The Commissioning of the CLAS12 Detector

V. Burkert, D. Carman, R. De Vita, D. WeygandCLAS12 workshop, June 21st 2011

CLAS12 Commissioning• Preparation of the commissioning plan for the CLAS12 detector has

started- Crucial step for successful and efficient start of CLAS12 data taking- Need to address all detector subsystems with coherent and detailed

plan, from construction and installation phase to in-beam commissioning

- First document, describing the plans for the commissioning of the CLAS12 base equipment, was presented to DOE in 2008 for review

• Recently the CLAS12 steering committee has taken charge of the preparation of a new updated plan

• The CLAS12 steering committee has appointed a committee (R. De Vita - chair, D. Carman, D. Weygand, V. Burkert – advisor) to collect information for all subsystems, review it and organize collected information in a coherent plan, …, provide a written document

Commissioning Plan• Commissioning will be divided in three phases

1. Quality assurance and system checkout of CLAS12 subsystems during construction and installation

2. Commissioning without beam (laser, cosmic rays, …)3. Commissioning with beam

• Should be built based on information collected from detector groups and hardware experts

• Should address the software requirements to successfully complete the detector commissioning and perform initial calibration

• Should exploit the past experience gained during the CLAS commissioning and operation

Committee Activity: #1-SurveyCLAS12 subsystems: Instrumentation: Beamline, Moller polarimeter, MagnetsDetectors: FTOF, CTOF, EC-PCAL, DC, SVT, MM, HTCC, LTCC, CND, FT, RICHOnline: Electronics, DAQ, Trigger, Slow Controls, Database,

Reconstruction/Monitoring

Information Template:Structure: list foreseen tasks according to the three commissioning phases (quality

assurance and system checkout, commissioning without beam and commissioning with beam)

Items: for each of the planned tasks, provide information on goals, technique and equipment, manpower and time needs, DAQ & Trigger configuration, software and computing resources, dependencies, information to be saved in the database, repetition frequency

System Contact Persons:Main: should act as a liaison between the committee and detector/system group to

collect and provide requested informationSoftware: should be the link between the system group and the CLAS12 software group

Information Template1.1. Quality assurance:Describe the procedure that will be followed during the construction of the system and its installation in Hall B to ensure the proper functioning of the device, verify alignment and positioning, identify and replace faulty components, … . For each test that is foreseen provide the following information.

Information Template3. Commissioning with beamDescribe the run conditions and configurations that are foreseen for this system in the initial phases of operation with beam. List the data runs that you plan on doing, specifying the configuration of your system and of the other detectors, DAQ and trigger configuration and describing the parameters that will be monitored (rates, spectra, …) and the final outcomes. Include all the runs that should be done to check the system and to perform a complete calibration of the detector.

System ContactsSystem Contact Person(s) Software Contact Person(s)Beamline/Target E. Pasyuk Moller B. Raue Magnets: solenoid L. Quettier torus L. Quettier Time of Flight: FTOF D. Carman D. CarmanCTOF V. Baturin V. Baturin Calorimeters: EC S. Stepanyan W. Brooks/M. WoodPCAL S. Stepanyan W. Brooks/M. Wood Forward Tracker: DC M. Mestayer M. Mestayer Central Tracker: SVT Y. Gotra M. Holtrop, S. PhillipsMM F. Sabatie S. Procureur Cerenkov Counters: HTCC Y. Sharabian/ V. Kubarovsky M. Ungaro/A. VlassovLTCC M. Ungaro/ J. Price M. Ungaro/A. Vlassov New equipment: CND S. Niccolai S. NiccolaiFT M. Battaglieri D. WeygandRICH P. Rossi M. Contalbrigo Online: DAQ S. Boiarinov Electronics C. Cuevas Trigger V. Kubarovsky EPICS N. Gevorgyan Database J. Goetz Reconstruction/Monitoring D. Weygand

Status• Request to fill information templates was sent out to contact persons on

April 4th 2011

• Present status:• Feedback from all subsystems• 50% of the templates were returned

• Review of available templates is in progress

• Preparation of comprehensive document has started

Thanks to all the system groups and the contact persons for their prompt response to this call and the precious information that is being provided!!

OutcomesIn addition to providing critical information for the development of the CLAS12 commissioning plan, the survey has outcomes in relevant areas:

Slow controls: the information provided by the system groups will allow to define a detailed list of slow controls that will have to be implemented.

Database : list of items to be saved in the CLAS12 database will allow to define the database structure and exploit this fundamental resource in all the phases, from the detector construction to the final operation

Software: details on software requirements and needs will be crucial to ensure the availability of proper tools and computing resources

Manpower: estimates of the necessary manpower for the completion of all the tasks connected with the construction, installation and commissioning of the CLAS12 subsystem allows to identify critical areas where the Collaboration may contribute providing engineering and software resources