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Table of Contents
JM purchased one of these, trying to find more info on it. Should come with schematics
Filament
Trying to find replacement filaments. Takes the ISI three prong type
Prices as of 04/21/2014
| Vendor | Item # | Description | Price/pack | Qty/pack | Qty/each | Notes |
|---|---|---|---|---|---|---|
| Ted Pella | 1426 | ISI / ABT / Topcon 3-pin | 425.00 | 10 | 42.50 | |
| Electron Microscopy Sciences | 81038 | STANDARD LOOP FILAMENTS for: ISI Instruments, ABT, Topcon New Filament, 3-prong | 416.00 | 10 | 41.60 | |
| Electron Microscopy Sciences | 81038-R | STANDARD LOOP FILAMENTS for: ISI Instruments, ABT, Topcon Rebuilt Filament, 3-prong | 1 | 32.00 | ||
| SPI Supplies | 5232N-BA | Topcon/ISI 3-pin | 525.49 | 10 | 52.55 | |
| SPI Supplies | 5232RB-AB | Topcon/ISI 3-pin (rebuilt) | 1 | 41.57 | ||
| EB Sciences | ISIE | Standard loop, 3 Prong | 405.00 | 10 | 40.50 | |
| EB Sciences | ISIE | AR loop, 3 Prong | 455.00 | 10 | 45.50 | |
| Fisher Scientific | 50-290-87 | NEW FILAMENT 3-PRONG | 509.60 | 10 | 50.96 | |
| Soquelec | A20135 | ISI (2-prong, new) | 1 | 68.10 | NOTE: 2 prong for comparison | |
| Soquelec | A20140 | ISI (2-prong, rebuilt) | 1 | 39.00 | NOTE: 2 prong for comparison | |
| ME Taylor | F-3 | Topcon/ISI 3-pin style Filaments - Package of 10 | 275.00 | 10 | 27.50 |
EB Sciences
Has several filament types
Type AR
“The Energy Beam Sciences exclusive AR tip represents the state of art in filament technology. This special loop was developed for applications which demand the ultimate in mechanical stability and operating life. It is particularly recommended for use in multi-user environments and teaching laboratories. Its etched taper loop configuration and unique tip geometry enhance contrast and brightness, even at low kV. We can provide the AR loop mounted on any type of filament base. Whatever your application, you should see enhanced performance with the AR loop, when compared with the standard loop filament supplied by the EM equipment manufacturer.”
Standard Loop
“Energy Beam Sciences Standard Loop Tungsten Filaments are designed to conform to Original Equipment Manufacturers' specifications across the industry. Our filaments are individually manufactured with careful attention to detail, maintaining their precise tip geometry and using superior assembly techniques and stringent quality control for consistency and dependability in even the most demanding applications. At Energy Beam Sciences, we offer cost effective, reliable solutions for these and all of your EM consumable needs. Please call our e-Beam product specialist today to find out more about our quality products!”
JM electron gun
Original unit that SEM came with
Assembly:
Base it plugs into:
Taking off top retainer:
Removing the Wehnelt:
Note that the filament is slightly twisted to form the tip. Also, its burned out
Wehnelt bottom:
Side of the filament assembly
Filament tip:
Everything together:
lapointe2
http://members.tm.net/lapointe2/scanning_electron_microscope.html
Great resource on this model. Unfortunately, links to pages are hidden throughout the text so I've tried to index it a bit better. I also have mirrored the site in case it disappears:
-
- Like a user manual: read it
-
- DIY chiller
These are less about the SEM and more about his particular logistics:
-
- Hooking up his roughing pump
-
- Hooking up his electrical lines
Cleaning
Wenol metal polish recommended for cleaning. MSDS lists
- Ammonia Solution 25%: 1-5%
- Kerosene 200-230: 10-20%
- White Spirit 150/200N: 10-20%
- Aluminum oxide (pigments): 25-35%
- Coco fatty acid diethanolamide: 5-15%
- Water: 35%
https://www.tedpella.com/material_html/polish.htm#Anchor-47857
- “Wenol® is widely used as cleaner and polish for electron microscope applications, ion beam systems, vacuum coating systems and general lab applications. Wenol® has been originally formulated for use on hard metal surfaces such as stainless steel. It can be used to clean and polish hard metal parts for vacuum systems. The carrier fluid dissolves in most hydrocarbons and is easily removed. Wenol® is petroleum based and does not contain silicones. It is not recommended for use on soft metal such as aluminum.”
Ted Pella also has Unipol…not sure when to use one vs the other. Generic Wenol?
- Aluminium oxide: 20-40
- Ammonia solution: 0.1-5
- Destillates (petroleum), hydrotreated light: 20-40
- Naphtha (petroleum), hydrotreated light: 2.5-10
read somewhere 100ml ~= 3.4oz Wenol
o-rings
Drawings in this section are from Lapointe's website
may consider replacing o-rings as the vacuum is sub-par. By the time I disassemble everything might as well replace them
“o-rings are labeled with their aerospace standard AS568A size”
High vacuum assembly
Abbreviations:
- ID: inner diameter
- OD: outer diameter
- CS: cross section
What is difference between nominal and actual size?
| AS568A size | ID | OD | CS | Qty |
|---|---|---|---|---|
| 011 | 1 | |||
| 013 | 1 | |||
| 118 | 2 | |||
| 128 | 1 | |||
| 141 | 1 | |||
| 214 | 1 | |||
| 215 | 2 | |||
| 216 | 1 | |||
| 220 | 2 | |||
| 221 | 1 | |||
| 222 | 2 | |||
| 226 | 1 | |||
| 233 | 1 |
Valve assembly
| AS568A size | Qty |
|---|---|
| 006 | 1 |
| 121 | 2 |
| 123 | 1 |
uccs.edu PES415
Has a sort of instruction manual: http://www.uccs.edu/~tchriste/courses/PES415/SEM.pdf
