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