A. Perin, TE-CRG, YETS meeting 15.09.2015

CRG activities for YETS 2015

September 15th 2015

Year End Technical Stop (YETS) Meeting

A. Perin, TE-CRGm with contributions from M. Pezzetti, N. Vauthier, G. Ferlin, U. Wagner.

A. Perin, TE-CRG, YETS meeting 15.09.2015

CRG preparation of YETS2015

• Preliminary preparation phase: not all defined.

• An additional round is necessary in about 4 weeks

• Activities classified in two categories:

A) Affecting other non-CRG systems (no CS/CM): this is the main subject for coordination

B) CRG internal «transparent» for other systems

N.B.: activities are also planned on experiments (mainly CMS)

A. Perin, TE-CRG, YETS meeting 15.09.2015

S. Claudet, T

E-CRG

06.08.2015

A. Perin, TE-CRG, YETS meeting 15.09.2015

LHC YETS overview

Strategy

• Cryostart / cryomaintain until week 46.

• Baseline: keep the helium in the magnet cryostats at 4.5 K. Exception if a warmup od S81 is required to fix the 15R8 problem.

Main issues to be corrected

• Leak in IP8 A cold box: will require warmup of the cold box. Cryoplant B still operational.

G. Ferlin

, TE-CRG-O

A

A. Perin, TE-CRG, YETS meeting 15.09.2015

InstrumentationCatégorie A

• Mise en service des capteurs Basse Pression nécessitant les supports CRG-OA pour installation + support EN-ICE/BE-CO/CRG-CE pour Layout/FEC/PVSS

• Installation capteur de pression ATLAS UX15 nécessitant les supports CRG-ME pour installation + support EN-ICE/BE-CO/CRG-CE pour Layout/FEC/PVSS

• La consolidation des EH 500W/100W dans les triplets nécessitant les CRG-OA pour installation + support EN-ICE/BE-CO/CRG-CE pour Layout/FEC/PVSS

Catégorie B

• Les events concernant l’intrumentation cryogénique listés sur le logbook*: > 100 corrective actions foreseen

Essentially in the shadow of other activities and when access is possible.

N. Vauthier, T

E-CRG-CI

A. Perin, TE-CRG, YETS meeting 15.09.2015

YETS Main activities • Cat A

• P18/P2 QURC consolidation for VFD, equipotential (for ECM issues not yet solved);

• P18 QSCB equipotential cabling for motor-compressor consolidations;

• P6 QSCB equipotential cabling for motor-compressor consolidations;

• P8 QSC surface 24 VDC redundant;

• P8 QSCB equipotential cabling for motor-compressor consolidations;

• Cat B• LHC sector redeployment for EH consolidations (see CI section) ( need 1/2 day

control stop per sector)

Control & electricity

M. Pezzetti ,

TE-CRG-OA

Essentially in the shadow of other activities with short and localized interruptions of cryo.