Slice Status Status Update

(Aug.25, 2005)

 In the last couple of weeks we have finally managed to get the FED crate back up and running. This allowed us to take some data with the scintillator-based trigger. We could already see from the Peripheral Crate front-panel LEDs that LCTs and triggers coincided for both the target chamber as well as the chamber on the opposite site of the YE+2 disk. Together with a first course offline analysis this showed us that the Peripheral Crate timing was in a good shape and that a switch to the TrackFinder-based trigger would be appropriate. This, however, involves the introduction of substantial latencies in the trigger path. Most of the timing could be redone but the harcoded CFEB timing of the DMB prevented the CFEB data from showing up at the DDU in the next couple of data runs. Yesterday night OSU (Jianhui) reprogrammed all the SliceTest DMBs and UCLA (Dave) redid the timing. It was found that the extra 16BXs was a bit too much to get the timing done but that can easily be handled with a delay box (which was already foreseen in the set-up). I will consider this set-up the stable version and make sure that our computers will have seperate accounts through which this stable version can always be run for Run-Control, Local DAQ, Global DAQ, DQM and HLT purposes.

Regarding the software, I have sent out messages to the offline (hardware) analysis developers (Alex T., Jason M. and Slava V.) inviting them to introduce the software in the recently created CMS/EMU repository. Our OSU colleagues have requested a FEDcrate directory at the same level as the PeripheralCrate in our TriDAS/emu repository. I've set them up with the usual structure and added Stan, Jianhui and Jason to the list of developers. Finally, Stan and I have exchanged some emails on the various jtag approaches that exist in our peripheral crate. I have included Jinghua in these discussions as this is a highly relevant part of the HAL/Core implementation of the peripheral crate software.

best regards,
 Frank