target and Moller Polarimeter
Design completed all parts in hand
Pressure system analysis complete
Assembly scheduled in July
Installation scheduled in August
Moller Polarimeter
Measurement of target polarization completed
Data analysis in progress
Still to be done:
Prepare target for beam
Work with helicity signals as well as exercising the whole software
   

8. CLAS12 DAQ/Trigger
Electronics installed (and was used for KPP): ECAL, PCAL, FTOF, LTCC, DC, HTCC, CTOF, SVT
Online computer cluster is 100% complete and operational
Networking is 100% complete and operational
DAQ software is operational
Need to add scalers for Faraday Cup, helicity etc
Trigger simulations and algorithm developed, cluster finding for PCAL, improved energy correction for both ECAL and PCAL (underway), HTCC, DC segment finder, DC road finder implemented
Trigger simulation studies for both CLAS12 and FT triggers are underway.

9. Online
Computing hardware is available for most online tasks (runtime databases, messaging system, communication with EPICS etc)
There is no designated ‘online farm’ for data processing in real time, two hot-swap DAQ servers can be used as temporary solution
Some work still needed for process monitoring and control, CLAS event display, data collection from different sources (DAQ, EPICS, scalers etc)
Runtime database (transformation to RCDB)
Slow control excellent progress on track for the engineering run

10. CLAS12 FD Full Chain Commissioning
Goals:
check all drift chamber channels in 6 sectors fix bad channels, connectors
measure DC efficiencies in all regions and sectors with tracks,
determine DC HV & thresholds
DC alignments with straight tracks (Torus field OFF)
Fix all bad channels in PCAL/EC & FTOF
FTOF calibration (no RF available)
EC/PCAL Calibration
calibration documentation for team training
Detector Configuration in place
All EC + PCAL operational in 6 sectors
FTOF 1a, 1b operational in 6 sectors
DC R1, R2, R3 operational in 6 sectors (Noise in DC R2 being fixed)
DAQ & Trigger
Trigger-1: Pixel trigger in EC all 6 sectors
Trigger-2: Cluster trigger in EC all 6 sectors
Trigger-3: DC R3 - Segment Track
Trigger-4: DC R1-R2-R3 full track
DAQ readout, all sectors, all channels

11. DC Noise Work (from B.Raydo)
Turbo pump was moved (was already planned work luckily)
Dramatic improvement on noise
see next slide for noise rates before & after
R2 DCRB modules were modified to improve power supply noise return path
see next slides for noise rates before & after
Currently can run at -45mV thresholds for R2 (lower for R1 & R3)
R1 & R3 DCRB modules are planned for modified in June
Since R1 & R3 DCRB contribute noise to R2 we expect a noticeable noise improvement on R2 after all DCRB modification complete
See final slides which shows expected R2 noise when all DCRB modification complete (R1 and R3 crates were off for this measurement

12. DC-R2 Noise Before Improvement

13. Expected DC-R2 Noise After Improvement

14. Preparations for Fall Runs
Complete KPP data calibration
Cosmic ray test with full complement of forward detectors
Checkout all 18 drift chambers (all 6 sectors) for noise levels
Measure tracking efficiencies for minimum ionizing particles
Test special triggers for engineering run and physics runs
Calorimeter pixel triggers for cosmic ray calibration of calorimeters and 6/5 superlayer reconstruction
Tracking triggers in DCs (DCRB) and hits in FTOF, PCAL and EC
Train reconstruction software on real events in all 6 sectors and 3 regions
Plan on internal “Ready for Science” review in September
Status of all detectors, calibrations, reconstruction, particle ID, …
Full event reconstruction in FD and CD and correlations
Acceptances for several reactions, impact of background occupancies
“Online” calibration procedures
Documentation
Identified lead teams
11/9/2018

15. Analysis Committee of Experts (ACE)
ACE members: K. Hicks (chair), D. Ireland, K. Joo, S.Kuhn, S. Niccolai, E. Pasyuk, L. Weinstein
Goals of the committee as defined by CLAS chair, (Formed on the recommendation of the common tools committee)
Guide the development of analysis algorithms (after calibrations)
PID, momentum corrections, backgrounds, fiducial cuts, etc.
Higher level analysis: kinematic fitting, PWA (if applicable)
Standardize the algorithms and software
Etc.
Draft Report of the ACE Committee completed: the document outlines the recommended procedures for data analysis from the CLAS12 detector.
Will work in collaborative effort with Software Clacom and ACE to prepare for the September science review

16. Timeline TASK 2016 2017 SIMULATION RECONSTRUCTION CALIBRATION
FD & Trigger commissioning in progress
Full Chain test
With cosmics
TASK
2016
2017
Oct.
Nov.
Dec.
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept
SIMULATION
RECONSTRUCTION
CALIBRATION
EXP. SCHEDULE
New release with full central detector
Ready
for Physics
Ready for KPP
Hall B Science
review
KPP Run
Engineering Run
Second Calibration
Challenge
First Calibration
Challenge

17. Mailing list clas12_first_exp & biweekly meeting, Wednesdays at 8:30
Looking forward to successful engineering run and the start of physics with CLAS12!
Mailing list clas12_first_exp & biweekly meeting, Wednesdays at 8:30