Hardware Commissioning Day

•Scenarios: commissioning to 450 GeV and 4…5 TeV, high currents only to 4TeV initially
•How to decide to go to 5 TeV?
•What about circuits with “small” current? 4 TeV- 5 TeV?
•Key dates in preparation and outlook to planning
•LHC operation during the winter 2009/10

•Overview: what changed during the shut-down? Modification to the powering system?
•Impact of sector 34 repair on ELQA, inductance tables, …..
•Parameters, ramp speed and acceleration
•Update of installation of nQPS, UPS
•Other modification: DN200, others

•Organisation of hardware commissioning, meetings, …
•What happens before powering tests after cooldown
•Commissioning of Warm sectors, Cold sectors and sector 34: what needs to be done? What can be dropped?
•When should we work: 2 shifts during 5 days versus 3 shifts during 7 days, MPP analysis, what can be done in a nightshift – WE? Bottlenecks in manpower
•Rules for patrols during powering tests

•Tunnel access during powering – what areas can be accessed during powering as a function of current / energy in the different circuits? Clear and transparent rules
•Matrix between powering and access (where not to go when?)
•Document to be provided

•Powering phase I at low current: How to ensure that the current does not exceed the “safe” value?
•Powering phase II: How can we be sure that nobody is in when we power?
•Underground access during powering phase I and II for interventions: How to ensure that we do not power a circuit during such intervention (such as with the PIC)?
•Underground access during commissioning of the powering system? Is it required? (EE switches, cut water, triplet…)
•Hardware commissioning using the access system
•Set the rules for access, different modes, transition from shutdown to commissioning/operation

•Changes in safety procedures (ADI, …)?
•Recall consignation
•Who does it? Gerard Pastor for commissioning? Interventions during night and weekend?
•Setting hardware limits for the current of power converters during powering
•Tests of UPS – working as expected?

•Cryogenic calorimetric measurements: view for 2009, automation? Can we increase the accuracy?
•Operation overnight and over the weekend: any constraints? Presence of operators and experts in the CCC?
•Consolidation: impact on re-commissioning and operation (DSLC, stand alone magnets, inner triplets, Y-lines, …)

•What is new?
•What needs to be repeated? Warm sectors, cold sectors, sector 34?
•ELQA for 5 TeV: problems to go to 1.9 kV? Better to reduce the tests to 1.6 kV?
•Monitoring during cool-down, what circuits, what sectors in parallel?
•HV tests in case of late symmetric Q-detector installation? To be discussed with QPS experts.
•Planning ELQA: One sector at the time? Stand alone first, arc later?

•Can we force signals to provide CryoStart and CryoMaintain – when is it permitted? How to ensure that no equipment will be at risk?
•Can we mask CryoStart and CryoMaintain? Under what conditions? How to ensure that no equipment will be at risk?
•When to block / unblock circuits?
•What are the rules? Notification, approval, who is authorised to do it, …..
•How to document such exceptional conditions?

•nQPS, impact – how to commission it? IST and powering tests
•new software: QPS snapshots, splice resistance measurements
•impact of upgraded UPS on QPS commissioning
•anything new on old QPS?

•When can we start?
•How long will it take?
•Before nQPS: early measurements of bad splices with Cryogenic calorimetric measurements in sector 23 and 45 – when and how?
•How long from 4 TeV to 5 TeV? How many steps to be done? Impact on commissioning?

•List of non-conformities
•How to solve them? Actions underway?
•How do we track them?
•Implication of non-conformities? Something that stops us to run at 4/5 TeV?

•Bad splices in magnets and interconnects
•What methods, what accuracy?
•What is a “bad” splice? Repair is required if the resistance is larger than… for 450 GeV, 4 TeV and 5 TeV. To be defined before the start of tests
•Procedures for other circuits

•Procedures for main dipole and quadrupole circuits – what changes?
•Procedures for other circuits
•Where are we with the procedures?
•Impact on software (sequences, …)