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CMS HCAL Report. US CMS HADRON CALORIMETER REPORT Andris Skuja University of Maryland US CMS Annual DOE/NSF Review Brookhaven National Laboratory May 19, 2003. Hadronic Calorimeter: HCAL. Had Barrel: HB Had Endcaps:HE Had Forward: HF. HO. HB. HF. HE. HCAL : HB Calorimeter (Barrel).
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CMS HCAL Report • US CMS HADRON CALORIMETER REPORT • Andris Skuja • University of Maryland • US CMS Annual DOE/NSF Review • Brookhaven National Laboratory • May 19, 2003
Hadronic Calorimeter: HCAL Had Barrel: HB Had Endcaps:HE Had Forward: HF HO HB HF HE
HCAL : HB Calorimeter (Barrel) Sampling calorimeter: brass (passive) & scintillator (active) Coverage: |h|<1.3 Depth: 5.8 lint (at h=0)segmentation: f x h = p resolution: ~ 120 %/ 0.087x0.087 17 layers longitudinally, f x h = 4 x 16 towers Completed & assembled 20o f
HCAL : HO Calorimeter (Outer) Total number of lint till the last sampling layer of HB is < 8 HO: 2 scint. layers around first m layer (extend to~11 lint ) Test Beam 2002 ~ 5% of a 300 GeV p energy is leaked outside the HB HO improves p resolution by ~10% at 300 GeV & linearity Ring 0 Ring 2 Ring 1
HCAL : HE Calorimeter (Endcap) Sampling calorimeter: brass (passive) & scintillator (active) Coverage: 1.3<|h|<3 Depth: 10 lint segmentation: f x h = p resolution: ~ 120%/ 0.087x0.087 19 layers longitudinally 20o Completed, assembled, HE-1 installed
HCAL : HF Calorimeter (Forward) Steel absorbers, embedded quartz fibres // to the beam Fast (~10 ns) collection of Cherenkov radiation. Coverage: 3<|h|<5 segmentation: f x h = Depth: 10 lint 10o x 13 h towers Fiber insertion finished by Nov 03
HCAL : HE and HB HB complete, install onboard electronics by Q2-04 Back-flange 18 Brackets 3 Layers of absorber HE-1 re-installed on YE-1 in Jan/Feb 2003. Only 3mm droop. Mount HE+1 by end of 2003,
HB Both HCAL half-barrels are complete and in their alcove positions at the CMS hall. Starting in Autumn 03, electronics will be installed. After a burn-in period, vertical slice operations will begin and continue until the CMS magnet test in late 2005.
HCAL Completion and M&O • HCAL Deliverables are stand-alone working calorimeter modules (HB+, HB-, HE+, HE-, HF+, HF-, 5 units of HO) that are installed and cabled up, but not operating in an integrated manner. This will be done by early ’04. • Delivery includes HPD’s, Electronics (FE/TRIDAS) and Optical Links from Detectors to Underground Counting Room • Test beam calibration (’02, ‘03) is NOT M&O • Spares and components needed to keep HCAL operational are NOT M&O. • There is a vertical slice operations period before installation underground. This is a period of M&O • Test beam studies called for by operational experience IS M&O (’04 onward) • Technicians and engineers required to keep an operating sub-component of HCAL operating (independent of when) ARE M&O • Physics and simulation software development, calibration data base maintenance IS M&O
HCAL Schedule Blue = Project;Green = M&O
RBX Status • Efforts in the previous calendar year have been dominated by preparations for test beam. • The RBX’s house RMs which contain photodetectors (HPD’s for HB and HE), the Front End electronics and Optical Links all in a single Unit. They also house LV/HV Units, Calibration Units and Control Modules. • The HB RBX’s are complete, except for • Need to complete cooling channels for full RM production (for 160 units) • Need CCM (40 units) • Need Calibration modules (40 units) • Need LV modules (40 units) • Services/integration items • The HE RBX’s are complete except for the items above • The HO RBX design is being finalized (including RM’s)
SBS CLK D C C CAL REGIONAL TRIGGER H T R H T R H T R 16 bits @ 80 MHz TTC 32 bits @ 40 MHz QIE CCA GOL QIE QIE CCA QIE GOL QIE CCA QIE FE/DAQ Electronics S-Link: 64 bits @ 25 MHz Trigger Primitives READ-OUT Crate Rack CPU 12 HTRs per Readout Crate, 2 DCC FRONT-END RBX Readout Box (On detector) HPD Shield Wall Fibers at 1.6 Gb/s 3 QIE-channels per fiber FE MODULE
HPD Acquisition & Testing • R&D phase over except for • Understanding a few odd-acting tubes: • Continuing lifetime tests under several different HV conditions Understanding the test beam data from last summer Irradiation of selected tubes • Status: • Of the 88 still in house, 32 are fully tested, but not yet graded • The 56 left are mostly tested. • We have accepted 92 and rejected 22 (which have been returned) • We have 22 in standby (small discrepancies or odd behavior) • The best guess for yield is therefore 114/136 = 84%, since the standby category would have technically met our contractual specifications. • Out of 224 production tubes at UMN, 136 have been fully tested/graded
Front End Electronics • Principal components: 1. QIE (charge integrator and encoder) Fermilab ASIC • Production wafers are in hand (QIEs meet specs) • Noise levels 3000-4000 electrons rms 2. CCA (channel control ASIC) Fermilab ASIC. Packaged & tested Production chips are in hand 3. GOL (gigabit optical link) CERN ASIC • Proto GOL ASIC tested - ok • Gigabit Ethernet protocol at 1.6 Gbits/s • 2 Engineering wafers back from Fab. – have been packaged and are being tested • Design work under way for GOL tester 4. L4913 (rad hard voltage regulator) STC ASIC from CERN specifications 5. HFE419X-521 (connectorized VCSEL diode) Honeywell standard 2.5 Gbit/sec device
FE Status Summary • Steady Progress QIE development/bench studies – began 1999 • Front-end electronics are on schedule Very little schedule float for GOL Infrastructure at SX5 for burn-in and slice tests must be provided 200 Pre-prod cards have been built Feb/Mar’03 3. Ramping up the nested production, test and assembly lines for readout modules 4. Complete analysis of board level radiation testing 5. Full Production to start July/Aug. ‘03 6. Development of a low-noise cable and connector configuration for the HF photomultipliers
HCAL TRIDAS/DAQ STATUS • Collaboration of BU, Fermilab, Maryland and Princeton • Consists of HTRs, DCCs, Clock, PC Interface • Status of Principal Components • DCC: final boards are produced, firmware in progress • HTR: Test Beam prototypes are finished, Firmware in progress, checkout for production boards this summer. Final production anytime after that. • Clocking scheme is defined and prototypes done • PC interface is specified and well understood
Data Concentrator (DCC) • Pre-Production Prototype • All (known) hardware features are implemented • Firmware underway for TB03 - similar to final • 2 units under test;8 more ready to stuff • Based on D0/CMS motherboard and link cards (all produced) S-Link 64 at front panel Maryland TTCRx Mezzanine TTC, sTTS (RJ-45's on front panel)
HTR Rev 3 • Rev 3 will be used in the 2003 testbeam 30 built, tested & shipped to CERN
HCAL Calibration • Goal: Calibrate from test beam to 3 TeV. • Time HCAL electronics. • Monitor performance, including radiation damage. • Tools: 1.Nitrogen laser distributed to each sub-detector. Excites scintillator • 2.Laser injects light to photo-detectors. • 3.LEDs (fast) inject light to photodetector. Programmable pulser. • 4.Moving wire radioactive source for long term calibration. • 5.Charge injection to ADC’s (QIE). • Specialized calibration modules designed and built to achieve goals.
HB Module HE Module Calibration ModulesInside Readout Boxes
HCAL DCS Status • DCS is the Detector Control System. It monitors the Detector and performs what used to be called “Slow controls” • The low level servers of HCAL control subsystems are almost ready. • All defined server prototypes tested during beam-test in June-September of 2002. Bugs found and fixed. • HCAL is in the vanguard of DCS on CMS
HF status • The HF is a diversified project consisting of contributions from many nations as well as CERN. • All detector mechanical components (wedges, strongbacks, backplanes) have been delivered ahead of schedule and are at CERN. • Production of HF tables is well advanced: for the first one, the welding and thermal treatment is done and is being machined now, for the second, the welding is complete. • Production of the support outer shield has started for the first HF. Contracts for machining placed. Expect delivery of first table+shields at end of September 03. Second set by spring 2004. • All PMTs have been delivered to IOWA and testing is >90% complete • 85% of quartz fibers have been delivered to CERN and are being cleaved and bundled in Hungary • 21/36 wedges will be completed in May ‘03
HCAL M&O • There was a Lehman review at FNAL on April 8, 9 & 10. The M&O proposal for CMS was baselined (budget approved). • Engineering personnel and techs at CERN for detector maintenance (shared with EMU) • “Slice Test” as pre-ops during 2004-2006 • Test Beam work beginning in 2004 • Physics monitoring at CERN
US HCAL Status • Remaining taks: • Finish FE/TRIDAS electronics • HPD acquisition & testing • Finish RBX’s, RM’s,Calibration Modules • Contingency use: • Electronics • Optical Links • Scope expansion (including HF fiber) • Endgame risks: • HPD schedule (also drives RM completion)
US HCAL Transition to M&O • We expect a smooth transition from Project completion to Pre-ops (M&O phase) if HPD delivery finished in ’03.
US HCAL Project Resources Engineer phase out on project is mirrored by an increase of engineering staff at CERN
US HCAL M&O Resources M&O resources appear adequate at this point