TOF status report

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• TOF status report
• Veronica Bindi, Detector and Data Analysis
• Alessandro Basili, Electronics
• CERN February 5, 2008

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TOF status report Veronica Bindi, on behalf
of AMS TOF collaboration CERN February 5,
2008
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Upper TOF succesfully integrated
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Upper TOF half plane 1 and half plane 2 are read
out
Plane 1 side P
S1
RAM radiator
Plane 2 side N
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Upper TOF connection to S-Crate S1 and SHV1-Brick
PMTs on UTOF plane 1 side P and plane 2 side N
are connected to EM S1-crate and powered by
SHV1-Brick.
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Upper TOF acquired by JMDC
Since December 2007 data acquisition has started,
with TRD detector and with Tracker detector
(since mid-January). During this period detector
procedures and settings have been improved. In
the scientific runs acquired up to now, the
trigger setted on JLV1 board was TOF plane 1 AND
TOF plane 2 Very preliminary results have been
obtained, consistent with expectations. Some
examples are shown in the next slides.
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Preliminary results for Upper TOF
Rate (N/Ntot) Planes 1 and 2
Relatives to the Run 1201279137 (25/01/08
1638)
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Preliminary results for Upper TOF
1p
2n
Pulse Heigths Planes 1p and 2n
Relative to the Run 1201279137 (25/01/08
1638)
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Before de-integration... 1) the whole Upper TOF
will be read out
Plane 1 side P
Plane 2 side P
S1
RAM radiator
WAKE radiator
S0
Plane 2 side N
Plane 1 side N
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Upper TOF connection to S-Crate S0 and SHV0-Brick
PMTs on UTOF plane 1 side N plane 2 side P
are connected to QM S0-crate and powered by EM
SHV0-Brick.
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2) UTOF Dallas sensors will be monitored for
each TOF plane, two Dallas chains (A and B) are
installed, with 8 sensors each. As soon as
possible the UTOF Dallas sensors will be
integrated in the read out.
TOF panel Dallas connectorT1
3) All flight signal and HV cables will be
tested 4) Flight cables for SFEC read out will
be produced and tested.
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Lower TOF ready for integration with Aerogel
container (already done)
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TEST with cosmic rays on the LTOF (November 2007)
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LTOF
2 TOF AMS-1 counters
JTCrate
HV Brick
SCrate
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LTOF schematic view
Ref 1P
Plane 4 Side P
Ref 2P
HV connections
HV connections
Plane 3 Side P
Plane 3 Side N
Plane 4 Side N
Ref 2N
Ref 1N
Two AMS-01 reference counters used to generate
the trigger.
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Trigger configuration (Ref1N or Ref1P) and
(Ref2N or Ref 2P)
SPT pre-trigger MASK
SFET2 a
JLV1 FT LV1 set up
CP S1
AND
SFET2 b
FT0
LV1
SFET2 c
CP S2
SFET2 d
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LTOF data analysis results
Charge as a function of position for plane 3 ( X
axis pos cm Y axis peak ADC ch )
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LTOF data analysis results
Charge as a function of position for plane 4 ( X
axis pos cm Y axis peak ADC ch )
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LTOF data analysis results
Light velocity plane 3 ( X axis pos cm Y
axis time semidiff. ns )
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LTOF data analysis results
Light velocity plane 4 ( X axis pos cm Y
axis time semidiff. ns )
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Conclusions

• UTOF is acquiring data with TRD and Tracker
• Analysis is in progress
• LTOF ready for integration.