ePIC pfRICH General meeting

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Description

zoom: https://bnl.zoomgov.com/j/1619779791?pwd=TUtVak9TMjdsb05CbkVrZmh2a2JzZz09

recording: https://bnl.zoomgov.com/rec/share/yLV9q5zQewuJC6LU3BQ4rngaphWzSwJYGj1t4C63a5Vg2XV0Zf8Glcw4-v7tXgpa.MV1e5Xhr5LBo34Ec

Passcode: 4z.^A5AX
 
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Summary

The meeting focused on updates from Purdue and Stony Brook, including preparations for the upcoming beam test and the second iteration of the production process at Purdue, which will involve machining a single piece end ring for improved fit. Tolerances for the foam and end rings were stressed, and updates on the ion source progress and the test beam timeline were provided.

Key Points

  1. Meeting Agenda and Updates

    • Alexander introduced the agenda, mentioning regular updates from Purdue and Stony Brook, and Brian’s preparations for the beam test. (0:28)

  2. Second Iteration at Purdue

    • Alexander explained the production process for the second iteration at Purdue, focusing on machining a single piece rather than gluing pre-machined pieces, to improve the fit of the end rings. (7:46)

  3. Tolerances and Alignment

    • Prahkar emphasized the importance of considering tolerances for both the foam and end rings, noting that all elements must be accounted for to ensure a proper fit. (15:37)
    • Beni highlighted the need for precise bolt hole positioning to ensure alignment of the end rings with the beam line. (21:55)

  4. Ion Source and Test Beam

    • Preet provided updates on the ion source, including the mount, feed-through connections, and tasks related to mirror and thermal testing. (28:47)
    • Preet mentioned the expected improvements in reflectivity and uniformity after using the ion source, emphasizing post-deposition evaluation. (37:52)
    • Brian discussed the timeline for readiness for the upcoming test beam scheduled for May or June, emphasizing the need for preparation. (1:02:39)

  5. Pre-TDR Executive Summary

    • Alexander and Brian reviewed progress on the executive summary for the pre-TDR, noting the deadline and the need for contributions from the team. (1:20:24)

Next Steps

  1. Questions for Monday's Meeting

    • Charles to prepare a list of questions for Alex and Sushrut regarding the location and orientation of holes in the end plates, alignment with the asymmetric cutaway in the center, HRPPD, and the square compartment grid. (26:33)

  2. Thermal Cycling Tests

    • Sean, Bryan, Kong, and Preet to establish a routine for the first cycle of measurements on a throwaway sample, focusing on thermal cycling's impact on mirrors, including reflectivity, mechanical stress changes, and visible damage. This will help decide next steps for testing and insulation improvements. (42:13)
    • Sean to confirm the availability of the chamber for temperature cycling tests on smaller mirror samples. (48:45)

  3. Lab Space at Brookhaven

    • Brian to email Elka outlining the needs and timeline for lab space at Brookhaven, ensuring it is on her radar before discussions with Paul about space allocation. (1:18:54)

  4. Executive Summary Deadline

    • Brian to follow up with team members to complete outstanding sections of the pre-TDR executive summary, targeting an internal deadline in about 25 days. (1:21:51)
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