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Line 11: − + − + − − *Turn off all overhead lights and turn on the UV protected lights over the bending unit. Line 21:
Line 19: − + − OB(a) - OH(b) - ON(a) - OE(a) - OJ(a) - OO(a)<br> − O4(a) - O9(a) - O14(a)- OD(b) - OI(a) - O15(a)<br> − O3(a) - O8(b) - O13(b)- OC(a) - O10(a)- OM(a)<br> − O2(a) - O7(a) - O12(a)- O5(a) - OG(a) - OL(a)<br> − O1(a) - O6(a) - O11(a)- OA(b) - OF(a) - OK(a)<br> − − Then they should be placed in the bundling tool as: − OO(b) - O15(b)- OM(b) - OL(b) - OK(b)<br>+ − OJ(b) - OI(b) - O10(b)- OG(b) - OF(b)<br>+ − OE(b) - OD(a) - OC(b) - O5(b) - OA(a)<br>+ − ON(b) - O14(b)- 013(a)- 012(b)- 011(b)<br> − OH(a) - O9(b) - O8(a) - O7(b) - O6(b)<br> − OB(b) - O4(b) - O3(b) - O2(b) - O1(b)<br> − + − + + + + − + − + Line 70:
Line 61: − + − *Make sure the first collar (the collar closest to the popsicle stick) is tight enough to hold the fibers in place without slipping. Detach the first collar from the bending plate. + − *Loosen the second collar so that the fibers may slide through it without damage or change in orientation. Line 134:
Line 124: − {{File:JK Popsicle Stick Top.JPG|thumb|center|The popsicle stick top placed on top of the fibers with both of the rods secured through it.]] Line 141:
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Line 171: − + − + − − [[File:JK Bending Unit in Tank.JPG|thumb|center|The bending unit in the tank before being removed.]] − + Line 195:
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Hot Water Fiber Bending Procedure (view source)
Revision as of 17:13, 9 June 2014
, 17:13, 9 June 2014no edit summary
==Overview==
==Overview==
The light guide is offset soon after the SciFi section in an S-bend to reduce the amount of fiber exposed to the electrons' trajectory. Fibers are placed within a water tank, heated with the water, then bent and cooled within the tank. The process takes many hours.
The light guide is offset soon after the SciFi section in an S-bend to reduce the amount of fiber exposed to the electrons' trajectory. Fibers are placed within a water tank, heated with the water, then bent and cooled within the tank. The process takes many hours and requires three technicians.
==Preparation Procedures==
==Preparation Procedures==
===Orientation===
===Orientation===
*First ensure that each part of the bending unit is clean and don a pair of powder-free gloves.
*First ensure that each part of the bending unit is clean and don a pair of powder-free gloves. If the bending unit is not clean, see the [http://zeus.phys.uconn.edu/wiki/index.php/Fiber_Bending_Procedure#Post-Bending_Procedure_and_Cleaning Post Bending Cleaning Procedure].
*Be sure that the chimneys and the bottom halves of the collars are attached to their appropriate plates.
*Attach bottom fiber collars 2-7 (as labeled in the image in [http://zeus.phys.uconn.edu/wiki/index.php/Fiber_Bending_Procedure#Setting_Up_The_Plates Setting Up The Plates] ) to the Bending Plate. The bottom collars are the ones with the male threads, not through holes.
*Open the intermediate storage box and remove the fibers you will be bending. Place these fibers on a flat surface, always being cautious with the fuse site.
*Open the intermediate storage box and remove the fibers you will be bending. Place these fibers on a flat surface, always being cautious with the fuse site.
[[File:aligner.JPG|thumb|center|Bundling tool.]]
[[File:aligner.JPG|thumb|center|Bundling tool.]]
*Use the bundling tool to place the fibers in the correct orientation and position as defined by the Bundle Names Google Document.
*Use the bundling tool to place the fibers in the correct orientation and position as defined by the Bundle Names Google Document. Remember that the orientation listed in the Bundle Names document is from the view of the scintillating fibers.
**'''Note:''' Because the bundling tool is 5 fibers wide and 6 fibers high, and the collars are 6 fibers wide and 5 fibers high, the bundling tool must be rotated when placing fibers in the collars. Therefore when the bundling tool is used, the fibers should be put in columns first with the orientation opposite of what is stated in the Google Doc, and their order rotated 90 degrees. For example if the final position and (orientation) of the fibers is:
**'''Note:''' Because the bundling tool is 5 fibers wide and 6 fibers high, and the collars are 6 fibers wide and 5 fibers high, the bundling tool must be rotated when placing fibers in the collars. Therefore when the bundling tool is used, the fibers should be put in columns first with the orientation opposite of what is stated in the Google Doc, and their order rotated 90 degrees. For example if the final position and (orientation) of the fibers is:
[[File:LH_BundlingImage.png|thumb|center|An example of how to properly load the bundling tool for bending. Corner fibers have been colored for understanding and also include orientation. Of course, all fibers will require a specific orientation, but only the corner fibers have been shown as an example.]]
*Put a collar around the bundle so that it is secure around the fibers but does not cause damage. The fibers should not be able to slide through, rotate, or change orientation.
*Put a collar around the bundle so that it is secure around the fibers but does not cause damage. The fibers should not be able to slide through, rotate, or change orientation.
**'''Note:''' While working with one end of the bundle, always be cautious of the other end. Any bends may cause damage to the fiber.
**'''Note:''' While working with one end of the bundle, always be cautious of the other end. Any bends may cause damage to the fiber. It is helpful to have a second technician watch the fuse end while the first technician bundles the fibers.
[[File:JK First Bending Collar.JPG|thumb|center|After the fibers have been properly aligned in the bundling tool and the tool has been rotated a collar is placed on the fibers to secure them in their positions.]]
[[File:JK First Bending Collar.JPG|thumb|right|After the fibers have been properly aligned in the bundling tool and the tool has been rotated a collar is placed on the fibers to secure them in their positions.]]
===Setting Up The Plates===
===Setting Up The Plates===
The entire bending unit consists of a long unistrut support, the bending plate with threaded metal rods, and two chimney plates. These plates are aligned and clamped together with 4 C-clamps. Do not attach both chimney plates at this stage in the procedure. You must place 15 of the fibers into Chimney Plate 2 before securing Chimney Plate 1 and completing the bundle.
[[File:LH_BendingUnit.png|thumb|upright|left|A simplified graphic outlining how the plates should be layered when securing the fibers into the plates. The unistrut (long gray bar) should be underneath the bending plate (blue plate with green and yellow rods, and pink collars) and between the two chimney plates (blue plates with yellow chimneys).]]
{|style="margin: 0 auto;"
{|style="margin: 0 auto;"
|[[File:JK Bending Plate.JPG|thumb|upright|The bending plate with metal rods inserted.]]
|[[File:JK Bending Plate.JPG|thumb|upright|The bending plate with metal rods inserted.]]
|[[File:JK Unistrut Clamped to Plate.JPG|thumb|upright|The unistrut support clamped to the bending plate.]]
|[[File:JK Unistrut Clamped to Plate.JPG|thumb|upright|The unistrut support clamped to the bending plate.]]
|[[File:JK Dummy Plate 1.JPG|thumb|upright|Dummy chimney plate 1.]]
|[[File:JK Dummy Plate 1.JPG|thumb|upright|Chimney plate 1.]]
|[[File:JK Dummy Plate 2.JPG|thumb|upright|Dummy chimney plate 2.]]
|[[File:JK Dummy Plate 2.JPG|thumb|upright|Chimney plate 2.]]
|}
|}
====Offsetting the Fibers====
====Offsetting the Fibers====
The next step involves offsetting the SciFi end past the bending unit. This will compensate for the length of fiber required to produce the S-bend.
The next step involves offsetting the SciFi end past the bending unit. This will compensate for the length of fiber required to produce the S-bend.
*Minding fiber orientation, secure the second collar around the bundle.
*Recall that the fiber collar around the fibers currently holds the bundles orientation and is tight enough not to damage fibers but does not allow any fiber movement. Gently move the bundle from your flat surface used for bundling to the bending plate. This collar will be referred to the "first collar" from here on out.
*Secure the second collar (currently attached to the bending plate) around the bundle such that the first collar (the one used to hold the orientation) is closest to the edge of the bending plate. Tighten collar 2 only so that the orientation does not change but the fibers may slide through it without damage.
*Slide the first collar so that the fibers are flush against the edge of the bending plate.
*Slide the first collar so that the fibers are flush against the edge of the bending plate.
*Tighten the second collar so that the fibers do not slide.
*Tighten the second collar so that the fibers do not slide.
*Gently place the popsicle stick top onto the fibers without stressing them, and put the two rods through the popsicle stick. The rods are different, so if they are not properly aligning with the threaded rods, switch their positions. Secure the bolts onto the threaded rods a few turns so that the popsicle stick top doesn't move.
*Gently place the popsicle stick top onto the fibers without stressing them, and put the two rods through the popsicle stick. The rods are different, so if they are not properly aligning with the threaded rods, switch their positions. Secure the bolts onto the threaded rods a few turns so that the popsicle stick top doesn't move.
===Filling and Siphoning the Tank===
===Filling and Siphoning the Tank===
* Once the tank has been drained and cleaned, open all of the valves near the right exclusion area including the inlet valve from the faucet.
* Once the tank has been drained and cleaned, open all of the valves near the right exclusion area including the inlet valve from the faucet.
*Turn on the cold water and let the tank fill.
*Turn on the cold water and let the tank fill.
*It will take about 30 minutes for the tank to fill high enough to immerse the fibers and bending unit. Fill the tank until the water reached the top of the highest horizontal 2x4.
*It will take about 30 minutes for the tank to fill high enough to immerse the fibers and bending unit. Fill the tank until the water reached the top of the highest horizontal 2x4. Once you have enough water, close valves 2 and 3
*Once the tank is full you should wait for thirty minutes to allow any air bubbles to coalesce into bigger bubbles so they may be siphoned out.
*Once the tank is full you should wait for thirty minutes to allow any air bubbles to coalesce into bigger bubbles so they may be siphoned out.
**Put the siphon completely underwater in the tank and pump it until no more air bubbles come out.
**Put the siphon completely underwater in the tank and pump it until no more air bubbles come out.
*After the water systems have been siphoned and there are no air bubbles, have two technicians place the bending unit and fibers into the room temperature water.
*After the water systems have been siphoned and there are no air bubbles, have two technicians place the bending unit and fibers into the room temperature water.
[[File:JK Bending Unit in Tank.JPG|thumb|center|The bending unit in the tank.]]
===Running the LabView Program===
===Running the LabView Program===
===Bending===
===Bending===
Three lab technicians will be needed for this procedure. Be sure all technicians have read the procedure before bending. This section should be completely done in approximately 3-3.5 minutes and is extremely important. Fibers are very delicate in this stage and may easily break.
Three lab technicians will be needed for this procedure. Be sure all technicians have read the procedure before bending. This section should be completely done in approximately 3-5 minutes and is extremely important. Fibers are very delicate in this stage and may easily break.
*Place the four stools upside down on the ground in the spots designated by tape.
*Place the four stools upside down on the ground in the spots designated by tape.
*Wear thick rubber gloves to protect your hands from the hot water.
*Wear thick rubber gloves to protect your hands from the hot water.
*Two technicians should remove the bending unit from the tank and place it upside down on the stools.
*Two technicians should remove the bending unit from the tank and place it upside down on the stools
*All clamps should be removed from the bending unit. Be careful taking them off as now the chimney plates are no longer attached to the bending plate.
*All clamps should be removed from the bending unit. Be careful taking them off as now the chimney plates are no longer attached to the bending plate.
*With one technician holding the bending plate, and one technician bracing the chimney plates and bar, have the third technician take hold of the top bending plate and secure it on the first two threaded rods.
*With one technician holding the bending plate, and one technician bracing the chimney plates and bar, have the third technician take hold of the top bending plate and secure it on the first two threaded rods.
**Repeat this step for the other bending plate.
**Repeat this step for the other bending plate after removing the bending bar.
***This is the most important part. Do not drop the bending plate as it will break many fibers.
***This is the most important part. Do not drop the bending plate as it will break many fibers.
*With one technician still securing the bending plate, place the second two threaded rods in their positions and screw them into the bending plate.
*With one technician still securing the bending plate, place the second two threaded rods in their positions and screw them into the bending plate.
*Lift the now bent fibers and bending unit on its side on top of the tank cover.
*Lift the now bent fibers and bending unit on its side on top of the tank cover.
*Gently and evenly tighten the bolts on the popsicle stick. There are four- make sure none is too much tighter than any other. This will create an even and smooth S-bend.
*Gently and evenly tighten the bolts on the popsicle stick. There are four- make sure none is too much tighter than any other. This will create an even and smooth S-bend.
**Watch the fiber orientation while screwing on the bolts for the S-bend. If any fibers become misaligned, use a small piece of plastic to re-align them while creating the S-bend.
*Once the S-bend is created uncover the tank, and gently place the bending unit into the hot water.
*Once the S-bend is created uncover the tank, and gently place the bending unit into the hot water.
*In the LabView program, turn off heaters 1 and 2. Make sure the pumps are still running.
*In the LabView program, turn off heaters 1 and 2. Make sure the pumps are still running.
*Prop open the cover slightly and wait until the water cools to room temperature.
*Prop open the cover slightly and wait until the water cools to room temperature. You may place a ventilator under the top to speed up the cooling process.
**This should take at least 12 hours.
**This should take at least 12 hours.
**The water must be under 110 degrees Fahrenheit before the fibers are removed.
**The water must be under 110 degrees Fahrenheit before the fibers are removed.
Because of the metals reacting with the water in the tank, the resulting bending unit and fibers have deposits of rust and hard water stains. Everything must be cleaned before the next step or before reuse.
Because of the metals reacting with the water in the tank, the resulting bending unit and fibers have deposits of rust and hard water stains. Everything must be cleaned before the next step or before reuse.
'''For cleaning the fibers''': Wet half of a lint-free cloth. Gently clean each individual fiber from end to end using the wet cloth. Once all or most deposits are removed, go over the entire fiber again with the dry side of the cloth. Be sure the fiber is clean and dry before moving onto the next fiber. All 30 fibers must be cleaned before storage.
'''For cleaning the fibers''': Wet half of a lint-free cloth. Gently clean each individual fiber from end to end using the wet cloth. Once all or most deposits are removed, go over the entire fiber again with the dry side of the cloth. Be sure the fiber is clean and dry before moving onto the next fiber. All 30 fibers must be cleaned before storage.
{|style="margin: 0 auto;"
{|style="margin: 0 auto;"