6.8 Metadata Extensions: 
6.8.1  
X-Ray Beam Source:  The type of equipment that produced the X-Ray beam:
SSRL X-Ray Synchrotron, 3 GeV, 500 mA current, 54-pole wiggler, beamline 6-2 front hutch
6.8.2
Tube Voltage:  Voltage applied to the X-Ray source expressed in 6.8.1
N/A
6.8.3
Tube Current:  Current applied to the X-Ray source expressed in 6.8.1
N/A

6.8.4
Source Bandwidth:  Bremstrahlung or Delta eV.
1.5 eV Si(111) @ 12200 eV

6.8.5
Source Intensity:  Reference Specimen or Photon Count

6.8.6
Scan Matrix Dimensions X by Y
In HDF Files, read in SMAK

6.8.7
Beam Dimension
100 micron diameter tungsten pinhole

6.8.8
Beam Scan Spacing
120 microns

6.8.9
Scanning Mode: Continuous, one directional


6.8.10
Scanning Speed:
120 micron/ 8 ms

6.8.10.1
Pixel Acquisition Time:  The dwell time of the X-Ray Beam in milliseconds
Uscan data log file 

6.8.10.2
Time for Scan:  
Length of time for scan in hours and minutes
Data log file around 2000x1300 points

6.8.11
Beam Distance from Specimen:
~ 40 mm.

6.8.12
Beam Angle to Specimen:  The angle of the object to the beam in degrees going counterclockwise starting at the beam looking down, or “right hand rule”thumb up.
45 degrees
6.8.13
Lens ENTRY: Polycapillary or Monochromator
Si 111 for both 10-2 and 6-2

6.8.14
Primary Beam Filter:  Filter material or type between the X-Ray Beam and the object.
6-2 None
10-2  Filter No. 1, then no filter at 023r-030v 3/11 1355

6.8.15
Detectors:
Number of XRF detectors.

6-2 2  
Front: Vortex ME4-300 running 3 elements
Back: Vortex 60EX acting as element 4
Hgf5 data Channel 0 is 3 element, Channel 1 is 1 element
10-2 1 Vortex 90EX
Edwards et al, J. Synchrotron Rad, 25, 1565-73 (2018), DOI: 10.1107/S1600577518010202

6.8.15.1
Detector Identification:  Name of the XRF detector in the collection system.
Edwards et al, J. Synchrotron Rad, 25, 1565-73 (2018), DOI: 10.1107/S1600577518010202

6.8.15.2
Longitude:  The angle of the detector horizontally around the object in degrees going counterclockwise starting at the beam looking down, or “right hand rule” thumb up.
Front: 90 degrees to the incident beam direction

6.8.15.3
Latitude:  The angle of the detector vertically around the object in degrees going 
down in a clockwise direction starting at the beam looking from the left of the beam, or 
“right hand rule” thumb toward X-Ray source.
0  (Horizontal)

6.8.15.4
Distance:  Distance from the specimen to the detector.
10-2 2.5 cm with collimator and single 25 micron foil filter
6-2 6.5 cm, no filter 

6.8.15.5
Detector Make:  Make of the detector.
See Edwards et al, above

6.8.15.6
Detector Model:  Model of the detector.
See Edwards et al, above

6.8.15.7
Detector Bias Voltage:
See Edwards et al, above

6.8.15.8
Amp Time Constant:  milliseconds
See Edwards et al, above

6.8.15.9
Make of Counting Electronics:
Detector 1: 12.5 micron Beryllium, see Edwards et al JSR 2019
6.8.15.10
Model of Counting Electronics:  
Detector 1: 12.5 micron Beryllium, see Edwards et al JSR 2019

6.8.15.11
Primary Detector Window:  Type of material and thickness in millimeters of the 
detector window.
Detector 1: 12.5 micron Beryllium, see Edwards et al JSR 2019

6.8.15.12
Number of Detector Elements:  Number of detector elements behind the window.
6-2 Detector 1: 3 Elements
6-2 Back and 10-2:  1 Element

6.8.15.13
Intermediate Windows:  Number of intermediate windows between primary detector 
and object, and type of material and thickness of windows.
10-2 foil single sheet aluminum foil 25 microns

6.8.15.14
Intermediate Atmosphere:  Intermediate atmosphere between detector and object
Air

6.8.16
Chamber Atmosphere:  The atmosphere in the chamber, either “Air” or a given gas.
Air
6.8.17
Chamber Temperature:
Approximately 77F

6.8.18 
Chamber Humidity:
Approximately 32% RH


6.8.19
Post Processing Module:

6.8.19.1
Second Post Processing Module:

6.8.20
Ion Chamber

6.8.20.1
Ion Chamber Length:  Length of the ion chamber in centimeters
I1 30 cm

6.8.20.2
Type of Gas:  Sensing medium in the ion chamber.
I0 Helium
I1 Air

6.8.21
Gain:
I0= 0.19 Gain 1x10-7 

6.8.22
Voltage to Frequency Ratio:
105


6.8.23
Channels:  Number of channels in the ASCII File:
NA

6.8.23.1 Channel Number:  The identification number assigned to a given channel
NA
6.8.23.2
  Detector:  The detector output that is assigned to a given channel
I0 Strm
I1 Strm



6.8.23.3
  Element:  The natural element collected in a given channel
NA
6.8.23.4
 Windows:
NA