94 LVPS Packages mounted 425 from the frontend electronics.

1
PDT Low Voltage P.S.

• 94 LVPS Packages mounted 4-25 from the
  front-end electronics.
• 4 modules per package.
• 5V -5V Digital, 5V -5V Analog 18
  A 1A 18A 18Amps

2
LVPS Connections
3
LVPS Testing

• Procedure (on d0mino) /RunII/home/room2/diehl/muo
  nup/1999/lvps_test.txt
• Disconnect front-end electronics from Renwa card
• Check wires connections at both ends
• Measure load internal resistance
• Power up with a simulated load adjust voltages
  to read proper voltage output
• Reconnect electronics with FEB cards
• Typical malfunctions (Alonso G.)
• Loose wires
• 60
• Wrong connections in wiring-esp. sense leads
• 40
• Bad power supplies
• 9 of 88 Power supplies
• Bad soldering on the lead wires of the power
  supplies
• 5 of 88 Power supplies

4
LVPS Status

• Total 94 Supplies
• Installed 90 (not yet 105, 106, 145,146)
• Completely Connected 78 (many in the A-layer
  dont have a power trunk yet).
• Operating 66 (Bottom B C-layer not operating,
  incomplete electronics)
• Power Supply Operation
• A couple modules have been replaced. In
  retrospect, the problems have likely been related
  to the modules A.C. connections, rather than to
  component failure.
• Plan to Finish
• Install 4 remaining LVPS after EFs are closed.
• Victor M. has material to make long power trunks.
  Install in 2-wk shutdown.

5
PDT High Voltage

• 94 PDTs each have two H.V. inputs.
• Operating Voltage
• On mini-pdt (small length)
• Wire 4.65 kv Pad 2.3 kv
• On the real thing (not finalized?)
• Wire 4.7 kv Pad 2.3 kv
• Status of MCH2
• 2 Crates, 47 pods
• All pods installed
• All pods have been
• operated
• Pods not tested for
• extended periods

6
PDT Business End

• Service Cards
• 3 Types
• Recently purchased spares for A-layer
• Now have sufficient spares of all kinds.

7
HV On Detector

• POD to PDT Map
• Sensible division of PDTs to Pods
• Averages 2 PDTs per pod
• Large A-layer PDTs each have own pods
• Bottom A-layer PDTs ganged 3/pod
• Quiet Bottom C-layer PDTs ganged 4/pod
• See file http//wwwd0.fnal.gov/hardware/upgrade/mu
  on_upgrade/Image3.gif
• Tested recently to make sure pod matched the
  appropriate Reynolds output.
• 6 PDTs (BC-layer top east, octant 1) have been
  operated on a couple of gasses since last summer.

8
HV Pod Map
9
HV On Detector

• 70 (-3) PDTs are connected to HV pods.
• 3 PDTs (243, 135, 141) are disconnected because
  of broken wires.
• 67 PDTs OK at 200V on wire and pad
• 36 PDTs have been brought up to full voltage.
• Plan
• Upon gas flow bring the PDTs to full voltage.
  Measure/track beam-off currents.
• Finish cable installation in the 2 week shutdown
• Repair/jumper cells with broken wires on access

10
Summary

• LVPS
• 90/94ths installed
• 66/94ths operating
• No evidence of LVPS pod failure
• Finish during the 2 wk shutdown.
• High Voltage System
• Infrastructure MCH2 complete
• 67/94ths ready to be brought up to full voltage
  once gas is flowing.
• Finish during the 2 wk shutdown.