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**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.
**This step will take two people. One person should place the fibers, while the other should hold them in place once they are placed. This way fibers will stay in their appropriate positions.
*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future.
*Loosen the clamp and move it down over the fibers. Tighten it enough so they do not slip but not too tight as to make it impossible to add paper spacers in the near future. Also use the wires that are going through the holes in the popscile stick to your advantage. Tightening them around the fibers will do a good job of keeping the fibers in place.
**The fibers do not have to be flush with one another at this point. The next step, putting in paper spacers, will move them out of alignment anyways, so do not waste time on a step that will have to be repeated.
*To add paper spacers, use an index card and cut strips that are the width of the lines on the card. Then cut them into pieces that are about .5 inches long.
*The first set of paper spacers will go on the scintillating fiber end. Place strips of paper between each of the rows, and push them about an inch into the fiber. You will need to use any bit of paper that is sticking out of the sides to do this as you can't push between the rows themselves.
**Also place a strip of paper between the popsicle stick and the bottom row of fibers.
*Next, put strips of paper between each of the 3 columns. These strips of paper do not need to go far back, just far enough that they will not block any light from the pulser getting to the fiber face.
*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.
*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
**One person should be holding a rigid piece of material along the popsicle stick where the fibers protrude while another person goes through each fiber and one by one pushes it in to the material.
*Once each fiber has been pushed into the rigid material, the fibers should be held in place by twisting the wire tightly around them. The rigid material should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.