Undulator Physics Issues Heinz-Dieter Nuhn, SLAC / LCLS October 30, 2007
SSRL/LCLS Users Meeting SLAC 2014-10-09
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Transcript of SSRL/LCLS Users Meeting SLAC 2014-10-09
SSRL/LCLS Users MeetingSLAC
2014-10-09
Filipe R. N. C. MaiaLab. of Mol. Biophysics
Uppsala University
Data collection at XFELs:the Data Deluge
Data Deluge
Special Issue:Dealing with Data, Science, February 2011
“Most scientific disciplines are finding the data deluge to be extremely challenging, and tremendous opportunities can be realized if we can better organize and access the data.”
-- Science Staff
Data Production vs. Storage
• “In 2007 the world produced more data that could fit in the world’s storage”.
• Data is growing
at 58% while
storage is growing
at 40%.
• The sensor (or
the experiment) is
no longer the
bottleneck.Baraniuk, R.G. More is less: signal processing and the data deluge. Science (New York, N.Y.) 331, 717-9 (2011).
Tales of a Particle Physicist
Sigfried Bethke working on the JADE detector in 1984.
Curry, A. Rescue of old data offers lesson for particle physicists. Science (New York, N.Y.) 331, 694-5(2011).
The JADE Lead-Glass
Electromagnetic Shower Detector
The Petra ring at DESY
Data Availability
• “Science is driven by data.”
• “…making data widely available is an essential element of scientific research.”
• “it is a growing challenge to ensure that data… are appropriately described, standardized, archived and available to all.”• “We must all accept that science is data and that data are science, and thus provide for, and justify the need for the support of, much improved data curation.”
Hanson, B., Sugden, A. & Alberts, B. Making data maximally available. Science (New York, N.Y.) 331, 649 (2011).
Coherent X-ray Imaging Data Bank
Goals:
• Help to maximize results obtained from data
• Facilitate the reproducibility of results
• Allow theoreticians to test their ideas on real data
• Expand the community beyond those lucky few who got beamtime.
• Preserve datasets for future analysis.
Reproducibility
• CXIDB aims to foster reproducible research.
Jon Claerbout, geophysics professor at Stanford
• Experimental data is crucial to reproducibility
• CXIDB also maintain a list of relevant software
“An article about computational science in a scientific publication isn’t the scholarship itself, it’s merely advertising of the scholarship. The actual scholarship is the complete software development environment and the complete set of instructions which generated the figures.”
-- Jon Claerbout
Maximize Efficiency of the Facilities
• 4th generation Light sources produce mountains of data
• They are serial, as opposed to synchrotron’s parallel nature.
• The result is a few groups with too much data.
• While others are data starved.
• Sharing is a clear solution.