Content

Notes

TJ Lane has geometry-conversion scripts (currently psana/cheetah/crystfel, but cctbx will be added).  They can be obtained from github here:  https://github.com/LinacCoherentLightSource/psgeom

Below are tables that can be updated with time-ordered information (most recent at top of table):

• publicly-released geometry files
• comments for why new geometries might be needed (e.g. detector re-assembled, detector mis-cabled)

For use with all geometry formats used by LCLS (cxidb, crystfel, cctbx, psana).  This page would ideally include simple standalone scripts to convert between formats.

Optical measurements can be found HERE. Corrected optical metrology in text format can be found under the page CSPAD Alignment.

Access to calibration files on disk /reg/g/psdm/detector/alignment/

Geometries

Camera History

Camera1_V16_20140924

• Optical Metrology file: 
  • 2014-09-24-CXI-Camera1-Metrology.xlsx
  • <https://confluence.slac.stanford.edu/download/attachments/107749188/2014-09-24-CXI-DS1-Metrology.xlsx?version=1&modificationDate=1414457576000&api=v2>
• 2014-09-24 -- fixed and moved to DS2 chamber
  
  • mixed quadrants: 
    • 3 old A boards (Q0, Q1, Q2), 4/40
    • 1 new board (Q3), 3/19
• 2014-11-19 -- DS1 @ DSD
  
  • moved back to DS1 chamber in DSD location
  • Used for PCS, IH and cxig3616
• 2015-01-10 --  DS1 @ DSC location
  • Used for cxig1515
    • src = 'DetInfo(CxiDs1.0:Cspad.0)'
    • alias = DscCsPad
    • Relative detector Z position:  
      
      • alias = 'DscCsPad_z' 
      • pv = 'CXI:DS1:MMS:06.RBV'
• 2015-03-17 -- DS2 @ DSD location 
  
  • Camera 1 was moved to DS2 chamber at DSD location.
     
  • The previously broken D50 Concentrator was replaced with older concentrator.
    • Quadrants 2 and 0 were swapped.
  • Back detector (generally not used) for SC1 experiments from 2015-03-18 to 2015-05-04
    
    • src = 'DetInfo(CxiDs2.0:Cspad.0)'
    • alias = DsdCsPad
    • Relative detector Z position:  
      
      • alias = 'DsdCsPad_z' 
      • pv = 'CXI:DS2:MMS:06.RBV'
• 2015-05-04 -- DS2 @ DSD 
  
  • Cables for Camera 1 in DS2 corrected and collimator pipe removed from front DS1
  • Back detector for SC1 experiments from 2015-05-04 to 2015-05-17
    
    • src = 'DetInfo(CxiDs2.0:Cspad.0)'
    • alias = DsdCsPad
    • Relative detector Z position:  
      
      • alias = 'DsdCsPad_z' 
      • pv = 'CXI:DS2:MMS:06.RBV'

Camera2_V16_20150120

• 2015-02-02 -- DS2 chamber with refurbished Camera2 moved to DSA location
  • Non-standard configuration given D50 CsPad rack concentrator, which is normally used with DS2 chamber, was broken.
  • Used D51 CsPad rack for concentrator and motors Februatry 2015 experiments in the SC2 (a.k.a. SC01, 100nm focus chamber). 
    • cxig0715, cxie7015, cxie7515 and cxif5315
    • src = 'DetInfo(CxiDs2.0:Cspad.0)'
    • alias = DsaCsPad
    • Relative detector Z position:  
      
      • alias = 'DsaCsPad_z' 
      • pv = 'CXI:DS1:MMS:06.RBV'
    • Similarly, other relevant epicsStore aliases begin with DsaCsPad.
      
  • The mapping of the D50 concentrator is rotated by 90 relative to the D51 concentrator.
• 2015-03-03 -- Moved DS2 chamber with Camera2 to DSD location
  • Used for SPI experiment cxi86415
    • src = 'DetInfo(CxiDs2.0:Cspad.0)'
    • alias = DsdCsPad
    • Relative detector Z position:  
      
      • alias = 'DsdCsPad_z' 
      • pv = 'CXI:DS2:MMS:06.RBV'
  • Note pipe in front DS1 chamber detector during this experiment was removed, but the holder for it was still in providing circular aperture for back DS2 detector
• 2015-03-17 -- Added shield and pipe and moved Camera2 to DS1 chamber
  

  • Used for SC1 experiments starting at the end of Run10:

    • cxig0915, cxii6315, cxih0115, cxih0815, April PCS, cxih9515, cxii2415, ...
    • src = 'DetInfo(CxiDs1.0:Cspad.0)'
    • alias = DscCsPad
    • Relative detector Z position:  
      
      • alias = 'DscCsPad_z' 
      • pv = 'CXI:DS1:MMS:06.RBV'
  • Detector Attenuation from shields and coatings (pipe and additional shielding required for laser experiments):
    • CsPad Pipe Al Shield Transmission:

      • 8 um thick polyimide 

      • 1 um thick Al on upstream side

      • 1.75 um thick Al on downstream side

    • The detectors have 0.25 um thick Al coating.

    • --> 3 um total Al

• 2015-05-04 -- Removed shield and pipe from Camera2 in DS1 chamber
  

  • Used for SC1 experiments starting with cxih8015:

    • src = 'DetInfo(CxiDs1.0:Cspad.0)'
    • alias = DscCsPad
    • Relative detector Z position:  
      
      • alias = 'DscCsPad_z' 
      • pv = 'CXI:DS1:MMS:06.RBV'

Camera2_V16_20140827

• 2014-08-27 -- Refurbished Camera2 installed in DS1 chamber
  • Metrology:
    • 2014-08-27-CXI-DS2-Metrology.xlsx
  • Quad 1 (zero based counting) reworked; metrology updated, the other 3 quads (Q0, Q2, Q3) are unchanged (as in the previous metrology: May 14, 2014).
  • Used for Run 10 experiments from 2014-10-16 until it was damaged in November 2014 (cxig2614, cxif7214, cxie7914, Nov PCS)
    
    • src = 'DetInfo(CxiDs1.0:Cspad.0)'
    • alias = Ds1CsPad
    • Relative detector Z position:  
      • no alias defined
      • pv = 'CXI:DS1:MMS:06.RBV'

Camera1_V16_20140319

• 2014-03-19 -- Camera1 rebuilt
  • Metrology:
    • 2014-03-19-CSPAD-CXI-DS1-Metrology.xlsx
    • Quad 1 (zero based counting) reworked; metrology updated, the other 3 quads (Q0, Q2, Q3) are unchanged (as in the previous metrology: May 14, 2014).
  • Used as:
    • Front detector at DSC for SC1 experiment IH Milathianaki cxii0114 (damaged asic with laser) and cxid8114
    • Moved to DSA location for SC2 chamber experiments for cxic9714 and cxid5514
    • cxid2714 (moved to back detector after Z motor issues during cxid2714)
  • Info:
    
    • src = 'DetInfo(CxiDs1.0:Cspad.0)'
    • alias = Ds1CsPad
    • Relative detector Z position:  
      • no alias defined
      • pv = 'CXI:DS1:MMS:06.RBV'

Camera1_V16_20131220

• 2013-12-20 -- Camera1 upgraded to V16
  • Metrology:
    • 2013-12-20-CSPAD-CXI-DS1-Metrology.xlsx
  • Front detector for SC1 experiments starting in January 2014 including January PCS, cxia2514, cxii0214, cxib3214, cxib6714.
    
    • src = 'DetInfo(CxiDs1.0:Cspad.0)'
    • alias = Ds1CsPad
    • Relative detector Z position:  
      • no alias defined
      • pv = 'CXI:DS1:MMS:06.RBV

Camera2_V16_20131212

• 2013-12-12 -- Camera2 upgraded to V16
  • Metrology:
    • 2013-12-12-CSPAD-CXI-DSD-Metrology.xlsx
  • Used for experiments???.
    
    • src = 'DetInfo(CxiDsd.0:Cspad.0)'
    • Relative detector Z position:  
      • pv = 'CXI:DS2:MMS:06.RBV'
• 2014-06-02 -- Ds2 chamber moved to DSC location
  • Changed name from CxiDsd (36) to CxiDs2 (33) in both the cxi.cnf file and the configdb CsPad02 definition.
  • Used as front detector for cxid6214, cxid9114, cxic4414, cxid5714, cxid6014, July 2014 PCS, cxic8214
    • src = 'DetInfo(CxiDs2.0:Cspad.0)'
    • Relative detector Z position:  
      • pv = 'CXI:DS2:MMS:06.RBV'
  • Detector upside down?

Camera3_V16_20131009

• Metrology file:
  • 2013-10-09-CSPAD-XPP-Metrology.xlsx
• Out of vacuum camera typically used in XPP and XCS.
• 2014-12-17 -- Used in CXI at DG4 location in December 2014.
  • XCS concentrator
  • D50 MPOD power
  • Detector quads rotated 90 deg
  • src = 'DetInfo(CxiDg4.0:Cspad.0)'
  • Relative detector Z position:  
    
    • alias = 'Dg4CsPad_z' 
    • pv = 'CXI:DG4:MMS:16.RBV '

References

Documentation on data formats

• cxidb - web documentation
• crystfel - page of T. A. White at DESY
• cctbx - sourceforge
• psana - confluence

Relevant documents, publications

• cheetah - github, Anton Barty
• dxtbx-the diffraction experiment toolbox, Aaron Brewster
• XFEL Detectors and ImageCIF
• Diffraction Geometry, D.J.Thomas
• Calibration Management Tool (calibman)
• CSPAD Alignment - alignment summary
• psgeom - T.J. Lane converter between geometry formats in github