M1H Transfer Function
Georg Gassner, March 6th, 2013
2LCLS-II Phys. Meeting / March 6, 2013
Measurement Setup
Seismometer
Seismometer
Vibco
Buttkicker
3LCLS-II Phys. Meeting / March 6, 2013
M1H Background Noise – X-Axis
4LCLS-II Phys. Meeting / March 6, 2013
M1H Background Noise – Y-Axis
5LCLS-II Phys. Meeting / March 6, 2013
Vibrating the Stand
Buttkicker
43.6Hz
6LCLS-II Phys. Meeting / March 6, 2013
Applied Freq. vs. X-Axis Sensor on Top
31nm Amplitude
3nm Amplitude
3µm Amplitude
7LCLS-II Phys. Meeting / March 6, 2013
Applied Freq. vs. Y-Axis Sensor on Top
Y- motion mostly caused by crosstalk due to sensor placement off axis
3nm Amplitude
8LCLS-II Phys. Meeting / March 6, 2013
Vibrating the Floor
Vibco
9LCLS-II Phys. Meeting / March 6, 2013
Applied Freq. vs. X-Axis Sensors
31nm Amplitude 3nm Amplitude
10LCLS-II Phys. Meeting / March 6, 2013
Applied Freq. vs. Y-Axis Sensors
3nm Amplitude 3nm Amplitude
11LCLS-II Phys. Meeting / March 6, 2013
Result - Transfer Function
- Y-axis vibration 1=1- X-axis response varies
by the induced frequency.
12LCLS-II Phys. Meeting / March 6, 2013
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
13LCLS-II Phys. Meeting / March 6, 2013
Construction Activity test Aug 1st 2012
Concrete Drill• M1H top 0.1µm @ 30Hz (24; 45)
Integrated raw data:
Statistics @ 30Hz
14LCLS-II Phys. Meeting / March 6, 2013
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
16LCLS-II Phys. Meeting / March 6, 2013
Sensors on QUM#1 & #2 and QEM#1 & #2
17LCLS-II Phys. Meeting / March 6, 2013
Sensors on QT41, QT42 & QT43
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