MIP-less BTOW towers 

Forum: EMC2 Sub-Systems (backup 2003-2005)
Date: 2005, Nov 09
From: Jan Balewski <balewski@mit.edu>

FYI, Few weeks ago Adam provided me with the list of ~190 so called MIP-less towers, i.e. towers with reasonable raw spectrum but empty if MIP condition based on TPC tracks is required. http://www.star.bnl.gov/~balewski/2005_BTOW/noMipGoodSlope.Adam I ask DB for all available information for those towers and reordered Adam's list by the crate # (aka box) and channel # http://www.star.bnl.gov/~balewski/2005_BTOW/noMip.byCrate Empty lines separate crates. The first column gives geographical location of the BTOW towers following the endcap scheme: sector 1-12, subsector 'a' - 'j', eta bin 1-40. It matches TPC sectors (up to few deg in phi) The 2nd & 3rd columns give crate # and channel #, respectively. The softID is in the second to the last column. One me identify groups of 8 consecutive channels, e.g. crate 0x06 ch :0x10-0x17 & ch:0x90-0x97 . It is very natural to assume a hardware swap for a pairs of connectors. The swap of 2 connectors is equivalent to swap of towers separated by 20-4=16 eta bins: #name, crate,chan, 08td20 0x06 0x10 with 08td04 0x06 0x90 Another possibility is 180 deg rotation of connector equivalent to swap of towers separated by 3 bins in eta and 1 bin in phi: #name, crate,chan, 08td20 0x06 0x10 with 08te17 0x06 0x17 In both cases the special separation is much larger than TPC resolution, so one would expect no matched MIP's There is at least 12 group of 8 consecutive channels on this list - i.e. ~100 out of 190 MIP-less towers identified by Adam. Adam tried to swap pair of connectors for the crate 0x06 listed above and for limited statistics nothing improved, right? Would be good to see plots before & after swap for this 16 towers and for another 'good' 16 towers for which the MIP peak is seen. Well , perhaps the 180 rotation is worth to try? If it also fails one needs to dig deeper, I think. Jan

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1. Re: MIP-less BTOW towers by Will Jacobs, 2005, Nov 09

1. Re: MIP-less BTOW towers by Jim Sowinski, 2005, Nov 09

(_ Re: MIP-less BTOW towers by Jan Balewski, 2005, Nov 09

2. Re: MIP-less BTOW towers by Adam Kocoloski, 2005, Nov 09

1. Re: MIP-less BTOW towers by Michael Miller, 2005, Nov 09

1. Re: MIP-less BTOW towers by Jan Balewski, 2005, Nov 09

2. Re: MIP-less BTOW towers by Adam Kocoloski, 2005, Nov 10

1. Re: MIP-less BTOW towers by Jan Balewski, 2005, Nov 11

(_ Re: MIP-less BTOW towers by Adam Kocoloski, 2005, Nov 11

(_ Re: MIP-less BTOW towers by Jan Balewski, 2005, Nov 11

1. Re: MIP-less BTOW towers by Alexandre A. P. Suaide, 2005, Nov 11

2. Re: MIP-less BTOW towers by Adam Kocoloski, 2005, Nov 11

3. Re: MIP-less BTOW towers by Stephen Trentalange, 2005, Nov 29

1. Re: MIP-less BTOW towers by Andrew Vander Molen, 2005, Nov 30

1. Re: MIP-less BTOW towers by Jan Balewski, 2005, Nov 30

1. Re: MIP-less BTOW towers by Andrew Vander Molen, 2005, Nov 30

(_ Re: MIP-less BTOW towers by Jan Balewski, 2005, Nov 30

1. Re: MIP-less BTOW towers by Adam Kocoloski, 2005, Nov 30

1. Re: MIP-less BTOW towers by Andrew Vander Molen, 2005, Nov 30

(_ Re: MIP-less BTOW towers by Adam Kocoloski, 2005, Nov 30

(_ Re: MIP-less BTOW towers by Andrew Vander Molen, 2005, Nov 30

2. Re: MIP-less BTOW towers by Andrew Vander Molen, 2005, Nov 30

1. Re: MIP-less BTOW towers by Adam Kocoloski, 2005, Nov 30

2. Re: MIP-less BTOW towers by Alexandre A. P. Suaide, 2005, Nov 30

1. Re: MIP-less BTOW towers by Jim Sowinski, 2005, Nov 30

2. Re: MIP-less BTOW towers by Andrew Vander Molen, 2005, Nov 30

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