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Copper Stabilizer Continuity Measurement Project

Copper Stabilizer Continuity Measurement Project. Copper Stabilizer Continuity Measurement Status & Plans – May 2011. MPE-TM – 12 May 2011 M. Koratzinos, J. Steckert, H. Thiesen, A. Verweij. Contents. Description of CSCM tests (Arjan) Status and Plans (Hugues) mQPS (Jens).

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Copper Stabilizer Continuity Measurement Project

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  1. Copper Stabilizer Continuity Measurement Project Copper Stabilizer Continuity Measurement Status & Plans – May 2011 MPE-TM – 12 May 2011 M. Koratzinos, J. Steckert, H. Thiesen, A. Verweij

  2. Contents • Description of CSCM tests (Arjan) • Status and Plans (Hugues) • mQPS (Jens)

  3. CSCM Objectives • Objectives of CSCM tests • Concerned circuits: RB, RQD and RQF • Determine the max. safe energy of LHC (4 - 5 TeV) • Other limitations (LHC non conformities) • RQX.R1 • RB.A78 (B30R7) • Other limitations ? (to be defined) • Assumptions • Time constants of the EE systems • 4 TeV: RB = 51 s, RQ = 10 s • 4.5 TeV: RB = 68 s, RQ = 15 s • 5 TeV: RB = 68 s, RQ = 15 s • No defect on the diode path

  4. CSCM Tests • CSCM current cycle (see Arjan presentation) • Heat the defect to identify it (runaway) Temp : 20 K Current : 4 kA – 6 kA Time : 10 s – 50 s Max T : 200 K Interlock = protection = stop the tests at the beginning of the runaway before destroying the splice interlock RB busbar 20 K – 6 kA 52 uOhm 0.2 s 50 mV mQPS threshold

  5. CSCM Tests • CSCM protection system (see Jens presentation) • 3 elements have to be protected • Splice = mQPS • Diode path (or magnet) = Qsym • CL = Qcl Qcl (CL at nominal operating conditions) Qsym mBS 20 K

  6. CSCM Tests • Power Converters • Use the same power converters for the 3 circuits (RB) • Voltage budget (RB): • 20K • Vdiode_rb # 265 V and Vdiode_rq # 90 V (Vdiode # 1.7 V @ 20 K) • Vdc_cable # 10 V @ 6 kA • Vbusbar_rb # 15 V @ 6 kA and Vbusbar_rq # 30 V @ 6 kA 280 - 290 V @ 20 K

  7. CSCM Tests • Power converter resources (20K) • 2 RB bridges in series

  8. CSCM Tests • RB circuit powering configuration RB Fip RB Pic RB RB Ext RB Earth

  9. CSCM Tests • RQ circuit powering configuration RB RB Earth RQ Fip RQ Pic RQ RQ Ext

  10. CSCM Test campaign • Sequence (1 sector): • Preparation: 1 week – 1 shift • QPS: 4 persons – 5 days/1shift • Disable QPHS, oQPS, Qsym and EE system • Install mQPS boards • IST of the mQPS • Cryogenic: • Empty the sector • Warm up and stabilize the sector at 20 or 40 K • PC: 2 technicians – 5 day/1shift • Modify the RB converters (2 days) • IST of PC (2 days) • PIC: • PIC tests w/o current # 6 persons during 1 week (1 sectors)

  11. CSCM Test campaign • Sequence (1 sector with 1 PC): • Powering tests: 7 days/2 shifts (2 weeks for the 1st sector) • ElQA: 2 persons – 1 day (M) • RB commissioning: 4 persons – 1 day (A) (2-QPS, 1-PC, 1-Cryo) • RB tests: 4 persons – 1 day (A) • Connect the RB PC to RQD circuit: 3 persons – 1 day (M) (1-QPS, 2-PC) • RQD commissioning: 4 persons – 1 day (A) • RQD tests: 4 persons – 1 day (A) • Connect the RB PC to RQF circuit: 3 persons – 1 day (M) (1-QPS, 2-PC) • RQF commissioning: 4 persons – 1 day (A) • RQF tests: 4 persons – 1 day (A) • Data analysis: 2 persons – 5 days (M) # 7 persons during 7 days and 2 shifts (1 sector) M = morning A = afternoon N = night

  12. CSCM Test campaign • Sequence (1 sector): • Recovery (w/o cryo): 1 week – 1 shift • Reinstall old BS board and enable oQPS, Qsym and EE system • IST of QPS • Reconfigure the RB power converter • IST of RB power converter • ElQA • Full recommissioning of the main circuits # 6 persons during 1 week (1 sectors) w/o powering tests

  13. CSCM Test campaign • Schedule: # 10 weeks (2 sets of test boards) # 1st RB # 1st RQ Preparation = 3 persons – 5 days – 1 shift Tests = 7 persons – 7 days – 2 shifts Recovery = 3 persons – 5 days – 1 shift (w/o cryo and powering tests)

  14. CSCM Test campaign • Schedule: # 8 weeks (3 sets of test boards) # 1st RB # 1st RQ Preparation = 3 persons – 5 days – 1 shift Tests = 7 persons – 7 days – 2 shifts Recovery = 3 persons – 5 days – 1 shift (w/o cryo and powering tests)

  15. CSCM Status and Plan • Status: • Today the limits of the CSCM tests are defined • Circuits (magnet and DFB) at 20 K • Current leads at nominal operating conditions • Current cycle (4 or 6 kA) • Protection system (mBS, Qcl and Qsym) • Powering system (RB converter with both bridges in series) • Test campaign

  16. CSCM Status and Plan • Planning: • First draft meeting: 8 June 2011 • Second draft meeting: 22 June 2011 • Internal review: 29 June 2011 • Type test in RQ circuit: September 2011 • Tests campaign: December 2011 – February 2012

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