Difference between revisions of "SEM EDS"

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**  [[:microscope:sem:edax|EDAX]]
 
**  [[:microscope:sem:edax|EDAX]]
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** [http://www.edax.com/ Website]]]
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** [http://www.edax.com/ Website]]
 
**  [[:microscope:sem:oxford|Oxford Instruments]]
 
**  [[:microscope:sem:oxford|Oxford Instruments]]
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** [http://www.oxford-instruments.com/ Website]]]
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** [http://www.oxford-instruments.com/ Website]]
 
** Noran Instruments (now Thermo Scientific)
 
** Noran Instruments (now Thermo Scientific)
 
** [[:microscope:sem:pgt|Princeton Gamma-Tech (PGT, now Thermo Scientific)]]
 
** [[:microscope:sem:pgt|Princeton Gamma-Tech (PGT, now Thermo Scientific)]]
 
**  [[:microscope:sem:bruker|Bruker]]
 
**  [[:microscope:sem:bruker|Bruker]]
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** [http://www.bruker.com/ Website]]]
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** [http://www.bruker.com/ Website]]
 
** Evex (Kevex?)
 
** Evex (Kevex?)
 
** "To enjoy this site you'll need to update your Flash Player. It's easy, painless and will take just a moment… "
 
** "To enjoy this site you'll need to update your Flash Player. It's easy, painless and will take just a moment… "
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made of:
 
made of:
  
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** Polymide [http://www.google.com/patents/US20120087476 ref]]]
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** Polymide [http://www.google.com/patents/US20120087476 ref]]
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** "poly-vinyl formal (FORMVAR), butvar, parylene, kevlar, polypropylene, lexan or polyimide" [https://www.google.com/patents/US20080296479?dq=moxtek+x-ray+window&hl=en&sa=X&ei=nqh5U6ajCdjboAS8tILgBA&ved=0CEUQ6AEwAg ref]]]
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** "poly-vinyl formal (FORMVAR), butvar, parylene, kevlar, polypropylene, lexan or polyimide" [https://www.google.com/patents/US20080296479?dq=moxtek+x-ray+window&hl=en&sa=X&ei=nqh5U6ajCdjboAS8tILgBA&ved=0CEUQ6AEwAg ref]]
  
 
== Windowless ==
 
== Windowless ==
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= Gamma Spectacular =
 
= Gamma Spectacular =
  
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[http:''beeresearch.com.au/ http://beeresearch.com.au/]]]
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[http://beeresearch.com.au/]]
  
 
How hard would it be to use this as EDS controller?
 
How hard would it be to use this as EDS controller?

Revision as of 05:50, 25 December 2018


"Energy-dispersive X-ray spectroscopy (EDS, EDX, or XEDS)"

List of EDS manufacturers:

Typical systme:

    • Thin window (Be, C, B)
    • SiLi crystal
    • FET pre-amplifier
    • Vacuum
    • Cold finger
    • Pre-amplifier
    • Amplifier
    • MDA electronics (“multi channel analyzer”)

Detector

Styles

    • Si-Li
    • Silicon Drift Detector (SDD)

Si-Li

Operates at LN2 temps. If operated at room temp it will be destroyed

SDD

"SDD detectors operate at a few tens of degrees below zero"

Window

Styles [epmalab]:

    • Be foil
    • Supported window
    • Windowless

Be foil

"The most common EDS detector window has been made of Be foil ~7.6 um (0.3 mil) thick. It allows good transmission of X-rays above ~ 1 keV. It is strong enough to withstand venting to atmospheric pressure, and opaque to optical photons." [epmalab]

Supported window

"For transmission of light element X-rays (<1 keV), windows ~0.25 um thick of BN, SiN, diamond or polymer are used. They must use supporting grids to withstand pressure differentials; the grid (e.g., Si or Ni) takes up about 15% of the area, but thin enough that low energy X-rays pass through." [epmalab]

Ultra Thin Window (UTW)

made of:

    • Polymide ref]
    • "poly-vinyl formal (FORMVAR), butvar, parylene, kevlar, polypropylene, lexan or polyimide" ref]

Windowless

"no film, and there is a turret that allows swapping with a Be window. Difficult to use as oil or ice can coat the detector surface" [epmalab]

Gamma Spectacular

[1]]

How hard would it be to use this as EDS controller?

Model comparison

Image Vendor Model Year Features List price Ask price Manual Schem SW
EDAX Genesis Spectrum 2006 [http:siliconpr0n.org/media/edax/genesis/GenEDS.pdf Yes]] [[http://siliconpr0n.org/media/edax/genesis/ ]


References

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