Present: Dejan, Andrej, Erik, Lado.
Hybrids:
Gold-plated hybrids arrived on Friday, March 12th.
Pasivated in ELOGLINE. Received on Thursday, March 19th.
Jure will buy missing components.
Hybrids (7 pieces) get equipped on Monday, March 22nd. (Jure)
Pads for bonding address lines (ADDR8,ADDR9,ADDR10) passivated. Solution: pasivation removed with a scalpel.
DistBoard:
Potenciometrers didn't arrive yet. We buy them on Monday. (Lado, Erik).
On Tuesday two boards get equipped. (2 pieces, Erik).
50-pin connectors (ERNI, SMT straight) at CERN. They get fixed there.
Mechanics:
design finished.
We have to send connector-related details (connectors connecting IB to VME module).
50-pins: known OMRON XG4E-50 or 3M 4650-6000 (later available at CERN).
LEMO: take a picture and measure the radius.
Power supply: shielded 7-pin connectors from local electronic store (Erik provides details).
The setup finished by middle of April.
Meeting again on Friday, March 26th .On Friday, April 2nd, Andrej calls from CERN.
Present: Dejan, Andrej, Erik.
Hybrids gold-plated. They arrive to Ljubljana today. Delay: 0 days.
The 50-pin straight SMT ERNI connectors should be in Ljubljana today as well.
Potenciometers ordered and expected on Monday.
We assemble 2 distBoards by Firday, March 19th.(Erik)
Hybrids to ELGOLINE for testing on Monday (on schedule). (Lado)
Wednesday by Friday: assembly of 7 hybrids with connectors, capacitors, resistors. At IJS or one of us at ELGOline.
Andrej in CERN from March 24 to April 9.
MM spoken to Carlosom: Mechanics financed by IFIC, Valencia.
Pablo optimizes design for shortest possible distBoardom to IB distance.
Through-wall connectors for IB-VME lines: 8 x LEMO, 1 x 50-pin 0.100” OMRON press-fit box-mountable connector, 6 pin power-connector.(Erik in Andrej)
All sides and the scintillators removable with cca. 10 screws for easy access.
Meeting again next Friday.
Present: Mare, Erik, Lado, Dejan, Andrej
Hybrids arrived on Tuesday, Mar 2, 1 day ahead of schedule. To CERN on Mar 8 (by car). Timeline: delay 5 days.
Gold-plating to be finished by March 12. Marko sees that done.
DistBoard equiped with 68 pin connectors and pins.
50 pin SMT male ERNI connector (#063654) to fit distBoard and connect to IB ordered at CERN. Arrives on March 12 to Ljubljana. (Lado)
Potenciometers ordered. They arrive by March 12. (Erik)
Cooling: no chiller, cool selected gas by tap water. Maintain room temperature.
Shortest possible length of cable connecting distBoard and IB is desired.
The side of the Farady box containing the source might be movable.
Meeting again next week.
Present: Erik, Lado, Dejan, Andrej
Hybrids ready as planned (Mar 3) according to Elgoline (Lado).
Neil agrees to the proposed timeline.
Hybrids will go to CERN for gold-plating on Mar 8 and not on Mar 3 because of travel conveniance.
ERNI connectors received in CERN. Marko takes them along. Available on Monday.
Cooling: Dejan talks to Pablo about a system available in Valencia.
distBoards recieved. Being equiped.
First mechanics drawings. Dejan continues commuication with Pablo.
Meeting again next week.
Present: Erik, Lado, Dejan, Andrej
Hybrids sent to producer Thursday, Feb 19. Delivery (up to gold-plating) Mar 3. Schematics and layout available on the internet.
No comments regarding timeline recieved so far.
Timeline – delay so far: 1 day.
Cooling. Dejan checks the possibilities.
Andrej simulated sparse readout on data recorded in serial readout mode.[full spectrum, inset] Noise increases significantly as the number of adjacent channels used for common mode calculation drops below 2 on each side (from 2.6 ADC sigma to 4.8 ADC sigma resolution on 241Am photo-peak at 250 ADC).
Meeting next week at the same time.
Present: Erik, Lado, Dejan, Marko, Andrej
Connectors: ERNI, on stock. Pricing: CHF 4.5 (PCB) (114805: 20, 114807:20) and CHF 13 (IDC) (40).
Order IDC cable (MM, 68 leads, 100 m).
We inform Compton mailing list. Gather comments. On Monday we check whether additions on VFP line, based on Dirk's schematic, can be made. Submit to ELGOLINE. Order 10 pieces. Schematics will be avilable.
Timeline:
hybrid at ELGOLINE on Wednesday, 18.2
Ready for gold-plating by 3.3. (Marko takes to CERN)
Gold-plated and returned to Ljubljana by Friday 12.3.
Tested by Wednesday 17.3.
Monday 22.3. ready for CERN with Andrej.
Extrapolation:
1st hybrid assembled with sensor in CERN by April 1st
5 assembled hybrids by April 9th
test of the full system (SPRINT modules and mechanics by Pablo) from May 3rd .
Move assembly to Michigan by June 1st
Collaboration gets informed of our timeline. We invite comments, especially regarding funding deadlines.
Next week at 15.30.
Present: Erik, Lado, Dejan, Marko, Andrej
Connectors ordered at CERN.
Marko informed us on the meeting with Peter Weilhammer. He stressed the following:
New chips arrived to CERN with time-walk compensation. Tests on old hybrids.
TODO: Coincident data with LJ351 module. [no data yet!]
TODO: Sparse read-out emulation on serial read-out [images 1, 2].
TODO: Design capton-cables for densly packed TAB (tape-assisted bonded) silicon detectors. Think about 2nd generation mechanics.
Enrico made design of the 68pin hybrid and distBoard. The pin-out doesn't match ours.
We continue with our design mainly because it is compatible with the mechanics. Marko talks to Peter and asks wheter Enrico's fit to the proposed mechanics.
Erik finishes hybrid design by tuesday. Start production. Gold-plating in CERN. Remove excesive copper for gold-plating.
Meeting next friday.
Present: Lado, Dejan, (Marko,) Andrej
Due to holidays of the supplier no information about the connectors yet. Inquiry for 20 sets made.
Enrico confirmed the design while making his own. Is his pin-out the same as ours? What about the mechanical properties (board dimensions, screws)? Ours is communicated to Pablo so Enrico's design should conform to ours.
Erik:
Add hole dimensions.
On Monday on the web and into production. We inform Dejan who passes the information to Pablo.
So far dimensions only.
Increase outer screw-hole radius to 8 mm: spacer thickness then 2 mm. Immediate hole surrounding should be passivated. Overall hybrid dimension is suitable.
Update till Monday. Add to the web and inform Enrico and Pablo.
Mechanics. Finished in 6 weeks, middle of March. Spacers should be plastic rather than metal. Inner diameter 4.3 mm, outer 8 mm.
Present: Erik, Marko, Vladimir, Dejan, Andrej
Andrej conntacts Technotech (386 1 56 61 084/85, email, local ERNI distributor) for connector samples etc.
Mechanics: Pablo confirms our idea and continues the design.
set the pin count to 50 for input connector (from IB). Add a ground solder pad.
Align jumpers for daisy-chained signals.
Add PCB and drilling hole dimensions.
Put schematc and layout on the web.
Finsih by tuesday, inform the collaboration. Wait for comments till the next meeting (Friday, 15.15 CET).
Hybrid: in proccess. Finished by Tuesday, Jan 27th. Put on the web and inform the collaboration. Deadline for comments -Friday, Jan 30th, 15.15.
Next meeting, international participation expected, on Friday January 30th , at 15.15.
Present: Erik Margan, Marko Mikuž, Vladimir Cindro, Dejan Žontar, Andrej Studen
New design of distBoard available on the web. Change:
add schematics,
add PCB and holes dimensions
fifth jumper,
remove pull-up resistors and asociated jumper,
make a 4-layer board ? Check with Enrico-Peter! (Marko). Put analog and power lines in the same layer.
Design by next Friday (Jan 23).
Small pitch of SAMTEC connectors, need of capton cable to connect to distBoard.
Solution: take 68 pin ERNI 1.27 mm pitch connector ( http://www.erni.com/DB/PDF/SMC/ERNI-SMC-Catalog-0900-e.pdf), exists only as SMT, for hybrid a right angle male (p. 15 – part # 114805), for distBoard a vertical male (p. 18 – part # 114807) IDC cabel connector is female (p. 31– part # 124263)
ERNI connector height is 4.2 mm over PCB plane (proposed spacer height 4.5 & 5 mm), total width 48.2 mm.
Hybrids, goldened in CERN were tested, (better proccess than in Germany), we recieve two on Monday.
Hybrid design:
Change to ERNI 68-pin connector.
Increase width and add holes for mounting.
By next Friday (Jan 23)
Mechanics: info sent to Pablo, no answer yet. PEW agrees with the stack design.
Capton and additional boards are now obsolete. Flat cable length adjustable during mounting.
Meeting next Friday (Jan 23), same time.
Present: Erik, Marko, Vladimir, Dejan, Andrej
Hybridi/chips work. (241-Am spectrum, noise, common mode, noise map, relative gain)
Hybrids from ELGOLINE (goldend in CERN) : equip 2 and sent to CERN. (Vladimir)
DistBoard design will be finished by Tuesday. (Erik) Add to the web and inform Enrico. (Andrej). ERNI connector and potentiometers on one side and capton cable connectors on the other.
Hybrid design compatible with distBoard wil lbe finished by January 16th (Erik). Add to the web and inform the Compton group (Studi)
Mechanics (Dejan confirmed Pablo's design). Based on 1 mm hybrid thickness . Hybrids fixed to grooves with latches. Alternative: put hybrids on (four) long screws fixed on base plate and separate hybrods with suitable spacers. (Dejan makes a suggestion to Pablo).
Capton cables. Double-sided. Marko talks to Carlos in CERN. Cables of graded length. Hard to count on equal cable lengths anyhow.
Dejan talks about cable lengths with Pablo. Cables should agree with current mechanic design.
Make a double-sided board to imitate SAMTEC equiped capton cable. For testing hybird – distBoard connection. (Erik)
