1 / 20

EMTiming Project Completion Issues Dave Toback Texas A&M University for the EMTiming group

EMTiming Project Completion Issues Dave Toback Texas A&M University for the EMTiming group July 2004 Installation Readiness Review. Outline. Max has shown that the electrical design and strategy is working well I’ll leave Installation issues to Rob in the next talk. I’ll focus on:

zeus-alston
Download Presentation

EMTiming Project Completion Issues Dave Toback Texas A&M University for the EMTiming group

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. EMTiming Project Completion Issues Dave Toback Texas A&M University for the EMTiming group July 2004 Installation Readiness Review

  2. Outline • Max has shown that the electrical design and strategy is working well • I’ll leave Installation issues to Rob in the next talk. • I’ll focus on: • Remaining management issues • Transition board mechanical problems and plans • Mapping changes for the CEM and implications hepr8.physics.tamu.edu/hep/emtiming/

  3. Equipment to be Installed in the Fall • CEM harnesses: • 48 Wedges total • 4 already installed • Remaining 44 are done, tested and ready to go • TB’s and ASD’s • 27 board pairs are electrically sound and tested • Need more of these… (more on this) • Long Cables: • Tested and installed, nothing to do • TDC Crate and TDC’s • All in and working (will need 2 more…)

  4. Transition Boards Mechanical Problems • 16 TB installed in the PEM, 2 in the CEM: working well, no failures • During installation of CEM it was discovered that there are mechanical flaws with the TB • Slightly too thick • Slightly too tall • Holes for front panel mounting not quite in the right spot (off by 1 mm) or the right size

  5. TB’s continued • Attempted to fix the boards by milling the long side. Unfortunately, they were over-milled and are now slightly too short and out of spec • still fit ok and do not fall out • Bent front-panels in the process • Peter Wilson and Mike Lindgren did a review • It was decided that it would be best to re-make these boards at FNAL using Marco’s drawings • We won’t touch PEM unless we absolutely have to, but want have enough TB’s to swap if needed • Marco has agreed to this, and is working with Tom Wesson/Bob DeMaat to get the e-designs transferred and checked • Bob estimates we can have the re-made boards done by end-of-August.

  6. Some good news on TB’s • One of the primary costs of the TB’s are the bulkhead boards (3 daughter boards. • Bob’s team found they could safely remove all 3 boards in ~15 minutes. Straight-forward to re-install • We can thus re-use all of these boards • Will build extras just in case (more later)

  7. Mapping Issues • It was decided that the mapping design for the CEM needs to have all timing lines go into the same crate as the energy readout (ADMEM) lines. • New design in detail at: http://hepr8.physics.tamu.edu/hep/emtiming/cablemap/

  8. EMTiming Hardware

  9. Implications of New Requirement • Add a TB/ASD to each CEM rack • Total of 8 new board pairs • Not enough from spares => Build new (more on this later) • Power and space requirements are ok (PJW) • Need an extra cable to go upstairs • Use the spare cables installed in 2003 • If we have channel failures on TB/ASD/Cable we can move lines within the boards: lots of spare lines • If the long cable goes bad, we can move a spare from the PEM

  10. Implications of New Requirements Cont… • Need 2 more LVDS TDC’s • Eric James/Myron tell me there are easily two available • Need TDC slots in the crate • Nothing else in the crate so we are ok from space and power requirements • Will need to re-label and dress long cables at TDC crate • Should be quick • New online readout mapping needs to change • Done and documented in the note

  11. Making more ASD’s/TB Have negotiated an agreement with Marco/INFN & Rob/Bob/FNAL for who will build what (see web site) • INFN will make 10 more ASD/TB (8 + 2 spares) • Ordered • First half of ASD’s should arrive in late July • Rest in mid-September (need parts) • FNAL will provide same parts as last time (connectors, front panels) • Most are in stock, FP have 4 week lead time; to be ordered this week. • INFN will make 30 more bulkhead boards (3 bulkhead boards/TB x 10 new) • Ordered • Scheduled to arrive mid-September • FNAL will make enough make TB’s enough main PCB to cover the CEM + the extra 10 needed • Get rest of drawings this week • Design will take ~2 weeks • Lead time for fabrication/stuffing <3 weeks • Parts to be ordered this week • Completion scheduled for end-of-August

  12. Making more ASD’s/TB Cont… • Final assembly of TB/ASD’s will be done at FNAL • connectors, front panels etc. • All final testing will be done by TAMU at test-stand • Use the same procedure that we used last fall

  13. Contingency Plans • The shutdown is scheduled to go from August 23 - December 6 • Things which could go wrong that we have specifically planned for: • Cables/boards don’t work • Something gets broken during the installation • TB’s don’t show up on-time • ASD’s don’t show up on-time • Top and bottom wedges are non-trivial to install

  14. Cables/Boards are broken • All equipment is tested at the teststand upstairs (procedures on the web) before installation • If an ASD/TB/TDC breaks we swap it with a spare • If a line in a long cable goes bad breaks, switch to spare line • If a long cable goes bad, move to a spare from the PEM • If a CEM splitter-line connector goes bad can crimp on a new LEMO connector, or CEM splitter board. • Worse case scenario is the cable goes bad; run a new line.Lots of spares already exist.

  15. Something gets broken during installation • The procedure for this was agreed upon and put in writing for last shutdown • http://hepr8.physics.tamu.edu/hep/emtiming/installation/ • Summary Overview: If ANYTHING breaks, the installation stops. Only once it is understood what caused the problem, the procedure is corrected if needed, and SPL’s and operations agree it is safe to continue, do we resume.

  16. TB’s/bulkhead boards don’t show up on-time • If the TB’s or bulkhead boards don’t show up at the beginning of the shutdown, we will install the harnesses anyway; install the TB’s and dress when they arrive later in the installation. • If they don’t show up by November 1st we will begin purchasing 50 Ohm LEMO terminators to put on all the channels (~1000) until they arrive. • If they haven’t shown up by October 1st we will evaluate whether we should plan to purchase early

  17. ASD’s don’t show up on-time • If the first half of the ASD’s don’t show up by the beginning of the shutdown, we will install the harnesses anyway, hook up to the TB’s and ASD’s we have; install the rest of the ASD’s and dress when they do. • For the crate with 1 ASD: Each wedge gets 8x2 lines into the TB. Instrument 0,1,2,3&4,5&6,7,8,9 (& indicates one side only) • Give 6/10 wedges fully instrumented, the other 4 have turn-on curve and bleed-through problems • If they don’t show up by November 1st we will begin acquiring (purchasing?) 50 Ohm LEMO terminators to put on all the channels (~100) which don’t have an ASD termination.

  18. Top and Bottom wedges • It is believed that with the arches out (will coordinate with CPR who needs this anyway) that we can do the bottom wedges straight-forwardly • No known roadblocks with installing the top, except that it’s hard • We will start the installation in the second week to maximize the amount of time for creative solutions if necessary

  19. Pictures PEM CEM Readout path Teststand ASD TDC TB

  20. Summary • Additional ASD’s & TB’s with improved mechanical specs will improve the robustness of the system • Both are in progress and on schedule to be ready for the installation • No known road-blocks. • Everything thing else ready for installation in August

More Related