1. 1st solution. Cut internal to the plate with startup hole
1280 pezzi
W foil
87.55 mm square
41.75
NOT in the middle
Vacuum tool has aspiration holes in the middle
Start hole diam.~1mm
EDM slot, midway between
both sides, stopped 2 mm
from each side, cut with
0.2mm wire
=760mm
270mm
3/9/03
A.Brez INFN Pisa
Test on 0.1mm W sample

2. 2nd solution with 2 cuts No start hole 2 slots 2mm out of center
Symmetric
1mm
4mm
270mm
3/9/03
A.Brez INFN Pisa
Test on 0.1mm W sample

3. conclusions The 2 possibilities have been successfully tested
The amount of removed material is negligible:
0.27mm/87.55mm = 0.3%
(the fluctuation on plate thickness is ~±3%)
The second solution is preferred (cost, symmetry, preferred by manufacturer)
3/9/03
A.Brez INFN Pisa