A detailed discussion of the E864 detectors and their performance requirements was given in the experimental method section above. A review of the basic systems and the number of channels in each detector is given here for clarity.
Each of the three hodoscope planes consists of 256 counters, with each counter viewed by two phototubes. The Pb/fiber calorimeter is made of 936 towers, also viewed by phototubes. Each of the three straw tube tracking stations will cover (x,y,u) coordinates, with two planes of straws for each coordinate to ensure full efficiency. There will be a total of 5430 4 mm diameter tubes, and 3858 8 mm diameter tubes. There will also be a multiplicity counter used in the pretrigger, electronics for a higher-level trigger, and a data aquisition system to record the experiment's data.
The detector cost estimate for these systems comes to a total of
$ 5,847,000, plus $ 41,000 of the R&D request which provides some equipment
used to fabricate the E864 detectors. The reasoning used to get this number
is outlined in
Tables 
-. This estimate accounts for the
materials and labor needed to build the systems listed above. It is based on
discussions with vendors and includes quantity discounts wherever
applicable.
This estimate is meant to be representative of detectors which can be built using already-existing methods, or systems purchased as new equipment. We therefore feel that this estimate is an upper limit of the cost of the experiment. For example, actual quantity discounts cannot be realized without initiating a formal bidding process between vendors. Finally, additional savings from obtaining used materials or systems were not included.
Table: Cost estimate of E864 Pb/fiber calorimeter. The tooling costs in
parentheses are contained in the R&D budget.
Table: Cost estimate of E864 hodoscopes, tracking chambers, and PMT's.
Table: Cost estimate of E864 electronics.
Table: Cost estimate of other E864 systems.