CMS HCAL Report

1. 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

2. Hadronic Calorimeter: HCAL Had Barrel: HB Had Endcaps:HE Had Forward: HF HO HB HF HE

3. 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

4. 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

5. 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

6. 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

7. 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,

8. 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.

9. Permanent H2 Testbeam Facility

10. 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

11. HCAL Schedule Blue = Project;Green = M&O

12. 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)

13. HE RBX Assembly

14. 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

15. 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

16. 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

17. (Pre-) Production FE Card

18. 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

19. 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

20. 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)

21. HTR Rev 3 • Rev 3 will be used in the 2003 testbeam 30 built, tested & shipped to CERN

22. 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.

23. HB Module HE Module Calibration ModulesInside Readout Boxes

24. 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

25. 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

26. Fiber stuffing at CERN

27. 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

28. 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)

29. 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.

30. Recent HCAL Milestone Performance (v33)

31. US HCAL Project Resources Engineer phase out on project is mirrored by an increase of engineering staff at CERN

32. US HCAL M&O Resources M&O resources appear adequate at this point

33. US HCAL FY03 Planning