NA62 Gigatracker (GTK) 1/2 Spain@cern 2014 Piet Wertelaers 29 Oct - - PowerPoint PPT Presentation

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

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NA62 Gigatracker (GTK) 1/2

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NA62 Gigatracker (GTK) 2/2

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NA62 diverse : RICH - STRAW - LAV - decay (vacuum) tank

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EDMS No. : 1179892 IT-3807/PH/NA62

Invitation to Tender ANNEX to the Technical Specification for the supply of one vessel and its auxiliaries

• f the NA62 RICH detector

drum 4 FINAL machining operations on ASSEMBLED drum 4 g e h b f a k’ l’ ? k l a flange arrest surface and centring tooth turning b O-ring groove turning(*) e female cylindrical surface for reception of mirror support panel turning

• 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(*) 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”).

Figure 1 : Imposed final machining on drum 4 .

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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

• n 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 D23 (for the interface between drums 2 and 3) ; in general Dn,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.

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and

• min. 1000
• min. 1000

STEP 1 : ASSEMBLY of drum PORTIONS

STEP 3 : ASSEMBLY of drum

...BUT : very precise rotation alignment needed !

k l g

and

STEP 2 : FINAL machining operations on ASSEMBLED drum PORTIONS

• min. 1000

e f d

• min. 1000

c k’ l’

Figure 2 : Compromise solution (alternative sequence) for final machining .

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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

D.U.T.

He leak detector (vent) not all flanges detailed here

small backing pump

(isolation valve)

KF25 high−conductance tunnel KF50 flex50

(high−conductance valve)

flex25 (provision for cold trap ... in case of need) wall temperature of DUT must be measured at various places KF25 IV 40m3/hr

(EH500) (E2M40)

(Edwards unit on chariot)

KF50 ISO 100 EV50 EV KF50 KF50 HCV

• P. Wertelaers − 08−Nov−2013

isolation valve

calibrated He leak

disconnect point 3−way valve (commutator) pumped line

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