measurement 1 -string
intermediate (smaller) chamber - 2144 (mm) circumference,  measured half circumference 1072 mm 
outer (larger) chamber - 2160 (mm) circumference, measured 1/4 circumference 540mm

measurement 2 - foil tape
intermediate (smaller) chamber - 2156 (mm) circumference,  measured half circumference 1078 mm 
outer (larger) chamber - 2172 (mm) circumference, measured 1/4 circumference 543mm

Difference from centre to flat surface on outer chamber is 344 mm on drawing -> say 346 mm radius -> 2174 mm circumference
Part 620FBM600 from pfeiffer intermediate chamber 690mm diameter, 2168mm 

Measurements of parts of CARME frame to the target frame as a reference for target frame position.

Attachments 3+4 show clearance between CARME frame and target frame just below interaction chamber from inside and outside of the ring. Attachment 5 is clearance in same section but above interaction chamber

Attachment 6 - measurement between outer edge of CARME frame and inner edge of target frame - 165mm

Attachment 7 - measurements between outer edge of CARME frame and inner edge of target frame - 455 mm 

Attachment 8 - measurement between lower edge of CARME frame and lower edge of target frame - 1245 mm

Attachment 9 - measurement between top of VAT valve and lower edge of target frame - 233mm (left arrow), 216mm (right arrow)