R-script ion probe data analysis

Joe Kunkel and Sunyoung Jang

UMass Amherst

ASET data input to R-scripts

• ASET software was used to collect static pH calibration data, dynamic uV-difference data and grid scan data relative to an artificial proton diffusion source.

• The data were exported to comma delimited text files.

• R-scripts were written to access the data.

1 Calibration Curves

• June 27

• June 29

July 6 Callibration Curve

July 6, Expor001.R R-script

July 6, Expor002.R R-script

July 10, Callibration Curve

July 10, Probe Image 640x480

July 10, Expor005.R R-script

July 10, Expor006.R R-script

July 12, 800 x 600 probe image

July 11, Callibration Curve

July 12, Expor014.R R-script

July 12, Expor015.R R-script

END• Data sets:

June 29• SUN001.TXT - an x-egress.

July 6• EXPOR000.TXT - an x-egress.• EXPOR001.TXT - grid scan 1• EXPOR002.TXT - grid scan 2

July 10• EXPOR003.TXT - an x-egress. (= EXPOR004.TXT )• EXPOR004.TXT - grid scan 3 974 min• EXPOR005.TXT - grid scan 4 993 min• EXPOR006.TXT - grid scan 5 1010 min

July 11• EXPOR007.TXT - grid scan 6 682 min (= EXPOR008.TXT )• EXPOR009.TXT - grid scan 7 698 min• EXPOR010.TXT - grid scan 8 782 min• EXPOR011.TXT - grid scan 9 799 min• EXPOR012.TXT - grid scan 10 843 min• EXPOR013.TXT - grid scan 11 859 min

July 12• EXPOR016.TXT - vpo callibration record. • EXPOR014.TXT - grid scan 12 717 min• EXPOR015.TXT - grid scan 13 733 min