Barrel 3 clamps showing gaps see next pics

Barrel 3 clamps showing gaps - see next pics for solutions. Trials with various types of packing were made at Geneva 27. 1. 03 clamp 6 LMTs Tapes slide along length in small gap. flange strap Large gap: tapes slide in any direction Gap 300400 um

Solution 1 : glue 180 um strips to inner recesses of clamp glue 400 um strip onto barrel surface (same effect as strap) 180 um strip clamp 6 LMTs flange strap 6 LMTs 400 um strip Advantage: every harness is the same

Solution 2 : glue 180 um strip to inner recess where there is a strap glue 580 um strip to inner recess where there is no strap glue 400 um strips onto inner radius of clamp either side of recess to stop LMT lateral movement clamp 180 um strip 580 um strip 6 LMTs flange strap 400 um strips Advantage: no extra work on barrel - Disadvantage: more material

Clamps for other barrels: no packing should be necessary except where there is a variation in LMT thickness and variation in strap thickness clamp 6 LMTs flange Recess 400 um + thickness of LMTs Recess thickness 6 LMTs of LMTs only strap Need to know strap thickness. LMT thickness is 1. 78 mm for 6 tape stack (this was measured maximum of samples of reject production tapes sent to UCL) A small radius on the inner corners of the clamp recesses may help clamping.