Update on iTPC aging in Run XIX

Updated on Fri, 2019-11-01 10:43. Originally created by fisyak on 2019-11-01 10:43.

I have reported last May about observing aging effect in iTPC in Run XIX
https://drupal.star.bnl.gov/STAR/blog/fisyak/itpc-aging

Now I have an update based on whole statics of RunXIX. I see a significant drop in gain (~8%).