SIMS Map of Sample 591 Crater 2

Impact feature information

Experiment A0201
Surface ID 591 (preflight and postflight images)
Crater # 2
LDEF Location: Bay E Row 6
Coordinates [mm] x 12.7 +- 0.0 y 2.3 +- 0.0
JSC ID 591
Surface Description: S1003 Aluminum Surface
Feature Description: hypervelocity impact, crater with lips
Origin Description was not available
central crater diameter: 17 micrometers
Photos available:
- SEM
Analyses performed:
- EDS
- SIMS images
Notes: bargraph and profile file lost, primary beam current 5nA for 52Cr, do not ratio this mass!

Feature Image

SIMS Images

Below are the SIMS images of this feature. A thumbnail image overview is available, too. The analysis was performed on 12-02-1993. The following mass numbers were imaged:
12, 23, 24, 30, 39, 40, 48, 52, 56, 56, 58, 63, 64, 109, 24, 56, 56

Analytical Conditions:

These parameters directly affect spectrometer signal intensities.
Primary beam:

Gas and polarity: O+
Primary Acceleration Voltage: 15 kV
Secondary Acceleration Voltage: +4.5 kV
Primary beam current: ? nA
Raster size: ? (range ?, pot setting 10)

Secondary beam:

Polarity: +
Transfer Optics Setting: 150 micrometers
Energy slit setting: 10
Energy slit translation: ?
Entrance slit setting: 1.000
Exit slit setting: 1.000
Contrast Diaphragm: 3 (150 micrometers)
Field Aperture: 2 (750 micrometers)
Imaged Area: 60
Image Pixel Size: 256 x 256 (aspect ratio correction: multiply y by 0.83)
Channel plate ID: 3

Image 1, C (Mass 12)

signal intensity scale: 0 -> 134; scale bars are 50 micrometers

--------------------------------------------------------------------------------
					Resolution
Element Interferents			  (m/Dm)	Comments
--------------------------------------------------------------------------------
12C	24Mg2+,*11BH			   <1604	resolved, non-coincident
							with Mg distribution
--------------------------------------------------------------------------------
NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res
      Mass Spectra of a particular mass on the Standard.

Image Conditions

These parameters directly affect image intensities.

Number of frames taken: 500
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 28328
max count: 134
species classification positive

Image 2, Na (Mass 23)
signal intensity scale: 0 -> 420; scale bars are 50 micrometers

-------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 23Na 30SiO2+ 3.10 -4222 not resolvable, low abundance. Na distri- bution had to be non-co- incident with high con- centration of the Si distribution for a positive ID. Looked for NaH (not resolvable from 12C2) and/or NaO (not resolvable from 27AlC) in samples with high Si. *46Ti2+,46Ca2+ <1776 resolved -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 5
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 712689
max count: 420
species classification positive
sensitivity factor for material implanted in Si matrix: 139.0000

Image 3, Mg (Mass 24)
signal intensity scale: 0 -> 300; scale bars are 50 micrometers

-------------------------------------------------------------------------------- Resolution Element Interferents (m/Dm) Comments -------------------------------------------------------------------------------- 24Mg *48Ti2+,48Ca2+,*23NaH+,12C2 <2731 resolved -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 5
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 318806
max count: 300
species classification positive
sensitivity factor for material implanted in Si matrix: 18.0000

Image 4, Si (Mass 30)
signal intensity scale: 0 -> 340; scale bars are 50 micrometers

-------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 30Si 60Ni2+ 26.2 -3577 resolvable with diffi- culty, identified Si line in standard *29SiH,12CH2O,12C2H6 <2841 resolved -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 500
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 482953
max count: 340
species classification positive

Image 5, K (Mass 39)
signal intensity scale: 0 -> 529; scale bars are 50 micrometers

-------------------------------------------------------------------------------- Resolution Element Interferents (m/Dm) Comments -------------------------------------------------------------------------------- 39K *27AlC,23NaO,12C3H3 <2190 resolved -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 30
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 889177
max count: 529
species classification positive
sensitivity factor for material implanted in Si matrix: 125.0000

Image 6, Ca (Mass 40)
signal intensity scale: 0 -> 437; scale bars are 50 micrometers

-------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 40Ca 40K 0.012 +28,000 not resolvable, very low abundance. 39KH 93.1 +4470 not resolvable, used 44Ca (SiO resolvable interference) or non- coinci-dence with K dis- tribution *28SiC,*24MgO,27Al13C, <2993 resolved 12C2O,12C3H4 -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 10
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 909869
max count: 437
species classification positive
sensitivity factor for material implanted in Si matrix: 38.5000

Image 7, Ti (Mass 48)
signal intensity scale: 0 -> 319; scale bars are 50 micrometers

-------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 48Ti 96Mo2+ 16.5 +11,000 not resolvable, presence unlikely 48Ca 0.185 +10,000 not resolvable, very low abundance, Ti must be non-coincident with Ca, looked at 47Ti line *47TiH 7.29 +4123 appears as a small peak on the right slope of the 48Ti peak *24Mg2+,48O3,24MgC2,12C4 <2167 resolved -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 50
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 180781
max count: 319
species classification positive
sensitivity factor for material implanted in Si matrix: 13.9000

Image 8, Cr (Mass 52)
signal intensity scale: 0 -> 467; scale bars are 50 micrometers

-------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 52Cr 28Si24Mg,*40CaC,26Mg2, <2420 resolved 25MgAl,40KC,28SiC2 -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 20
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 923515
max count: 467
species classification positive
sensitivity factor for material implanted in Si matrix: 7.6900

Image 9, Fe (Mass 56)
signal intensity scale: 0 -> 502; scale bars are 50 micrometers

NOTE: 28Si2 and 40CaO are not resolvable among themselves and appear as one peak to the right of the 56Fe peak. -------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 56Fe --AND-- 56Si2 55MnH 99.9 +5118 not resolvable, unlikely to be present without Fe *28Si2,44CaC,*40CaO,29SiAl, <2956 resolved 40KO,32SC2,24MgO2,C4H6 -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 30
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 695267
max count: 502
species classification positive
sensitivity factor for material implanted in Si matrix: 1.8500

Image 10, Si2 (Mass 56)
signal intensity scale: 0 -> 323; scale bars are 50 micrometers

NOTE: 28Si2 and 40CaO are not resolvable among themselves and appear as one peak to the right of the 56Fe peak. -------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 56Fe --AND-- 56Si2 55MnH 99.9 +5118 not resolvable, unlikely to be present without Fe *28Si2,44CaC,*40CaO,29SiAl, <2956 resolved 40KO,32SC2,24MgO2,C4H6 -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 100
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 590179
max count: 323
species classification positive
sensitivity factor for material implanted in Si matrix: 1.0000

Image 11, Mass 58 (unidentified)
signal intensity scale: 0 -> 175; scale bars are 50 micrometers

NOTE: THIS IMAGE IS MOST LIKELY A COMBINATION OF 58Si2, Si2H, Si2H2, FeH, and (only if present) 58Ni. NOTE: Ni MUST be NON-COINCIDENT with Fe AND Si (unlikely if it is present) for POSITIVE, QUANTITATIVE IDENTIFICATION. It should be possible to identify Ni using measured responses for non- resolvable interferences and their parent elemental isotopes -------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 58Ni 58Fe 0.33 -28,000 not resolvable, very low (68.3%) abundance 57FeH 2.19 +7352 not resolvable, low abundance 58Si2 5.92 +3777 not resolvable -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 500
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 61708
max count: 175
species not classified

Image 12, Cu (Mass 63)
signal intensity scale: 0 -> 168; scale bars are 50 micrometers

-------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 63Cu 62NiH 3.66 +9578 not resolvable, Cu must be non-co-incident with Ni for positive identifi- cation * 47TiO 7.26 +3684 not resolvable, Cu must be non-coincident with Ti for positive identifi- cation 39KC2,27AlC3,C5H3 <1844 resolved -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 500
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 112061
max count: 168
species classification positive

Image 13, Mass 64 (TiO(+Zn?))
signal intensity scale: 0 -> 432; scale bars are 50 micrometers

NOTE: MOST MASS 64 IMAGES HAVE A HIGH CONTRIBUTION FROM TiO -------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 64Zn 64Ni 1.08 -54,000 not resolvable, Ni must have non-coincident distribution *63CuH 69.1 +7730 not resolvable, Cu must have non-coincident distribution 52CrC 82.8 +5623 not resolvable, Cr must have non-coincident distribution *48TiO 73.8 +4660 not resolvable, Ti must have non-coincident distribution. Very likely to be present if Ti abundant. 32S2 90.3 +4262 not resolvable, S must have non-coincident distribution *48CaO 0.185 +3493 resolvable with diffi- culty, very low abun- dance *24Mg40Ca 76.3 +3408 resolvable with diffi- culty, Zn must have non- coincident distribution with respect to both Mg and Ca for posi- tive identification SO2,40CaC2,40KC2,24Mg2O, <1951 resolved 28SiC3,64O4,C4O,C5H4 -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 500
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 471565
max count: 432
species classification probable

Image 14, Mass 109 (unidentified)
signal intensity scale: 0 -> 128; scale bars are 50 micrometers

Non-standard Mass

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 1000
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 18276
max count: 128
species not classified

Image 15, Mg (Mass 24)
signal intensity scale: 0 -> 299; scale bars are 50 micrometers

-------------------------------------------------------------------------------- Resolution Element Interferents (m/Dm) Comments -------------------------------------------------------------------------------- 24Mg *48Ti2+,48Ca2+,*23NaH+,12C2 <2731 resolved -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 5
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 280111
max count: 299
species classification positive
sensitivity factor for material implanted in Si matrix: 18.0000

Image 16, Fe (Mass 56)
signal intensity scale: 0 -> 425; scale bars are 50 micrometers

NOTE: 28Si2 and 40CaO are not resolvable among themselves and appear as one peak to the right of the 56Fe peak. -------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 56Fe --AND-- 56Si2 55MnH 99.9 +5118 not resolvable, unlikely to be present without Fe *28Si2,44CaC,*40CaO,29SiAl, <2956 resolved 40KO,32SC2,24MgO2,C4H6 -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 30
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 441015
max count: 425
species classification positive
sensitivity factor for material implanted in Si matrix: 1.8500

Image 17, Si2 (Mass 56)
signal intensity scale: 0 -> 310; scale bars are 50 micrometers

NOTE: 28Si2 and 40CaO are not resolvable among themselves and appear as one peak to the right of the 56Fe peak. -------------------------------------------------------------------------------- % isotopic Resolution Element Interferents abundance (m/Dm) Comments -------------------------------------------------------------------------------- 56Fe --AND-- 56Si2 55MnH 99.9 +5118 not resolvable, unlikely to be present without Fe *28Si2,44CaC,*40CaO,29SiAl, <2956 resolved 40KO,32SC2,24MgO2,C4H6 -------------------------------------------------------------------------------- NOTE: An asterisk (*) means that these species were in fact observed on Hi-Res Mass Spectra of a particular mass on the Standard.

Image Conditions
These parameters directly affect image intensities.

Number of frames taken: 100
Channel Plate Gain setting: 2.5
Channel Plate ID: 3
total count rate: 356127
max count: 310
species classification positive
sensitivity factor for material implanted in Si matrix: 1.0000

Mass Ratio Plot
The image displayed below shows the area (90,74 to 138,157) and the image (number 7, mass 48) that was used to compute mass ratios.

Only identifiable masses with the same channel plate gain value and ID may be displayed. The plot shows data points with Relative Sensitivity Factors for both material implanted in a silicon matrix and material implanted in a lunar analog glass matrix applied to them. When comparing the values of the data file available for this feature with the data of another feature, all instrument and image acquisition parameters must be the same to make any quantitative comparison of these two features. The values in the data file are shift-corrected pixel counts summed over the entire area inside the box and divided by the box area. 48Ti signals are corrected for 48Ca (0.185abundance, not resolvable). Please refer to the element classification information for the interpretation of this plot.

retrieve SIMS data file get C source code
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Klaus G. Paul, 7-12-1994