The following is my straw-man list of requirments that we think need to be satisfied for a PRR on the parts of the FSI system which need to go into/on the ATLAS detector.

PRR's for the other parts of the FSI system have a longer timescale and can wait about another 2 years.

There are these broad catagories of items:

I think our PRR should focus on the manufacturing process of these items to determine the following points:

1). Do we have a production mechanism in place that will allow manufacture of the final design to our specifications.

2). Does the manufacturing process permit the flexibility to accomodate minor changes in barrel/disk design that might occur in the future.

One item that I do not think needs to be in the PRR is a 'final' design, otherwise we will be forced to forever wait until the cooling design is complete and barrel radii fixed. These are examples of issues which, though important and need to be fixed for absolute 'final' designs, They are not determining factors mitigating our ability to produce the parts we need to do the job we want.

Below, for each item, is a list of tests that I think must be done before those two points can be demonstrated by our group.

All Materials for devices:

Test for being sufficiently Rad-Hard.

Fibres:
Show an acceptable light transmission level before and after radiation tests. ('Acceptable' is always defined in the specification. In some cases this might need to be written down, and it might as well be here.)

Quills:
Show that a process exists in-house which can produce quills with fibres which are parallel to each other within specification. (This need not necessarily be with the final fibre, as long as the bend radius and diameter of the fibre used is the same as the final fibre.)

Show that the reflected signal from the glass beam splitter is down by the specified fraction with respect to the primary source fibre, and that we have an in-house process to manufacture and mount the beam splitters.

Show that quills operate properly in the prototype FSI system.

Retro-reflectors:
Show that our manufacturing process is capable of producing retro reflectors with an equivalent surface profile which shows less than 1um of relief over 100um of transverse travel on any reflective surface.

Show that adverse conditions in a nitrogen environment (Temp. cycling) do not effect the reflectivity of the retro-reflectors by more than a factor of two from first manufacture.

Show that a process exists to minimize blemishing on retro-reflector faces.

Show that retro-reflectors operate properly in the prototype FSI system.

System issue:
Show that both quills and retro-reflectors operate properly in the prototype FSI system.

Jewels:
Demonstrate Jewel manufacturing capability using a barrel mini-grid.

Show that the barrel mini-grid can measure changes in postition of the jewels to the limit of accuracy of the prototype FSI system.
SCAN-3 has proven this in simulation, do we need to also have this shown in a demonstrator system prior to the PRR?

Prototype FSI system:
Demonstrate accuracies in the measurement arm of 1um or better over a 1m distance.
(This has been shown by Paul Coe.)