powering group of circuit doubts and proposals of the procedure reviewing team (gianluigi, rob,...

Powering Group of Circuit

Doubts and proposals of the procedure reviewing team

(Gianluigi, Rob, Sandrine, Matteo, Boris)

Ref document: LHC-MPP-HCP-071

• PGC.1 Study the electromagnetic coupling between circuits, devoting special attention to the QPS detectors. This group of tests is done at powering subsector level.

• PGC.2 Validation the performance of the DFB and current leads when all the circuits of one DFB are powered as well as the long term behaviour, at sector level, by using an overall current profile representative of a machine operation configuration. It is also a last check of the superconducting splices. – The PGC1 and PGC2 tests should be performed with all the circuits ramping at the

acceleration and ramp rates achieved during the commissioning. These will possibly match the nominal acceleration and ramp rates.

• PGC.3 Validation the squeeze functions of the machine.• PGC.4 Final machine validation by powering all sectors in

unison

Powering Group of Circuit

PGC1 for the ARC of the 2008Io

ut

(A)

RB

5 TeV RampFast Power Abort of the Main

Dipole at Nominal CurrentPGC.0 Test of the

Global Protection Mechanism

RQD

RQF

IPQ

600 A

60-80 & 120 A

10

min

ute

Fast Power Abort of RB

Slow Power Abort of Main Quadrupole Loss of the 'CRYO_MAINTAIN'

10

min

ute

s

Loss of the CRYO_MAINTAIN

Slow PowerAbort of RQD

Iou

t (A

)

Fast Power Abortsof 600 A circuits

I_PGC_EMC


30

seco

nds

I_PGC_EMC

I_PNO_EMC

30

seco

nds

30

seco

nds

30

seco

nds

I_INJECTION

I_MIN_OP

Fast Power Abort of RQD-RQFB

Fast Power Abort of one IPQ

10

min

ute

s

30

seco

nds

30

seco

nds

I_PGC_CYCLE

Fast Power Abort of the Main Dipole at Intermediate Current

10

min

ute

s

30

seco

nds

30

seco

nds

I_PGC_CYCLEFast Power Abort of RB

Fast Power Abort of 600 A Circuits at Plateau

I_PGC_EMC


I_PGC_EMC

Fast Power Abort of 600 A Circuits when Ramping the Main Circuits

5000 A

10 minutes

30 minutes

30 minutes

10 minutes

10

min

ute

s

1: GPM tests@ injOnRB,RQD/F,IPQ

2: Ramp @ Nom

3: FPA @ Int.

4: FPA @ Nom

5: EMC during flat top

6: EMC during ramp

7: SPA on RQs

8: Loss of Cryo Maintain

• The functionalities are checked in the PIC2 tests.

• The link Cryo-Maintain/PIC is checked in PIC2 for each circuit

• Proposal: skip because redundant.

PGC1: Arc- PIC functionalitiesIo

ut

(A)

RB




RQD

RQF

IPQ

600 A

60-80 & 120 A

10

min

ute



10

min

ute

s



Iou

t (A

)


I_PGC_EMC


30

seco

nds

I_PGC_EMC

I_PNO_EMC

30

seco

nds

30

seco

nds

30

seco

nds

I_INJECTION

I_MIN_OP



10

min

ute

s

30

seco

nds

30

seco

nds

I_PGC_CYCLE


10

min

ute

s

30

seco

nds

30

seco

nds



I_PGC_EMC


I_PGC_EMC


5000 A

10 minutes

30 minutes

30 minutes

10 minutes

10

min

ute

s1: GPM tests@ injOnRB,RQD/F,IPQ

Iou

t (A

)

RB




RQD

RQF

IPQ

600 A

60-80 & 120 A

10

min

ute



10

min

ute

s



Iou

t (A

)


I_PGC_EMC


30

seco

nds

I_PGC_EMC

I_PNO_EMC

30

seco

nds

30

seco

nds

30

seco

nds

I_INJECTION

I_MIN_OP



10

min

ute

s

30

seco

nds

30

seco

nds

I_PGC_CYCLE


10

min

ute

s

30

seco

nds

30

seco

nds



I_PGC_EMC


I_PGC_EMC


5000 A

10 minutes

30 minutes

30 minutes

10 minutes

10

min

ute

s


Iout

(A

)

RB




RQD

RQF

IPQ

600 A

60-80 & 120 A

10

min

ute



10

min

ute

s



Iout

(A

)


I_PGC_EMC


30

sec

onds

I_PGC_EMC

I_PNO_EMC

30

sec

onds

30

sec

onds

30

sec

onds

I_INJECTION

I_MIN_OP



10

min

ute

s

30

sec

onds

30

sec

onds

I_PGC_CYCLE


10

min

ute

s

30

sec

onds

30

sec

onds



I_PGC_EMC


I_PGC_EMC


5000 A

10 minutes

30 minutes

30 minutes

10 minutes

10

min

ute

s

PGC1: Arc – Cycle at nominal

• This test is performed in order to verify any electromagnetic coupling among circuits.

• The list of QPS that triggered should be determined and the QPS signals should be verified in order to understand whether a quench occurred.

• Is it necessary to do it taken into account that the following tests should allow to verify that as well.

Iout

(A

)

RB




RQD

RQF

IPQ

600 A

60-80 & 120 A

10

min

ute



10

min

ute

s



Iout

(A

)


I_PGC_EMC


30

sec

onds

I_PGC_EMC

I_PNO_EMC

30

sec

onds

30

sec

onds

30

sec

onds

I_INJECTION

I_MIN_OP



10

min

ute

s

30

sec

onds

30

sec

onds

I_PGC_CYCLE


10

min

ute

s

30

sec

onds

30

sec

onds



I_PGC_EMC


I_PGC_EMC


5000 A

10 minutes

30 minutes

30 minutes

10 minutes

10

min

ute

s

PGC1: Arc - FPA @ Interm. and Nom

3: FPA @ Int.

4: FPA @ Nom

4: Provoked quench on a RB

Iou

t (A

)

RB




RQD

RQF

IPQ

600 A

60-80 & 120 A

10

min

ute



10

min

ute

s



Iou

t (A

)


I_PGC_EMC


30

secon

ds

I_PGC_EMC

I_PNO_EMC

30

secon

ds

30

secon

ds

30

secon

ds

I_INJECTION

I_MIN_OP



10

min

ute

s

30

secon

ds

30

secon

ds

I_PGC_CYCLE


10

min

ute

s

30

secon

ds

30

secon

ds



I_PGC_EMC


I_PGC_EMC


5000 A

10 minutes

30 minutes

30 minutes

10 minutes

10

min

ute

s

Iou

t (A

)

RB




RQD

RQF

IPQ

600 A

60-80 & 120 A

10

min

ute



10

min

utes



Iou

t (A

)


I_PGC_EMC


30

seconds

I_PGC_EMC

I_PNO_EMC

30

seconds

30

seconds

30

seconds

I_INJECTION

I_MIN_OP



10

min

utes

30

seconds

30

seconds

I_PGC_CYCLE


10

min

utes

30

seconds

30

seconds



I_PGC_EMC


I_PGC_EMC


5000 A

10 minutes

30 minutes

30 minutes

10 minutes

10

min

utes

PGC1: ARC – EMC for 600A• EMC among 600A or 600A vs. mains?• Do we really need to do 2 different tests? Shall

we keep only the most conservative? (2nd)• Once (If) an EMC is found, which are the

actions to be taken?• Triggering sequence (Rob):

– determined by the current decay rate at fast power abort

– 600A circuits divided into two groups as N-line correctors or spool pieces.

5: EMC during flat top

6: EMC during rampTrigger Seq

Group Circuit Quench expected

Initial decay rate (A/s)

1 Spool pieces RCS No 34002 RCO maybe 3503 RCD maybe 13.5 kA/s1 N line RQTL11 No 2002 RQS (2-magnets) No 4503 RQTL9 (in 3 and

7)No (?) 600

4 RQT12,13 No 7705 RSF1/2, RSD1/2 Yes 720-8206 RQTD/F Yes 12007 RSS Yes 12758 RQS Yes 19009 RO D/F No 21 - 34 kA/s

• What is the aim of this test? PC functionalities test?

• why do we do this test for RQs and not for the RB?

• Done by removing the permit to powering

Iout

(A)

RB




RQD

RQF

IPQ

600 A

60-80 & 120 A

10

min

ute



10

min

ute

s



Iout

(A)


I_PGC_EMC


30

seco

nds

I_PGC_EMC

I_PNO_EMC

30

seco

nds

30

seco

nds

30

seco

nds

I_INJECTION

I_MIN_OP



10

min

ute

s

30

seco

nds

30

seco

nds

I_PGC_CYCLE


10

min

ute

s

30

seco

nds

30

seco

nds



I_PGC_EMC


I_PGC_EMC


5000 A

10 minutes

30 minutes

30 minutes

10 minutes

10

min

ute

s

PGC1: ARC - SPA on RQ

7: SPA on RQs

PGC1: Matching Sec

RD2

RQ4

120 A

RQ5

RQ6

Iou

t (A

)

5 TeV RampSlow Power Abort of a Main Circuit at Nominal Current

10

min

ute

s

TIM

E_

ZE

RO

TIM

E_

ZE

RO

I_PGC_CYCLE

Fast Power Abort of a Main Circuit at Nominal Current

TIM

E_

ZE

RO

TIM

E_

ZE

RO

Fast Power Abort of D2

10

min

ute

s

I_PGC_CYCLE

TIM

E_

ZE

RO

TIM

E_

ZE

RO

30 minutes

10 minutes

TIM

E_

ZE

RO

Slow Power Abort of RQ4I_PGC_CYCLE

TIM

E_

ZE

RO

TIM

E_

ZE

RO


10

min

ute

s

I_PGC_CYCLE

Loss of the 'CRYO_MAINTAIN'

2: FPA in a Separation dipole

3: SPA in a IPQ1: Cycle @ Nominal


• do we need it? – DFB circuit coupling checked in the

following step (FPA)– DFB Heat Load test? Also in the next…or

even in PGC3 (squeezing tests)

PGC1: MS – Cycle at nominal

RD2

RQ4

120 A

RQ5

RQ6

Iou

t (A

)


10

min

ute

s

TIM

E_

ZE

RO

TIM

E_

ZE

RO

I_PGC_CYCLE


TIM

E_

ZE

RO

TIM

E_

ZE

RO


10

min

ute

s

I_PGC_CYCLE

TIM

E_

ZE

RO

TIM

E_

ZE

RO

30 minutes

10 minutes

TIM

E_

ZE

RO


TIM

E_

ZE

RO

TIM

E_

ZE

RO


10

min

ute

s

I_PGC_CYCLE


1: Cycle @ Nominal

• The fast power abort of the superconducting dipole will produce a fast power abort of all the circuits in the corresponding powering sub-sector. – Test performed to verify the correct

operation of the GPM? These tests are likely no more necessary because there is already a test at 0/I_min_op current during the PIC Global protection mechanism test during the HW commissioning of each circuit

– Verification of the electromagnetic coupling among the circuits sharing the same DFB?. The list of QPS that triggered should be determined and the QPS signals should be verified in order to understand whether a quench occurred. How many circuits can be coupled?

PGC1: MS – FPA on IPD

RD2

RQ4

120 A

RQ5

RQ6

Iou

t (A

)


10

min

ute

s

TIM

E_

ZE

RO

TIM

E_

ZE

RO

I_PGC_CYCLE


TIM

E_

ZE

RO

TIM

E_

ZE

RO


10

min

ute

s

I_PGC_CYCLE

TIM

E_

ZE

RO

TIM

E_

ZE

RO

30 minutes

10 minutes

TIM

E_

ZE

RO


TIM

E_

ZE

RO

TIM

E_

ZE

RO


10

min

ute

s

I_PGC_CYCLE


2: FPA in a Separation dipole

• To be performed in the matching sections containing cryostats that have several main circuits fed by a DFB. These are those fed from a DFBL (it is considered that they belong to the same cryostat) or by a DFBM that contain more than one main circuit (e.g. D2Q4 or D4Q5 cryostats). However all the circuits of the matching section are included in the test.

• The circuit going through the slow abort has to be specified for each matching section. In case it is a MQM/MQY circuit, the power permit must be removed only in one of the converters leaving the other ON. Why that?

• Do we need such test?• List of parameters to be recorded: The list of

QPS trips

PGC1: MS – SPA on a IPQ

RD2

RQ4

120 A

RQ5

RQ6

Iou

t (A

)


10

min

ute

s

TIM

E_

ZE

RO

TIM

E_

ZE

RO

I_PGC_CYCLE


TIM

E_

ZE

RO

TIM

E_

ZE

RO


10

min

ute

s

I_PGC_CYCLE

TIM

E_

ZE

RO

TIM

E_

ZE

RO

30 minutes

10 minutes

TIM

E_

ZE

RO


TIM

E_

ZE

RO

TIM

E_

ZE

RO


10

min

ute

s

I_PGC_CYCLE


3: SPA in a IPQ

• As for the arc…

PGC1: MS – Loss of cryo maintain

RD2

RQ4

120 A

RQ5

RQ6

Iou

t (A

)


10

min

ute

s

TIM

E_

ZE

RO

TIM

E_

ZE

RO

I_PGC_CYCLE


TIM

E_

ZE

RO

TIM

E_

ZE

RO


10

min

ute

s

I_PGC_CYCLE

TIM

E_

ZE

RO

TIM

E_

ZE

RO

30 minutes

10 minutes

TIM

E_

ZE

RO


TIM

E_

ZE

RO

TIM

E_

ZE

RO


10

min

ute

s

I_PGC_CYCLE



• The second step is no more needed • The ramp down after the last step

should be performed in steps with 2-3 plateaus.

PGC2: all the circuits

RB

RQD

RQF

IPQ & IPDs

600 A

60-80 & 120 A

Iou

t (A

)

+I_PNO_CYCLE1

0 m

inu

tes

8 hours

TIM

E_

ZE

RO

TIM

E_

ZE

RO

TIM

E_

ZE

RO

30

min

ute

s

TIM

E_

ZE

RO

TIM

E_

ZE

RO

Current Leads Performance + Heat Run

Obsolete

PGC3 and PGC4

• ABP working on it (S. Fartoukh and M. Giovannozzi) – first draft in within following weeks.

• Once upon a time there was a MTF step/field called MPP OK for each circuit which, once filled as “ok”, determined the start of the powering test of that circuit.

• Those MTF field are still there, but largest part empty. Accessing MTF is heavy if done per circuit!

• This year: MP3_OK sequence requiring an MP3 expert signature and an automatic fill of MTF field.

AOB: MP3 OK for powering

powering group of circuit doubts and proposals of the procedure reviewing team (gianluigi, rob,...

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