MVD installation, fall 2004 Pads only:

Work done with IhnJea Choi MVD after successful installation Beam pipe is pushed to the center with a plastic block (South side)

Initially, the South Glinks would not lock. Traced to bad 10MHz clock on backplane North crate backplane South crate backplane Caused by one bad DCIM module - removed Now everything reads out as before

We also rebuilt the test system in the 1008 side room, with 3 MCM’s

Safety improvements: 2) Made new piece of false flooring Getting up to the lift table meant going op 3 20” steps behind the MVD rack. No floor in that area 1) Made 3 removable 10” steps 20” MVD rack

Problem: AMU cell numbers, and event counters, go out-of-step during multi-event buffering. This is a problem in the ALM (address list manager) FPGA code. Can we reproduce the problem? Yes: put 5 fast triggers in the GTM file, or Insert Imran’s fast random triggers into the Phenix trigger system Not quite equivalent… Problems show up after 5-10k events, and accumulate. Modify ALM firmware: no more errors using the GTM triggers, but still errors using the random trigger: some progress... I wrote Perl scripts to quickly look at the relevant data words

Ongoing work IhnJea will not be back until January 2005, but he has some time to work on this this fall. He can prepare a few modified versions of the ALM FPGA code for testing. I can run the system from here (with a phone call to John Haggerty to plug in the random trigger), and try out the new codes. Unfortunately there is no deterministic way to find the race conditions that are the cause of these problems. Keep on plugging away…