1. Guidelines defined early Dec 2012
Preparation for TS#4
Guidelines defined early Dec 2012
Possible impact from others:
EL: 19Dec’13 07h, yearly test of safety powering
CV: plus our request for maxi 2 pumps and reduced temperature
CRYO: criteria to be evaluated:
Work to be made on your site (site specific)
Highest availability over Xmas (less plants required!)
Possible redundancy over Xmas (2nd plant in cold stand-by?)
Configuration foreseen for restart Jan’13 (1 or 2 sectors per cryoplant?)
Guidelines for January 2013:
Monday evening: ≈ 200mbar / 3.3 K
Tuesday evening: ≈ 60mbar / 2.5 K
Wednesday evening: <20mbar / 2.1 K then 1.95K
BUT would be appreciated if 2 sectors in cascade
Tests (a priori before Xmas):
DFBA’s internal connections, 60A in with
Done, under evaluation
Done, OK
Well under control, only minor interventions required on top of periodic checks/adjustments
So far as foreseen or better, with 5 sectors at 200mbar, 2 at 110mbar, 1 at 70mbar
And 3/4 RF modules with 30K GHe
08Jan'13
CCC 8h30 meeting

2. Evolution over Xmas Tech Stop #4
P4, internal mini cryo issue, treated by on call operator
Most quiet Xmas of the last 4, but many people involved including LUCK and calm weather!
No special helium loss, no damage to HW, on tracks for recool-down
Tech Stop #4
08Jan'13
CCC 8h30 meeting

3. Forecasts for this week
RF:
45: 2 modules to be filled this Tuesday 8th
34: cool-down of last module to 30K to be done, filling with LHe (both) for Wed.9th
DFB’s and Stand-Alone Magnets::
Filled with LHe as soon as capacity allows
ARCS:
12: to be pumped below 20mbar this Tuesday 8th, CS/CM for Wed.9th
56/67: pumping to 20mbar Tues.8th, CS/CM for Thursday 10th
Others: progress with steps
34: some work on CC this morning
Beam screen circuits:
Cryo bake-out for all once below 3K for arcs/ITs or above 50% LHe for SAMs
08Jan'13
CCC 8h30 meeting