From holodenko@mail.ihep.ru Thu Mar 25 10:31:03 2004 Date: Thu, 25 Mar 2004 13:57:45 +0300 From: ???????? ????????? To: Richard Bates Cc: Alexander Vorobiev Subject: Re: spines Dear Richard, Here is some extraction from the Project. Hope The steps will more less clean. There are a few the bottle necks, and of course, as usually sometimes ,appies in unpredicted places... >From my point of view, part of them is marked by green. Additional, we need some part of spare components, for spine reparing (that did not included into Project!!!) For example, today I send to CERN 15 metalized spacers for reparing... And from time to time we send components to CERN for repairing.( But taking them from current our stock for production, so at last we will have a deficit!!) Practically, according to experience, we need something like: Additional ceramics and TPG sets (for current repearing) The estimation based on: - Some experience during repearing (10% losses of elements 2,3,8 and both kind of spacer); - Some additional stock of components (TPG, other components, at level (3%)); Quantity: Elements 2,3,8 and both kind of spacer: - 13 % (10%+3%) Elements 4, 5,7 -3 % TPG -3 % (for repearing, NIITAP only) Type of element TPG 2 3 4 5 7 8 Spacer both type (set) Cost of manufacturing (per units), $ 24.27 1.54 4.0 1.54 3.29 2.25 4.0 3.095+2.43=5.525 % of spare elements 3 13 13 3 3 3 13 13 Number of spare elements 60 263 263 60 120 81 263 263 Subtotal cost 1456.2 405.02 1052 92.4 394.8 182.25 1052 1453.075 Material: (Estimation based on values included in Project 2731) TPG TPG (in sheets) - 75 ( 2480 (1130+750+600))* 0.03=75 (34+23+18)) TPG areas is: (145x25)*34+(143x25)*23+(80x25)*18=241475 mm2 =2414.75 cm2 AlN, Al2O3 (Estimation based on values included in Project 2731) AlN (in sheets) - have been supplied by collaboration. Al2O3 (in sheets) Regards, Anatoli ----- Original Message ----- From: "Richard Bates" To: Sent: Wednesday, March 24, 2004 7:20 PM Subject: spines > > Dear Anatoli, > > To help me understand the production of spines I would be very greatful if > you could outline the different stages of production that are preformed to > produce the spines, including where they take place. Could you also > indicate the time that each stage takes to produce a spine or batch of > spines. If the spine production rate can be increased, as is > underdiscussion, which are the stages that you consider would be the > bottle necks and require the most attention. For example is the TPG > production at present a limiting factor or is it the the TPG coating or > maybe the construction of the component parts into a spine. > > Thankyou very much for this information > > yours > > Richard > > > > -- > -------------------------------------------------------------------------- ----- > Dr. Richard Bates > Physics and Astronomy Department Tele : +44 141 330 5882 > Kelvin Building Fax : +44 141 330 5881 > The University of Glasgow Email: r.bates@physics.gla.ac.uk > Glasgow WWW: http://ppewww.ph.gla.ac.uk/~batesr > G12 8QQ > -------------------------------------------------------------------------- ----- > > > > [ Part 2, Application/MSWORD 46KB. ] [ Unable to print this part. ]