Difference between revisions of "Addressing ERR review recommendations"

Revision as of 09:15, 28 June 2018

Charge 2: Has the detector been completed, commissioned and ready to operate? If not, what are the completion/commissioning schedule and tasks?

• Recommendation 1: The schedule for DIRC installation and testing before the hall closes for GlueX operation is extremely tight. The installation plan should be carefully evaluated to ensure that it can be safely completed in the allowed time. An alternative plan for commissioning and testing should be developed in case installation and commissioning are not completed on time.
  • MIT-Bates provides weekly updates on optical box fabrication status.
  • Alternative installation and commissioning plan will be developed, pending updates on status from Bates (Deadline: August 1)

• Recommendation 2: List all of the goals and milestones for successful commissioning.
  • Justin prepares list of commissioning goals and milestones for discussion at July 12 DIRC meeting
  • Form DIRC Reconstruction/analysis sub-group with bi-weekly meetings to discussion calibrations, algorithms, and simulation details.

• Recommendation 3: The magnetic field on the PMTs and magnetic shielding were concerns raised in the 2015 review (Technical comments 23 and 24). The results were not presented to this review. The committee recommends that those comments on the previous review should be addressed.
  • The magnitude of the field in the PMT region which is transverse to the PMT plane orientation is ~15 G (from Eugene's calculation). Previous studies of the H12700 indicate that this would cause a ~15% loss of efficiency in some pixels (Summary slides and full paper).
  • Bill and Andrew will test our PMT module in magnetic field using laser test setup (Report status at July 12 DIRC meeting)

Charge 3: Have all the tasks needed to safely mount and operate the detector been identified and defined adequately?

• Recommendation 1: Provide an evaluation of the cooling requirements and confirm that the cooling will be adequate. If the cooling is not adequate produce an updated schedule that reflects the steps needed to provide a system that can be reliably and safely operated.
  • The power dissipated by each module is ~4 Watts, so the total in one optical box enclosure would be ~144 W.
  • Develop requirements for air flow and design to maintain a safe environment

• Recommendation 2: Water quality requirements and monitoring are necessary, should be carefully studied and a procedure documented.

• Recommendation 3: The procedure for integration of the DIRC into the GlueX DAQ has not been presented. A detailed plan for integrating the detector into the DAQ system should be developed. Similarly the integration of the DIRC into the slow control system was not thoroughly documented.
  • Setup meeting with Ben, Fernando, Sergey and Sasha to finalize plan for DAQ integration (Justin, Report at July 12 meeting)
  • Followup on controls with Nick and Hovanes

• Recommendation 4: Provide the projected background rate during high luminosity running and show the signal can be separated from the background.
  • From the TDR calculations, the maximum expected rate/pixel is ~17 kHz. Justin will update these estimates based on the final simulation geometry and EM background model
  • Analysis of the LUT results

Charge 4: Has the detector ownership, maintenance and control during beam operations been defined?

• Recommendation 1: Complete maintenance and operational Documentation

Charge 5: Are the responsibilities for carrying out each job identified, and are the manpower and other resources necessary to complete them on time in place?

• Recommendation 1: The optical Box delivery is the critical path for this installation. A contingency plan for late delivery needs to be available as well as an independent verification of the status of the Optical Box.

• Recommendation 2: Complete maintenance plans and training plans.

• Recommendation 3: Clarify which manpower is provided by non-JLab and JLab groups. Verify that the manpower and other resources will be available if the installation and/or commissioning schedule is changed.
  • Manpower for PMT installation and initial detector check is provided by non-JLab groups which are available both for an installation in August or November:
    • MIT: Yunjie Yang
    • W&M: Justin Stevens, Wenliang Li, and Andrew Hurley
    • CUA: Greg Kalicy?
    • GSI: ???

Charge 6: Are the specific documentation and procedures to operate safely and efficiently the detector, in place and adequate? This includes initial operation.

• Recommendation 1: Complete maintenance and operational Documentation including completion of OSP