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Progress and status of the SSD Lilian Martin - SUBATECH STAR Collaboration Meeting Cal. Progress and status of the SSD Lilian Martin - SUBATECH STAR Collaboration Meeting Cal. Tech, Pasadena February 2004

SSD ? • SSD = Silicon Strip Detector (SDD=SVT) • Proposed and designed to SSD ? • SSD = Silicon Strip Detector (SDD=SVT) • Proposed and designed to enhance the STAR tracking capabilities in the central region. • Double-sided silicon, 20 m in r , 700 m in z • 16 modules x 20 ladders = 320 detectors • 2 in r , -1< <+1, 1 m², 500 k channels. LM/SSD/0204

SSD Production • A year ago… – – Only one ladder built The modules SSD Production • A year ago… – – Only one ladder built The modules production slowly started The new readout boards were in design Serious geometrical interferences with the SVT appeared – Can do 6 ladders, must do 10 ladders • 6 months ago… – 10 ladders assembled (in about 3 months) – RDO been produced and geometrical problems cleared – Installation at BNL started LM/SSD/0204

SSD Installation (I) LM/SSD/0204 SSD Installation (I) LM/SSD/0204

SSD Installation (IIa) LM/SSD/0204 SSD Installation (IIa) LM/SSD/0204

SSD Installation (IIb) LM/SSD/0204 SSD Installation (IIb) LM/SSD/0204

SSD Installation (IIIa) LM/SSD/0204 SSD Installation (IIIa) LM/SSD/0204

SSD Installation (IIIb) LM/SSD/0204 SSD Installation (IIIb) LM/SSD/0204

SSD Installation (IVa) LM/SSD/0204 SSD Installation (IVa) LM/SSD/0204

SSD Installation (IVb) LM/SSD/0204 SSD Installation (IVb) LM/SSD/0204

SSD Installation (IVc) LM/SSD/0204 SSD Installation (IVc) LM/SSD/0204

SSD Integration (I) • Slow control ready (GUI, procedure on the Web) • Alarm SSD Integration (I) • Slow control ready (GUI, procedure on the Web) • Alarm Handler in progress • Online histograms being integrated LM/SSD/0204

SSD Integration (II) • Problems : – Readout board power supply failure (fixed by SSD Integration (II) • Problems : – Readout board power supply failure (fixed by the STSG) – L 2_ACCEPT (temporary fixed by the trigger Group) • The SSD does not handle correctly the L 2_ACCEPT command • The L 2_ACCEPT is currently absorbed by the SSD TCD board • The L 2_ABORT seems to work. – One RDO board refuses to talk…can not program the FPGAs via the JTAG line/protocol • Trying to identify the break on the JTAG line • Probably a long access required (West pole tip removal) – The FEE chips are loosing their bias erratically • Due to a parasitic reset signal triggered somewhere • Needs a permanent monitoring by the shift crew and a definitive fix. LM/SSD/0204

SSD Integration (III) • Few usual problems : – Connection lost with the SC SSD Integration (III) • Few usual problems : – Connection lost with the SC VME crate – LV Power supply failures – Need to pay attention to them… • The SSD runs smoothly with the other subsystems – No bad events as often seen last year – Occupancy of few percents First physics run in Jan, 15 th Since about 10 days, the SSD is in the runs on regular basis. LM/SSD/0204

ADC count First results (Pedestal and noise) Ladder 9 N-side Pedestals RMS Ladder 9 ADC count First results (Pedestal and noise) Ladder 9 N-side Pedestals RMS Ladder 9 P-side 4 2 DAQ cut : S > 5 , 1. 6 to 2 time the noise LM/SSD/0204 Strip ID

First results (Signals) P-side S ~ 56 Cluster reconstruction on both sides of the First results (Signals) P-side S ~ 56 Cluster reconstruction on both sides of the wafers N-side S ~ 47 LM/SSD/0204 Landau Fit

First Results (Cluster matching) Correlation between the strip ID of the clusters on a First Results (Cluster matching) Correlation between the strip ID of the clusters on a wafer Strip P Strip N Strip P – Strip N Crossing range = 15 strips LM/SSD/0204

First Results (Charge matching) Correlation between the total charge of the clusters on a First Results (Charge matching) Correlation between the total charge of the clusters on a wafer Signal P Cut at (Strip P – Strip N) < 10, collecting some noise… No cluster associations : Ghost hits… Signal N Signal P / Signal N LM/SSD/0204

SSD Integration (Offline) • First crude pass over the data – Common set of SSD Integration (Offline) • First crude pass over the data – Common set of cuts for all wafers/ladders : cluster reconstruction (N, S/N), cluster matching (strip ID range, total charge) – Not to bad so far… • Short term list… – Specific cuts for every wafer/ladder : quantify efficiency – Cluster association : work on cluster ambiguities – TPC track to SSD hit matching : • work on the alignment • quantify the position resolution and d. E/dx capabilities • work on tracking integration But done with independent software : must switch to the official STAR offline chain now… LM/SSD/0204

SSD Integration (software) Data • DAQReader : Ssd. Reader ready (Herb) • Reconstruction : SSD Integration (software) Data • DAQReader : Ssd. Reader ready (Herb) • Reconstruction : Existing software updated and been reviewed • St. Event : existing, cosmetic changes • ITTF : Sti. Ssd. Detector… in development • Simulation : geometry updated (Max) • Db : first table in, others hardwired in the code, extension and filling needed • Alignment : needs work, starting from St. Svt. Aligmnent ? (used for a SSD study some time ago) Hopefully more people involved : Christelle Roy (Coordinator), Abdel Boucham, Jerome Baudot, Joerg Reinarth and myself. Simulation sisdgeo. g St. Ssd. Simulation Ssd. Reader Db Geom, calibration Reconstruction Ssd. Point. Maker Alignment St. Ssd. Alignment St. Event St. Ssd. Hits ITTF Sti. Ssd. Detector LM/SSD/0204

SSD Production (I) • We intended to continue the module/ladder production after the 10 SSD Production (I) • We intended to continue the module/ladder production after the 10 first ladders but… – Had to extend the contract with Thalès for the module production – Had to hunt for / buy extra components (wafer, chips, hybrids) for the rest of the production – Were busy with the first half integration A bit over optimistic ! LM/SSD/0204

SSD Production (II) • About 50 modules already in the labs • Thalès has SSD Production (II) • About 50 modules already in the labs • Thalès has started the module production Month 01 02 03 04 05 Modules 10 30 40 40 40 • Target date is the end of May for the latest module delivery in the labs • The mechanical ladders are produced and equipped with ADC and Control boards • The 7 -ladder mechanical sectors are ready. Time to start assembling ladders again… LM/SSD/0204

SSD Final Installation • Shutdown scenario rather similar to last year : – Upgrade SSD Final Installation • Shutdown scenario rather similar to last year : – Upgrade the RDO for the next run • Getting the SSD correctly handling the L 2_ACCEPT • Adjust the internal SSD timing for 20 ladders • Needs to be done before the DAQ and Trigger go in vacations – Add an extra crate for the LV – Cone moved on the clear room roof on 06/17 back in STAR on 08/30 – Installation of the ladders on the cone while on the roof – SSD/SVT survey done on the floor – External shield before the cone rolls in the TPC Summer 2004 looks like 2003 LM/SSD/0204

SSD Final Installation 2002 2003 2004 1 ladder 10 ladders 20 ladders LM/SSD/0204 SSD Final Installation 2002 2003 2004 1 ladder 10 ladders 20 ladders LM/SSD/0204