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Interlock commissioning

Interlock commissioning. J. Wenninger AB-OP-SPS First ideas on interlock commissioning…. MPS Commissioning. MPWG aim : define approved procedures for MPS system commissioning, to be applied at LHC & SPS.  CNGS =

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Interlock commissioning

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  1. Interlock commissioning J. Wenninger AB-OP-SPS First ideas on interlock commissioning… CNGS Comm. Comm. / J. Wenninger

  2. MPS Commissioning MPWG aim : define approved procedures for MPS system commissioning, to be applied at LHC & SPS.  CNGS = The LHC Hardware Commissioning procedures are used as guidelines to structure the MP commissioning. Tests are classified in categories : • Individual System Tests (IST) • Defined by the expert/responsible of each system. • Performed on each system in a standalone configuration. • Hardware Commissioning Tests (HCT) • Involve more than one system. • Defined by the people who are responsible for the systems that are involved. Results are documented in MTFs (Manufacturing Test Folders) within EDMS. CNGS Comm. Comm. / J. Wenninger

  3. Interlock commissioning – first steps The first steps towards the definition of test procedures have started within the MPWG on the following subjects : • Beam Interlock System (BIS) – [B. Todd] : • Commissioning is split into 4 phases. • First 2 phases  IST – BIS in standalone. • Third phase  BIS + beam dumping system. • Fourth phase  BIS + all ‘clients’.  procedure must be adapted for the transfer lines (no beam permit loop). • Transfer line interlocks – [J. Wenninger] : • Concentrate on HC and Beam Commissioning (BC) level. • ‘Rather’ complete list of tests. First (private) draft documents exist (LHC functional spec format). Next step : consistent definitions & structures. CNGS Comm. Comm. / J. Wenninger

  4. Presently confirmed interlock list Extraction channel & SPS ring : • Beam position in extraction bump (M) • Settings of orbit bumpers (M) • Beam loss in extraction channel (M) Transfer line & target : • Vacuum • Extraction kicker • TEDs & TBSEs • CNGS decay tube shutter • CNGS target assembly • Internal PC surveillance (M) • Fast current change monitor (FMCM) (M) • Magnets • Horn • Beam losses (M) • Position at target, trajectory (M) • Screen positions (M) • Hadron stop cooling (M) = maskable CNGS Comm. Comm. / J. Wenninger

  5. TL Intlk. Comm. : Who We need a IC team responsible for the commissioning. Presently : • J. Wenninger (overall coordination – I guess …) • R. Giachino • B. Puccio/B. Todd (BIS + HW links) I may drag in another SPS-OP member ( spread knowledge). Responsibility : • Verification & validation of HC & BC tests. • Documentation of test results. • ISTs : to be defined… System experts are responsible. On ‘paper’: procedures must be defined for each system. IC team must ensure that ‘minimum’ documentation exists. If necessary IC team must request some add. ISTs to be performed. CNGS Comm. Comm. / J. Wenninger

  6. ISTs & BIS connections • IST should be performed during the HC phase. • System experts are responsible for defining appropriate tests and the periods of the tests. • Each client system connection to the BIS must be tested during the HC period. CNGS Comm. Comm. / J. Wenninger

  7. HC & BC tests Mandatory conditions for HC & BC tests : • The system is connected to the BIS (connection tested). ISTs have been performed successfully. • The BIS is operational. • The control system is available (must be possible to test from CCC) : • BIS supervision. • Machine timing system (time-stamping & synchronization). • For certain systems (PCs…) : trim & diagnostics application. Optional conditions : • Logging system operational (for BIS & system under test).  test ‘tracing’ & documentation. If we insist on the ‘optional’ condition : from experience this means we have to start the tests at the very last moment, i.e. during the beam commissioning period. CNGS Comm. Comm. / J. Wenninger

  8. HC tests • HC tests do not require beam (by construction). • The majority of MPS tests are HC tests. • The system that requires the largest number of tests : power converters. • Rough & very preliminary time estimate : 4-6 shifts (non-stop !) If we do not insist on operational logging, the majority of tests can be performed during the SPS cold-checkout period, April  first/second week of May. CNGS Comm. Comm. / J. Wenninger

  9. BC tests / 1 By definition such tests must be performed during the CNGS beam commissioning period. Before extraction of the first beam : • SPS beam interlocks : • Interlock on bumped beam position @ extraction point. • Intensity interlock in SPS ring.  ~ 1 hour. • Interlocks that may be prepared in ‘advance’ : • BLM system – set rough interlock levels according to SPS experience.  ~ 1-2 hours (?). • Interlocks on BPMs will be counter-productive at this stage. CNGS Comm. Comm. / J. Wenninger

  10. BC tests / 2 Low intensity beam ‘on target’ (1-2 ×1012 p – tbd) : • BLM interlocks : • First ‘fine tuning’ of levels. • Complete test of all channels.  2-4 hours (to be confirmed). • BPM interlocks : • Full system test (each BPM).  2-4 hours (to be confirmed). • MKE kicker failures, interlocking and dump logic. • Optional (at this stage) : • Test of the FMCM (Fast Magnet Current Monitor) with beam. All tests (and thresholds) must be re-visited (subset of full test list) as the beam intensity is increased. CNGS Comm. Comm. / J. Wenninger

  11. Double-batch tests Special tests with double batch extraction : • Interlocking of second batch. • Interlock latching : • First batch  second batch. • One cycle  next cycle(s).  1-2 hours CNGS Comm. Comm. / J. Wenninger

  12. Maskable interlocks A certain number of interlock signals are maskable for safe beams (i.e. below damage threshold ~ 4-5 ×1012 p). • Automatic de-activation of masked interlock for unsafe beams must be tested. • Unknown for 2006 : will the distribution of the ‘safe beam flag’ be ready ? • If NOT : • Maskable channels may be forced to be maskable or un-maskable (all the time). Intervention by an BIS expert required for any modification. • Low intensity : masking permitted (all the time). • High(er) intensity : all interlock will be un-maskable (all the time).  Not a serious problem for commissioning (even if the flexibility is reduced).  If we have to run operational CNGS beams over the summer, we must ensure no interlock is maskable  operational ‘inefficiency’. CNGS Comm. Comm. / J. Wenninger

  13. Software interlocks The present SPS Software Interlock System (SSIS) is nearing the end of its life. A first version of the replacement system will become available in 2006 – hopefully during the CNGS commissioning period. • SSIS will not cover CNGS  rely on new system. • The priorities of the new system : CNGS and LHC TLs. • Contrary the TT20 North TLs where interlocking largely relies on SSIS, CNGS has a complete coverage by HW interlocks (exception : beam size @ T41). SW interlocking will provide : • more efficient injector cycling. • reduced SPS dump activation. • Commissioning of the SW interlock system will be required as soon as it becomes available. CNGS Comm. Comm. / J. Wenninger

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