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Public Images

 

The following images are released to the public under Creative Commons Attribution-ShareAlike 3.0 Licence

 

 

 

TITLE: Basic ESEM gas pressure stages

DATE: May, 2008

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, differential pumping, beam transfer, specimen transfer, pressure limiting aperture

DESCRIPTION: Basic ESEM gas pressure stages with specimen chamber at pressure p0, stage 1 at p1, stage 2 at p2 , pressure limiting apertures PLA1 and PLA2, specimen transfer chamber (tr-ch), pump manifold, gas supply and electron beam transfer from gun to specimen

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Isodensity contours of gas through aperture

DATE: May, 2008

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, pressure limiting aperture, PLA, gas flow, contours, differential pumping

DESCRIPTION: Isodensity contours at the values indicated on color bar for argon gas flow through  0.5 mm aperture ( PLA1) from specimen chamber at pressure p0=1000 Pa and room temperature 293 degrees Kelvin, into low pressure region of stage 1 held at pressure p1. Electron beam travels from vacuum region above along the axis against the supersonic gas jet formed< /FONT>

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: ESEM gaseous detection device (GDD) - principle

DATE: May, 2008

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, gaseous detection device, ESD, GSED, ionization, diffusion, avalanche

DESCRIPTION: Principle of gaseous detection device (GDD) used for detection and amplification of signals in ESEM.  Secondary electrons SE from specimen are acted upon by electric field E between electrodes (cathode and anode) biased with voltage V.  Electrons move towards the anode multiplying in an avalanche by collisions with gas, at high bias, while they diffuse laterally by thermal collisions

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Efficiency characteristics of gaseous detection device in ESEM

DATE: May, 2008

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, detector efficiency, gaseous detection devise, GDD, ESD, GSED

DESCRIPTION: Efficiency characteristics of gaseous detection device used in ESEM with parallel electrodes at distance d, nitrogen gas at pressure p and fixed pd= 1 Pa-m. Curves give the fraction of secondary electrons within radius r of the anode biased at the corresponding voltage shown, versus r/d.< /FONT>

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Optimum BSE detectors in ESEM

DATE: May, 2008

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, optimum BSE detectors, backscattered electrons, scintillating detectors

DESCRIPTION: Optimum geometry backscattered electron detectors in ESEM.  Clear plastic light pipes coated with scintillating material, abutting the PLA1 aperture for maximum collection efficiency, while gas flows from specimen chamber at pressure p0, to intermediate stage out at p1. Electron beam passes through vacuum at p2 above final lens and PLA2 before it strikes the specimen

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Sydney ESEM prototype 

DATE: May, 2008

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, prototype, optimum BSE detectors, scintillating detectors, GDD, gaseous detection, differential pumping, transfer chamber 

DESCRIPTION: Original ESEM prototype in Sydney:  Electron optics column with differential pumping stage 1 and stage 2, specimen chamber, transfer chamber, two symmetrical backscattered electron detectors, gaseous detection device (GDD) electronics with multiple electrode wiring.  

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Wool fibers in ESEM 

DATE: 1986

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, prototype, optimum BSE detectors, scintillating detectors, GDD, gaseous detection, color imaging, wool

DESCRIPTION: Wool fibers imaged in an ESEM by the use of two (A and B) symmetrical plastic scintillating backscattered electron detectors: Color was obtained by superimposing three images, namely, A+B, A-B and B-A through red, green and blue filters, resulting in sharp topographic contrast with illumination from the two detector directions.  Field width=200 microns, 10 kV, 50 pA, 100 Pa pressure. 

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Mineral in ESEM 

DATE: 1986

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, prototype, optimum BSE detectors, scintillating detectors, GDD, gaseous detection, mineral, color imaging 

DESCRIPTION: Aluminium/iron/silicon mineral with other impurities and surface contaminants imaged in an ESEM by the use of two (A and B) symmetrical plastic scintillating backscattered electron detectors and the gaseous detector device (GDD): Color was obtained by superimposing three images, namely, A+B, A-B and GDD through red, green and blue filters, resulting in sharp topographic and material contrast.  Field width=93 microns, 10 kV, 200 pA, 10 Pa pressure.

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Salt hydration in ESEM 

DATE: 1986

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, prototype, optimum BSE detectors, scintillating detectors, GDD, gaseous detection, salt hydration, color imaging 

DESCRIPTION: Hydration of NaCl salt crystals on Teflon, as water vapor pressure rises, at room temperature, in an ESEM by the use of two symmetrical plastic scintillating backscattered electron detectors.  Field width=300 microns, 10 kV.

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

 

TITLE: Gas jet in ESEM 

DATE: 1987

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, prototype, optimum BSE detectors, scintillating detectors, gas jet, gaseous detecion device, GDD 

DESCRIPTION: ir gas jet through 100 micron aperture into ESEM chamber held at 200 Pa, image taken with gaseousdetection device, 15 kV.

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Resolution in ESEM 

DATE: 1989

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, prototype, optimum BSE detectors, scintillating detectors, resolution

DESCRIPTION: Resolution test specimen of gold particles on carbon in ESEM, at high magnification. Field width= 1.2 microns.

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Drying greasy wool fibers 

DATE: 1985

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, prototype, optimum BSE detectors, scintillating detectors, Drying greasy wool fibers 

DESCRIPTION: Greasy wool fibers going from wet to dry in ESEM. Field width= 270microns, BSE, 10 kV.

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

 

 

TITLE: Live Leptospermum flavesces stem

DATE: 1980

CREATOR: Gerry Danilatos

SOURCE: ESEM Research, http://www.danilatos.com

KEY WORDS: ESEM, prototype, optimum BSE detectors, scintillating detectors,  Leptospermum flavesces

DESCRIPTION: Live Leptospermum flavesces stem cells with water film on left, at room temperature: ESEM, BSE, 15 kV, 1870Pa of water vapor

LICENCE: Creative Commons Attribution-ShareAlike 3.0

 

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