Parts lists

While things are machined, why not buy the parts needed to put the assemblies together? Here are the lists of items needed for the individual elements. Metal purchases are not included in these lists and there's no guarantee that there's nothing missing!

Second (Miniature) Einzel Lens

All parts for the 2nd Einzel lens can be purchased from McMaster

Steerers

From UC Components you'll need some vented screws. Note that there's a space in some part numbers, and that the vented screws have different lengths (the shorter ones connect the standoffs with the steering plates, the longer ones connect the standoffs with the retaining rings).

The other items are available from McMaster.

Retractable cup

The retractable cup is designed for a standard 6 tee with a custom 6->2-3/4 zero length reducer (custom because you need two BNC feedthroughs on a bolt circle of 3.35), and for a manipulator on 2-3/4 flange with a travel length of 2 and a minimum retraction depth of around 3.5. I have used a MDC pneumatic manipulator.

From UC Components you'll need one single vented screw (the same type as for the static cup). Note that there's a space in the part number FA -406....

The other items are available from McMaster. Note that you need to make a channel in the flange button head screw for venting. The #4-40 screws are intended to keep the manipulator holder right-angle piece in place for welding it to the outer cup tube, and can be removed once the welding is done.

The cup design has been modified slightly in order to be able to fit a belleville washer under the central screw. The spring force should help locking the central screw in place when the cup is moved. Also, you will want to add a ceramic tube to the McMaster? item list (8746K11) for the repeller-wire.

Static cup

From UC Components you'll need some vented screws. Note that there's a space in the part number FA -406....

The other items are available from McMaster. Note that you need to make a channel in the threaded rod for venting.

Spherical Deflector

All parts for the spherical deflector can be purchased from McMaster

Third Einzel Lens

All parts for the 3rd Einzel lens can be purchased from McMaster

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