1. IP carbon wire scanner Status –Assembly is proceeding –Supply of 4um carbon fiber may be unusable. –4um tungsten wire can be used but could easily be broken by the beam. –7um carbon fiber can be found. –Technician who attaches wires is retiring –ATF personnel need to lean how to attach wires.

2. IP carbon wire scanner Decisions to be made –Wires sizes and angles for the vertical scanner 4um carbon may not be available Can we use 7um carbon? If we use 4um tungsten then currents must be kept low to avoid breaking these wires. Around 1-2 e9 with spot sizes above 2um Wire angles machined were for flat beams. May have to remake cards. But there is no money for that? –Size and type of wires for 45deg. scanner. –Control of scanner motion Use SLAC Joerger modules controlled through CCNET controlled camac crate. Use ATF stepper motor control methods. Read back position of vertical scanner with LVDT or ATF 100nm resolution magnascale. Rely on accuracy of the stepper motor and gear drive for wire position during the scan.

3. From Clive Field’s paper on FFTB wire scanners SLAC pub 6717

5. Wires are draped over the fork and weighted with small weights held on by tape Wires soldered to gold plated copper tabs using silver tin solder Machined terraces in macor fork provide locating surfaces for the wires

6. Wire scanner ceramic card for vertical scanner showing gold plated copper tabs for soldering wires. Solder is silver tin with no flux