sPHENIX Event Plane Detector discussion

[Rosi Reed <rosijreed AT lehigh.edu>]

Hi JaeBeom,

Thank you for this summary - which of these channels had the bit flip in last year's data?  (Is it always the same bit that is flipped, or a different one in each board?)

Cheers,

Rosi

On Mon, Feb 5, 2024 at 5:36 PM Park, JaeBeom <jpark4 AT bnl.gov> wrote:

Dear all,

Please find the summary of the 2 weeks (Jan 22th - Feb 2nd) calo-workfest below regarding calorimeter electronics related items. 

Calorimeter electronics

1) 19 new ADC boards installed in the emcal high-eta region (still missing final 13). Detailed location below : link

2) New ADC initialization procedure using caloserver fixed bit shift problems (which made up the majority of problems in 2023 data)

3) 5 hardware problematic boards (bit flip) found : 4 in emcal / 1 in sepd. The 4 boards in emcal were swapped with the good ADC boards in the sepd crate to avoid firing calo-triggers     

— Bit flipped channels are recoverable offline

— Note to not zero-suppress these channels (now 5 in total for sepd     

— Detail location of boards : 

Old location					New location
Rack	Crate	Slot	Ch	Idx	Rack	Crate	Slot	Ch	Idx
1E3	2	1	30	E169257	3B2	1	5	30	E157822
1W1	1	18	8	E169323	3B2	1	4	8	E157850
1W3	1	7	30	E169302	3B2	1	8	30	E169446
1W3	1	19	29	E157844	3B2	1	7	29	E169255

4) No bit shift nor bit flip problems anymore in emcal & hcal.1 board in 1W1 having an issue on half of the channels and needs investigation.
5) New XMIT clock, event counter of 32-bit tested with the test stand in the rack room
— Further tests needed + discussions of reprogramming all XMITs (pulling out ~150 boards)
6) Plan to replace one backplane at 1W1/Crate 0 because of bent pin (Eric coordinating)
7) New PAR3, DCM2, jseb2-D boards, optical fibers & busy cables tested successfully
    Extra kudos to Chi at Nevis!
8) New orders in place for ADC boards & trigger daughter cards
— 25 new ADC boards (not for this year, only likely in 2025) - Eric coordinating
— 50 new trigger daughter cards (for this year) - Eric coordinating

Best,

Calo-workfest team 

===============================
|| JaeBeom Park
|| Postdoctoral Associate 
|| University of Colorado Boulder
|| E-mail : jpark4 AT bnl.gov
|| Phone : (934) 386-1466
===============================

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Rosi Reed
Associate Professor, Physics Department
Lehigh University
(610)758-3907
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Bethlehem, PA 18015

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