Minutes of the Forward Tracker Upgrade meeting, Daresbury 8/6/99 ================================================================ Present ------- Tim Greenshaw, Graham Houghton, Scott Kolya, Gary Markey, Girish Patel, Dave Sankey, Graham Stokes. Actions from previous meeting ============================= Graham H ======== Orders ------ Delivery of Nomex panels expected by end of June. Graham H and Gary will travel to Belgium next week to test the panels by ``dry fitting'' all the PCBs (on 0.8mm FR4). Delivery of circular PCBs expected end June. SpemCo expect delivery of 0.5mm FR4 by 14th June. Final samples (on 0.8mm FR4) expected next week. The last samples still had small problems with the thin tracks at the outer edge of the PCBs. It was suggested that the final PCBs be inspected at the factory before shipping to ensure the earliest possible identification and rectification of any remaining faults. Sample side walls have now been received. The rounded corners have been removed using two methods, laser cutting and using a router. The latter results in a cleaner edge and will be used for production of the sidewalls. Delivery end of June. Delivery of crimp pins due 11/6/99, diameter confirmed as 1.585 mm. Delivery of square connectors due 18/6/99. Derrick will construct a small jig to facilitate connection of these to form blocks which can be more easily attached to the crimp pins. The remainder of the Noryl blocks are due on 18/6/99. All connector PCBs have been delivered. The dowels are arriving today (8/6/99). Schedules --------- The schedule foresees completion of the construction of 5 new planar chambers by February 2000. The difficulty of the installation task that we face during the upgrade was stressed. Good planning and preparation are a must! John Morton will visit DL on 10/6/99 to discuss the FT installation procedures and aspects of the planar testing procedure. A meeting dedicated to testing and installation procedures is necessary. This should include a detailed run-through of the entire installation procedure to identify all tools needed and all preparatory work that can be done prior to the installation period. Action ------ Graham to keep an eye on progress with deliveries and to discuss inspection procedures with SpemCo. Tim to organise Installation and Testing meeting (target date 5/7/99). Tim === Murrough Landon has expressed hiw willingness to work on the HV control and monitoring software. Measurements of a Noryl block made using the Liverpool coordinate measuring machine were shown. These show the blocks are generally within specification, with occassional larger deviations. This needs checking. Action ------ Tim to talk with Guenter Eckerlin about ``new'' HV control and monitoring scheme. Tim to get more Noryl blocks measured. Gary ==== Gary has produced a document listing the infrastructure required at DESY, indocating who has agreed to supply what. This may be accessed from the FTupgrade home page or directly via: http://hep.ph.liv.ac.uk/~green/ftupgrade/notes/instalinf.txt It turns out that the difference in height between the surface table necessary for the dismantling of the FT and those for the assembly of supermodules containing new planar chambers is minimal, hence only three surface tables are equired. Gary has found reasonably priced tables and will purchase three of these. He will also buy a surface made of aluminium honeycomb for one of these to check that it meets our requirements. If this is the case, surfaces for the reamining two tables will be bought. These tables can be used at DL, and are light, so can easily be transprted to DESY for use during the installation. Action ------ Gary to purchase and study surface tables. Don === Don could not come to the meeting. It was not clear whether Don had organised the shipping of the CAEN master crate to DL yet. Drawings of the pre-amp covers have nw been found. The desirability of organising counterweights to ensure that the centre-of-gravity of the modified FT is close enough to the pivot points when it is on the rotating mechanism was stressed. Action ------ Don to ship CAEN crate to DL. Don to chech suitability of green frame for wiring FT, do parts of I beam have to be removed? Graham H to investigate producton of aluminium pre-amp covers. Graham S to look at possibility of attaching counterweight to front FT suspension point (front feet). Derrick ======= Derrick could not come to the meeting. Dave reported on the progress with the order for the 3 CAEN pods. This had foundered on problems such as the value of the order being above the £2000 limit at which tendering is required by RAL. Action ------ Derrick to chase up CAEN order. Girish ====== Girish reported that he had been in contact with Klaus Wacker. H1 does not yet have the framework set up to get an ``upgrade'' version of H1sim going yet. Girish has also had a look at the possibility of streamlining some of the cluster finding software. Action ------ Girish to talk to Christoph Grab about Upgrade H1simm including simulation of new beamline. Chamber Production ================== Gary told us that problems with the adhesives for the planar chamber production have been solved. The glueing of the second face of the planars to be attached can be done using araldite and a cartridge gun. This ensures no drips penetrate the chamber. The wire tension testing apparatus is now functioning thanks to the use of different magnets. The crimp tools have now all been modified, but final tests await the arrival of more pins. The remaining nylon blocks used to support the chamber during glueing are being manufactured. The perspex gas box for chamber tests is being completed. Inspection and HV tests of 0.5mm FR4 PCBs must still be done. Action ------ Don to supply upper and lower limits of wire tension. Gary to organise inspection and testing of 0.5mm FR4 PCBs. Positioning of additional two planar chambers ============================================= Graham S managed to produce drawings (in less than 24 hours!) showing the two additional planar chambers ``back to front''. This allows a reduction of about 22mm in the gap between the two new planar chambers within supermodules 0 and 1. This is worth having and will thus be done. The new chambers will be oriented at 90 degrees. Graham's work highlighted a small problem with the installation of the new planars. These will foul an ``O'' ring mouting on the central tube of the tank (at the inner radius of the planar). The ``O'' ring is no longer required so 1 or 2mm of this mounting can be removed during the installation procedure. Graham will design a thin aluminium support to connect the reaminder of the mounting with the inner radius of the planar chamber. New dowel holes will have to be drilled in the Nomex panels to ensure accurate location of the chambers w.r.t. one another. Action ------ Graham S to design support for additional planar chamber at outer radius, support at inner radius and determine position of new dowel holes. Test procedures =============== Dave reported that the test rig is now at DL and is largely complete. He proposed that a complete test be done using the old Manchester prototype chamber. This will highlight remaining problems. Still needed are: gas, feedthroughs, FADC interface cards, pressure regulator, flow meters, bubblers, CAEN plus pods. The suggested date for a first test run was 5/7/99. Action ------ Tim to get gas (90:10 Ar:CO2). Terry to get 'scope. Dave to get FADC interface cards (inc. one for Scott for Manchester tests). Derrick to get pressure regulator, flow meters etc. Derrick/Don to organise CAEN HV. (Scott mentioned that as a fall-back solution a CAEN may be available from Manchester and that they probably also have flow meters and bubblers that could be used.) Next Meetings ============= The next FT upgrade meeting will be on 20th July at Daresbury. Tim will organise an intermediate``Test and Installation'' meeting around 5th July.