Minutes of FT Upgrade Meeting held on 11/5/99 at DESY ===================================================== Present ------- Don Clarke, John Dainton, Derek Darvill, Karsten Gadow, Tim Greenshaw, Derrick Hill, Graham Houghton, Gary Markey, John Morris, Girish Patel, Dave Sankey, Graham Stokes. Actions from previous meeting ============================= Graham H -------- Status of orders: Nomex panels ------------ Due to be delivered 21/5/99, Some delay possible because of problems with CAD file transfer. Different file formats being tried. Circular PCBs ------------- Final samples on 0.8 mm FR4 received and passed inspection. Delay due to non-availability of 0.5 mm double-sided FR4. Possibility of using 0.35 mm FR4 should be considered as this is more readily available. This requires that samples be obtained and that HV tests be repeated. In addition mechanical test are necessary to ensure that the thinner material can withstand the necessary transport and handling. Action: Graham H to organise samples on 0.35 mm FR4. Tim to do HV tests. Gary to do mechanical tests. Sidewall PCBs ------------- Delivery of samples next week. Connector PCBs -------------- Completed. Crimp pins and square connectors -------------------------------- Delivery due 4/6/99. Noryl blocks ------------ The company producing these failed to understand necessary ``handedness'' of the blocks despite being supplied with drawings of left and right handed designs. Half of blocks produced are OK, the other half will have to be re-made. Status of design work: All design work for planar chamber production now finished. Items completed since last meeting: Spacer collar for tank forward end plate. Radial adapter ring to allow planar to be attached to radial side of U channel. Gas manifold. FTD layout with 60 mm forward shift (note that the foot design will ensure that we have 10 mm in reserve here). Design effort still needed on: FTD feet. FTi 2 support structure. Feedthrough blanking plates. FTD/CTD inter-connector (this is to be designed and built at DESY, so we do not have to worry about it - Karsten Gadow) Gary ---- Chamber manufacture ------------------- Tests of the procedure for attaching the PCBs to the Nomex panels using vacuum bag technology have been done with the help of Derek Morrow. The results are satisfactory and resins for both the attachment of the circular PCBs and the side walls to the Nomex have been chosen. Purchase of the necessary bags and other materials will cost about 2000 pounds. Much useful equipment is available through RAL and DL. Gary is now satisfied with the crimping procedure. All tests to date have been passed and one satisfactory crimping tool produced. The remaining two tools are to be modified and tested. These tests cannot be done until Medelec deliver nore pins. The tension testing rig needs a different magnet layout. Chamber testing --------------- The first test is of the wire tensions following wiring of each cell. After completion of a chamber it is tested in air, does it hold volts? The chamber is then gassed up and each wire tested with a source and a `scope, are there pulses on all wires? Cosmic ray tests are then made with full DAQ to ensure that resolutions are OK. Longer term tests can be made on one chamber to study cell edge effects, signal propagation velocities (?) etc. Action: Don to specify wire tension tolerances. Derrick to find out accuracy of tension testing rig. Tim to clarify possible financial support for visit of John Morton to Liverpool/DL. Don, Ray Thompson and John Morton to check chamber testing procedures. Derrick ------- All necessary signal and HT cables for tests available with possible exception of ``twisted'' cables (which run from CDA to DAQ in H1) to ensure correct pin to pin connections for DAQ. The use of ``CELLO'' cables would ensure this. The cables delivered to DL from Liverpool could be just those needed. The requested additional trigger is nearly ready. The costs for a new CAEN HV system are as follows: Item Quantity Cost (pounds) Main frame 1 5125 Pod 3 4119 Optocoupler 1 995 Communications unit 1 995 Packaging/insurance 1 50 ----------------------------------------------------- Total 11284 ----------------------------------------------------- This is more that we can afford. The delivery time is 10 to 12 weeks, this is also more that we can afford! After the meeting a CAEN mainframe with optocoupler and communications unit were located (under boxes in Tim's DESY office). These are apparently in good condition. Action: Derrick and John to prepare order for requred three CAEN pods. To be purchased as spares for H1 etc. Dave ---- Test DAQ system will be ready for end of May (the van has been booked for then to take it to DL!) Outstanding problems are: Only 1 FADC working at moment (Scott is looking at the other 2). NIM gate generator needed. Action: Terry to look for NIM gate generator at Lancaster (check necessary spec. with Dave). Tim to do same at Liverpool. Infrastructure for installation at DESY ======================================= Don took Graham H, Graham S and Gary on a tour of the H1 Hall and DESY yesterday. They now have a reasonable idea of what the working environment will be like for the FT installation. Karsten Gadow ensured us that we will have somewhere to work next year, but was unable to say where as yet. Hall 5 will probably still be blocked by HERA-B; we may even have to go off site. This is in the hands of the DESY directorate! After the meeting Karsten showed us the clean room we will have. This has an area of about 6 x 10 m^2, with some storage space in addition. There is an internal crane which operates up to a height of 2.8 m and the roof can be removed to allow the lowering of the FT into the clean room. DESY will not be able to provide surface tables for us, we must organise them. We will need (at least) four: one of height about 80 cm onto which the (cleaned) FT can be lowered and three of more comfortable height for working on each of the supermodules. We will also need storage space for the new planars, it was suggested that the ex-BaBar tent could be brought over and used as additional space. Karsten warned us that the maximum load that the clean room floor can take is 3000 N per floor panel. We also have to provide all clothing etc. needed for the clean room. We looked at the ``Green Frame'' which will be used for transport of the FT. The ``Aluminium (Derrick?) Frame'' for the support of the cables is also available. Action: Karsten to provide drawings of clean room. Don, Gary and Graham to work out spec. of equipment necessary for installation and discuss with Karsten. Don to check that Green Frame suitable for cabling the FT and to organise mods if this is not the case. Don to organise repair of rotating mechanism. Graham and Gary to think about possibility of temporarily attaching some kind of weight to FT after removal of radial and foremost tank segment to ensure that c. of g. is in correct place for rotation of tank after installation of new chambers. Status of FTSIM =============== Girish outlined the status of FTSIM. The new planars are included but the foremost radial has yet to be removed. The simulation works to the level of producing hits in the chambers and doing the L4 monitoring. Girish has installed FTSIM at Lancaster, so work on the pattern recognition is now possible. Action: Girish to talk to Klaus Wacker about getting FTSIM to H1 release. Other Business ============== HV control and monitoring work should start as soon as possible to get the FT into the Eckerlin scheme. This should include readout of the current monitors in the system. In addition to their usefulness for us, the results should be made available to the machine group to help them with tuning HERA. CDA cabling spec. for FT and FTi needed for about September (Karsten). Measurements of elements of the planar chambers may be possible to about 1 micon accuracy using the Liverpool coordinte measuring machine. The plastic pre-amp covers on the FTR tank need replacing with aluminium versions. We do not have enough FADC adapters for the additional two planars we hope to build. We will also need to modify the radial pre-amps if these chambers are installed. Action: Tim to talk to Murrough Landon about HV control and to talk to Liverpool CMM experts. Don to work on CDA cabling spec., to look for pre-amp cover and to organise construction of additional FADC adapters. Graham H to include modification of the radial pre-amps in the shutdown schedule.