November Tracker Install¶

This page has a bunch of notes, from setting up the trackers in November 2014.

Hardware Installation¶

• Wienier Power Supplies:
  • Mains Power supply connected through Daresbury control system,
  • 5V TTL signal fanned out from the Fermilab rack monitor.
  • Cryo2 PSU shows over voltage protection
  • This was caused by a short between the 5V5 rail and the cryostat, using an over tight cable tie.
  • In addition there was a broken sense wire (probably manhandling).

• VME Crates:
  Upstream Rack contains DAQ crate and C&M Crate.
  Downstream Rack contains DAQ crate.

• AFE Boards:
  

• LVDS Cables
  The left hand boards (viewed from the front) seen here on the right begin with the LVDS silver side up (for all cables)
  The right hand boards (viewed from the front) seen here on the left begin with the LVDS silver side down (for all cables)

• 1553 is the coaxial cable on the far left, connected to J26 shown above.

• The Encoded clock signal is connected to the upper coaxial cable. This is provided from a VME fanout, configured with TTL Bar (inverted).
• The integrations window is connected on the below cable (marked red).

h.3 Photos:
1553 Controller Address
1553 Backplane Address
VLSB Address
VLSB Front Panel

Cryostat Cooling¶

• Alan Recalibrated the Oxford ITC503's
  • Cryo 1,2,3 all have "good" calibrations.
  • Cryo 4 would not communicate, however a calibration was completed by hand.
  • The spare was pretty useless.
  • All numbers are slightly untrusted, Alan plans to try and replace.

• Upstream Cryos:
  • Cryo 1 - 30m line, Charged 1.4MPa, After cooling for 2.5 days, temperatures: 82.3, 7.8, 7.4, insulating vacuum: 2.1E-7 Torr
  • Cryo 2 - 30m line, Charged 1.4MPa, After cooling for 2.5 days, temperatures: 82.4, 8.0, 7.5, insulating vacuum: 1.9E-6 Torr
  • Temperatures on the VLPCs read around 9K - no headroom for heaters to stabilise at 9K.
  • During setup compressors 1 & 2 blew the pressure relief valves.

• Downstream Cryos:
  • Cryo3 - 10m line, charged 1.6MPa, temps: 82.5, 7.8, 7.0, vacuum: 3.1E-7
  • Cryo4, ?m line, charged 1.6MPa, temps: 71.1, 8.0, 6.7, vacuum: 3.8E-7

Rack to Rack Cabling:¶

MLCR->Upstream Tracker Rack (TR-US-n)

Cable (n)	Length (ns)	Checked	Asignment	1	249	OK
2	249	OK
3	249	OK
4	249	OK
5	249	OK
6	249	OK	Particle Trigger
7	249	OK	Integration Window
8	249	OK	LED Trigger

New cabling to be updatedd...

MLCR->Downstream Tracker Rack (TR-DS-n)

Cable (n)	Length (ns)	Checked
1	151	OK
2	151	OK
3	151	OK
4	147	OK
5	146	OK
6	153	OK
7	140	OK
8	140	OK

Uptream -> Downstream Tracker Rack (TR-USDS-n)

Cable (n)	Length (ns)	Checked
1	112	OK
2	112	OK
3	112	OK
4	112	OK
5	112	OK
6	112	OK
7	225	OK
8	225	OK

Assorted Troubleshooting:¶

• If Temperatures read around 20k and are constant, connection to cassette is bad.
• If VME crate Fails t establish connection, check that the a2818 driver is loaded from ~/a2818_Drv (probably)
  • If this fails, check the card is in the machine.