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Alignment procedure

Alignment procedure for CSPAD2x2 is very similar to CSPAD alignment for quads described in
CSPAD Geometry and Alignment - Old.
The only difference is that CSPAD2x2 has only two 2x1 sensors, that makes everything much simpler.

Optical measurements

Photos and charts with numeration of corners in otical measurements:

Metrology table

Metrology table in xlsx format:
Metrology-140ks-Feb13-2013.xlsx

The xlsx file is converted to tables in text format for 6 CSPad2x2 detectors:

Quality check and alignment parameters

CSPad2x2-1.txt Q133 D7A16

pair:        S1      S2     dS1     dS2        L1      L2     dL1     dL2    <dS/L>  angle(deg)      D1      D2      dD   d(dS)   d(dL)
pair: 0   20909   20902       2      -5     43538   43539       0       1   -0.00006   -0.00329   48297   48297       0       7      -1
pair: 1   20906   20902       2      -2     43538   43538       0       0    0.00000    0.00000   48296   48296       0       4       0

center/0-end.data (in pixels)

 198.05  198.42 
  95.10  307.54 
   0.09    0.03

tilt/0-end.data (in degree)

-0.00329  0.00000

CSPad2x2-2.txt Q110 D#A14

pair:        S1      S2     dS1     dS2        L1      L2     dL1     dL2    <dS/L>  angle(deg)      D1      D2      dD   d(dS)   d(dL)
pair: 0   20905   20896       5      -4     43536   43536      -2      -2    0.00001    0.00066   48291   48294      -3       9       0
pair: 1   20905   20905     -22     -22     43540   43536      10       6   -0.00051   -0.02895   48294   48299      -5       0       4

center/0-end.data (in pixels)

 198.03  198.94 
  95.09  306.84 
   0.18    0.21

tilt/0-end.data (in degree)

 0.00066 -0.02895

CSPad2x2-3.txt Q111 D12A18

pair:        S1      S2     dS1     dS2        L1      L2     dL1     dL2    <dS/L>  angle(deg)      D1      D2      dD   d(dS)   d(dL)
pair: 0   20907   20908      -5      -4     43540   43545       0       5   -0.00005   -0.00263   48302   48301       1      -1      -5
pair: 1   20904   20907     421     424     43538   43538    -203    -203    0.00970    0.55601   48299   48299       0      -3       0

center/0-end.data (in pixels)

 198.06  196.67 
  95.08  308.15 
   0.17    0.23

tilt/0-end.data (in degree)

-0.00263  0.55601

CSPad2x2-4.txt Q135 D19A19

pair:        S1      S2     dS1     dS2        L1      L2     dL1     dL2    <dS/L>  angle(deg)      D1      D2      dD   d(dS)   d(dL)
pair: 0   20906   20905      -8      -9     43540   43540       3       3   -0.00020   -0.01119   48297   48299      -2       1       0
pair: 1   20908   20898     -12     -22     43541   43538      12       9   -0.00039   -0.02237   48299   48295       4      10       3

center/0-end.data (in pixels)

 198.07  198.70 
  95.06  307.79 
   0.24    0.30

tilt/0-end.data (in degree)

-0.01119 -0.02237

CSPad2x2-5.txt Q022 D15A15

pair:        S1      S2     dS1     dS2        L1      L2     dL1     dL2    <dS/L>  angle(deg)      D1      D2      dD   d(dS)   d(dL)
pair: 0   20904   20904       2       2     43536   43536      -1      -1    0.00005    0.00263   48294   48294       0       0       0
pair: 1   20908   20909     122     123     43540   43545     -61     -56    0.00281    0.16119   48302   48302       0      -1      -5

center/0-end.data (in pixels)

 198.03  197.12 
  95.10  307.60 
   0.03   -0.11

tilt/0-end.data (in degree)

 0.00263  0.16119

CSPad2x2-6.txt Q157

pair:        S1      S2     dS1     dS2        L1      L2     dL1     dL2    <dS/L>  angle(deg)      D1      D2      dD   d(dS)   d(dL)
pair: 0   20903   20900      59      56     43541   43539     -27     -29    0.00132    0.07567   48296   48297      -1       3       2
pair: 1   20979   20977      49      47     43707   43705     -20     -22    0.00110    0.06292   48481   48477       4       2       2

center/0-end.data (in pixels)

 197.93  196.92 
  95.34  307.53 
  -1.60   -3.63

tilt/0-end.data (in degree)

 0.07567  0.06292

Calibration files

In local space

Produced for optical measurement on 2013-02-13

  • /reg/neh/home1/dubrovin/LCLS/CSPad2x2Alignment/calib-cspad2x2-01-2013-02-13/<type>/0-end.data
  • /reg/neh/home1/dubrovin/LCLS/CSPad2x2Alignment/calib-cspad2x2-02-2013-02-13/<type>/0-end.data
  • /reg/neh/home1/dubrovin/LCLS/CSPad2x2Alignment/calib-cspad2x2-03-2013-02-13/<type>/0-end.data
  • /reg/neh/home1/dubrovin/LCLS/CSPad2x2Alignment/calib-cspad2x2-04-2013-02-13/<type>/0-end.data
  • /reg/neh/home1/dubrovin/LCLS/CSPad2x2Alignment/calib-cspad2x2-05-2013-02-13/<type>/0-end.data
  • /reg/neh/home1/dubrovin/LCLS/CSPad2x2Alignment/calib-cspad2x2-06-2013-02-13/<type>/0-end.data

Deployed in experimental DB

(tick) 2013-03-08
/reg/d/psdm/mec/mec73313/calib/CsPad2x2::CalibV1/

  • MecTargetChamber.0:Cspad2x2.1/<type>/0-end.data
  • MecTargetChamber.0:Cspad2x2.2/<type>/0-end.data
  • MecTargetChamber.0:Cspad2x2.3/<type>/0-end.data
  • MecTargetChamber.0:Cspad2x2.4/<type>/0-end.data
  • MecTargetChamber.0:Cspad2x2.5/<type>/0-end.data

(tick) 2013-06-21
/reg/d/psdm/xpp/xpptut13/calib/CsPad2x2::CalibV1/

  • XppGon.0:Cspad2x2.0/<type>/0-end.data is taken from calib-cspad2x2-06-2013-02-13/<type>
  • XppGon.0:Cspad2x2.1/<type>/0-end.data is taken from calib-cspad2x2-01-2013-02-13/<type>
    where <type> stands for tilt and center.

Known detectors

on 2013-12-17:

           CxiSc1.0:Cspad2x2.0
           CxiSc2.0:Cspad2x2.0
           CxiSc2.0:Cspad2x2.1
           CxiSc2.0:Cspad2x2.2
           CxiSc2.0:Cspad2x2.3
           CxiSc2.0:Cspad2x2.4
           CxiSc2.0:Cspad2x2.5
           CxiSc2.0:Cspad2x2.6
           CxiSc2.0:Cspad2x2.7
           MecEndstation.0:Cspad2x2.6
           MecTargetChamber.0:Cspad2x2.0
           MecTargetChamber.0:Cspad2x2.1
           MecTargetChamber.0:Cspad2x2.2
           MecTargetChamber.0:Cspad2x2.3
           MecTargetChamber.0:Cspad2x2.4
           MecTargetChamber.0:Cspad2x2.5
           XcsEndstation.0:Cspad2x2.0
           XcsEndstation.0:Cspad2x2.1
           XppGon.0:Cspad2x2.0
           XppGon.0:Cspad2x2.1
           XppGon.0:Cspad2x2.2
           XppGon.0:Cspad2x2.3

 

Software

Memory data model

In contrast to CSPAD which data array shape is (N, 185, 388), the CSPAD2x2 data array has a shape (185, 388, 2); the memory pointer increment by 1 swaps the 2x1 sensor. The (raw,column)=(0,0) is located in corners 4 and 8 of optical measurement scheme for two 2x1 sensors, respectively.

C++ version for psana

(tick) data types are implemented in the package pdscalibdata as CsPad2x2* modules:

  • CsPad2x2CenterV1
  • CsPad2x2TiltV1
  • CsPad2x2PedestalsV1
  • CsPad2x2PixelGainV1
  • CsPad2x2PixelStatusV1

(tick) Access methods are implemented in the package PSCalib in CSPad2x2CalibPars module.
Example of acess is in PSCalib/test/ex_cspad2x2_calib_pars.cpp.

(tick) Automated access to the cspad2x2 geometry parameters is implemented in packages:

  • Package CSPadPixCoords generates and returns the CSPad2x2 pixel coordinates, taking into account geometry alignment parameters, if available in the expected place under /reg/d/psdm/<instrument>/<experiment>/calib directory.
  • Module CSPadPixCoords::CSPad2x2ImageProducer produces CSPad2x2 image, accounting for correct geometry, if available.

(tick) Description of the psana module and example can be found in Psana Module Catalog Module CSPadPixCoords::CSPad2x2ImageProducer

Python modules for CSPad2x2 geometry

Python modules for CSPad2x2 geometry are available in the package PyCSPadImage. They provides an interface for getting
(tick) Calibration parameters from DB and local directory,
(tick) Pixel coordinates,
(tick) Image producer

References

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