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Automation and remote control at GM/CA CAT at the APS

  • August 2011
  • Acta crystallographica. Section A, Foundations of crystallography 67(a1):C279-C279
DOI:10.1107/S0108767311093019
Authors:
Craig Ogata at Argonne National Laboratory
Craig Ogata
R. Sanishvili
R. Sanishvili
R. Sanishvili
  • This person is not on ResearchGate, or hasn't claimed this research yet.
M. Hilgart
M. Hilgart
M. Hilgart
  • This person is not on ResearchGate, or hasn't claimed this research yet.
S. Stepanov
S. Stepanov
S. Stepanov
  • This person is not on ResearchGate, or hasn't claimed this research yet.
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Poster Sessions
C279
even greater frame rates if hardware binning is used.
With this new mode of operation we are able to obtain ultra-ne
sliced data (0.002º) on reasonable time scale (3º/min). This means that
rocking curve evolution can be mapped with high resolution while
cooling through a phase transition. Fine slicing also offers a novel
method for wavelength calibration by measuring many Friedel pairs
from a standard granular powder material, such as NIST LaB6.
At the price of smearing some reections during the frame transfer,
single crystal data are also available much more quickly than before.
Intensity errors due to frame transfer depend on the rocking width
of the crystal compared to the angular widths of the integration and
transfer steps. Very sharp reections that arrive during transfer may be
completely corrupted so that these should be identied and removed
during integration and scaling. For broader rocking curves, particularly
where reections are present on several frames, the main concern
is that weak peaks could be contaminated by smearing from strong
peaks. In practice these problems are not serious, as demonstrated by
the commissioning studies that will be presented.
[1] J. C. Labiche et-al, Rev. Sci. Instrum. 2007, 78, 091301.
Keywords: Experimental, Fast, Detector.
MS13.P10
Acta Cry st. (2011) A67, C279
Automation and remote control at GM/CA CAT at the APS
Craig M. Ogata,a Ruslan Sanishvili,a Mark Hilgart,a Sergey Stepanov,a
Michael Becker,a Venugopalan Nagarajan,a Shenglan Xu,a Oleg
Makarov,a Sudhir Pothineni,a Derek Yoder,a Stephen Corcoran,a
Janet L. Smith,b and Robert F. Fischetti,a aGM/CA-CAT, Biosciences
Division, Argonne National Laboratory, Argonne, IL 60439, USA. bLife
Sciences Institute, Department of Biological Chemistry, University of
Michigan, Ann Arbor, MI 48109, (USA). Email:ogata@anl.gov
GM/CA CAT, sector 23 at the APS, encompasses two insertion
device beamlines and one bend magnet beamline. The X-ray sources
for the insertion device beamlines are a pair of canted undulators.
All of the beamlines are controlled via a Graphical User Interface
(GUI) based on the tab-style organization and presentation of SSRL’s
BluIce. The GM/CA-CAT implementation (JBluIce-EPICS), which
communicates with the hardware through lower level EPICS control
software, has evolved to include a variety of features that exploit
the small beam size and divergence properties of this 3rd generation
source.
In terms of automation, experimenters operate the beamlines
with the same GUI whether they are using local control (sitting at
the beamline) or remote control (anywhere with a valid IP). Remote
access is directed through NX or Teamviewer servers to the beamline
computers. This has allowed the users to gain experience in person
then smoothly transition to remote control. The system has grown
to include the necessary indicators for the synchrotron ring status
and controls for the shutters, automounter and mini-beam. The
automounters are modied versions of the Berkeley/ALS robots.
These are pneumatically controlled systems coupled to motor-
controlled Dewars that efciently deliver samples from the Dewar to
the goniostat. Hardware improvements to the pin base sensors and
collets improved robot reliability and led to increasing user demand.
All of the necessary coordination of commands to control the selection,
mounting, loop and crystal centering, washing and annealing are
housed in the Screening Tab or a Tools sub-Tab of the Sample Tab
of JBluIce-EPICS. Future developments in the automation include
the commissioning of a new Cartesian Robot in collaboration with T.
Earnest and C. Cork, Lawrence Berkeley National Lab.
Two features in the automation of the data collection, the Raster Tab
and vector collect feature, are continually improving in the JBluIce-
EPICS system and take advantage of the micron-sized mini-beams (5,
10, and 20 um). At present the mini-beams are produced by accurate
placement of the appropriate sized pinhole to restrict a larger focused
beam. The system has evolved from the use of a single collimator to
a single-button selection from a uni-body quad collimator. The tool
has spawned the development of automated 2D rastering techniques
(Raster Tab) to locate small or hidden crystals or better diffracting
regions in larger crystals. For data collection, a feature to move the
sample along a 3D vector has been incorporated into the Collect
Tab. Improvements for a seamless transition from regions of interest
identied in the Raster Tab and the expansion of options in the vector
collect mode are currently underway. Here we will present a status
report on automation and remote control applications available at the
GM/CA CAT beamlines.
GM/CA CAT is supported by the National Cancer Institute (Y1-CO-
1020) and the National Institute of General Medical Sciences (Y1-
GM-1104) of the NIH.
Keywords: automation, macromolecular, synchrotron
MS13.P11
Acta Cry st. (2011) A67, C279
Automated in-situ diffraction screening at beamline X06DA at
the swiss light source
Meitian Wang, Vincent Olieric, Christian Stirnimann, Rouven
Bingel-Erlenmeyer, Joerg Schneider, Jose Gabadinho, Ezequiel
Panepucci, Takashi Tomizaki, Xiaoqiang Wang, Roman Schneider,
Claude Pradervand, Wayne Glettig, Andreas Isenegger, Clemens
Schulze-Briese. Swiss Light Source at Paul Scherrer Institut, CH-
5232 Villigen, Switzerland. E-mail: meitian.wang@psi.ch
X06DA is the third macromolecular crystallography beamline at
the Swiss Light Source. It has been designed to fulll the requirements
of both academic and industrial users. To achieve maximum
efciency, high degree of automation was implemented from the
optics to the experimental environment. A Bartels dual channel cut
monochromator (DCCM) ensures rapid energy changes (6 – 18 keV)
with a true xed exit. The obtained X-ray beam has a focal spot size of
80 x 45 microns at the sample position and a total photon ux of 51011
photons/sec at 12.4 keV. The mini-hutch end-station allows both rapid
manual mounting and robotic sample exchange.
In addition, a crystallization facility, directly adjacent to the X06DA
mini-hutch, has been implemented. Crystallization experiments are
performed using nano-dispensing robots and drops inspection is done
via an automated imaging system. The unique feature of this facility
is the possibility to test the crystals for diffraction directly in the
crystallization plates (in situ screening) by transferring them from
the crystal hotel to the mini-hutch in an automated manner. Without
any manipulation to the crystals, this gives users a rapid feedback
on important parameters such as diffraction limit, anisotropy,
cell parameters or mosaicity, and aids to prioritize subsequent
optimization steps. Moreover, users are welcome to bring any kind of
SBS standard crystallization containers, including microuidic chips
and the CrystalHarpTM which yield a particularly low background in
the diffraction image.
First results obtained at the crystallization facility and future
improvements will be presented. Other methodological developments
such as a new type of multi-axis goniometer and phasing with weak
anomalous scatterers will be described as well.
Keyword: Beamline automation, in-situ Diffraction Screening,
crystallization
P.MS.12P.MS.13
CONGRESO 2011.indb 279 20/07/2011 11:52:58
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