Prsentation PowerPoint

1
AMS-02 _ ECAL

• ECAL status in Beijing
• Weight saving progress status (incl. ECAL Crate
  moving)
• Mission Success tests in TERNI (see next)

J
ECAL Group
TIM meeting, January 2004

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ECAL Flight Model
Progress status in Beijing1
According to the informations given by
the Beijing
Group, Wang Yi (MIT)

• FEA results
• FE model correlation and Weight saving
  analysis have been done and
• accepted by LMSO.
• Weight saving options
• After discussion, only Lateral panel
  modifications are accepted by
• ECAL group. No change on support beams (-1
  Kg but critical position)

-6.5 Kg
18mm
38mm
ECAL Group
TIM meeting, January 2004

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ECAL Flight Model
Progress status in Beijing2

• ECAL Drawings
• All the drawings have been completed and
  sent to ECAL collaboration
• for approval (interface issues with Pancake/Light
  Collection System)
  
• ? To be sent to
  LMSO for final agreement (this week?)
• 
  ?
• 
  Manufacturing
• AL 7050 material for Brackets
• LMSO prepared the cutting off and the packing
  
• ? delivery by the end of January.
• Fasteners
• New fasteners list has been sent to LMSO
• (26 Dec. 03) ? delivery by the end of
  March.
• Spring foam (Therm-a-gap A274 or T274)
• Order sent to INFN/Pisa (15 Dec. 03)
• ? delivery by the end of February.

Al 7050 waiting for shipping
ECAL Group
TIM meeting, January 2004

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ECAL Flight Model
Schedule in Beijing
1- ECAL Mechanical Support
completed End of March
(Pancake arrival in Beijing) -
2- ECAL support structure assembly
By April 15 -
3- Sine-Sweep on Flight
Model (modal check)
End of April -
4- ECAL Flight model sent to LAPP
By May 15
Light Collection System
mounting by LAPP team
Any later arrival, such as AL 7050, fasteners, or
Spring Foam, may delay this schedule.
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving On
Pancake Dead material
Pancake Superlayer
Such a re-design would change the assembly
procedure
Lead scintillating fibers (d6.5g/cm3)
Exploded PMT Tube
Active part edge
Volume of the current Pancake
658658(918.5) mm3. But active part is 36 PMT
x 18 mm 648 m (10 mm less in one direction) Max
Volume to be replaced/ super layer
1018.5658 121 000 mm3 (121 cm3) But only 6mm
has to be considered (prevent edge effect) Mass
saved for 6mm on 9 superlayers (3 on each side)
M 3 Kg.
Glass fiber rod glued on Pancake (d2g/cm3)
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
EIB wires
6 cm
EFE wires
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
Table of EIB Cable lengths (Former ECrate
location)
Main constraint given by Trigger schematic
ECAL crate
Reference of the EIB cable
ECAL crate
Conclusion 2 m is the mean length for EIB
cables gt 142 m x (70 gr/m) 9.9 Kg (EIB
cable) Nb HV cable study on progress (a
mean value of 1.7 m is expected)
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation

• ECAL Crate moving
• 2 configurations studied / HV Bricks (3030 /
  2121)
• (CAD views)

 3030  configuration
 2121  configuration
ECrate
RICH HV bricks
2 HV bricks
3 HV bricks
1 HV brick
3 HV bricks
ECrate
Not yet approved by LMSO
Approved by LMSO and CGS
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
ECAL Crate moving ? 2 configurations studied / HV
Bricks (3030 / 2121)
2121
3030
RICH
1 ECrate
Lower USS-II
3 HV bricks
Vues CAO
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
Cabling schematics on 3030 configuration
(bottom view)
_ HV cables.
HV brick
ECrate
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
Cabling schematics on 2121 configuration
(bottom view)
_ HV cables.
Face C
HV brick
ECrate
Face B
Face D
Note that for both configurationsTrigger and
EIB cables keep the same path
Face A
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
Cabling on Mock up (3030 configuration)
Cable path on USSII
From ECrate side Yellow cables EIB
cables Orange cables Trigger cables
From HV bricks side Connection of HV cables
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
Cabling on Mock up (3030 configuration)
HV bricks (x2) side Connection of HV cables
Cable supports on USSII to be defined.
EIB
Single HV brick side Connection of HV cables
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
Table on 3030 configuration (half mock up
equipped)
4 different set of cables
5 different set of cables
3 different set of cables
ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
Table on 2121 configuration (half mock up
equipped)
5 different set of cables
3 different set of cables
3 different set of cables

• Only change on HV cable length from 159 cm to
  142 cm
• (cabling without the constraint on double HV
  line).
• Link (flexible line) between double and single
  bricks ?

ECAL Group
TIM meeting, January 2004

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ECAL Weight saving
On Instrumentation
Comparison between 3030 and 2121 and
Conclusions
-2 Kg / former weight saving
-3.5 Kg / former weight saving (no shielding on
cables)

• Consequences on EIB
• (mechanics and electronics)
• ? Redesign in progress to integrate
• One 51 pins microD connector put on
• Bracket side,
• One 15 pins connector
• (on the same side)

ECAL Group
TIM meeting, January 2004

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ECAL mass Budget Current status /
Weight saving summary

• Sub Part Current mass (Kg)
  Optimized mass (Kg)
• Mechanics 73.6
  66.6 (-6.5 Kg
  achieved)
• Pancake 492.6 489.0
• Instrumentation 98
  87.2 -5.5 ? 81.7 Kg
• TOTAL 665.7
  Kg 637.3 Kg
• Complying to Wang Yi status report (synthesis of
  the work performed in China)
• Last lead foils replaced by aluminum ones on
  Pancake (accepted by ECAL group)
• ?
  - 4Kg saved per foil.

For more contingency / ECAL weight budget (638
Kg)
ECAL Group
TIM meeting, January 2004

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