sPHENIX discussion of electronics

[eric mannel <mannel AT bnl.gov>]

Jordan sent me a list of 7 trays (listed below) that were inspected using the new pickup tip and shipped to BNL.  I took a look at all 7 and took pictures of 6 (just forgot to snap the last one before putting it away). All but 1 tray (tray #275) showed significant improvement in the handling.  The semi-circular marks appear to be gone, however, on some of the devices there are still "point like" defects om some of the devices that vary in location.

Given the size of the pictures, I posted them to the SiPM delivery document in docDB, https://docdb.sphenix.bnl.gov/cgi-bin/private/ShowDocument?docid=159

Eric

-------- Forwarded Message -------- Subject: Re: First SiPM shipment Date: Fri, 16 Aug 2019 13:02:51 -0400 From: Jordan Roth <jdroth AT umich.edu> To: eric mannel <mannel AT bnl.gov>

Yes. Trays 275, 166, 250, 385, 169, 253, and 388 were tested with the new head.

Day, Jordan

On 8/15/19, eric mannel <mannel AT bnl.gov> wrote:

Jordan-

Thanks.   Were any of these trays tested with the new pickup head?

Eric

On 8/15/19 3:54 PM, Jordan Roth wrote:

Hi Eric, we are shipping out 71 full trays today. Trays are grouped
into Vop lots: each stack of trays is labelled. The FedEx tracking
number is 813856887228. The box should probably arrive tomorrow.

Have a good day, Jordan

-- Eric Mannel, Ph.D. PHENIX Group Dept of Physics Brookhaven National Lab. 631/344-7626 (Office) 914/659-3235 (Mobile)