SuperFGD input for schedule - CERN Indico
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SuperFGD input for schedule
SuperFGD
Super Fine Grained Detector
arXiv:1707.01785
JINST 13 (2018) P02006
(cube size not to scale) A new concept for a highly segmented and high-performance detector
1×1×1 cm3
Some event displays
0.56m ●
1x1x1 cm3 plastic scintillator cubes with 3 fibers
1.92m
readout along x, y, z
1.92m ●
2 106 cubes
Front view Side view ● ~60 000 readout WLS and MPPC
● Active mass 2 t
● Detailed (3 2-D) projections and high segmentation
12
● Good tracking, timing, PID
• 1×1×1cm3 plastic scintillator cubes read out
in 3 directions by WLS fibers and MPPCs
• ~2 million cubes, ~60k channels
• ~2 ton active mass
2
Slide from “ND280 upgrade Workshop CERN, 3-4 October 2018”
Very preliminary plan (I)
Shown in October 2018
SFGD should be ready for installation by 1st October 2021
Detector assembly: J-PARC or KEK, start in Fall 2020
SFGD components Preliminary deadline
- scintillator cubes first delivery (~30%) by Summer 2020, full by January 2021
- MPPCs. WLS fibers, optical interface March 2021
- box, mechanics September 2020
- calibration system April 2021 ??
- electronics, cables May 2021
Administrative, engineering and technical support at J-PARC (KEK)
- person in charge at J-PARC or KEK
- MoU, documentation, paperwork, logistics, custom….
- storage, assembly area, mechanics, stands, tools, safety…
Time and manpower for assembly and tests (rough estimation):
- 7-9 months, 2 shifts (8+8 hrs), shift team: 2 students + 1 expert
Assembly procedure will be tested and finalized with
a large prototype of (1 2) x 105 cubes w/o electronics at INR in Summer 2019
13
3
ss form with 12 chambers
uctivityProduction ofsec
12 cubes/80 cubes and drilling holes
00 cubes/hour 5000 cubes/day (10 Drillinghrs)
machine
One of the drilling machines in Uniplast is shown. Two machines are available for work now,
two more are in the process of delivery from a manufacturer. Size of the machine looks
excessive for drilling of small cubes, but we need massive power spindle for fast and accurate
drilling.
5 2
4
Cube production
Production
Scintillator production of cubes
New press form with 12 chambers
- productivity 12 cubes/80 sec
~ 500 cubes/hour 5000 cubes/day (10 hrs)
Drilling holes
Drilling holes
Drilling holes (2 drilling machines) at Uniplast
- productivity ~ 150/hour ~2500/day
+
1 drilling machine bought -> delivery on 20 Feb 2019
+ 2
1 drilling machine ordered –> delivery in about 2 months
~5000/day with additional machines
5
Cube
Assembly of assembly
1 Plane : time estimation
Estimate by Yury
Quality control of cubes (selection, dimensions, holes…)
~30 min/string
4 people select cubes for 192 strings ~25 hrs
Assembly of 1 string 15-20 min
4 people assembly 192 strings for 16 hrs
Assembly of 1 line in a plane ~30 min
Assembly 192 lines from 2 opposite sides ~50 hrs
Total time for assembly of 1 plane ~60 hrs
approximately 1 week
36864 cubes / plane
56 planes for SFGD
Plan still to be defined, possibility of multiple sites 11
6
size and hole geometry from specified values.
We have assembled the first
sheet from 36800 cubes.
• QA/QC and assembly procedures still in rapid
development
• Assembly of planes in Russia proposed recently
• Alternative approach also being investigated
• Will work to define timelines and milestones with
latest information in coming weeks
• More solid estimate expected by May,
with experience of assembling several planes
7
Mechanical structure
The mechanical box
• Sandwich of 2 mm carbon-fiber (CF) skins and AIREX core (0.06 g/cm )
or Rohacell (seems stronger than AIREX)
3
• Basic design of box and
• The 6 CF-based plates will be screwed together
CF
interface defined AIREX
CF
The light readout interface
• Each CF plate has 3 mm holes to
get WLS fibers out of the box
• Stress tests at CERN to compare
• Estimate of production
CF sandwich with and without
holes
✦ 15-20% more deformation
timeline available in
✦ Stress not an issue
• Stress tests confirmed the FEA
results 2
~month
• Based on US-Japan
prototype
8
Electronics
sFGD electronics readout scheme
First transfer of files between UniGe and LLR:
• LLR to work on the design modifications. • end January 2019
• NDA is signed between LLR (Ecole Polytechnique) and UniGe. • Schematics
• CITIROC cost from LLR (Omega price for IN2P3, not CITIROC • PCB layout (PDF)
price, confirmed with Christophe de la Taille). • BOM 5
• FEB specification v3.0
9
sFGD electronics schedule (still preliminary)
By Etam
3
10By Etam
sFGD electronics project milestones and deliverables
TBC
4
112018 2019 2020 2021
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
R&D
Scintillator cubes
Mass production
Cube assembly R&D
procedure Test with 10%
Procurement
WLS fiber
QC and preparation
Prototype
Optical coupling Connector production
MPPC-PCB production
Procurement
MPPC MPPC mounting on PCB
MPPC QC
Design
Prototype test
SFGD mechanics
Fabrication
Shipment to Japan
Design
ASIC/FPGA procurement
SFGD FEB
FEB prototype
FEB production and test
Design and prototyping
Backend electronics
Production
Design
Calibration
Production
Design
DAQ Final system
System test
Cube assembly
Assembly and MPPC, electonics integration
integration Commissioning on surface
Installation and commissioning
To be updated with more detail
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