Sectors in operation – status

1. Sectors in operation – status G.Arduini for the Machine Check-Out Team (R. Alemany, R. Giachino, M. Lamont, LHC-EICs/OP, HWC team, all Eqpt. Groups) Special thanks to D. Nisbet – AB/PO ICC

2. Status • Available Sectors: • Sector 56 (18/06 with interruptions for installation, in particular triplet current lead temperature control) – no triplet correctors yet • Sector 67 (06/08-13/08) • Sector 23 (13/08) – no triplet yet • Warm magnets in: LSS 2/3/5/6/8 ICC

3. What are we doing? M. Strzelczyk, M. Lamont ICC

4. What are we doing? ICC

5. What are we doing? • Tested (for 56/67 – ongoing for 23) • Basic sequencer functionalities for pre-cycle, injection, ramp, squeeze and ramp-down • SW Interlock System verification • Alarms verification • Power converter synchronization • Verification of the specifications for ramp and acceleration rates vs. squeeze time, snap back,, etc.  feedback to HWC and revision of the parameters for the tests in the following sectors • Controls tests: • Trim incorporation • Orbit corrections • Separation and crossing bumps • Ramp abort ICC

6. Tracking tests in Sector 56 and 67 • Test Method for a single sector: • Regulation with I Channel A only (normally A and B) • I Channel B cabled to ‘neighboring circuit’ • Test method for multiple sectors: • As above, but use ‘Post Mortem Timing Event’ to trigger across several sectors D. Nisbet ICC

7. 5TeV Ramp of RB, RQF, RQD (Sectors 56 and 67) 8419.68 A RB.A67 (Iref, Imeas) 3.16 A 8416.52 A RB.A56 (Iref, Imeas) RB (A56, A67) RQF (A56, A67) RQD (A56, A67) Ramp to 5TeV D. Nisbet ICC

8. 5TeV Ramp of RB, QF, QD PRELIMINARY 756.911 A 756.906 A Iref of RB (A56, A67) RQF (A56, A67) RQD (A56, A67) 2.3 ppm of 13kA Synchronised start of ramp using timing event D. Nisbet ICC

9. Iref(RB) sent to RQF, RQD Difference in current between circuits Sector 56 Sector 67 +2ppm Ia(RQF) – Ib(RB) Ia(RQD) – Ib(RQF) Ia(RB) – Ib(RQD) • Offset due to calibration • Drift due to thermal and gain effects -2 ppm Spread of 4ppm between circuits in Sector56 and 67 (tracking and precision combined) D. Nisbet ICC

10. Global PM - Iref(RB) sent to RQF, RQD Global PM Event Iref(RB_5TeV) = Iref(RQF_5TeV) = Iref(RQD_5TeV) Global PM Event D. Nisbet ICC

11. 20 ppm required of Nominal Observations are very encouraging Possibility of a “hardwired” comparison being investigated Global PM - Iref(RB) sent to RQF, RQD D. Nisbet ICC

12. Summary – Tracking Sectors 56 and 67 For a single sector measurement arrangement guarantees test For multiple sectors Global PM Event to simultaneously trigger data principle tested in Sector56 assumes calibration of timing at each point (done) Total uncertainty due to function generation, tracking, calibration and drift errors ~4ppm of 13kA (~50mA) Synchronised start and end of tracking between two sectors has been demonstrated ICC

13. Not only power converters COLLIMATORS S. Redaelli ICC

14. Not only power converters • Beam Interlocks from vacuum valves in the available vacuum sectors (in strict collaboration with AT/VAC): • LSS 2-3-6-7-8, end of TI2/8 • Vacuum logging • Alarms • Beam dump energy tracking: • Energy meter for the LHC • Connected to main bends in Sector 56/67 • Tracking of the Septa and Q4 magnet tested • Run during the Synchronization Test 1 with Sector 56 • Will need to disconnect and go back to simulation for the next Synch Test ICC

15. Other systems • Last but not least all the injection and beam instrumentation, control systems that have led to… ICC

16. Next steps • Build up the machine with new sectors as they become available • Machine protection verification and build-up of the whole interlock system • RF (power, low level and beam) signals and control(s) from CCC ICC

17. Issues • Need to increase the awareness that we are coming out from an installation phase: • Continuous request of accesses, interventions • “Lack of discipline” in the accesses  doors are forced without reason ICC