1. Mauro Savrie' INFN Ferrara
BES III Italy
Update on CGEM
CGEM
Detector layout
Present status
Time schedule
gas system for CGEM
Cooling system
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

2. Mauro Savrie' INFN Ferrara
CGEM-IT Detector
3 layers: L3 L2 L1
Layout:
Anode, Gem1,Gem2,Gem3, Cathode (2mm,2mm,2mm,2mm,5mm)
30 permaglass structural rings
6 permaglass service flanges
2 supporting flanges
28 Gas connectors ( inlets+outlets)
2 interconnecting flanges (end March)
78 HV cards
Tooling:
15 aluminium moulds
Microscope table: visual Gem foil insp.
Planar gluing table
Cutting Gem/anode Foils table
Tooling for Detector assembly
Clepsydra
Positioning table
Centering device ( Layers assembly)
2 interconnecting flanges: il disegno sara’ finito per la fine di Marzo
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

3. CGEM-IT/MDC interface
flange1
flange2
East side
(gas inlet-bottom)
West side
(gas outlet-TOP)
Dimension of CGEM-it:
Rmin: 68mm;
Rmax: 181 mm;
Lmax: n.g.
Lmax: 1045mm
To be replaced:
Flanges 1 east and west will disapper
flange2 (west side) will stay in place
Flange2 ( east side ) will be a new one or modifed
CGEM: Rmin=68mm; Rmax,anode=179.2;Rmax,ing.=180.7
Cilindro di separazione: Rmin=182.5mm
Clearance:1.8mm
Lunghezza disponibile per CGEM: L=1046
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

4. CGEM-IT update New Ring Aluminium Permaglass
East Supporting Flange
West Flange 2
to be modified
West Flange 2:fixed
West Supporting Flange
New Ring
It holds the separation cylinder
It is screwed on West Flange
Aluminium
Permaglass
Supporting flanges: INFN Ferrara
New Ring: IHEP
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

5. Mauro Savrie' INFN Ferrara
CGEM-IT update
Supporting flanges modified
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

6. Mauro Savrie' INFN Ferrara
CGEM Layer 1
Mechanics:
General drawings: completed and approved
Tooling & materials:
Aluminium moulds: delivered
Accepance test in LNF: done
Permaglass rings: already checked and ready
Service flanges & spare rings: expeted by the end of March
Kapton: GEM,Anode,Cathode, Ground Plane (no planar gluing):
delivery by March 8 but the Anode end of March.
acceptance ( Visual & HV test ): in LNF by the end of March
L1 construction:
L’ anodo non era di buona qualita’ ed viene riprocessato: 3 settimane
Cathode: already started beginning March
Anode, Gem1,Gem2,Gem3: ready beginning of April
L1 assembly : second half of April
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

7. Mauro Savrie' INFN Ferrara
CGEM Layer 2
Mechanics:
General drawings: all executive drawings done
Tooling & materials:
Moulds:
Cathode  second week in April
Permaglass rings & Service Flanges: 6/14 ordered (expected by mid April?? )
Kapton: Gem,Anode,Cathode, Ground Plane (planar gluing):
Anode circuit: beginning of April
Cathode : beginning of April
Gem1-3: flushing to 3 microns Ready ( undulation compensation)
acceptance ( Visual & HV test ): by the end of April (LNF)
Check the tables and tooling for tests in LNF end of April
L2 construction: should start first week in May
Permaglass Federico deve fare le tavole e poisi fanno gli ordini
I circuiti delle GEM e il catodo presentano leggere ondulazioni che possono essere compensate mediante ricottura in forno in atmosfera di N2
L2 construction:
Start: first week in May
Completed: End of July
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

8. Mauro Savrie' INFN Ferrara
CGEM Layer 3
Mechanics:
3D model to be completed: close to be done
executive drawings:
Moulds and accessories: ordered.
Permaglass rings and flanges : executive drawings (end April)
Cathode, Anode & GEMS: executive drawings (end April)
Tooling & materials:
Moulds:
Expected by the end of May
Modify gluing table and other facilities for the tests in LNF ( LNF)
Modify interface ring for clepsydra
Kapton: Gem,Anode,Cathode, Ground Plane (planar gluing):
Drawings ( Gatta/Melchiorri): mid April
Anode circuit : End of June
G1-3, Cathode, gnd plane: End of June
acceptance ( Visual & HV test ): in LNF Beginning July
L3 construction:
Start: first week in August…..hopefully
Completed: End of October
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

9. Mauro Savrie' INFN Ferrara
CGEM-it assembly
Tooling necessary for assembling:
Layers:
Clepsydra: changes needed for L1 and L3 assembly ( new rings side out) Ready
Tooling for centering GEMs while assembling the layer Done
CGEM-it: work ongoing
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

10. Mauro Savrie' INFN Ferrara
CGEM
summary & issues
Layer 1
all items available by the end of March at the latest
Layer 2
not on a critical path:
Anode design and production
Gem flushing ( Cu to 3 µm )
Cathode & other designs ready
Orders already placed
Layer 3
A lot of work to do but we are still on schedule
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

11. Mauro Savrie' INFN Ferrara
F.E. Cooling
Two system :
Cold liquid flow
INFN Torino
Responsibility & coordination: Beppe Giraudo
Cold Air Flow
Measuring system is ready and working
Mockup ( half detector ) is equipped
We stated measuring with air flow at ”room Temperature”
Airvortex device: arrived and tested
Measurements with Airvortex are in progress
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

12. Mauro Savrie' INFN Ferrara
Air Flow Cooling Test
Two adjacent channels
Power:2.2 W
Tmax=58-60°C
Two adjacent channels
Power: 3.7 W
Two steps cooling
Tmax= 75-85°C
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

13. Mauro Savrie' INFN Ferrara
Air Flow Cooling Test
all channels
Power: 2.5 W
Tspread= °C
All channels
Room temperature
~1 °C spread
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

14. Mauro Savrie' INFN Ferrara
Air Flow Cooling Test
all channels
Power: 2.5 W
Tspread= °C
All channels
Room temperature
After re-calibration
~1 °C spread
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

15. Mauro Savrie' INFN Ferrara
Air Flow Cooling Test
with Airvortex
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

16. Air Vortex Cooling Test
all channels
Power: 2.4 W
Tspread= 8-36 °C
Cooling stability
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

17. CGEM Concluding remarks
MDC/CGEM Integration
Critical items (to be fixed by in
New Aluminium ring
Separation cylinder
Clearance: already during the first Integration meeting
CGEM/MDC: ΔR~1.8mm;
CGEM/beam pipe:ΔR~10mm
Insertion Tooling
Fix the milestones & line IHEP in March
Gas System
Same as for MDC seems to be a good solution
If we choose Ar/C4H10 we need to define a max allowed leakage
Fix the IHEP in March
Cooling system:
test with cold air: not very promising
Cold liquid system: very good results from Beppe Giraudo (INFN-Torino)
Ci sono problemi per I crates dell’ elettronica off-detector Gigi e Angelo
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara

18. Mauro Savrie' INFN Ferrara
Thank You
IHEP 2017/03/14
Mauro Savrie' INFN Ferrara