BML chamber assembly

Maria Curatolo

LNF/INFN

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Granite Table Granite table (on 3 feet)

flatness20m over the total surface(4500*2500 mm2) Temperature controlled (8

sensors attached to the granite) T=23.51C (room)

Humidity control (room) H=(50 5)%

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Granite table map

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Jig measurements Combs measurement summaryAv. pitch (all combs):

30.0353 0.0001 (RMS) mmRMS of Residuals (with Av. Grid):

2.9 m (all combs) 1.9 m (best 7)Av. Y-coord. (all combs)

121.7260.009 (RMS) mm 2.7 m (best 7)

Precision tower (with interfaces) measurement summary (see table)

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Combs

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Precision towers

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Precision towers

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Jig assembly procedure Granite ruler for correct alignment of the

reference side towers and comb reference blocks

Shimming 30 m under all the intermediate comb feet for compensation of difference in diameter of tubes and endplug reference surface

Orthogonality of outer comb side B to the line of the reference side towers granite ruler and square

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Jig assembly procedure

Parallelism of outer comb side A to outer comb side B equal distance between them at the two extremities , near ref towers and near non-ref towers

Same method for the intermediate combs

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Jig fixation to the granite table Comb fixations to the granite table

allow for sliding in z-direction (fixed point at the ref side extremity)

Comb movement in x-direction limited to 50m in case of accidental clash

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Vacuum system realized in separate sectors (3 for every comb)

Very simple gluing machine (industrially treated for ant adherence)

Very finely adjustable speed crane Sequence of gluing steps minimizing

the number of tower interface changes

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Assembly steps

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Assembly steps

Frascati 21/7/2000 ATLAS - MDT Site ReviewMaria Curatolo L.N.F. / I.N.F.N.

Assembly table