Transcript 6 November, 2015 Tracker:    Mechanical Cryo status Schedule Mechanical status:  Three remaining (spare) stations will be completed:     Carbon-fibre bodies being machined in Liverpool Doublet-layers prepared at Imperial Decided top service.

6 November, 2015
Tracker:



Mechanical
Cryo status
Schedule
Mechanical status:

Three remaining (spare) stations will be
completed:




Carbon-fibre bodies being machined in
Liverpool
Doublet-layers prepared at Imperial
Decided top service cryocooler cold head once
QA of final three (spare) stations is complete
Space frame for tracker #2:

Parts available, not yet under construction


Not pressure at the moment
More details at CM20
Waveguide Status
• The first production of fiber light guide has been
operated with the first tracker at RAL.
• G-Tech started production of waveguides for the
second tracker in January.
– G-Tech will finish fabrication by middle of March, and
will be ship to fermilab by the end of March after
checking quality in Osaka Univ.
– We found that we need additional connector parts for
2 bundles of external waveguides, internal connector
parts for spare tracker (tracker3)
– Imperial college will provide the additional parts by
the end of February.
2015/11/6
M.Yoshida
Cryo
 Production cryostats 1 and 2 are running smoothly at
operating temperature
 Production cryostat 3 is ready for cooldown, but was waiting
completion of tests with 1&2
 Production cryostat 4 has its cassettes installed

Almost ready for cooldown
 AFE power mods complete for Cryo #1 and Cryo #2 and we
no longer have any low voltage power problems
 Cassette 109 in cryo #2 has developed an internal leak and
will have to be pulled


This is the same problem that occurred with cassette 110 at RAL
and was fixed (now in Cryo #4)
This issue may be related to cassettes 109 & 110 either in their
original fab or from the fact that they were sitting in the D0
test cryostat for over 2 years.
 Cryo #2 is being warmed up and will be replaced with Cryo
#3.

Cassette 109 will be pulled and the leak(s) fixed
 The AFE power from Cryo #2 will be moved to Cryo #3
 Readout tests will continue this week with Cryo #1 and next
week with Cryo #1 and Cryo #3 (assuming cool-down goes
according to plan)
 Cassette characterization for Cryo #3 will also occur next
week if possible
 Target is to ship system (Cryo #1 and Cryo #3) by 3rd or 4th
week of this month
Cryo on Stilts
New Configuration – Wiener PS located below cryostat
VLSB Testing
• We’re using a test stand at FCC which sends repeating
data patterns to the 4 memory banks of VLSB boards.
• A two-board set-up is being used.
– Preparing each board to receive data takes about a µs per board
which is too long.
– To get this to work, we’re sending a data trigger enable signal
from a master board to a slave board via a LEMO cable
connection. This takes only about 20 ns.
– For MICE beam, this won’t be necessary, but it’s useful for selfinjected data and cosmic ray data taking modes.
• This has uncovered some code bugs which have been
corrected.
11/6/2015
VLSB Testing
• What works
– Suppression of zero words
– Triggering on control register specified trigger word
– Data trigger enable signal sent from master board to
slave board in about 20 ns.
– Control registers correctly indicate
• Final address of memory bank with data
• Number of events in a spill
• What doesn’t work
– Getting both boards to start recording data at the start
of first trigger word.
11/6/2015
Latest Progress
• We’re using firmware analyzer pod signals to get to the bottom
of why boards record data at different times.
• We’re aiming for updates indicating the diagnosis and solution
within a couple days.
• Latest firmware will be tested at FNAL cryostat/AFE-IIt/VLSB
test stand as soon as possible.
– Another test of AFE-IIt and VLSB firmware
– Could reveal implications of differing input data streams
• From AFE-IIt boards
• Data pump providing repeating data patterns of simulated data
11/6/2015
Schedule:


Will discuss/update at CM20
Particular issue:

Coordination of schedule with heavy civil
construction work in MICE Hall