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No.Main WBSSubject/ActionDate RequestedNeed dateResponsible EngineerResponsible PI (to be cc'ed in case of request to anothe engineer)Responsible WBS Manager (to be cc'ed in case of request to anothe engineer)Comments / Reponse / UpdateDate Closed
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1TPCEngineers need to check the weights of their items in the TPC Assembly Mass and Buoyancy Analysis report and inform Nina if revisions are required (e.g. weights or volumes not correct, things missing, etc..).11/23/202312/5/2023AllAllAll[Nov 23, 2023] If in the course of checking your items, you see other things that might need revision plese include them in your email to Nina.
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2TPCEngineers need to inform Nina when there are design changes the impact the weights of their items in the TPC Assembly Mass and Buoyancy Analysis report.11/23/2023On-goingAllAll
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3Vertical Support RodsNeed the forces in the springs on the vertical support rod system at room temperature, at operating temperature without liquid argon, and at operating temperature with liquid argon.11/23/20231/15/2024John B LucaLuca[Nov 23, 2023] It is appreciated that final numbers might not be available by end of 2023, but suggested interim values would be helpful.
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4TPCNeed agreement on codes, standards, and regulations that govern the design and construction of the Inner Detector and Tools11/23/202312/15/2023LucaLuca
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5PMMA and Gd PMMANeed agreement on allowable stresses in PMMA and Gd PMMA11/23/202312/31/2023Dave RAkselLuca
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6AnodeNeed estimate of the temperatures at the top and bottom surfaces of the anode during operation.11/23/20231/31/2024Kevin[Nov 23, 2023] This is required in order to determine the required travel for the active anode adjustment system.
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7AnodeNeed estimate of the temperatures at the top and bottom surfaces of the anode during cool-down and warm-up11/23/20233/1/2024KevinLuca[Nov 23, 2023] This is required to ensure that the thermal deflections do not cause the anode to deflect into the wire grid or top optical plane.
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8Anode/wire gridNeed the minimum required separation during various steps in construction and testing11/23/20232/1/2024LucaLuca[Nov 23, 2023] This is required to establiish that desired "machined" shape of the anode. The separation should consider the sagging of the wires sagging of the anode. The clearance requirement may be governed by electrical testing or the need to avoid physical contact.
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NEEDS FOR PUSHING WITH TOP OPTICAL PLANE CONCEPT
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9AnodeControlling shape of anode by pushing down with top optical plane: need FEA to confirm deformations/rigidity and FEA to confirm contact forces of pillars on anode. 12/1/2023
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10AnodeDesign needs to allow for horizontal movement during cooldown - check for failure of pillars by side loading12/1/2023
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11AnodeFinalize design of stiffening system to check for deal breakers12/1/2023
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12AnodeNeed preliminary design for active adjustment system12/1/2023
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13AnodeRisk evaluation of different options12/1/2023
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NNEDS FOR USING BARREL FOR PLANARITY
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14AnodeNeed anode separation distance from wires 12/1/2023
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15AnodeTemperature differential across anode during cooldown12/1/2023
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16AnodeNeed to define penetrations of active adjustment system 12/1/2023
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