I am following Rosi's excellent instructions, with modifications for four crates.

1) Log on to the startrg computer and set all the TAC offsets to zero, by soft-linking the eqX_tac.dat files to files that have all zeros in them.

2) Ask shift crew to take pedestal_rhic_clock_clean, to have these things loaded.  Importantly, they should only include TRG and DAQ into that pedestal run.  Leave the TPC and other pedestals alone.

3) Have the shift crew take a run with 500k events, with BBC trigger (*not* EPD trigger!), with DAQ and TRG only.  (No harm if other detectors are included, but not needed.)  The run they took (104) was with the "tune" configuration, which is screwed up.  So Rosi found a better one: 25119113

4) On an online node, run the EpdReader to make the epdhist.*.root files, and then hadd them.  Then make a "mapped" epd histo with map_EpdHistos.C.  Code at /ldaphome/lisa/EpdReader2024 on the online nodes.

5) To transfer it to my Mac.
   a) First, get the mapped.root file from the online machine to the bnl gateway machine.    b) Then, on my Mac, pull it from the bnl gateway
6) Then run Rosi's macro MakeTacOffset.C (get it from her blog), which makes the new offset files
It makes tacoffsetsX.txt (X=1,2,3,4).  They are attached to this page.  It also makes ADCTAC.pdf, which is too large to attach and hard to compress.  It shows slewing curves like the following:




7) Upload the tacoffsetsX.txt files to the startrig computer
   a)  From my laptop:   b) From startrig computer, in /home/startrg/staruser directory: 8) Set the soft links to use the new files.