Spain@cern 2014 Jargon ! “Facility” ( or “hosting laboratory”) : e.g. : Fermilab , KEK , DESY , CERN , (ESRF) “Experiment” : • detector complex collaboration � “institute” • Labs : double role ?! Orders, please ! Tendering for stuff for Experiment � responsible institute Steps (@cern) : 1. Market Survey 2. Invitation to Tender Technology ? Innovation ?? Catastrophe ??? Experiment equipment is never routine ... even in case of a modest example.. like NA62 Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 1 /10
NA62 Gigatracker (GTK) 1/2 Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 2 /10
NA62 Gigatracker (GTK) 2/2 Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 3 /10
NA62 diverse : RICH - STRAW - LAV - decay (vacuum) tank Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 4 /10
EDMS No. : 1179892 IT-3807/PH/NA62 Invitation to Tender ANNEX to the Technical Specification for the supply of one vessel and its auxiliaries of the NA62 RICH detector drum 4 FINAL machining operations on ASSEMBLED drum 4 a flange arrest surface and centring tooth turning b O-ring groove turning(*) female cylindrical surface for reception of mirror g e turning support panel ? k - fixation holes for panel support blocks drilling(*) f general vessel assembly hole rear drilling & threading g male cylindrical surface for drum/drum mating turning(*) h various holes for fixation of mirror support panel drilling(*) l k holes for fixation of survey targets drilling l holes for locking of support collars drilling ( & threading) k' holes for fixation of survey targets drilling l' holes for locking of support collars drilling ( & threading) Operations g , k and l in one clamping (“A”). Operations a , b , e , f , h , k' and l' in one clamping (“B”). l’ e h k’ b f a Figure 1 : Imposed final machining on drum 4 . Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 5 /10
It is clear that the drilling of type “ l ” and “ l' ” (figs ..., ... and 1) may present difficulties of accessibility. Indeed, in the drawings, an alternative based on through drilling is proposed. Various through holes for bolting are not explicitly required to be drilled in the final machining phase. These are : • in the outer flange of the conical cap ; • in the front flange of drum 1 ; • in the front crown of drums 2, 3 and 4 , and they are highlighted with a question mark “ ? ” in figs....-1. Note, however, that their tolerances are not very comfortable. In the drawings, there is mention of non-specified diameters like D 23 (for the interface between drums 2 and 3) ; in general D n , n +1 for the interface between drums n and n +1 . The value would be such that a maximum amount of material remain whilst turning the “male” surface (operation “ g ” - figs. .. and 1) of drum n +1. Once its value established, the “female” surface (operation “ e ” - figs. ... and ...) of drum n can then be machined. This implies that the final machining of the drums shall be in this order : 4, 3, 2, 1. Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 6 /10
STEP 3 : ASSEMBLY of drum STEP 1 : ASSEMBLY of drum PORTIONS min. 1000 and min. 1000 ...BUT : very precise rotation alignment needed ! STEP 2 : FINAL machining operations on ASSEMBLED drum PORTIONS g k min. 1000 and l min. 1000 l’ e d f c k’ Figure 2 : Compromise solution (alternative sequence) for final machining . Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 7 /10
Call for tender Vessel of NA62 RICH : directory of drawings Drawings numbers : N62RIVS..... where the last 5 characters are in the tree entries The hyperlinks below point to CDD entries. If you want to use the (flat) archive of pdf files instead, then this directory is still useful, because the titles and drawing numbers are given. The CDD hyperlinks point to the most recent version. Such can be more recent than the version used in the Call for Tender. Refer to the archive of pdf files if you want to make sure of having the version used in the Call for Tender. General vessel view D0084 vessel assembly D0083 Conical cap conical cap D0047 PM spot test cover A0001 Drum 1 drum 1 - assembly D0054 drum 1 - bare drum D0055 drum 1 - front support collar assembly D0076 drum 1 - front collar welded sheet D0056 drum 1 - front collar bare sheet D0057 L beam (generic) anchor (generic) drum 1 - front support lateral ribbon D0058 Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 8 /10
calibrated He leak 3−way valve (commutator) pumped line disconnect point isolation valve wall temperature of DUT must be measured at various places KF50 KF50 flex50 D.U.T. HCV (high−conductance valve) high−conductance tunnel KF50 EV50 KF50 KF25 ISO 100 IV (isolation valve) (EH500) not all flanges detailed here (Edwards unit on chariot) KF25 EV He small backing pump 40m3/hr leak (E2M40) detector flex25 (vent) (provision for cold trap ... in case of need) P. Wertelaers − 08−Nov−2013 Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 9 /10
Spain@cern 2014 Piet Wertelaers 29 Oct 2014 page 10 /10
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