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EPICS at APS Beamlines

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Other custom infrastructure (e.g., autosave, recDynLink, saveData) ... Autosave (save parameters through reboot) saveData (store scan data to disk) ... – PowerPoint PPT presentation

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Title: EPICS at APS Beamlines


1
EPICS at APS Beamlines
  • Tim Mooney
  • Advanced Photon Source
  • Argonne National Laboratory

2
EPICS applications for synchrotron
beamlines(synApps)
synApps overview
  • Standard EPICS base extensions
  • Standard EPICS modules (e.g., MPF)
  • synApps modules (std, motor, MCA)
  • synApps-compatible clients (e.g., scan-data
    display)

3
synApps
synApps overview
  • Custom EPICS records
  • Custom EPICS device-support modules
  • Other custom infrastructure (e.g., autosave,
    recDynLink, saveData)
  • Custom EPICS databases, MEDM displays
  • Custom clients (e.g., scanSee)
  • Matched to a version of EPICS base

4
Just to clarify
synApps overview
  • We didnt write everything in synApps
  • One function of synApps is to bundle compatible
    versions of selected EPICS software wherever
    developed into a single tar file that can
    easily be built and configured to run 80 of a
    beamline
  • Second function is to provide generic tools that
    have proven themselves useful in the development
    of custom support

5
Basic record/device support
synApps overview
  • Motor
  • Scaler
  • Multichannel analyzer
  • Multichannel scaler
  • Serial (RS-232)
  • GPIB
  • ADCs
  • DACs
  • Encoders
  • Optical table
  • String calc, sequence
  • Complex expressions
  • Enhanced PID
  • Scan
  • Scan parameter
  • Generic VME

6
Layered devices, techniques(databases, SNL
programs, )
synApps overview
  • Optical tables
  • Slits
  • Mirrors
  • Monochromators
  • Piezo controller
  • Digital Multimeter
  • Current preamplifier
  • Interpolation
  • N-step measurement
  • Serial I/O block
  • GPIB I/O block
  • Autocollimator
  • Temperature controller
  • X-ray microscope
  • Insertion device
  • Filter/shutter

7
Other support
synApps overview
  • Autosave (save parameters through reboot)
  • saveData (store scan data to disk)
  • Clients to display scan/MCA data
  • Programs to handle MDA, NeXus data files
  • recDynLink (adds notify-when-done link)
  • used by sscan, swait records

8
Motors
synApps overview
  • Stepper, servo
  • Oregon Microsystems
  • Newport
  • Intelligent Motion Systems
  • McClennan
  • Soft support

9
Scalers
synApps overview
  • Multiple preset scalers
  • Background count interrupted by data-acquisition
    count
  • User-programmable end calculations
  • Joerger, Struck hardware

10
Multichannel analyzer
synApps overview
  • Canberra AIM
  • XIA DXP
  • 32 regions of interest
  • Halt acquisition on ROI preset
  • Background subtraction for ROI sums
  • Also supports sampling ADC (Acromag IP-330)

11
Serial O/I Block
synApps overview
  • Combination of
  • string calc to construct output message
  • serial record to send and/or receive
  • string calc to parse reply
  • Intended for run-time programming
  • Similar GPIB support

12
Optical table
synApps overview
  • 5/6-motor optical table
  • User specifies point about which table rotates
  • Exact virtual-to-motor and motor-to-virtual
  • Specific geometries (adding a new geometry is
    hard)

13
Monochromators
synApps overview
  • Nondispersive (standard)
  • Dispersive (high resolution)
  • Nested, in-line
  • Spherical grating (low energy)

14
Miscellaneous
synApps overview
  • Slit
  • Sample Wheel
  • 4-step measurement

15
String Expressions
synApps overview
  • Extends CALC record to combine string and numeric
    expressions
  • Useful for run-time programming of serial devices
  • EPICS links are programmable at run time

16
Scans
synApps overview
  • Multidimensional
  • 4 positioners, 4 detector triggers, 70 signals
  • saveData client writes to NFS disk
  • Can acquire arrays (e.g., MCA spectra)
  • 300 Hz on MV162
  • Start/end, table, on-the-fly
  • Also for 1-dimensional automated alignment

17
Clients
synApps overview
  • MCA display (IDL program)
  • scanSee (IDL program for 1D, 2D, 3D data)
  • Plot.py (Python demonstration)
  • PVMail (send email when PV value violates
    boundary)
  • Misc. experiment-specific user interfaces in
    tcl/tk, python/tk, Igor, IDL, java
  • Channel Archiver
  • BackUp/Restore Tool
  • StripTool (strip chart)

18
Autosave/restore
synApps overview
  • Saves PV values (e.g., motor positions, scan
    config) through reboot
  • Defends against crash during save operation
  • Typically 80 values saved every 5 s, 3000 values
    every 30 s
  • Include files
  • Macro substitution
  • Dated backups
  • Choose save/restore directories
  • Request-file path
  • Can put request files in same directory as
    database files

19
CCD support
  • CA server on CCDs native platform
  • Calls vendor-supplied software
  • Stores images to local disk (HDF format)
  • Some simple image analysis
  • Hosts EPICS PVs for control

20
String calculations
Recent progress
  • Operators gt? and lt? (max, min)
  • Example Alt?B
  • Variable of args for MAX, MIN functions
  • Example MAX(A,B,C,MIN(D,E))
  • Much faster that previous versions
  • Numeric ops are 1-4 ms (10) slower than
    calcPerform (on MV162)
  • (compare to 4 ms added for isnan/isinf check)
  • No memory fragmentation

21
Save_restore request-file path
Recent progress
  • Can put standard request files with databases
  • Database developer writes default request file
  • Easy version control
  • Can override a standard request file with a local
    copy (at any include level)

22
Conversion to 3.14
Recent progress
  • In progress, collaborators
  • Mark Rivers (CARS-CAT)
  • Jens Eden (BESSY)
  • Kate Feng (NSLS)
  • Till Straumann (SLAC)
  • Most of synApps compiles at least, some has been
    tested, some is even OSI

23
Python tools
Recent progress
  • We use caPython
  • Geoff Savage (FNAL)
  • mcaDisplay.py mcaPeakFit.py
  • Mark Rivers (CARS)
  • plot.py

24
For more information
  • www.aps.anl.gov/xfd/bcda
  • cars.uchicago.edu/gsecars/index.html
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