Transcript Station Acceptance Test Update News We’ve received a water cooled He compressor + gas hoses (from RAL) and a chiller (from DESY) • dept.

Station Acceptance Test
Update
News
We’ve received a water cooled He compressor + gas hoses (from RAL)
and a chiller (from DESY)
• dept. requires electrical tests first
(compressor needs a 3-phase plug
fitted by an electrician)
• do a simple cooling test for the chiller
+ write a little monitoring interface
Mechanical pieces
• thick Pb is difficult to get hold of
& also to machine
 go for Brass
29/11/2006
M. Takahashi
2
Data Taking (discussion from TkWkshop)
Source scan run
• Move the source perpendicular to
the fibre run on each view
• 100 micron steps x 3 lines
 27k points to scan
•
Aim for 10k events per ch per line
= 2k events per point
= ~10 sec per point @ 200Hz
 3.2 days per station @ 200Hz
6.4 days per station @ 100Hz would still be alright,
or we can simply do with a reduced statistics
(Source is active enough to achieve 200Hz in 10 months time)
29/11/2006
M. Takahashi
3
Data Management
Information independent of individual station test
• channel mapping
• readout component details (which cassette, boards)
Data from a complete station test  zipped & stored
• pedestal: 10k events worth of raw data (50MB) + pedestal values
• source scan: ~1GB of data per station after zero suppression
– each hit accompanied by channel # (AFE ch #) & station position
– disposable histograms of CM for monitoring?
• run info: station ID, date stamp, a list of pedestal values
Summary file at the end of a station test  readily accessible
• histograms of hits (in a graphical form) for each channel?
• channel position (pitch) identified from data
• channel LY & uniformity graphs + list of values
• flag on problematic channels & make a note
+ Anything that I’ve missed…
29/11/2006
M. Takahashi
4