Post on 03-Jan-2016
description
IFR-LST status report
G. CibinettoINFN Ferrara
Babar Collaboration Meeting, Feb. 21, 2004
• Milestones
• LST production status
• 1st module assembled
• Princeton workshop
• Strips production
• Electronics
• High Voltage
• Software
• Dec 15 ’02 -- BaBar chooses LST for IFR Upgrade• June 12 ‘03 -- EPAC Review Approves LST Proposal • June 15 -- Cost/Schedule/WBS prepared• June 22 -- INFN Gruppo Uno Evaluation • June 27 -- BaBar IFC Approves Project• June 30 -- Large/Small Cell Decision• July 17 -- Electronics Design Review • Aug 1 -- Place Orders for Tubes & Small parts• Aug 26 -- Q/A Review • Aug 27 -- Install Test Module in BaBar• Sept 3 -- Fire safety approval for materials (tubes, strips, cables)• Oct 1 -- Decide to read out Phi via wire signals instead of strips• Oct 22 -- Mechanical, Schedule (Installation) & Budget Review• Nov 10 -- Tube Production begins! • Nov 30 -- Orders placed for components: electronics, crates, HV
system, signal cables, HV cables• Dec 15 -- Phi Readout plane & Z-strip production begins at SLAC• Dec 18 -- First shipment (~5%) of tubes to Princeton/OSU• Jan 7 ’04 -- Q/C systems operational at OSU, Princeton• Jan 9 -- First module assembled at Princeton• Jan 14 -- First module passes Q/C tests• Feb 9 -- 168 “standard” tubes shipped to Princeton
LST Milestones successfully passed
• Mar 1 -- 168 tubes (partially 7-cell and layer 18) shipped to Princeton
-- Electronics tests begin -- 2% of modules shipped to SLAC• Mar 15 -- Q/C system operational at SLAC, Crate delivered• Apr 2 -- 320 Tubes shipped to Princeton -- Installation tooling complete• Apr 10 -- Electronics complete• Apr 15 -- Gas system assembled, under test at SLAC -- Electronics, crates, HV shipped to SLAC• Apr 30 -- 336 tubes shipped to Princeton• May 4 -- Installation Readiness Review• May 20 -- Ship all modules for 2 sextants to SLAC • May 25 -- Final 334 Tubes shipped to Princeton• May 27 -- Q/C begins at SLAC• Jul 31 -- LST module construction complete (6 sextants+spares)• Aug 1 -- RPC removal begins• Aug 15 -- Installation of 2 sextants begins• Oct 8 -- Installation of 2 sextants complete• Oct 15 -- Run 5 begins• Jul 2005 -- Install remaining 4 sextants
LST Remaining Milestones
LST production at Pol. Hi. Tech.
LST production status
LSTs in the conditioning station
Operations in the clean room
LST production status
• Tubes production started at Pol. Hi. Tech. on Nov. 10
• Since mid. Decembre 15 tubes/day assembled
• Up to now more than 500 LSTs assembled
produced 564
passed HV conditioning 302
passed plateau 272
passed scan test 212
shipped 192
waiting for conditioning 121
under conditioning 132
waiting for source scan test 50
under long term test 30
8-cell tubes production for the 2 sextants to be installed in 2004 finished.
Next Monday will begin the production of 7-cell tubes.
24 before Xmas168 on Feb. 9
0
100
200
300
400
500
600
produced underconditioning
passedconditioning
passedplateau
passed scantest
passed longterm test
shipped
LST production status
• The Quality Control system is fully integrated with the production.
– The system can handle the number of tubes produced daily by the factory.
– Babarians work is fundamental for the diagnostic and the quality certification of the chambers. INFN provides 3 shifters + a production manager per week.
– The QC system can identify systematic and random defects of the tubes.
– The source scan test has been added
to the standard QC procedure.
So far ~30 tubes rejected by the QC system
First 24 tubes arrive Jan 2 in Princeton
Test stand in operationin Hi-Bay area
All tubes survived the trip
Performance of first 24 tubes – HV plateaus
All 24 tubes show good plateau
All tubes are still working properly
First production module assembled Jan 9
Princeton workshop – Jan 30/31
Installation
Connections Routing Layer 18 Module testing
High Voltage
Connector Protection
Software
Task list Planning
Organization
Installation logistics
Electronics
Electronics tests
Installationmechanical summary and utilities
Inside steel Backward end: z strip readout, HV connections Forward: strip readout
Radial conduit An “incremental conduit” is the plan for bringing the utilities out. With the incremental
conduit a section of conduit goes in with every layer leaving the most available working space for succeeding layers
HV connector and cables (we have an expert, Dave Warner from Colorado State) To avoid the entire length of the high voltage cable to be handled during installation. They should be placed outside the detector in an area where the HV cables leave the
conduit.
Installationmechanical summary and utilities
Z-Strip Routing: Placement of the readout lines of the z-strip was of major concern due to the
limited space for the utilities. We came up with a viable solution for the top and bottom sextants by attaching
them to the sides of the center gap plate. This solution is very space efficient but only works in the top and bottom sextant The side sextant solution is under discussion.
Layer 18 All the utilities must be accessed from the forward end because of the existing
flux bars that seal this layer The solution is to get the utilities organized in the gap so the flux bar could be
replaced without crushing them Since this layer is sealed by the flux bar extensive testing needs to be done prior
to the replacement of the flux bar
Backward side utilities installation:
transition board and HV connectors
Sketch of the forward side with the space for the strip readout
Installationmechanical summary and utilities
Strip production @ SLAC
planes production status
• 550 cables received.
• Plane production is underway in End Station A
• 2 shifters working at a time with production manager
• 10 planes produced per bake cycle
• May be able to do 2 cycles per day
• 68 “2 by 8” planes produced so far
• 50 planes shipped to Princeton
• 24 “layer 18” planes also produced
Flexible Flat Cable (FFC): 100 mils pitch
z planes production status
• 3 "1 module wide" prototype planes produced
– 1 installed in BaBar during last ROD – 1 to be shipped to Princeton – 1 to be used in tests at SLAC
• For production planes the main issue is the cable length.
• There are 216 different lengths of cables needed
• We need to know/control the lengths to better than 1 cm
• Current plan is – Buy bulk cable from Parlex – Cut to length here at SLAC – Send cables back to Parlex for
etching – Send cables to Cable Connection for
crimping
z planes production is postponed after the plane for 2004 installation will be finished.
Readout front end electronics
Input Analog Daughter (IAD) card INFN -TO
12 prototypes ready andtested
Order for full production placed
Amount for 2004 installation ready by the end of march
LST-FE card INFN -FE
3 prototypes ready and tested Order for full production placed
.Amount for 2004 installation
ready by the end of march
Readout front end electronics test
Prototype of mother board + IAD tested in Princeton on the first module prototypewith transition board for wire signals + and strip readout
LST Crate, Crate Service Card and FSD
+5V - 5V
LCD
CAN_BUS
+5V_CTRL
CAN_VCC
CAN_ACT
CAN_DOM
STATUS MODE ON/OFFREMOTERM_ON
LST CRATE INFN -GE
Material for 13 crates ordered
Backplane and CSC/FSD board ready by the mid of march
Layout of the BaBar LST crate
High Voltage
80 channels/box1:4 Fan out (“per tube”)Up to 4 diff. voltagesCurrent MonitorZEUS over-current protection Canbus, EthernetInterlocksUses external HV supply
Prototype under construction
Production ready by mid April
Software
• reconstruction.– Revisit 1-D clustering (currently it can connect non-adiacent strips to deal with
dead FECs)– Investigate possible effect of constant pitch – Teach the swimmer (KalmanFilter based) about the dead spaces.
• efficiency monitoring.– Test current code on LST (each tube is smaller than an RPC)
• software for cosmic runs– Reuse the code already available (IfrCosmic) – Useful to analyze cosmics in teststand and then to debug detector at the end of
installation (first cosmic runs).
• muonID algorithm– Revisit the current selectors – Study discriminant variables, feedback to reconstruction tweaking – Introduce dependance in barrel.
LST Summary
• Success of first module validates construction and testing procedures.
• Now in full Production at PHT.– 15 tubes per day– Q/C is able to keep up– Shipments scheduled
• Assembly sites at Princeton and OSU in operation
• Strip planes in production at SLAC
• Installation, Electronics, HV, etc. under control and on schedule for summer installation of 2 sextants.
• Major challenge: maintaining quality and schedule