Additional Notes:

 Additional Task (1.4a): Cover holes in girder. This was done after gluing & polishing on this module but should be done before installing the rail.
 
 
 
 
 
 

 
 
 

2. Tile Installation
Task	Description	Controls	Date &Time		Work Crew	Comments
2.1	QC1a: Tile Inspection	S W #	2/18		RJM	No problems noted
Item		OK	Not OK : List problems and repairs
Tile Color		OK
Tile End Surfaces		OK
Tile Wrappers		OK	Lots of sleeves separted from tiles because of tight fit in slots
2.2	Record Tile Batch Numbers	S #				See materials list
2.3a	Insert Tiles	S H	2/18/00		MN
2.3b	Insert Special  ITC Tiles	S H	2/21/00		MN

 
 
 
 
 
 

Task

Description

Controls

Date &Time

Work Crew s

Comments

2.4

QC1b: Tile Inspection

S W #

2/18

RJM

Item

OK

Not OK : List problems and repairs

Tile Sizes

OK

Tile End Surfaces

OK

Tile Wrappers

OK

See Above

2.5

Install Rods

S

2/23

RJM

2.6

Install Inspection Light Tubes

S

Additional Notes:

1. Fiber # 34 Even side is bad
2. Fluorescent Light Tube used- one lamp broken so not all fbers could be checked.
3. D cells checked only by omission of light when lights are in A and B layers.
4. Only one problem noted.  One fiber had become loose and slipped down in profile.  Also seen in length check.

 

3. Routing Preparations
Task	Description	Controls	Date & Time		Work Crew	Comments
3.1	Install QC Light Sources	S	3/3		RJM	One Lamp Broken
3.2	Install Fiber Separator Wires	S	2/29		MN
3.3	Install ITC Fiber Assemblies	S #	2/28		MN	ID #:42L&R
3.4	Install Laser Fiber Bundles	S #	2/23		MN	ID #:EB19(even side), EB20(odd)

Additional Notes:
Laser Fibers should be labeled by cell number before installation.  We will make sets of
labels.  The cable ties on laser fibers were too close to the ends of fibers and had to
be cut off.  Send note to Joao.

Laser fibers to last 2 PMT's (E4 and D4): the longer fiber goes to E4 and the shorter
one to D4 - opposite to the rest of the module.
 

 

4. Fiber/Profile Installation
Task	Description	Controls	Date &Time		Work Crew	Comments
4.1	Insert Profiles/fibers	S H	2/24:28		MN & students
4.2	Record Profile Batch Numbers	S #	See  materials  list
4.3	QC2: Verify Fiber Lengths and Sorting	S W #	3/2/00		RJM,MN	See below
Item		OK	Not OK : List problems and repairs
Fiber Lengths		OK	Some fiber in A16 and B16 are 10cm too long, cut before gluing
Fiber Counts		OK
Depth Sorting		OK
Visual Light Levels		OK	Light tube only partially working, see below
4.4	Tape Profiles	S R

Additional notes:

The flourescent light tubes were used to check the fiber sorting by depths.
One lamp was broken, so not all fibers were checked.  This light system is not
going to work - we are replacing it with LED's as soon as possible.
Only one problem was found with the fibers.  One fiber had become detached
from the profile and slipped below the tile.  This was also seen in the length
check.
 

5. Fiber Routing
Task	Description	Controls	Date &Time		Work Crew	Comments
5.1	Make fiber sub-bundles	S	3/6		MN	See notes below
5.2	Route Sub-bundles To Aspirin Tubes	S H	3/6:8		MN, RJM	See notes below
5.3	QC3: Verify Fiber Routing	S W #	3/9		RJM
Item		OK	Not OK : List problems and repairs
Side A Cells		OK
Side B Cells		OK
5.4	Register and Secure Fibers in Aspirin Tubes	S H	3/8,9		MN

Additional Notes:

1.  We used silicon tubes around the fibers and cable ties to hold the registration
of the fiber ends.  For future modules these lengths of tubing should be used as
the depths are sorted instead of velcro ties.  They should be labeled or color coded
to identify the depth.
2.  We installed glue injection tubes in the fiber bundles and registered the ends of
these to be even with the ends of the fibers. THIS IS A DEPARTURE FROM THE
STANDARD GLUING PROCEDURE.
3. The fiber bundles were marked with an erasable pen at the surface of the aspirin
tubes after the bundles were fully inserted.  The mark is checked before and after
gluing to look for any slipage.
4.  The fiber bundles were clamped in the silicon tubes using the 3rd setting on the
the cable tie pulling tool.
5.  The laser fiber routing has not been completely defined.  Some are routed into the
left hand bundle of fibers, some into the right hand bundles.  Usually these fibers are routed
around the neighboring PMT's
6  We inserted one spare fiber (clear) per PMT + one more that will be fed into the
gluing tube after gluing.
7.  The laser fiber is especially hard to register because the end is not visible.  For this
module, Mike gave it special attention.  For the future modules, we will illuminate the laser
fibers with an LED.
8.  Insertiion of the dummy fibers takes special care.  The last few require pushing hard -
a slip or careless location of hands can break WLS fibers.  Make them 4-1/2 inches long.
Take care that they don't jam between the silicon tube and the aspirin tube.
9.  We can try to check that the fibers are at the bottom of the aspirin tube by looking
inside the girder with a mirror (or with the TV camera).
10.  We checked the ITC scintillator fibers (E cells) by illuminating with a red LED.
 
 
 
 

Task	Description			Controls		Date &Time		Work Crew	Comments
5.5		QC4: Fiber Registraton and Damage	S W #		3/10/00			RJM
Item				OK		Not OK : List problems and repairs
Broken fibers				OK
Stress Crazing				OK
Cladding Damage				OK
Fiber Curvature				OK
Fiber Contact				OK
5.6	Secure the Sub-bundles			S R		3/9		MN

Additional Notes:
 
 
 
 
 

6. Glue fiber bundles
Task	Description	Controls	Date & Time		Work Crew	Comments
6.1	Glue Side A	S	3/10		RJM,MN,RR	See below
6.2	Glue Side B	S	3/10		RJM,MN,RR	See below
6.3	Reserve Samples of Epoxy	S	3/10
6.4	Epoxy Cure	S H	3/12

Additional Notes:
6.1 Glued with tube into bottom of aspirin tube.
6.2 Fill until glue comes out of slot.  This went well.
 

7. Secure fiber bundles
Task	Description	Controls	Date & Time		Work Crew	Comments
7.1	Cut dummy fibers	S				Done after QC6
7.2	Tie Fiber Bundles to Rails	S	3/20		MN	Done before QC6

 

Additional Notes:

Laser input fiber was routed after glue cured: 3/13 by MN
 
 
 

8. Polish Fiber Ends
Task	Description	Controls	Date & Time		Work Crew	Comments
8.1	Setup the Polishing Machine	S	3/15		RJM,MN
8.2	Polish Fibers	S	3/15		RJM,MN	See below
8.3	Remove Polishing Machine	S H	3/15		RJM,MN
8.4	QC5: Inspect Fiber Ends	S W #  R	3/15		RJM
Item		OK	Not OK : List problems and repairs
Surface Quality		OK	Checked with TV camera
Visual Light Level		OK	No obvious problems

 

Additional Notes:
 

3/15/00    When we first started to do the polishing the saw blade hit the
first  girder ring inside the module (no fibers in this girder ring).  We
quickly stopped the motor and backed the machine out.  We had forgotten to
attach the extra ring at the transition between the girder and the extension.

The speed control was set @1 and the travel rate was 2/3 mm/sec
 

10. Close up
Task	Description	Controls	Date & Time		Work Crew	Comments
10.1	Remove Fiber Separator	S	3/6		MN	Done before routing
10.2	Remove Temporary Labels	S				Labels left on
10.3	Cover Module with Plastic Sheet	S	3/20		MN	Used black plastic
10.4	Attach Girder End Plates	S				No plates

 

11. Cleanup
Task	Description	Controls	Date & Time		Work Crew	Comments
11.1	Remove Assembly Fixture	S				Work stages removed whenever needed
11.2	Remove Supplies and Tools	S

Additional Notes:

No special cleanup was needed after polishing.  The high volume vacuum
system worked well to suck out chips and cutoff ends of aspirin tubes.

This page maintained by: - RJM
Last Update: 08/21/00 by: -CJW