JEF meeting, July 26, 2019

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Meeting time and location= 1:00 pm EST (JLab time) F228

Connection instructions

We are using BlueJeans Video/Audio conferencing. Our meeting ID number is 370588741. Click "Expand" for more details.

  • Make sure you have created a BlueJeans account via your JLab CUE account using this link:
  • If connecting via Web Browser: click this link (no passcode is needed):
  • If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
  • If connecting via Polycom unit:
    • Dial or
    • Enter meeting ID above


Crystal measurements (Josh)

S526 S530 Transmission.GIF S062 S070 2 Transmission.GIF


Attendees: Josh, Simon

  • Josh has been studying 2 sets of 5-6 Shanghai Ceramics crystals using a spectrometer in the ARC building that belongs to the detector group.
    • Images of a good set (S062-2070) and a bad set (S526-S530) are above.
    • Bad set some indication that some crystals were yellow -- corresponding drops in transmission seen.
      • Visual inspection need! Also need specs for transmission...
    • Supplier (Shanghai ceramics) samples transmission at 360 nm, 420 nm, 620 nm
  • Vlad has reported that 30% of Shanghai crystals needed to returned...