Prsentation PowerPoint

1
Tagger

• 1.Tagger design
• Position-Interface/Dvcs/chamber
• Tagger design
• Shielding
• Scintillators
• Light guides
• Bases
• Paddles assembly
• 2.LPSC-Jlab Assembly procedure
• 3.Tagger external cabling

Tagger
2
Tagger Interface
38
18
3
Tagger design
2 mm
38

• Shielding
• 1 cm thick stainless steel
• 3 mm thick aluminium
• Scintillator
• 2 cm thick EJ 200
• 8 mm under 18
• 2 mm over 38

18
8 mm
4
Stainless steel shielding design

• Polygonal frame
• 20 flat stainless steel elements
• Elements will be weld together
• Lab. production to reduce the cost

5
Scintillator layers
1st Scintillator Layer 28 scintillators 9
different shapes
2nd Scintillator Layer 29 scintillators shifted
by 1.5 10 different shapes
13.5
90
30
87
6
Scintillator shape
- Projective shape The two lateral sides are
inclined (except 1 side for half
scintillators) - Rough Diamond
milled Scintillators will not be polished
7
Light Guide

• Material polished PMMA
• (triangular center shaped
• except for half scintillators)

8
Light Guide welding
Dymax 20262 Ultra Light welding
9
LPSC base prototype
HV-Signal-DC out Connector
Amplification board
LV (5 V) daisy chain connectors
HV Distribution board
Screws(Springs?)
LV (5 V) daisy chain
10
Paddles assembly

• Scintillators
• Wrapped with Aluminium black Tedlar
• PMT shells
• The shells will be in 2 parts.
• They will pinch the top of the
• light guide.
• PMT
• Pmt and its HV board will be put in the shell
• Pmt pressure will be applied by 4
• screws on the HV board
• Paddles
• Each paddle will be screwed to the
• shielding at the Pmt shell level.
• PC Board
• Amplification board can be disconnected without
  removing paddles.

11
LPSC test prototype
12
LPSC Assembly procedure

• Aim to solve mechanical problems make the
  internal cabling in order to reduce
• JLAB assembly time.
• Paddles Assembly
• - Scintillators and light guides will be glued.
• Scintillators and light guides will be wrapped
  into aluminium and black Tedlar.
• Pmt shells will be fixed onto top of light
  guides.
• Pmts and electronics will be put in and screwed
  onto the pmt shells.
• Shielding layer is used as the main structural
  frame and put in horizontal position.
• Tagger Assembly
• 1st paddles layer will be assembled onto the
  shielding.
• This 1st paddles layer will be all cabled.
• 2nd shielding layer will be installed.
• 2nd paddles layer will be assembled onto this
  2nd shielding.
• The 2nd paddles layer will be all cabled.

13
Jlab Expedition procedure

• In order to minimise the Jlab assembly time, the
  internal cabling will stay on
• Light tight cover
• - The 2 paddles layer will be disassembled.
• The 57 paddles will be protected and packed in
  boxes.
• The 57 Pmts and their electronics will be
  disconnected, protected and packed.

14
Jlab assembly procedure
Pmts and electronics will be put in the pmt
shells using optical couplant. Then paddles
layers will be assembled onto shielding and
reconnected to the internal cabling.
15
Tagger Patch Panels
HV Inputs
Signals DC out
LV daisy chain Input
2 Tagger Patch Panels
LV daisy chain Input 2
Bracket to carry cables weight
16
Tagger Cabling
Tagger Area
Calorimeter Area
Trigger Area
7 m
40 m
60 SHV M
60 SHV F
Hv Cables types ?
HV Power supply
HV
Ø5?
Ø11?
Ø5?
60 Lemo F
60 Lemo M
60 BNC M
60 BNC F
60 BNC F
60 BNC M
60 BNC M
60 BNC F
60 BNC F
60 BNC M
60 Lemo M
60 Lemo F
A R S
Trigger Patch Panel
Calorimeter Patch Panel
Signal
Harting DIN 41612
Harting DIN 41612
DC OUT
60 Lemo F
60 Lemo M
60 Lemo F
60 Lemo M
Adaptative Box
ADC
6v / -6v Power Supply
? (TBD)
LV
? (TBD)
Provided by JLab
Provided by LPSC
To be defined