ERAM Meeting

Monday 2 Oct 2023, 11:00 → 12:00 Europe/Zurich

Alain Delbart (Université Paris-Saclay (FR)), David Henaff (CEA), Guillaume Eurin (CEA/IRFU/DPhP), Laura-Iuliana Munteanu (CERN)

11:00 → 11:45 ERAM status

Conveners: Alain Delbart (Université Paris-Saclay (FR)), David Henaff (CEA), Guillaume Eurin (CEA/IRFU/DPhP), Laura-Iuliana Munteanu (CERN)

11:00 ERAM production status at Rui's lab

Speakers: Alain Delbart (Université Paris-Saclay (FR)), David Henaff (CEA), Guillaume Eurin (CEA/IRFU/DPhP), Laura Munteanu (CERN), Laura-Iuliana Munteanu (CERN)

• no  update on the expected delivery of the last 3 ERAMs (46,47,48). Alain will ask

11:05 Mesh pulsing

Speakers: Alain Delbart (Université Paris-Saclay (FR)), David Henaff (CEA), Guillaume Eurin (CEA/IRFU/DPhP), Laura Munteanu (CERN), Laura-Iuliana Munteanu (CERN)

• all mesh pulsing done. ERAMs remaining :
  • ERAM-38 : at cabling division. Urgent to have feedback and discuss possibility to remove the connector for which 6 pads are dead and resolder a new one
  • ERAM-42 : redo a last mesh pulsing with new cards. If still random 10 rms noise, give it for inspection at cabling division
  • ERAM-44 : ready to be glued
  • ERAM-45 : 2 dead pads in bottom right corner. Could be glued but wait for possible result of ERAM-38 repair before to decide gluing.

11:15 ERAM gluing

Speakers: Alain Delbart (Université Paris-Saclay (FR)), Charlotte Riccio (CEA-Saclay (FR)), David Henaff (CEA), Guillaume Eurin (CEA/IRFU/DPhP), Laura-Iuliana Munteanu (CERN)

• The 2 stiffeners from saclay (sandblasted at Saclay) were used for ERAM-41 and 43
• 3 stiifener at CERN. 2 should be sandblasted again. Is the last one recently found in a good state for gluing ERAM-44 ?

 

• the O-ring groove was measured by cern metrology. Dimensions are smaller than the ones in the step files. IRFU mechanical division will update the drawings and ask for the resuming of the production of the 6 new stiffeners

 

• ERAM-44 ready to be glued

 

11:20 ERAM testing

Speakers: Alain Delbart (Université Paris-Saclay (FR)), Charlotte Riccio (CEA-Saclay (FR)), David Henaff (CEA), Guillaume Eurin (CEA/IRFU/DPhP), Laura Munteanu (CERN), Laura-Iuliana Munteanu (CERN)

• ERAM-40 scan plots are missing on the cernbox. X-ray scan to be compared with ERAM-39,41 which were good
• ERAM-43 scan done. Gain curve to be done.

 

• No new ERAM to mount this week (except if ERAM-44 can be glued)

11:30 ERAM AOB

Speakers: Alain Delbart (Université Paris-Saclay (FR)), Charlotte Riccio (CEA-Saclay (FR)), David Henaff (CEA), Guillaume Eurin (CEA/IRFU/DPhP), Laura-Iuliana Munteanu (CERN)

• 16 ERAMs on bot TPC + ERAM-12 (large RC) and 35 (200 kOhm) as spares (at JPARC)

 

• Global Status of ERAMs production (to be cross checked) for TOP TPC

ERAM-07 : pb seen when bot TPC assembly (not short circuit but too much dust)

ERAM-11

ERAM-14

ERAM-15 : mounting pb on bot TPC --> checked OK at saclay --> usable

ERAM-16 : cc repaired

ERAM-20 : large gain in border

ERAM-27 : THE "surplisingly good" one from bad batch 25-34

ERAM-36 small spreading issues

ERAM-37 small spreading issues

ERAM-39

ERAM-41

ERAM-43 ?

• ERAMs considered "last choices" for TOP TPC

MM1-DLC2 (ERAM-00 in database)

MM1-DLC1

ERAM-25 : bad batch, gain gradient

ERAM-33 : bad batch, gain gradient

ERAM-34 : bad batch, gain gradient

 

ERAM-38 if not repaired (6 dead pads)

ERAM-42 if not repaired (10 rms noise randomly spread on the global surface)

 

ERAM-18 : RC/2

 

• first selection of "first choice" ERAMs for TOP TPC : 12 ERAMs + 2 ? (38 & 42 )

ERAM-07 : pb seen when bot TPC assembly (not short circuit but too much dust)

ERAM-11

ERAM-14

ERAM-15 : mounting pb on bot TPC --> checked OK at saclay --> usable

ERAM-16 : cc repaired

ERAM-20 : large gain in border

ERAM-27 : THE "surplisingly good" one from bad batch 25-34

ERAM-36 small spreading issues

ERAM-37 small spreading issues

ERAM-39

ERAM-41

ERAM-43 ?

• remaining ERAMs = 5 ERAMs

to glue/scan

ERAM-44

ERAM-45

 

to be produced

ERAM-46

ERAM-47

ERAM-48

 

• Status of FEC cards available at CERN (LPNHE has 4 FEC more FEC cards to ship to CERN for the last ERAMs) 

remaining to be used

 

15, 23, 28, 31, 59, 60, 73, 75, 76, 83