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HFT Technical Overview. STAR Detectors Fast and Full azimuthal particle identification. EMC+EEMC+FMS (-1 ≤ ≤ 4). MTD 2013. TPC. TOF. DAQ1000. HFT 2013. FGT 2011. Inner Detector Support (IDS). IDS E ast S upport C ylinder O uter S upport C ylinder
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HFT Technical Overview September 26, 2011
STAR Detectors Fast and Full azimuthal particle identification EMC+EEMC+FMS (-1 ≤ ≤ 4) MTD2013 TPC TOF DAQ1000 HFT 2013 FGT 2011 September 26, 2011
Inner Detector Support (IDS) IDS East Support Cylinder Outer Support Cylinder West Support Cylinder PIT Middle Support Cylinder PST Shrouds MSC Pixel Insertion Tube Pixel Support Tube ESC OSC Carbon Fiber Structures provide support For 3 inner detector systems All systems highly integrated into IDS Inner Detector Support WSC September 26, 2011
Detector Support • ESC,WCS and OSC used for run-12 and FGT installation. • Carbon Fiber cylinder provides mechanical and electric separation between sub-systems. September 26, 2011
Pixel Detector (PXL) Mechanical support with kinematic mounts (insertion side). Can be extracted/inserted on maintenance day ( <24 hours) after machine tune-up, or in case of failures. Insertion from one side 2 layers 5 sectors / half 4 ladders/sector 8 cm radius End view 2.5 cm radius September 26, 2011
Intermediate Silicon Tracker(IST) • Intermediate tracking layer with good r-phi resolution 250mm • Conventional Si pad detector using CMS APV chip for ladders • Readout system copy of just completed FGT detector system 24 ladders 50 cm long at 14 cm radius September 26, 2011
IST Characteristics • Liquid cooling • Carbon Fiber ladder • APD chips flex hybrid cable • <1.5% Xo • Fast detector September 26, 2011
Silicon Strip Detector (SSD) 44 cm 20 Ladders 4.2 Meters ~ 1 Meter September 26, 2011
SSD • Instrument 20 of the existing SSD ladders with new readout electronics compatible with STAR TPC readout • SSD to be installed on the Outer Support Cylinder at 20 cm • Provide cabling and cooling compatible with the IDS structure and FGT • Upgraded cooling system Air cooled. September 26, 2011
Project Schedule • Scheduled to received final approval and funding following successful CD2/3 review • Goal to complete fabrication and assembly in two years. • Install for run-13 • New small radius beam pipe. • PST support for PXL. • PXL prototype detector. Mechanical identical to final PXL detector, instrumented with fewer sectors instrumented with ladders. • Install for run-14 • Install IST and SSD detectors • Final PXL detector. September 26, 2011
PXL insertion mechanism for rapid detector replacement Courtesy Howard Wieman September 26, 2011
Air cooling of silicon detectors - CFD analysis • Silicon power: 100 mW/cm2 (~ power of sunlight) • 240 W total Si + drivers air flow path – flows along both inside and outside surface of the sector September 26, 2011
PXL detector centered in STAR in the Middle Support Cylinder (MSC) single end support allows rapid insertion and removal Can replace PXL detector with less than day of shut down September 26, 2011
Insertion and closing about the beam pipe open to clear beampipe flanges closing down fully inserted and locked in kinematic mounts September 26, 2011
insertion mechanism cam and guides control lateral location during insertion carriage rides on support rails mechanical release to transfer load to kinematic mounts hinge mechanism for lateral motion kinematic mounts engage at center position thin carbon half tube for PXL support and cooling air duct September 26, 2011