SBS Weekly
January 5, 2017

Present

Seamus, Fuchey, Cornejo, Wojtsekhowski, Dutta, Annand, Puckett

Agenda - Bogdan, ECal lightguides

Presents overview of ECal issues and progress
Have been using Borosilicate33, worked with vendor to get acceptable quality

Cracks would form with present lightguides, glue curing is 550C likely due
to differences in thermal expansion coefficients between block and lg

Moving to BK7 glass - Obtained 50 Dec 19

Tried and found no cracks even under thermal cycling

Has better radiation hardness