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→Procedure
**If someone is in the conference room, the clean room is a good alternative.
**If someone is in the conference room, the clean room is a good alternative.
*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each.
*Using the matrix in the spreadsheet as a guide, split the fibers in to the appropriate columns of 5 fibers each on a flat surface.
*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first.
*Start with one column and put the fibers from that column in their appropriate order per the matrix on the spreadsheet. It is best to start with the offset 15 fibers first. It is best to use the bundling tool for this process and support the fiber using the Bundling Support. Be sure the fiber ends are secured and not bent at the end.
*Continue this process with the remaining columns.
*Continue this process with the remaining columns.
*Once the fibers are in the order they belong, begin placing them in the wide clamp on the popsicle stick.
[[File:LH-FiberQA_BendingSupport.jpg|center|The bending support constructed to aid in the process of bundling for Fiber QA.]]
*Once the fibers are in the order they belong, place them on the popsicle stick and secure the metal clamp and the end kapton strip.
**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 popsicle 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.
**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.
**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.
*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 .25 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.
*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.
**Also place a strip of paper between the two bundles of 15.
*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 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.
*Repeat the process of adding paper spacers to the other bundle of 15 sharing a popsicle stick.
*Repeat the process of adding paper spacers to the other bundle of 15 sharing a popsicle stick.
[[File:LH-FiberQA_SciFiPaper.jpg|center|A view of the scintillating fibers directly after paper spacers have been placed and the fibers are flush.]]
*Now it is time to make the face of the scintillating fibers flush with one another. This job also takes two people.
*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.
**One person should be holding another popsicle stick inverted 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.
**Do this for both bundles of 15.
**Do this for both bundles of 15.
*Once each fiber has been pushed into the rigid material, the fibers should be held in place by re-tightening the metal strap and adding the kapton strips. 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 to the edge, the fibers should be held in place by re-tightening the metal strap and adding the kapton strips and the wooden stick underneath. The popsicle stick should be carefully moved away to determine if the fibers are flush. If not, repeat the process again.
**Kapton strips should be placed around the "up-stream" bundle and around both bundles at the end of the popsicle stick.
**Kapton strips should be placed around the "up-stream" bundle and around both bundles at the end of the popsicle stick. Place a short piece of wood between the top of the fibers and the kapton. This helps pull all fibers tight to the popsicle stick.
*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.
*After you are sure that the fibers are properly separated and flush with each other, make sure the wires and clamp is tight so that no fibers can change position.
[[File:LH-FiberQA_Preamp.jpg|thumb|right|Preamp board 00001. The 15 SiPMs are across the top. Only trained lab technicians should handle the preamp boards!]]
[[File:LH-FiberQA_Preamp.jpg|thumb|right|Preamp board 00001. The 15 SiPMs are across the top. Only trained lab technicians should handle the preamp boards!]]
*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the preamp board after opening the dark box.''' Carefully unscrew the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''
*'''Check that all electronics are off before opening the dark box! Have a grad student or lab technician remove the preamp board after opening the dark box.''' Carefully open the main dark box opening and dock the popsicle stick into place by tightening the two screws underneath the popsicle stick to secure it into place. The wood has been depressed in the place where the popsicle stick should be. '''Do not modify the position of the pulsar at any point during the loading process!'''
*'''A grad student or lab technician''' must put the SiPM board back into place. Do not just use your thumbs to push in the pre-amp boards as it may bend the backplane. Gently slide the board into place and screw in the chimney support until it is flush against the chimney.
*'''A grad student or lab technician''' must put the SiPM board back into place. Do not just use your thumbs to push in the pre-amp boards as it may bend the backplane. Gently slide the board into place and screw in the chimney support until it is flush against the chimney.
*Close the main dark box opening and ensure that it is light sealed.
*Close the main dark box opening and ensure that it is light sealed.
*Turn on the power supply for the pulser and the op-amp first. Check that the voltages remain constant at 1.5 V and -10 V. Next turn on the power supply for the pre-amps and backplane electronics.
*Turn on the power supply for the pulser and the op-amp first. Check that the voltages remain constant at 1.5 V and -10 V. Next turn on the power supply for the pre-amps and backplane electronics starting with the power for the control board.
**Watch the control board's power supply current. If it exceeds. 0.38 amps, let a lab technician know immediately!
{|style="margin: 0 auto;"
{|style="margin: 0 auto;"
|[[File:LH-FiberQA_PulserPower.jpg|thumb|center|A view of the power supply powering the pulser and op-amp.]]
|[[File:LH-FiberQA_PulserPower.jpg|thumb|center|A view of the power supply powering the pulser and op-amp.]]
|}
|}
*Start the run from the gryphn.uconn.edu web address.
*Start the run from the gryphn.uconn.edu web address.
**It takes 7-8 minutes from the time the run begins to complete. If the run does not finish in this time, something has gone wrong. Notify a grad student.
**It takes 7-8 minutes from the time the run begins to complete. If the run does not finish in this time, something has gone wrong. Notify a grad student or lab technician.