Assembling the Tokamak Toy

Assembly of the TokoToy is quite simple. Please follow the step-by-step instructions given below. Full assembly in 14 steps should not take more than 10 minutes.

Click to view TokoToy assembly video



Step 1 : Take the lower base plate
(1 no)
Step 2 : Take the SIX support structure stubs and place them on to the round receptacles on the Lower Base Plate. Push-fit then to ensure that they are tight and straight.
Step 3 : Take the THREE vacuum pump blocks into the three square receptacles on the Lower Base Plate. Push-fit them to ensure that they are tight and straight.

Step 4: Take the upper base plate and push fit it on to the support system and vacuum pump blocks mounted on the lower base plate. Some amount of adjustment will be needed to align all the stubs. Once aligned, push fit all the parts into position.

Step 5 : Take the Poloidal Field (PF) coil and  attach it to the upper base plate.  This will snap fit into the grooves on the upper base plate.  Since both these PF coils are identical, you can use any one of the two.

Step 6 : Take the plasma block and attach it to the back plate of the vacuum vessel. The plasma block will snap on to the groove on the back plate.
Step 7: Take the outer vacuum vessel piece and snap-fit it to the inner vacuum vessel piece aligning the pins on the outer piece with the holes on the inner vacuum vessel piece. Push fit it to snap in place.  

Step 8 : Take FOUR of the Toroidal Field (TF) coil blocks and snap fit them into the slots on the upper base plate. Make sure that they stay tight and vertical.  
Step 9: One by one, slide two of the three vacuum vessel assemblies (from Step 7) through the TF coils. Please make sure that the snapping pins at the ends of the vacuum vessel assembly are correctly aligned.
Step 10 : Snap-fit the two vacuum vessel blocks to assemble the TF and vacuum vessel. Slide the  remaining two TF coils on to the third vacuum vessel assembly and snap-fit the TF coils to the base. Then proceed to snap-fit the third vacuum vessel to the remaining two previously assembled vacuum vessels.  
Step 11 : After joining all the three vacuum vessel components, gaps at the joints between them would be visible. Now, slide the vacuum vessel components inside the TF coils to ensure that they are positioned in such a way that  the gaps between the vessel sections are not visible anymore.
Step 12 : Take the other Poloidal Field (PF) Coil and snap-fit it on to the stubs provided on the top of the six TF coils. Press down to push fit and fix.
Step 13: Snap-Fit the vacuum vessel windows on to the space on the vacuum vessel. Please match the curvature of the vessel with that of the window assembly while snap-fitting.
Step 14 : Take the Central Solenoid block and push-fit it on to the groove provided on upper base plate, in the vertical centre of the device.
If you have reached this far successfully,
Congratulations, you have now assembled the TOKAMAK toy!

The TokoToy parts are made of injection molded polypropylene and certain parts could end up having a slightly incorrect fit due to temperature induced warping of the plastic material. Slight filing of the ill-fitting part with some sand paper or file can solve the problem.  

TokoToy, its concept and design  are proprietary to the Institute for Plasma Research, Gandhinagar (Gujarat). This toy is NOT for sale.


© IPR, 2023