Goals : 1- To conceive and build a self-supporting mechanical structure. 2- The concept can be extended to ILD and SiD 3- Keep cost as low as possible.

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Goals : 1- To conceive and build a self-supporting mechanical structure. 2- The concept can be extended to ILD and SiD 3- Keep cost as low as possible without deteriorating the performance. We have a baseline structure and we are improving on

Imad Laktineh (in behalf of Enrique Calvo Alamillo) Arlington 11 March 2010

Index: 1.Proposal for a DHCAL m3 module. 2.Numerical simulations for a m3 module. 3.Extrapolation of the m3 module philosophy for the ILD. 4.Cost for the mechanical structure of the m3 module proposed. 5.Conclusion. Index: 1.Proposal for a DHCAL m3 module. 2.Numerical simulations for a m3 module. 3.Extrapolation of the m3 module philosophy for the ILD. 4.Cost for the mechanical structure of the m3 module proposed. 5.Conclusion.

Mechanical structure assembled, parameters: 44 slots can host 44 detectors. Structure is composed of only 2 different kinds of pieces. Attachment is done using M8 screws, bolts between layer. Base support pieces and the manipulation fixations (By 2 bolts of M20) to fix on the stage A cover and/or a piece to position the modules. 1.- Proposal for a DHCAL m3 module.

Deformation and stress: Calorimeter supported on the 4 big bolts on the top. Charged with 44 modules of about 50 kg. Max. deformations are about 100 microns. The punctual max. stress it is only 74 Mpa, well away from the elastic limit of the material (stainless steel) 2.- Numerical simulations for a m3 module.

Deformation and stress with several suppositions: fixed on the one lateral side from the M8 bolt. Charged with 44 modules of about 50 kg. The max. reactions on the M8 bolts on the lateral side are: Fx= +/ N Fy= N Fz= +/- 300 N M8 bolt have the elastic limits, function of the material, between about N to N. And the pre-stressed forces are between 8200 N to N. 2.- Numerical simulations for a m3 module.

Deformation and stress with several suppositions: fixed on the one lateral side from the M8 bolt, rotated 90º. Charged with 44 modules of about 50 kg. 2.- Numerical simulations for a m3 module.

Deformation and stress with several suppositions: fixed on base side from the M8 bolt, rotated 90º. Charged with 44 modules of about 50 kg. 2.- Numerical simulations for a m3 module.

Deformation and stress with several suppositions: fixed on top side from the M8 bolt. Charged with 44 modules of about 50 kg. 2.- Numerical simulations for a m3 module.

Distribution propose for different DHCAL modules for the ILD: (Not take into account the modular Length of the GRPC or MICROMEGAS, for this proposal) 3.- Extrapolation of the m3 module philosophy for the ILD. Front view Lateral view

Distribution propose for different DHCAL modules for the SiD: (Not take into account the modular Length of the GRPC or MICROMEGAS, for this proposal) 3.- Extrapolation of the m3 module philosophy for the ILD. Front view Lateral viewFront view

Distribution propose for different DHCAL modules for the ILD: This situation can be solved with a composition of the previous solutions. 3.- Extrapolation of the m3 module philosophy for the ILD.

AISI 304 Piece tipe 1.: ~45 pieces. ~760 eur/piece (finalized) Piece tipe 2.: ~92 pieces. ~55 eur/ piece (Need to do holes/fillet on the milling machine) Bolts. M8x40 inox : ~1000 units. ~240 eur/1000 units Rest of elements: Bolts M20x supports pieces for the top and 4 bases: ~1000 eur/pack Total cost 760x45+55x = eur. Total cost 760x45+55x = eur. AISI 316L cost of the material need to be incremented about 10%. AISI S cost of the material need to be incremented about 40% -100%. 4.- Cost for the mechanical structure of the m3 module proposed.

Structure for a m3 module: Due to the standards thinness of the plates. The prices are much lowers in other kinds of stainless steel (316L or may be 310 or 310S). Only 2 different kinds of pieces to produce. With a minimum of machine operation on each piece. Prices and times much lowers. Very rigid structure, on different scenarios. ‘Auto-portant’ structure. DHCAL for the ILD: Can be adapted with the same philosophy to different modules dispositions. 5.- Conclusions.