R=34.4mm  R=49.5mm

Dear Committee,
In the NIKHEF-site-review-meeting the amount of glu for the BOL chamber was discussed. Here are the actual numbers. These numbers depend on several factors and therefore can vary by typical 10% from rope to rope.

For the 'side ropes', two on each tube, we use Araldite 2011:
 * 400ml in total (all side-ropes combined)
 * 36ml/m2 (all side-ropes combined)
 * 0.55ml/m for each side-rope.

For the 'central ropes' between the tubes we use Araldite 2019: 
 * 384ml in total (all central-ropes combined)
 * 35ml/m2
 * 1.08ml/m

For the spacer we use DP490. Between the spacer and the tubes we have a glu
thickness of approximately 0.5mm.

Recently, inspired by the discussion on the (negative) deviation of the multilayer distance measured in the tompgraph, we measured the crimp of such a glu-gap. For a 0.5mm gap we found an effect of at most 5um only. This amount corresponds to the typical value of 1% crimp, usually quoted for this type of glu. 

This seems to rule out the hypothesis that this crimp causes the multilayer-distance-deviation; we will investigate the hypothesis that the 'horizontal surfaces' of the crossplates deform during gluing.

Best Regards,
		Marcel Vreeswijk