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Title: NSLS-II Ground Vibration Stability Studies and Design Implementation

Journal Article · · Synchrotron Radiation News
 [1];  [2];  [3];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Colin Gordon Associates, Brisbane, CA (United States)
  3. HDR, Alexandria, VA (United States)

We report that next-generation synchrotron accelerator facilities pushing the envelope of resolution to just a few nanometers and possibly atomic scale (~1 nm) require extreme stability of their experimental setting. Such stability is greatly influenced by the background micro-seismic activity and natural disturbance sources that are present throughout the globe and the cultural, man-made noise stemming from traffic on nearby highways and railways, operating machinery, and other activities. Defenses against such negatively impacting environment include smart conventional design of facilities, isolation of experiments, careful consideration of the selected site by providing ample distance from sources or protection by depth and, most importantly, qualification/quantification of the ground vibration environment both in terms of amplitude and spectral characteristics. Qualification and quantification of the site-specific noise environment may be utilized in the implementation of defense features in the design of the facility and high-sensitivity experiments. The performance is measured by the adherence to specific stability criteria that are ever-demanding, given the nature of the experiments that are sought where resolution down to a few nanometers is required. Furthermore, the selection of the optimal site and the quantification of the unavoidable background noise are important aspects to be considered in assessing the performance of such facilities.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1580247
Report Number(s):
BNL-212483-2019-JAAM
Journal Information:
Synchrotron Radiation News, Vol. 32, Issue 5; ISSN 0894-0886
Publisher:
Taylor & FrancisCopyright Statement
Country of Publication:
United States
Language:
English

References (3)

Achieving Vibration Stability of the NSLS‐II Hard X‐ray Nanoprobe Beamline conference January 2011
Single station determination of Rayleigh wave ellipticity by using the random decrement technique (RayDec) journal January 2009
Effect of surface layer stochasticity on seismic ground motion coherence and strain estimates journal January 1997