CLIC MODULE Preparation for the duty cycles

112-February-2014 BE-RF-PM

CLIC MODULEPreparation for the duty cycles

Written by: Elena DaskalakiChecked by: Alexander SamochkineApproved by: Germana Riddone

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Preparation steps

• Power measurements

• Air speed measurements

• FEA simulator

• Alignment measurements in transients

Preparation phase Duty cycles start: 17/02/2014

• Nominal operation mode

• Failure modes

• Transients

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Power measurements

Scope: Verify the power given by the software

Target power (W) Given power (W)DBQ 150 146

PETS unit 220 210

SAS 820 600

• DBQ • PETS • SAS• Compact Loads

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Air speed measurement

Scope‒ Measure actual air speed on the module surface‒ Observe the uniformity of air speed along the module as well as between the DB and MB‒ Provide these values as input to the module FEA simulator

Fans

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Air speed measurement

• The room air speed tuned to the nominal CLIC value of 0.7 m/s

• Measurement of air speed along the module at 5 points on the MB and DB.

• Measurement of air speed on grid of points covering the whole room

1 2 3 4 5

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Air speed measurement

Position Air speed MB (m/s) Air speed DB (m/s)

1 0.31 0.33

2 0.22 0.19

3 0.18 0.18

4 0.15 0.14

5 0.11 0.12

• The air speed is uniform between the DB and MB.

• The air speed decreases along the structure. This fact is expected taking into account the position of the fans.

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FEA simulator

1. Finalization of simulator based on heat transfer theory

2. Tuning of the simulator based on CLIC nominal values

3. Two simulations are currently running

• Air speed: 0.2 m/s• Room temperature: 20 and 40 oC• Power in components:

o DBQ 150 Wo PETS unit 220 Wo RFN loads 178 Wo SAS 820 Wo SAS loads 178 W

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Alignment measurements in transients

Steady-state: Full set of alignment measurements using all fiducials

Transients: Measurement of selected fiducials every 1 oC

• One PETS complete

• One DBQ complete

Drive Beam Main Beam

• SAS-1 complete

• SAS-x extremes (beginning and end)

*Photos: M. Duquenne