Difference between revisions of "SEM EDS"
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** [[:microscope:sem:edax|EDAX]] | ** [[:microscope:sem:edax|EDAX]] | ||
| − | ** [http://www.edax.com/ Website | + | ** [http://www.edax.com/ Website]] |
** [[:microscope:sem:oxford|Oxford Instruments]] | ** [[:microscope:sem:oxford|Oxford Instruments]] | ||
| − | ** [http://www.oxford-instruments.com/ Website | + | ** [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]] | ||
| − | ** [http://www.bruker.com/ Website | + | ** [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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Styles | Styles | ||
| − | + | * Si-Li | |
| − | + | * Silicon Drift Detector (SDD) | |
== Si-Li == | == Si-Li == | ||
| Line 65: | Line 65: | ||
made of: | made of: | ||
| − | ** Polymide [http://www.google.com/patents/US20120087476 ref | + | ** Polymide [http://www.google.com/patents/US20120087476 ref]] |
| − | ** "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 | + | ** "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 == | ||
| Line 74: | Line 74: | ||
= Gamma Spectacular = | = Gamma Spectacular = | ||
| − | [ | + | [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? | ||
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{| class="wikitable sortable" border=1 | {| class="wikitable sortable" border=1 | ||
| − | !Image !!Vendor !!Model !!Year !!Features !!List price !!Ask price !!Manual !!Schem !!SW !!Notes | + | !Image !!Vendor !!Model !!Year !!Features !!List price !!Ask price !!Manual !!Schem !!SW !!Notes |
|- | |- | ||
| − | | || EDAX || Genesis Spectrum || 2006 || || || || [http: | + | | || EDAX || Genesis Spectrum || 2006 || || || || [http://siliconpr0n.org/media/edax/genesis/GenEDS.pdf Yes] || || [http://siliconpr0n.org/media/edax/genesis/ Yes] || |
|- | |- | ||
|} | |} | ||
| Line 90: | Line 90: | ||
= References = | = References = | ||
| − | ** [ | + | ** [http://www.charfac.umn.edu/instruments/eds_on_sem_primer.pdf] |
** Has a nice CAD drawing explaining the components of real EDS detectors | ** Has a nice CAD drawing explaining the components of real EDS detectors | ||
| − | ** [ | + | ** [http://epmalab.uoregon.edu/pdfs/Electron Beam MicroAnalysis-Geol_619-8.ppt] |
| − | |||
| − | |||
Latest revision as of 05:56, 25 December 2018
"Energy-dispersive X-ray spectroscopy (EDS, EDX, or XEDS)"
List of EDS manufacturers:
- EDAX
- Website]
- Oxford Instruments
- Website]
- Noran Instruments (now Thermo Scientific)
- Princeton Gamma-Tech (PGT, now Thermo Scientific)
- Bruker
- Website]
- Evex (Kevex?)
- "To enjoy this site you'll need to update your Flash Player. It's easy, painless and will take just a moment… "
- haha never buying your products
- Link Analytical
- e2v Sirius
Typical systme:
- Thin window (Be, C, B)
- SiLi crystal
- FET pre-amplifier
- Vacuum
- Cold finger
- Pre-amplifier
- Amplifier
- MDA electronics (“multi channel analyzer”)
Contents
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:
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 | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| EDAX | Genesis Spectrum | 2006 | Yes | Yes |
References
- [2]
- Has a nice CAD drawing explaining the components of real EDS detectors
- Beam MicroAnalysis-Geol_619-8.ppt
