Mark 2 Ion Hemisphere





4" diameter hemisphere with 0.75" diameter inner grid. New reactor will present more optimal 1:5 grid ratio.


ISO-100 Flange:

4" hemisphere will be machined to fit five 2.75" CF half nipples and welded to ISO flange. O-ring will seal both hemispheres together.



Hemisphere face sanded down to present even face to fit flange.



Each half of the reactor core will consist of 1 NW40 weld stub, one ISO-100 flange, and a 4" diameter hemisphere.


NW-40 Weld Stub:

NW40 weld stubs will be used to connect the reactor core to the high voltage feedthrough and vacuum hub.


Index Hole:

An index hole is drilled on the hemispheres axis as a reference point for machining.


Primary Bore(1/18/2005):

A small hole is bored out with the lathe in order to fit in a boring bar that will turn the hole out to the proper size.


Secondary Bore(1/19/2005):

A 1.5" OD hole is bored out with the lathe using a boring bar in order to fit the vacuum flange. The hole is counter bored to provide a lip for the flange to sit on.


Counter Bored Hole(1/19/2005):



Flange Fit(1/19/2005):

Flange firs tightly into bored hole.


Hemisphere (1/19/2005):

Hemisphere 1 assembled and ready for welding.


Core Components (2/1/2005):

Core machining complete and ready for welding.


Useful links: Open Source Fusion Research Consortium.





By attempting to reproduce any experiments or devices listed on this domain in part or in whole, you agree to hold me harmless against any lawsuit or liability.

Copyright © 1998 - 2005 by Andrew Seltzman. All rights reserved.

Contact me at: