1. LHC CRAB CAVITY DQW Mechanical Instrumentation status MECHANICAL MEASUREMENT LABORATORY GALLAY EUGENIE

2. Validation tests – Temperature impact PT100 strain gages fine wires for connexions

3. Modus operandi with all screws: Tested at 473 K during0 min5 min10 min15 min30 min Tested at 77 K during0 min5 min10 min15 min30 min

4. Apparent strain values vs temperature

5. Statistical results of apparent strain Screw 1 a/bScrew 2 a/bScrew 3 a/bScrew 4 a/bScrew 5 a/bAVERAGE Standard derivation Uncertainty of reproducibility °C um/m 180-380.12-417.50-416.31-489.75-394.94-419.7237.6916.856 160-335.16-379.66-379.38-443.30-345.27-376.5537.8516.928 140-275.06-324.60-319.45-368.69-284.96-314.5533.1414.821 120-209.47-260.40-251.17-287.52-217.98-245.3128.5512.767 100-147.83-194.92-184.38-209.89-153.50-178.1123.8910.686 80-90.66-129.21-120.90-137.25-92.91-114.1919.028.507 60-39.92-66.19-61.65-70.20-40.53-55.7012.925.779 403.79-6.10-6.23-5.913.79-2.134.842.163 2033.9235.3533.0342.8538.1436.663.551.586 046.4950.7947.5766.1352.2052.647.063.158 -2043.0743.2442.7868.8945.2048.6410.164.546 -4018.5415.7218.6949.2810.8622.6213.636.095 -60-31.02-37.19-28.113.68-53.30-29.1918.608.319 -80-111.40-120.32-101.58-72.59-151.60-111.5025.6811.486 -100-217.21-228.86-200.43-175.54-271.45-218.7031.8914.261 -120-373.10-397.31-356.34-334.30-457.26-383.6642.1918.866 -140-526.11-547.88-499.49-477.27-615.99-533.3547.7221.340 -160-630.49-639.14-592.97-570.40-714.23-629.4449.2022.001 -180-756.73-748.22-706.70-682.39-835.23-745.8552.2923.386 u(A)23.39um/m U(k=2)47um/m Type A evaluation: uncertainty of reproducibility: Standard deviation:

6. Tightening tests

7. Status -20 screws (waiting for new wondered strain gages) -6 females Fischer connectors + connector 3M 40 pins (+ 1 spare) -4 males Fischer connectors

8. Status -10 screws -2 males Fischer connectors -800 mm length of fine wires