Hardware Commissioning Day

Session

Session 3b: Powering, Power Converters, QPS&EnergyExtraction

19 Mar 2009, 12:00

AT Auditorium (CERN)

7. ELQA

Nuria Catalan Lasheras

19/03/2009, 12:00

•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?

8. Exceptional conditions during powering tests – the rules

Laurette Ponce

19/03/2009, 14:00

•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...

9. Quench Protection and Energy Extraction System

Knud Dahlerup-Petersen

19/03/2009, 14:30

•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?

10. How does it look altogether

Antonio Vergara Fernandez

19/03/2009, 15:00

•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?