[Sbs_gems] [New Logentry] BB GEM layer 2 mapping issue discovered and resolved

jeffas at jlab.org jeffas at jlab.org
Sat Jan 21 10:40:02 EST 2023


Logentry Text:
--
After working in the hall on BB layer 2 yesterday we found that when the beam came back that layer 2 had a large hole in it, https://logbooks.jlab.org/entry/4114333. It turns out that I switched to cables during my access yesterday and forgot to switch them back so the GEM mapping was not correct. After switching the mapping in the software layer 2 is now working fine https://logbooks.jlab.org/entry/4114362. Therefore this was purely a software issue and all the data is fine. When we have a downtime again we should switch the cables back to their original position to avoid further confusion. For reference here is the mapping differences in the software DB.

OLD GEM MAPPING:
bb.gem.m2.chanmap = 
     20      11      11     104       0       3      29       1       1 
     20      11      11     104       1       2      28       1       1 
     20      11      11     104       2       1      27       1       1 
     20      11      11     104       3       0      26       1       1 
     20      11      11     104       4       7      25       1       1 
     20      11      11     104       5       6      24       1       1 
     20      11      11     104       6       5      23       1       1 
     20      11      11     104       7       4      22       1       1 
     20      11      11     104       8      11      21       1       1 
     20      11      11     104       9      10      20       1       1 
     20      11      11     104      10       9      19       1       1 
     20      11      11     104      11       8      18       1       1 
     20      11      11     104      12      14      17       1       1 
     20      11      11     104      13      13      16       1       1 
     20      11      11     104      14      12      15       1       1 
     20      11      12     104       0       3      11       1       1 
     20      11      12     104       1       2      10       1       1 
     20      11      12     104       2       1       9       1       1 
     20      11      12     104       3       0       8       1       1 
     20      11      12     104       4       7       7       1       1 
     20      11      12     104       5       6       6       1       1 
     20      11      12     104       6       5       5       1       1 
     20      11      12     104       7       4       4       1       1 
     20      11      12     104       8      11       3       1       1 
     20      11      12     104       9      10       2       1       1 
     20      11      12     104      10       9       1       1       1 
     20      11      12     104      11       8       0       1       1 
     20      11      12     104      12      14      14       1       1 
     20      11      12     104      13      13      13       1       1 
     20      11      12     104      14      12      12       1       1 
     20      11      13     104       0       3      26       0       0 
     20      11      13     104       1       2      27       0       0 
     20      11      13     104       2       1      28       0       0 
     20      11      13     104       3       0      29       0       0 
     20      11      13     104       4       7      22       0       0 
     20      11      13     104       5       6      23       0       0 
     20      11      13     104       6       5      24       0       0 
     20      11      13     104       7       4      25       0       0 
     20      11      13     104       8      11      18       0       0 
     20      11      13     104       9      10      19       0       0 
     20      11      13     104      10       9      20       0       0 
     20      11      13     104      11       8      21       0       0 
     20      11      13     104      12      14      15       0       0 
     20      11      13     104      13      13      16       0       0 
     20      11      13     104      14      12      17       0       0 
     20      11      14     104       0       3       8       0       0 
     20      11      14     104       1       2       9       0       0 
     20      11      14     104       2       1      10       0       0 
     20      11      14     104       3       0      11       0       0 
     20      11      14     104       4       7       4       0       0 
     20      11      14     104       5       6       5       0       0 
     20      11      14     104       6       5       6       0       0 
     20      11      14     104       7       4       7       0       0 
     20      11      14     104       8      11       0       0       0 
     20      11      14     104       9      10       1       0       0 
     20      11      14     104      10       9       2       0       0 
     20      11      14     104      11       8       3       0       0 
     20      11      14     104      12      14      12       0       0 
     20      11      14     104      13      13      13       0       0 
     20      11      14     104      14      12      14       0       0 


NEW MAPPING:
bb.gem.m2.chanmap = 
     20      11      11     104       0       3      29       1       1 
     20      11      11     104       1       2      28       1       1 
     20      11      11     104       2       1      27       1       1 
     20      11      11     104       3       0      26       1       1 
     20      11      11     104       4       7      25       1       1 
     20      11      11     104       5       6      24       1       1 
     20      11      11     104       6       5      23       1       1 
     20      11      11     104       7       4      22       1       1 
     20      11      11     104       8      11      21       1       1 
     20      11      11     104       9      10      20       1       1 
     20      11      11     104      10       9      19       1       1 
     20      11      11     104      11       8      18       1       1 
     20      11      11     104      12      15      14       1       1   <--- Changed 
     20      11      11     104      13      12      13       1       1   <--- Changed 
     20      11      11     104      14      13      12       1       1   <--- Changed
     20      11      12     104       0       3      11       1       1 
     20      11      12     104       1       2      10       1       1 
     20      11      12     104       2       1       9       1       1 
     20      11      12     104       3       0       8       1       1 
     20      11      12     104       4       7       7       1       1 
     20      11      12     104       5       6       6       1       1 
     20      11      12     104       6       5       5       1       1 
     20      11      12     104       7       4       4       1       1 
     20      11      12     104       8      11       3       1       1 
     20      11      12     104       9      10       2       1       1 
     20      11      12     104      10       9       1       1       1 
     20      11      12     104      11       8       0       1       1 
     20      11      12     104      12      15      17       1       1    <--- Changed
     20      11      12     104      13      14      16       1       1    <--- Changed
     20      11      12     104      14      13      15       1       1    <--- Changed
     20      11      13     104       0       3      26       0       0 
     20      11      13     104       1       2      27       0       0 
     20      11      13     104       2       1      28       0       0 
     20      11      13     104       3       0      29       0       0 
     20      11      13     104       4       7      22       0       0 
     20      11      13     104       5       6      23       0       0 
     20      11      13     104       6       5      24       0       0 
     20      11      13     104       7       4      25       0       0 
     20      11      13     104       8      11      18       0       0 
     20      11      13     104       9      10      19       0       0 
     20      11      13     104      10       9      20       0       0 
     20      11      13     104      11       8      21       0       0 
     20      11      13     104      12      14      15       0       0 
     20      11      13     104      13      13      16       0       0 
     20      11      13     104      14      12      17       0       0 
     20      11      14     104       0       3       8       0       0 
     20      11      14     104       1       2       9       0       0 
     20      11      14     104       2       1      10       0       0 
     20      11      14     104       3       0      11       0       0 
     20      11      14     104       4       7       4       0       0 
     20      11      14     104       5       6       5       0       0 
     20      11      14     104       6       5       6       0       0 
     20      11      14     104       7       4       7       0       0 
     20      11      14     104       8      11       0       0       0 
     20      11      14     104       9      10       1       0       0 
     20      11      14     104      10       9       2       0       0 
     20      11      14     104      11       8       3       0       0 
     20      11      14     104      12      14      12       0       0 
     20      11      14     104      13      13      13       0       0 
     20      11      14     104      14      12      14       0       0 

---

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