First birds flyInstituteCity, Country

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First birds fly Institute City,
Country Name distance Km Accelerator Yingbing
9329 SSRF Shanghai, China Om 6227 Igor 6227
NSLS-2 Brookhaven, USA Yuke 6227 Frank
980 Gero 980 PETRA-3 Hamburg, Germany Igor
980 Michael 893 DLS Didcot, UK Peter
718 DELTA Dortmund, Germany Stefano
630 ELETTRA Trieste, Italy Andrej
620 Instrumentation Solkan, Slovenia Peter
620 Technologies Angel 508 ALBA Barcelona,
Spain Nicolas 484 SOLEIL Paris, France
____ 35525 Km  !!
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Libera Users meetings (1.5 days) SOLEIL,
Paris, July 2007 ALBA, Barcelona, April
2008 ESRF, Grenoble, June 2009
Libera Workshops (2-3 days) organized by I-Tech
in Slovenia Autumn 2006 Autumn
2007 Autumn 2008 Autumn 2009
practical sessions, presentations of
products, user presentations, some discussions
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The meeting's main purpose is to exchange
relevant information, experience and knowledge of
mutual interest on the practical use of the
Liberas for Orbit measurement and Orbit
stabilization in a large accelerator
complex. a BPM system serves basically 3
goals -1- providing position data of low
latency high rate (10KHz), in a very
reliable manner, to a system for global orbit
stabilization purposes, thereby
stabilizing the User's photon beams -2-
providing detailed info on the electron beam
characteristics that can be extracted
from a BPM station, thereby satisfying
the requirements for detailed beam dynamics
studies -3- providing a reliable Interlock on
excessive beam displacements
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for probably the first time in the history of
accelerators, a major component, i.e. the BPM
system, in these different accelerators is now
being realized by an identical system the
Libera So the various users of this Libera
system should continue to exchange their
experiences and continue to think of possible
improvements
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But are our BPM systems really identical, or even
similar ??
Electron Brilliance
1.4, 1.6 1.8, 2.0, 2.2,
different versions
Control
Epics Tango Tina
Libera
device server
firmware release
fast links
Feedback or Orbit- Stabilizer
protection for peak voltages
C.C. F-Eth. TbT
gentle (CW) nasty fillings
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small questionnaire on firmware versions
the Libera Users are a diverging community . .
. . What about future versions . . . ?
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tomorrows program (9-12am) of using our Storage
Ring and the 224 Liberas for measuring
demonstrating certain features, beam behaviour,
etc.
We can fill the machine with 2 extremely
different fill patterns e.g. pure single
bunch uniform fill (all 992 bunches
filled) look at ADC, DD and SA data, at both
Sum and Position values, while switching on-off
our present fast feedback system while decaying,
and/or ramping-up, while kicking the beam,
shaking the beam, while changing Libera setting
parameters (DSC, gain, offset-tune,
switching-delay, trigger-delays, time-phase,
etc.) We can even intervene on the hardware if
requested . Please give your input
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• We can
• Fill (filling pattern 7/8 ?)
• Look at SA data all BPMs
• - fast feedback is ON change gaps
• - fast feedback is OFF change gaps
• ?the effect of our feedback, also its limitation
  (due to limited N steerers)
• Look at SA data all BPMs
• - then fix all Liberas to an attenuator
  setting
• - change that attenuator setting
  (drastically)
• See the effect on position measurement (look at
  some good bad ones)
• Do shot-by-shot filling

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