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Busbars & splices measurements on IPQs

ISRM Labview software (EN/ICE)

Richard Mompo on behalf of the ELQA teamTE/MPE-EI

On 02.09.2009: Presentation of the project to MP3

On 22.09.2009: Green light to perform our first tests on Q7 to Q10 in L2.

On 02.10.2009: First valid measurements on Q7 to Q10 in L2.

Preliminary results… We are in business!

Infrastructure problem: VDSL sockets…

Some conclusions.

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Problems encountered during our first measurements (huge noise) were present because the PXI was not configured properly to use it at its full potential.

Adriaan Rijllart and Dmitiy Kudryavstev found the best parameters for our tests.

– Use of maximum resolution (7.5 digits).

– Low frequency.

– Setting of a aperture time.

We didn’t change the hardware.

Problems reported on 22/09/2009

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The « spikes » correspond to the inductive voltage during ramping.

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First calculations still to be checked:

Analyses done by Mateusz Bednarek

Magnet Bus-bar of lead Resistance [?] Uncertainty (1σ) [?] Offset [V] Uncertainty of offset (1σ) [V]Q10 DFLCS.7L2.1 5.3E-09 1.E-09 -6.1E-05 2.E-06Q10 DFLCS.7L2.2 5.4E-09 3.E-09 1.3E-05 1.E-06Q10 DFLCS.7L2.3 5.3E-09 1.E-09 2.4E-05 2.E-06Q9 DFLCS.7L2.4 5.7E-09 1.E-09 9.4E-06 2.E-06Q9 DFLCS.7L2.5 5.9E-09 2.E-09 1.0E-05 1.E-06Q9 DFLCS.7L2.6 6.1E-09 1.E-09 1.8E-05 2.E-06Q8 DFLCS.7L2.7 5.3E-09 7.E-10 2.9E-05 1.E-06Q8 DFLCS.7L2.8 6.1E-09 2.E-09 1.7E-05 7.E-07Q8 DFLCS.7L2.9 5.4E-09 7.E-10 5.6E-06 1.E-06Q7 DFLCS.7L2.10 5.4E-09 1.E-10 -3.6E-05 2.E-07Q7 DFLCS.7L2.11 5.7E-09 3.E-10 -7.7E-05 1.E-07Q7 DFLCS.7L2.12 5.3E-09 1.E-10 -2.4E-05 3.E-07

Those calculations match perfectly with Excel fits!

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– It looks like we are able to measure those splices with a sufficient accuracy.

– We still need to check the precision of our measurements.

– Re-measuring twice the same magnets could be interesting to check reproducibility.

– The automatic analyses is not yet ready.

– We will need to remove our system in L2.

• Need of QPS for the “consignation/déconsignation”.

• Is it needed to re-qualify something afterwards (for QPS)?

– We could install 2 systems in the 3 remaining sectors that are not yet released by ELQA (S3-4, S6-7, S8-1) and leave them on stand-by for the powering tests.

• Advantage: PC and QPS are still “consigné”.

Conclusions:

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ELQAProblem with infrastructure (Ex: in L2)

VDSL socket placed at 3m high…Very convenient!

Collimator underneath used as a foot step !!!

VDSL sockets are located arbitrarily every 100m in the tunnel independently of the equipment on place!!!

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Thank you for your attention