nQPS commissioning …a long way to go

Topics nQPS component overview Enhancements in Firmware Commissioning diagram Detailed task list Summary

nQPS system - components DQLPU DQAMGSDQAMGS D Q Q D S 2x D Q Q B S 3x D Q Q D S 2x D Q Q B S 2x Crate controller Symmetric quench detection board Bad splice detection board Cable connections Signals BS/DSHeatersInterlocksPowerFIP In numbers: 450x DQLPU 450x DQAMGs 1700x DQQDS 2100x DQQBS Crate

nQPS enhancements New Firmware for DQAMGS and DQQDS boards DQAMGS: Better diagnostics/stability (automated sector set-up possible) DQQDS: new logic prevents chain reactions and protects against single negative pulses DQQDS: Enhanced buffer functionality DQQDS: Adaptive filter onset programmable DQQBS: New threshold (500uV)

ELQA finished, signal cables connected Bring up “old” QPS system (FIP/Power/Interlocks) nQPS basic tests (test cabling by heater firing set BS coefficients & threshold) Connect nQPS to interlocks nQPS advanced tests up to 2kA (pyramids, fast power BS coefficients fine tuning) Connect nQPS to heaters Heater firing from nQPS, Po phase 0 Po phase 2 Test of interlocks Final nQPS tests: Pyramids up to 5kA, energy extractions up to 6kA) Po phase 2 (phase 0 possible) Po phase 2

nQPS HWC Powering Phase 0 1.DQLPU, TUNNEL: Re-connection of the signal/power cable 2.DQQDS, TUNNEL: Firmware upgrade for DQQDS boards. All 4 cards will be exchanged by updated ones. Update of equipment database 3.DQAMGS, TUNNEL: Firmware upgrade for DQAMGS crate controllers (exchange of boards) 4.TUNNEL: Re-powering of the 110 Power-Packs of the sector 5.TUNNEL: Re-establish FIP communication with all nQPS controllers of the three main circuits in the arc to be commissioned. 6.DQHDS, CCC: Test of the ‘old QPS’ interlocks. Close interlock loop. Time: 2h/sector 7.DQHDS, TUNNEL: Re-powering of the DQHDS in the arcs and in the LSS’. Verification of correct charging. 8.DQQBS /DQQDS, CCC: Check of all picked-up voltage signals (noise floor) on BS and DS boards. Ramp to 110A to see if all cards are alive. Time: 2-8h/sector 9.DQQBS, CCC: Using the new write/read tool: Load a default set of Inductive Compensation Coefficients. Read back the values and compare. Time: 3h/sector

nQPS HWC Powering Phase 2 (1/3) 1.DQQBS, CCC: Ramp to inj. current and dump. Calculate and correct the compensation values. Ramp again for verification. To be repeated until satisfaction. Time: 8h min./sector 2.DQQBS /DQQDS, CCC: Fire heaters in groups from “old” QPS. Signatures recorded by BS and DS boards to be used to verify cabling/configuration/HDS controller position. Verification of proper heater discharge curves. (PM) Eventually pre-cycling to 110A or 350A required. (PO Phase 0 possible) Time: 2h/sector hours off-line 3.DQQBS /DQQDS, CCC: nQPS interlock checking. Verification of correct operation of the interlock chain. Ending with ramp to 2 kA to confirm operation without trigger activation (with interlock still disabled) Time: 2 – 4h/sector 4.DQQDS, CCC: Type test in the first commissioned sector: Opening of the EE facilities at ~ 1000A during an upwards ramp. Time: 2h 5.DQQBS /DQQDS, TUNNEL: Interconnection of the nQPS to the Interlock Chain. Time: 4 h/sector

nQPS HWC Powering Phase 2 (2/3) 6.DQQBS/DQQDS, CCC: Test of nQPS interlocks Time: 2h/sector (PO Phase 0 possible) 7.DQQBS/DQQDS, CCC: Repetition of ramping test to 2 kA. Energy Extraction from 2 kA. Time: 4h/sector 8.DQQBS, CCC: Perform a Measurement Pyramid (Splice Monitor) to 2 kA, mainly to verify the repaired cabling (PI2.s1). Time: 3 – 4h/sector 9.DQQDS, TUNNEL: Interlinking the heater firing circuits of the nQPS (connecting the nQPS with the heaters) Time: 2h/sector. 10.DQQDS, CCC: Heater firing test from nQPS – in groups. Off-line analysis Time: 2h/sector + 2-4h analysis (PO Phase 0 possible)

nQPS HWC Powering Phase 2 (3/3) 11.DQQDS, CCC: Ramp to 4 kA. Energy Extraction at 4 kA. Analyze the results. Time: 2h/sector, analyzing 4h/sector 12.DQQBS, CCC: Perform a Pyramid to 5 kA. Analyze the results. Time: 4h/sector 13.DQQBS, CCC: Ramp in two steps to 6 kA. Analyze the results. Calorimetric measurement by CRG Time: 8h/sector, incl. preparation time 14.DQQDS, CCC: Ramp to 6 kA. Energy Extraction at 6 kA. Analyze the results. Time: 4 hours 15.DONE, nQPS fully commissioned for 3.5TeV operation…

Summary Re-commissioning of the nQPS system after connector repair (almost all tests of nov/dec have to be repeated (S12) or done the first time) Firmware updates for enhanced functionality/stability New threshold value for the DQQBS (500uV allows smoother operation due to more margin) Commissioning time in CCC estimated to ~65h per sector (tunnel interventions not included)