Upstream field :
ATLAS-MM : LM2 out - comes back next year Jan/Feb.
Starting from 23 January (latest 30.1), 2 chambers returning. In upstream area U1
5 filters 50->1 (= one morning).
ALICE TPC : 6 chambers, (3 big, 3 small) - 2 at the same time, swap takes 45 minutes.
moving to test 2 big chambers in parallel
test restarted (unshadowed)
Total 20-30 (aiming for 6 per week, 1 day flushing, few hours for testing) - 5 weeks