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ePIC pfRICH Engineering/Design Meeting
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US/Eastern
Description
https://jlab-org.zoomgov.com/j/16028326423?pwd=cmpHc0s3cWMyQWV0enhvQlVmeVJpQT09
Meeting ID: 160 2832 6423 Passcode: 3DdgRUoscP
Meeting Recording:
Passcode: VC0YKGv&
Summary
The meeting covered updates on a new nylon mesh and silicon sealant for the HRPPD and sensorplate, and discussed the need for finite element analysis (FEA) to ensure structural integrity with a design change involving an o-ring groove. Results from thermal testing of mirror substrates were shared, focusing on reflectivity and deformation, with emphasis on understanding CTE mismatch and temperature ranges for failure. Additionally, budget concerns for the laser monitoring system were highlighted, leading to a discussion on implementing a staging approach before costly purchases. Progress on the TDR executive summary was also reviewed.
Key Points
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Nylon Mesh and Silicon Sealant Options
- Sushrut introduced updates on a new nylon mesh and silicon sealant, explaining that several options will be sent to BNL for further evaluation. (0:00)
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Finite Element Analysis (FEA) for O-Ring Groove
- Sushrut stressed the need for FEA related to a potential design change involving an o-ring groove, highlighting its importance for maintaining structural integrity. (1:22)
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Thermal Testing of Mirror Substrates
- Preet shared results from thermal testing, focusing on reflectivity and deformation observed during tests. (4:52)
- Sushrut elaborated on the role of CTE mismatch in causing internal strains and permanent deformation, stressing the need for further analysis. (20:51)
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Temperature Ranges for Failures
- Brian emphasized the importance of identifying temperature ranges where failure occurs, suggesting that rapid temperature changes should be tested. (24:19)
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Budget and Staging for Laser Monitoring System
- Bill provided an update on the PED for the laser monitoring system, discussing budget limitations and project priorities. (39:53)
- Alexander inquired about the possibility of a staged approach before making expensive purchases, which led to a discussion on using on-the-shelf components initially. (44:26)
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TDR Executive Summary Progress
- Brian provided an update on the TDR executive summary, outlining sections that need attention and stressing the upcoming deadline. (47:18)
Next Steps
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Thermal Testing Continuation
- Bill to ramp the Stony Brook samples until they deform, with Preet overseeing the testing process. (16:08)
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Epoxy Selection for Bonding
- Preet to confirm the specific epoxy used for bonding, considering the variety of options from the TPC project to ensure the best selection. (22:51)
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PED Review
- Alexander to review the PED draft submitted by Bill and provide feedback or approval. (44:26)
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TDR Section Contribution
- Bill to collaborate with Brian on writing a brief description of the laser monitoring system for the Calibration, Alignment, and Monitoring section of the TDR. (51:04)
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