TOF Status Report TIM 24 28 Jul 2006 at CERN

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TOF Status ReportTIM 24 - 28 Jul 2006 at CERN

• Lower TOF Flight Detector completed
• LTOF detector TV test in Terni (B.Bertucci)
• Results of functional test after TVT
  (F.Giovacchini)

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The TOF Apparatus
UpperTOF
ACC
Four scintillator planes 1) 8 counters, 36
PMTs 2) 8 counters, 32 PMTs 3) 10 counters, 40
PMTs 4) 8 counters, 36 PMTs
LowerTOF
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Lower TOF
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TOF detector costruction-Overview

• The detector design, financing and construction
  as been done in INFN, Bologna under G.Laurenti
• The technical staff
• A.Evangelista, C.Guandalini, S.Finelli, F. Degli
  Esposti, M.Lolli, R.Pilastrini, R. Zagato,
  A.Zucchini

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TOF assembly Thin PMT leads soldering to HV
divider cards
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TOF assembly Counter calibration in Cosmic Ray
Telescope
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TOF assembly Lower TOF mechanical structure
Structural part of the LTOF mechanics
Mounting the Honeycomb Panel supporting the
Scintillation counters (Giuliano team,
C.Guandalini, S.Filelli and R.Pilastrini)
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TOF assembly Mounting and fixing counters of
Plane 4
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TOF assembly Prepare mounting of Plane 3
counters
Last inspection of plane 4 cables and grounding
by Guido
Plane 3 down cover inspection by Renato before
mounting counters
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TOF assembly Mounting of Plane 3 counters is
complete
The reinforcement bars to fix curved lightguided
PMT
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The functional test of the LTOF

• A complete set of Cosmic Ray data have been taken
  in Bologna before going to Terni

The LTOF assembled in Bologna All cables
used in the functional test are shown,
testing both the internal section and that
outside the TV chamber flange
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The Functional test of the Lower TOF The LTOF
detector transport to SERMS at Terni
The LTOF has been put in a wooden box wrapped in
an anti-dust cover and fixed to the container via
the suspending arms
The LTOF container was transported to Terni on a
Light Lorry standing on four air cushions
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Remarks on the TV test of Lower TOF

• The main concern was on PMT ageing
• Produce a significant test of extreme conditions
  of temperatura without stressing the Flight
  hardware
• The thermal cycles had to be tuned on PMT
  temperatures
• The PMT temperature behaviour was measured
  outside the EM copper shielding of the PMT case
• The thermal model of the PMT case was validated
  with a special TV test in Bologna

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Termo Vacuum Test in TerniCGS planned TVT test
profile for Lower TOF
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Study of the thermal PMT model
The study was done In the Bologna Termovacuum
Chamber One PMT complete With base, plastic
Envelope and External electrostatic Copper cage
was sitting In the center of the TVT
chamber One Dallas was sensing The PMT
temperature Another Dallas and a Pt100
controlled the Cu shield temperature
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Study of the thermal PMT modelBelow the
temperature cycles performed
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Study of the thermal PMT model
The first day various thermal cycles have been
performed with the PMT HV always ON The final
equilibrium temperature of the PMT (red line) is
slightly higher than the Cu external shield (blue
line Dallas, yellow line Pt100)
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Study of the thermal PMT model
The maximum temperature difference between the
external Cu electrostatic sheld and the PMT
inside the insulating box is less than 2C. This
is clearly seen switching OFF and ON the PMT HV.
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LowerTOF wiringPlane 4 p (X) cover and Heater
Pannel
Positions of the Dallas sensors
401p 404p
406p SFEC4p
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The Functional test of the Lower TOF Monitoring
the PMT temperatures in the thermal cycles
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The Functional test of the Lower TOF Monitoring
the PMT temperatures in the thermal cycles
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LowerTOF wiring Plane 3 n (-Y) PMT wiring and
Patch Pannel
Positions of the Dallas sensors
SFEC3n 302n 305n
309n
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The Functional test of the Lower TOF Monitoring
the PMT temperatures in the thermal cycles
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The Functional test of the Lower TOF Monitoring
the PMT temperatures in the thermal cycles
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Concluding remarks

• The TV test ended succesfully in 10 june, and was
  a joint effort of CGS, SERMS and Bologna (see
  B.Bertucci)
• Since then we are analysing in detail the
  Functional test runs (see the F.Giovacchini
  presentation), but no major problem has shown up
• The vibration test is starting just now in Terni
  and will be completed before mid September
• The UpperTOF detector assembly will start
  immediatly after the end of the LowerTOF
  validation.
• A complete report on the flight TOF performances
  after the spatialisation tests will be presented
  to the Collaboration.