ABS tune-up / commissioning
---------------------------
Status August 1, 2002
Vacuum:
-------
+ separation valve dissociator /sixpole chamber
operational and in EPICS
+ 2 convectron gauges (C2, C3) operational and
in EPICS
+ gas flow into dissociator/QMA established
RF dissociator:
------------
+ matchbox interface blows fuse on motor, simply
replacing the fuse does not help
+ EPICS control almost finished
QMA:
----
+ QMA is mass tuned and operational, have taken
mass spectrum with channeltron maximum pressure
at 100sccm is in 10^-7torr range
+ observed intensity change in QMA of factor
of 10 for 50sccm and factor of 5 in background,
this might tell us that we have a very good
signal to background ratio of 1:1
+ connected to lock-in amplifier; chopper ok but
QMA signal needs more work
Nozzle:
-------
+ wires on nozzle temperature sensor fixed,
coldhead running, temperature stabelized at
100K, left running over night
DAQ:
----
+ retrieving data and storing in ntuples
almost complete, minor problems, needs
some work still
Running in BLAST:
-----------------
spectrometer magnet test resulted in broken
fuse in chopper motor and malfunction in the
connection to QMA.
+ turn of chopper during future magnet operation
+ QMA should be able to stay on but we need to
disconnect RS232 connection
Job list August 2, 2002
-----------------------
+ establish QMA signal into lock-in amplifier and
pipe into EPICS, measure amu 1 and 2 with chopped
signal
+ fix fuse problem in matchbox
+ keep nozzle at 100K flow H2 and turn on RF power
in dissociator
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:28 EST