August 4, 2005 rod meeting notes:

 General
 _______
  We settled on Tuesday, August 23, as the date for the rod workshop at
 Santa Barbara.
 
 
 UCSB
 ____
 
    Recently their chiller was not going low enough in temperature as the
 storage shed was too warm. The shed has since been air conditioned and now
 the chiller is able to go down to -28C.
 
    Proposed using ARCS data to flag bad thermistors so that they could be
 avoided in the module 1 and 3 positions (which are used to interlock the
 rods). [At FNAL the DCU values stopped giving understandable temperatures
 when we migrated to ARCS version 8. This is under study. We could also look
 at LT DCU measurements and, as a last resort, check thermistor values as
 part of the rod assembly process.]
 
    Would like to add module thermistor and cooling thermistor tagging to the
 as of yet undefined rod XML files.
 
    Proposed a change from average to median pulse height subtraction to
 minimize false flags.

###ditto for risetime.

 
    The latest burn-in consisted of 8 SS4 rods. DefAna results mostly okay
 but some false flags from the average subtraction method.
 
      3 new opens, 2 defective inverters
 
    Will create a separate (CVS?) branch of DefAna so we are not affected by
 changes made to DefAna by the TEC community.
 
      DefAna currently has a problem fitting rise times - too many error
      messages.

### DefAna had this problem so we took the fitting out a while ago.  But did a 
###head-to-head comparison recently and saw that the fitting is useful 
###even if slow and verbose.  If FNAL has input on whether or not to put 
###the fitting back in the procedure, please share it.

 
    Confirmed one case of error 230 on a solution 6 module. [Yuri: should
 disappear with the new Inter-connect card.]
 
    Rod sent from FNAL (#201) had APV's reading out in reverse order during a
 connectivity test?!

###see elog entry: http://boson.physics.ucsb.edu:8080/mrt/134

 
    On 2 rods laser set commands were issued without any I2C errors but the
 laser settings were unchanged. Fixed by power cycling. [Yuri: Should upgrade
 to the latest FEC software.]
 
    Thinking about grading criteria for rods. Basic idea is that each module
 should be at least grade B from the MRT burn-in. Not clear how to handle I2C
 or other errors.
 
 
 FNAL
 ____
 
    40 rods have been burned-in at this point.
 
    Testing new Inter-connect cards (option 7) recently brought back by
 Marvin Johnson.
 
       FEC software was NOT giving error messages when clock line delay
       exceeded 12ns.  Wim installed latest FEC software on SRT and started
       to see error messages. Option 7 rod now in MRT and the FEC software
       has been upgraded on this system as well.
 
    One rod had a module where 2 out of 3 of the lasers were apparently not
 working. Replaced the opto-hybrid and same 2 out of 3 not working. Replaced
 the inter-connect card and now none of the lasers are working. Still to do:
 replace the module.
 
    Will build 10 more (option 6) rods to reach a total of 50.