M1H Transfer Function

M1H Transfer Function

Georg Gassner, March 6th, 2013

2LCLS-II Phys. Meeting / March 6, 2013

Measurement Setup

Seismometer

Seismometer

Vibco

Buttkicker


M1H Background Noise – X-Axis


M1H Background Noise – Y-Axis


Vibrating the Stand

Buttkicker

43.6Hz


Applied Freq. vs. X-Axis Sensor on Top

31nm Amplitude

3nm Amplitude

3µm Amplitude


Applied Freq. vs. Y-Axis Sensor on Top

Y- motion mostly caused by crosstalk due to sensor placement off axis

3nm Amplitude


Vibrating the Floor

Vibco


Applied Freq. vs. X-Axis Sensors

31nm Amplitude 3nm Amplitude


Applied Freq. vs. Y-Axis Sensors

3nm Amplitude 3nm Amplitude


Result - Transfer Function

- Y-axis vibration 1=1- X-axis response varies

by the induced frequency.


Construction Activity test Aug 1st 2012

Road Header• M1H top 1.0µm @ 24Hz (27; 29)• M2H top 0.1µm @ 20Hz• M1H floor 0.3µm @ <20Hz

Integrated raw data:

Statistics @ 23Hz


Construction Activity test Aug 1st 2012

Concrete Drill• M1H top 0.1µm @ 30Hz (24; 45)

Integrated raw data:

Statistics @ 30Hz


Outlook

Mirror yaw measurements:- No measurement device available to measure yaw

movement with 1µrad resolution @100Hz sampling rate.- Solution: Use x-ray beam to measure effect of mirror

vibration in FEH.- Install vibration device and seismometer sensors on

PAMM of 3/20.Measure construction activity:- Installed sensors in BTH today. - Construction activities and vibration measurements on

3/19.

Construction Equipment Activities – Sensor Placement

Slide 15

QT41, 42, 43

QUM1 &2

QEM1 & 2

Construction Activities


Sensors on QUM#1 & #2 and QEM#1 & #2


Sensors on QT41, QT42 & QT43

M1H Transfer Function

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