ATF 2 Magnets Information on top of the

ATF 2 Magnets Information on top of the QC 3 style quads that will become QD 0 and QF 1. For David Urner. 3 rd July 2007 Cherrill Spencer, SLAC Member of ATF 2 Magnet Team 3 rd July 2007 Cherrill Spencer, SLAC. Info on top of FD ATF 2 quad for D. Urner 1

ATF 2 Magnets Revised core model showing enlarging the “QC 3” quad’s bore diameter Trim coils that went in the slots will be removed. Place a very flat and precise thickness shim in each split plane to “explode” the quad and enlarge the bore diameter. Shim will be low carbon steel, ground to 0. 0005” flatness- are being made. 3 rd July 2007 Cherrill Spencer, SLAC. Info on top of FD ATF 2 quad for D. Urner 2

ATF 2 Magnets We are making detailed drawings which we lack of this quad- fab’d in Russia about 17 years ago Here’s a quad being measured in April. This is the terminal end. You can see the orange LCW hoses coming out of blocks that attach to the coils, they stick up vertically. THESE WOULD BE IN THE WAY OF YOUR 50 cm long mounting plate put on top. Nothing else is in the way. 3 rd July 2007 Cherrill Spencer, SLAC. Info on top of FD ATF 2 quad for D. Urner 3

ATF 2 Magnets Here is a photo of the top surface of an ATF 2 FD quad before modification Orange steel core is 45 cm long. This end has the LCW hoses that attach to the coils Light green trim coils will be removed Tooling ball holder will be removed Power terminals are not in the way 3 rd July 2007 This end is quite empty Cherrill Spencer, SLAC. Info on top of FD ATF 2 quad for D. Urner 4

ATF 2 Magnets We can replace the straight hose fittings with 90º elbow ones 2. 5 cm 3 rd July 2007 Cherrill Spencer, SLAC. Info on top of FD ATF 2 quad for D. Urner This fitting is 2. 5 cm away from end of core and ~1 mm below top surface. We can replace it with an elbow fitting so LCW hose sits horizontal rather than vertical. 5

ATF 2 Magnets Compare the two ends of the FD quads: one clear, one not Core is 45 cm long, Urner et al need to mount a plate ~50 cm long on top of quad. Spencer thinks this can be done. KEK alignment fixtures need to be integrated in this scheme. All trim coils like this will be removed. These posts are to hold terminal covers- covers can be redesigned. This straight fitting will be replaced by a 90º elbow one 3 rd July 2007 Cherrill Spencer, SLAC. Info on top of FD ATF 2 quad for D. Urner 6

ATF 2 Magnets New drawing of modified FFTB quad core- with new shims 45 cm 7. 171”= 18. 2 cm 3 rd July 2007 Cherrill Spencer, SLAC. Info on top of FD ATF 2 quad for D. Urner 7

ATF 2 Magnets Here’s photo of non-terminal end poletips (ignore the drooping vacuum pipe!) More space here for your retroreflectors These 4 trim coils will be removed and shims put in at these split planes 3 rd July 2007 Cherrill Spencer, SLAC. Info on top of FD ATF 2 quad for D. Urner 8