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CAL (XPcal)

tatsuki.washimi - 17:54 Thursday 07 April 2022 (20399)

Hammering (Shaker injection) for XPcal, 2022-04-07

[DanChen, Darkhan, Yokozawa, Washimi]

Today we performed the shaker injection test for XPcal.
Details are reported here. : https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=14019

When we shake the Rx module, Tx module, Leg of EXA, and body of EXA by the shaker (2~3 orders larger than normal), we couldn't see the excess in the Rx PD.
Only when we rampaged on the square ground of the chamber (without touching the chamber body), we observed a little excess.

Images attached to this report

Comments to this report:

tatsuki.washimi - 13:07 Friday 08 April 2022 (20412)

I analyzed yesterday's data with the coupling function model.

Note that this analysis might not be appropriate for "Jogging" data, due to some non-linear coupling or multiple coupling paths.

Images attached to this comment

20412_1649390424_Shaker_Rx_broadband.xml.png

20412_1649390429_Shaker_Tx_broadband.xml.png

20412_1649390460_Shaker_Chamber_broadband.xml.png

20412_1649390466_Shaker_BerrowsLeg_broadband.xml.png

20412_1649390471_Jogging_BerrowsLeg.xml.png

20412_1649390477_Acoustic_broadband.xml.png

dan.chen - 16:38 Friday 08 April 2022 (20425)

I analyzed demodulated signal of Pcal lines, and the effect from the injected vibration on Pcal uncertainty could not be observed except for the "jogging" data.

Even in the case of jogging data, the generated uncertainty was about 0.3% at maximum.

Details: link

takaaki.yokozawa - 7:37 Thursday 21 April 2022 (20540)

I tried to evaluate the coherence between XPCal line and Sensors of ETMX suspensions.
IM photosensor, MN photosensor and BF LVDT are "NO" coherence with PCal lines.

Images attached to this comment