2010 hardware commissioning overview
DESCRIPTION
2010 Hardware Commissioning Overview. Matteo Solfaroli (CERN), Marco Zanetti (MIT). Outline. SD -> HWC transition What has to be commissioned RRR measurement and other special tests Schedule Shifts. From SD to HC. - PowerPoint PPT PresentationTRANSCRIPT
Matteo Solfaroli (CERN), Marco Zanetti (MIT)
2010 Hardware Commissioning Overview
Outline
SD -> HWC transition What has to be commissioned RRR measurement and other special tests Schedule Shifts
From SD to HC
SD coordination will manage a given sectors up to the de-condemnation of the power converters This includes ElQA of the main circuits and cable
connection “Yellow papers” handled by SD coordination
Once in the hands of HWC coordination, the whole sector is considered ready-to-power Correctors left behind (if any) will be managed case by
case
From that moment, locking of the circuits (if ever needed) would be managed by HWC coordination
What has to be powered?
Whatever has not been commissioned to 3.5 TeV equivalent current. The list boils down to: All RQD/F and RB Very few remaining correctors
Mains: standard procedure + type tests required by nQPS
Triplets: all commissioned to 3.5 TeV but test procedure to be completed for 5 IT
Correctors: the list of circuits that follows has been obtained merging info form MP3 (Jean-Philippe, Nuria) and HWC results and confirmed by optics expert To be done in the shade of the mains, not accounting in
the time-budget
RB and RQD/F (re-)Commissioning
Extra step(energy extraction) at 4 kA
Are we going to have the calorimetric step?
Triplets
Only 5 not fully commissioned in 2009 RQX.R1 (quench heater problem) has reduced
current but still enough for 3.5 extra DCCT in triplet in R8 and L1 to measure the
individual currents
Correctors
Status can/should be powered
RU.L4powered up to 400 A, full commissioning procedure needed YES
RU.R4 boil-off done and being analyzed YES
RCBXH3.L5PC problem, to be investigated and then commissioned YES
RCO.A78B2 non-conform (Chamonix 2009), can not be powered NO
RCO.A81B1 ready to be commissioned YES
RCO.A81B2 Open circuit, cannot be used NO
RQS.R3B1 non existing NO
RCBH31.R7B1 ElQA issue (too resistive) NO
RCBCHS5.L8B1 warm magnet instead NO
RCBCV10.R4B2 resistance at the limit, PNO.a1 to be repeated YES
RCBYV5.L4B2non-training quench around 63 A. I_PNO could be reduced YES
RCOSX3.L1 ElQA non conformity NO
RCSSX3.L1 Several trips at 63 A. Analysis ongoing YES
Circuits not fully commissioned from the list in the HWC commissioning web page
Correctors
Circuits fully commissioned but that we may consider to (partially) re-commission
Status
RQTL9.R3B2commissioned to 400 A. Nuria proposes to push it to 550 A (PC problem?)
RQT13.R8B1commissioned to 400 A. Nuria proposes to push it to 550 A (PC problem?)
RQT13.L5B1commissioned to 400 A. Nuria proposes to push it to 550 A (QPS problem?)
RQT13.R5B2 quench during operations, to be looked at
RQTL11.R2B2cryo valves issue. Special test after exchange?
The remaining circuits commissioned with reduced parameters are fine for 3.5 TeV operations
RRR measurement test (MK&BF)
Idea: measure resistance of some busbars by means of nQPS injecting low current at higher temperature
3 controllable power converters in parallel with main PC Dipoles: 10A-300V Quads: 10A-10V
Voltage measurements done using nQPS in logging mode
Temperature should rise to at least 10K. Logging via the available sensors
The duration of the test will be as long as cryo needs to raise to ˜10K (2 days?) and back down again (2 days?) Test to be performed as soon as nQPS is qualified and phase I
is done The suggested place is sec 81:
Pros: first coming available (no impact on the schedule), the only one with all the T sensors installed
Contras: no warm temperature measurement available
Motivation: The value of RRR has direct impact on the energy the LHC can safely run at
PGC
All steps to be done in all sectors (reminder: at this stage we have an heater-provoked quench on MB at high current)
To be done after finishing the tests on the individual circuits
As last year, transition phase between HWC and operations. Some contingency in the schedule
Schedule
Shifts
2 shifts mode as soon as powering tests start (Thursday)
Weekend shifts since the beginning (BUT for next Sunday)
Night shifts starting on January 27 Shifts during conferences:
Evian: 2 “extended” day shifts (MZ as EiC) Chamonix (25 and 26 Jan): either only 1 shift per day
and/or days devoted to accesses and software updates
Access shift: QPS-cable shift starts at 6.30, how to deal with that?
Regular MP3 shifts during phase II and I Do we need EPC shifts?
Special tests
Type test on one 120A circuit (1 whole day) by pulling cables to feed the circuit with a 600A power converter (Y.Thurel)
Other special tests: measurement of RQ current ripple voltage across switches for RB and RQF/D
Conclusions
2010 HWC campaign about to start Schedule looks sound and feature some
contingency More precise time estimation as soon as nQPS will
be set operative in the first sectors