Changes

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.   

'''If the electronics are powered and the dark box is open, the siliconphotomultipliers WILL be damaged''', so it is very important to make sure electronics are off before the dark box is opened.   

'''Procedure'''

==Procedure==

 

*Before taking any fibers out of the dark room, open the [https://docs.google.com/spreadsheets/d/11dipDk7WZ5PHp3xFHyUtVzUyJhcY9ewnyDf5FEbtbig/edit| Fiber testing spreadsheet] and click on the tab titled "Fiber Tests 2."  In this tab, the fibers to be tested have been put in the appropriate chimney slot column and in the matrix placement of fibers.  

*Before taking any fibers out of the dark room, open the [https://docs.google.com/spreadsheets/d/11dipDk7WZ5PHp3xFHyUtVzUyJhcY9ewnyDf5FEbtbig/edit| Fiber testing spreadsheet] and click on the tab titled "Fiber Tests 2."  In this tab, the fibers to be tested have been put in the appropriate chimney slot column and in the matrix placement of fibers.  

*Once the fibers are in the order they belong, begin placing them in the clamp on the popsicle stick.

*Once the fibers are in the order they belong, begin placing them in the clamp on the popsicle stick.

**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. 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.

*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.

*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.

*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.   

*The next step is to put spacers in the middle of the s-bend in the fibers for both columns and rows.   

*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.

*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.