n QPS IST its the cable stupid 07102020

n. QPS IST …it’s the cable stupid 07/10/2020 Jens Steckert 1

Topics • • • Introduction to DQLPU-S crate Configurations of the n. QPS system Motivation of IST Resources Thanks to Bozhidar, Zinur & QPS team for knowledge sharing and ideas ! 07/10/2020 Jens Steckert 2

Acronyms Acronym Decoded DQLPU-S n. QPS crate DQAMGS n. QPS crate controller DQQDS Symmetric quench detector (Sym. Q) DQQBS Splice supervision board DQQDE Voltage to ground feeler DQHDS Quench heater power supply DQLPU-A i. QPS crate DQAMC i. QPS crate controller DQQDL i. QPS quench detector (dipole & quadrupole) DQHSU i. QPS quench heater supervision board DYPB/Q Yellow rack for dipoles/quadrupoles 07/10/2020 Jens Steckert 3

DQLPU-S MBA-Bxx. L/Rx DQLPU-S DQHDS DQLPU-A DYPB 07/10/2020 n. QPS IST, Jens Steckert for TE-MPE-TM 4

The n. QPS crate (DQPLUS) • Per crate – – – 6 Signal cables 4 Heater trigger cables 2 interlock cables 2 power cables 1 power cycle cable 07/10/2020 436 crate installed ~6500 cables to be connected Jens Steckert 5

Signal swaps RB RB-0 RB-1 RB-4 RB-2 07/10/2020 Jens Steckert 6

Signal swaps RQ RQ-0 RQ-1 Dependent on location, has to be set in 50% of all crates 07/10/2020 Jens Steckert 7

DQAMGS swap Dependent on location, has to be set in ~50% of all crates 07/10/2020 Jens Steckert 8

small exercise • 4 dipole cables which can be freely permutated 4! combinations • 3 + 1 heater trigger cables which can be freely permutated 4! combinations • Cabling alone: 24 x 24 -1 = 575 wrong connection schemes per crate • 1 out of 4 DQQDS configurations can be set • 1 DQAMGS data swap • Configuration 4 x 2 -1 = 7 possible wrong configurations per crate Combined 4607 possibilities to get things wrong per crate ! This does not account for any faulty items 07/10/2020 Jens Steckert 9

Aim of IST • Verify the cable connections of the n. QPS system – Signal cables – Interlock cables – Heater trigger cables • Verify the configuration of the n. QPS system (DS channel maps and swaps/ DAMGS swaps) • Verify proper functionality of inputs and outputs (signals/heater triggers/interlocks) 07/10/2020 Jens Steckert 10

Starting point • Crate equipped with cards (DQQDS/DQQBS/DQQDE) • Crate had passed the functional tester • Crate equipped with location specific DQAMGS & traveller sheet • Transported to destination in tunnel 07/10/2020 Jens Steckert 11

Step 0: Installation Requirements • Access • (Power) Actions • Install crate in destination (B-Rack) – – – 07/10/2020 Install crate connect signal cables connect heater trigger cables connect interlock cables connect power Jens Steckert 12

Step 1: Field bus connection Requirements • Access • Power available in sector • Field bus (World. FIP) and supervision layer fully functional Actions • Connect DQAMGS to World FIP • Verify that connected crate shows up at the correct position in supervision (qps expert) • Basic connection / power test – Makes sure that all cards have power and communicate – Check the functionality of the remote power cycle option 07/10/2020 Jens Steckert 13

Step 2 A: Cable verification preparation Conditions • Power, Access, Controls, Supervision • No other people in tunnel • Dummy loads and test sources available Actions • Locate desired n. QPS crate B • Identify connected magnets (4 dipoles, 2 quadrupoles) • Install dummy loads on i. QPS systems connected to DUT (3 x dipole, 1 x quadrupole) • Set DQQBS compensation coefficients to 0 07/10/2020 Jens Steckert 14

Cable verification principle i. QPS B 12 R connected to dummy i. QPS A 13 R i. QPS C 13 R connected to dummy MBA-A 13 R MBA-C 13 R MBA-B 12 R From n. QPS B 15 R i. QPS B 14 R switched off MBA-B 14 R D 1 D 2 D 3 TD 2 TD 1 D 4 n. QPS B 13 R Physical Controls 07/10/2020 n. QPS B 15 R n. QPS B 13 R Magnet DQQDS signals DQQBS signals B 12 R U_DIODE B 12 R Umag BS 2 B 14 R U_DIODE B 14 R Umag BS 2 A 13 R U_DIODE A 13 R Umag BS 3 A 15 R U_DIODE A 15 R Umag BS 3 C 13 R U_DIODE C 13 R Umag BS 4 C 15 R U_DIODE C 15 R Umag BS 4 B 14 R U_REF_N 1 B 16 R U_REF_N 1 Jens Steckert 15

Step 2 B: Cable verification MB Requirements • • Power, Access, Controls, Supervision No other people in tunnel Test source available and dummy loads installed i. QPS fully functional and DQHDS charged Actions • • Install source on first of 4 dipoles Inject signal < DS threshold Verify that signal comes up in correct channel (DQQDS U_DIODE/U_REF_N+1, DQQBS U_MAG) Inject signal > DS threshold Verify that DQQDS triggers Verify that correct DQHDS has discharged into dummy (Discharge of HDS causes a secondary trigger on the DQHSU which leads to PM creation) Re-connect n. QPS signal cable with IFS box Repeat for the other 3 dipoles connected to the n. QPS crate 07/10/2020 Jens Steckert 16

Step 2 C: Cable verification MQ Requirements • • Power, Access, Controls, Supervision No other people in tunnel Test source available and dummy loads installed i. QPS fully functional and DQHDS charged Actions • • Install source on first of 2 Quadrupoles Inject signal < DS threshold Verify that signal comes up in correct channel (DQQDS U_DIODE/U_REF_N+1, DQQBS U_MAG) Inject signal > DS threshold Verify that DQQDS triggers Verify that correct DQHDS has discharged into dummy (Discharge of HDS causes a secondary trigger on the HSU which leads to PM creation) Re-connect n. QPS signal cable with IFS box Repeat for the other quadrupole connected to the n. QPS crate 07/10/2020 Jens Steckert 17

Step 2 D: Cable verification: clean-up Requirements • • Power, Access, Controls, Supervision No other people in tunnel Test source available and dummy loads installed i. QPS fully functional and DQHDS charged Actions • Switch off DQHDS, wait 10 min • Disconnect n. QPS cable from signal source & re-connect to IFS box • Remove dummy loads from i. QPS systems (3 x dipoles, 1 x quadrupole) • Disconnect i. QPS cable from dummy, Re-connect i. QPS to magnet 07/10/2020 Jens Steckert 18

Step 3: Interlock test Requirements • Power, Controls, Supervision • Interlock loop CLOSED • NO access required (in case of proper functionality) Actions • Run test modes which open interlock for all boards of the crate, check that interlock loop is ruptured (close loop after each test) • Repeat for all crates Has to be automated (was done in the past) 07/10/2020 Jens Steckert 19

Step 4: LV heater firing from n. QPS (Part of HWC) Requirements • • Power, Controls, Supervision, Logging, PM Access No other people in tunnel i. QPS fully functional and DQHDS off Actions Execute all DS test modes (all heaters triggered) Switch on DQHDS (due to latched trigger, won’t charge) Reset DQQDS (DQHDS will start charging) Issue test modes from DS one after the other between 50 -100 V (Java software for automated heater firing probably needs to be modified) • Repeat for next n. QPS crate • • 07/10/2020 Jens Steckert 20

Items tested during IST Item to test # of items IST step Comment DQAMGS address 1 1 ensures that crate is installed at the correct location with the correct field bus address POWER packs 2 1 Check if ALL DQQBS boards are present in supervision. If one of the power packs fails some of the DQQBS are not present. n. QPS Dipole signal cable 4 x 2 A+B 2 B Signal injected on IFS box level. Xcheck with supervision reveals cable swaps, polarity inversions etc. n. QPS Dipole heater trigger cable 3 2 B Signal > thres should trigger correct heater ! checks as well correct field bus address of i. QPS n. QPS Quadrupole signal cable 2 x 2 A+B 2 C Signal injected on IFS box level. Xcheck with supervision reveals cable swaps, polarity inversions etc. n. QPS heater trigger cable 1 2 C Signal > thres should trigger correct heater ! checks as well correct field bus address of i. QPS DQQDS configuration (signal maps/swaps) 4 2 B, 2 C If DQQDS is misconfigured, steps 3 B & 3 C would fail DQAMGS configuration 1 2 B, 2 C Checks if signals are shipped up to the gateway as controls system expects it. PIC interlock 4 x DS 5 x 2 BS 3 Interlock test, all cards acting on interlock loop should be able to rupture it Heater trigger circuits DS RB 3 x 2 (A+B) 4 A Check that heater trigger circuits on DS are working by execution of test modes (A & B separately) Heater trigger circuits DS RQ 2 x 1 4 B Check that heater trigger circuits on DS are working by execution of test modes (A & B separately) 07/10/2020 Jens Steckert 21

Items required for IST • Active signal source to inject signals at the D 20 level (1 per team) • Support software: Crate# vs magnet# vs signals in controls could show values from controls system • Dummy loads for DQHDS (3 + 1 per team) 07/10/2020 Jens Steckert 22

Resources/Timing (rough estimate) • 2 experts per team • 2 teams per sector • 60 min per crate (with full tool support) 2 teams for 4. 6 days (6 h/day) per sector • 1 specialist for support in CCC/office 07/10/2020 Jens Steckert 23

Conclusion n. QPS crates & cabling are complex Comprehensive IST is tedious Needs to be included in planning n. QPS functionality cannot be guaranteed without proper IST • Synergies between n. QPS IST & i. QPS IST (dummy loads, heater firing) • • 07/10/2020 Jens Steckert 24