Muon PDT Commissioning Status

1
Muon PDT Commissioning Status

• Neeti Parashar
• Northeastern University
• for the
• DØ Muon Upgrade Group

2

• Which PDTs ?
• B and C-layer PDTs.
• All are 3 deck PDTs (72 wires, 3 Front_End
  Boards, 1 Control Board).
• On east side, on the top.
• PDTs 111, 121, 131, 211, 221, 231.
• PDTs Readout
• The above group of 6 PDTs.
• PDTs 131 and 231 read before.
• Noticed synchronization error.
• ? Crossing numbers mismatch.
• Critical issue
• Resolve this sync. Error.

3
PDT Front_End and Readout Setup
FEB
1
CB
Muon Readout Crate
2
PDT
3
MFC
MRC
VBD
VME
Front_End System
A
B
1
12
. . . . . . . . . . . . . .
1
FEB
CB
PDT
2
3
Trigger Framework
Source of all decisions
Front_End System
4

• Synchronization Error
• Every other Turn number and crossing number was
  0xFFFF, as monitored by the Readout Crate
  Software.
• Steps taken to address the problem
• Sten had to change some jumpers on the Control
  Board (Not an issue).
• He adjusted the appropriate setting of the
  transmitters and receivers on the cable, without
  which a turn no was lost every 5 sec.
• Solution Change the hardware equations for CPLD
  to accommodate the propagation time of the new
  frequency multiplier.
• Critical issue
• Resolve this sync. Error.

5

• Tests done
• Pulser data was run on these 6 PDTs, with a fixed
  crossing and turn no. from the TFW.
• Result No Synchronization error noticed.
• Other jobs
• Some changes have been made in the Front_End
  Readout code, wrt L3 data format, L3 transmission
  and 1553 multiblock transfers.
• The CBs are set to communicate with the high
  speed UART rate of 2.5 mB.
• There was a software downloading problem, but
  fixed.
• MuoExamine revised to dump events with errors.

6

• What next ?
• Readout the 6 PDTs successfully, without errors.
• Everything needed to begin the test is in place.
• Use L3 filters on the data for hit
  reconstruction.
• Installation Progress
• 12 more B and C-layer CBs have been installed.
• All are on the east side, vertical side.
• Sufficient gas available to fill these, but the
  process shall halt till we have read the group of
  top 6 PDTs.
• 6/12 have been tested with pulser, others in
  progress.

7
Plans for the next month

• Read the 6 top PDTs successfully, without any
  errors.
• Readout the side 12 PDTs.
• Readout 18 Central East side PDTs.