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Daya Bay Steve Kettell BNL Status BNL roles

Daya Bay Steve Kettell BNL Status BNL roles. Far site (EH-3) 1600 m from Ling Ao 2000 m from Daya Overburden: 350 m. Daya Bay Near (EH-1) 360 m from Daya Bay Overburden: 97 m. Total tunnel length: ~2700 m. 910 m. Ling Ao Near (EH-2) 500 m from Ling Ao Overburden: 98 m.

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Daya Bay Steve Kettell BNL Status BNL roles

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  1. Daya Bay • Steve Kettell • BNL • Status • BNL roles DOE Site Visit: Daya Bay

  2. Far site (EH-3) 1600 m from Ling Ao 2000 m from Daya Overburden: 350 m Daya Bay Near (EH-1) 360 m from Daya Bay Overburden: 97 m Total tunnel length: ~2700 m 910 m Ling Ao Near (EH-2) 500 m from Ling Ao Overburden: 98 m Large n flux Now: 14.5 GWth 2011: 17.4 GWth Ling Ao-ll NPP (turning on) 570 m Water hall Construction tunnel 730 m Ling Ao NPP LS hall entrance Daya Bay NPP DOE Site Visit: Daya Bay

  3. Goal of the Daya Bay Experiment Daya Bay has a design sensitivity of sin2213 < 0.01 at 90% CL after three years of running based on the disappearance of reactor e . — MO LS Gd-LS ~1.8 km ~ 0.3-0.5 km DOE Site Visit: Daya Bay

  4. Hall #1 (EH-1) Daya Bay hall Photo courtesy of Roy Kaltschmidt LBNL • SystemInstallation • RPC 4/11 • AD#2 6/11 • AD#1 5/11 • Water Cherenkov 1/11 • Inner pool • Outer pool • EH-1 Status • Installation ~complete • Commissioning underway • Near site `physics’ this summer 7/10/11 6/27/11 DOE Site Visit: Daya Bay

  5. EH-1 support rooms RPC gas room (BNL) Electronics room Water room (BNL) DOE Site Visit: Daya Bay

  6. Hall #2 (EH-2) Ling Ao hall RPC frame Muon PMT support 6/27/11 PMT Photo courtesy of Roy Kaltschmidt LBNL 7/7/11 DOE Site Visit: Daya Bay

  7. Hall #3 (EH-3) far hall 6/27/11 Photo courtesy of Roy Kaltschmidt LBNL DOE Site Visit: Daya Bay

  8. Hall #4 (Water Hall) • Ultra-pure water purification (BNL scope) • Component commissioning completed • Full system commissioning and EH-1 pool filling in August DOE Site Visit: Daya Bay

  9. Hall #5 (LS Hall) • BNL roles • Gd-LS recipe • QA/QC measurements • Filling support AD Filling AD#3 ready for filling 7/2/11 LS Production and Filling equipment Attenuation length is good (15m@430nm) and stable DOE Site Visit: Daya Bay

  10. SAB 7/7/11 AV#5 in SAB clean room pit 7/9/11 SSV#6 in SAB north bay DOE Site Visit: Daya Bay

  11. AD Dry Runs • The “Dry Run” comprises a full system test with a fully instrumented Anti-neutrino Detector (AD) in the Surface Assembly Building (SAB) prior to liquid filling. • AD#1–2 July, Sept 2010 • AD#3–4 May-June 2011 DOE Site Visit: Daya Bay

  12. AD#1–2 Dry Run - Extended running under extreme conditions: >1 kHz trigger rate >1.5 MB/s data rate -Scan of AD#1 using movable LEDs. -(Background from muons in acrylic.) - All PMTs functioning. - Calibration LED pattern clearly visible. - Mimic anti-neutrinos using multiple LEDs. - Analysis can separate signal / backgrounds • Dryrun of AD#1–2 demonstrate detector capability • Many improvements to electronics, offline systems • Jump-started analysis effort AD#1–2 performing well CD-4a signed 12/20/10 DOE Site Visit: Daya Bay

  13. AD#3–4 Dry Run • Comparison of 137Cs scintillator ball response as a function of z along three calibration axes in AD#1, AD#2 and MC • Good agreement. AD#3–4 performing well DOE Site Visit: Daya Bay

  14. EH-1 Commissioning • The near site run provides an opportunity to test the majority of the assumptions behind our sensitivity predictions. • The primary goals of initial operations at the Daya Bay near site are • fully calibrated muon system • fully calibrated AD pair • followed by verification of muon and AD performance and an extensive study and verification of systematic uncertainties. • The Daya Bay near site run is being preceded by analysis of simulated near site data corresponding to ~2 weeks of near site data. • Commissioning of all subsystems: Muon PMT, RPC, AD and Electronics is proceeding individually. The full system commissioning will begin in ~a month. • In addition to muon installation and commissioning responsibilities, BNL personnel have been preparing the simulation of near site data and analysis software to verify performance of the muon and AD systems. DOE Site Visit: Daya Bay

  15. EH-1 Commissioning RPC Efficiency EH-1 Muon pool dryrun April-May 2011 RPC Commissioning April-June 2011 AD#1 wet run July 2011 AD#2 wet run July 2011 Full EH-1 system August 2011 Wet run  AD with LS, no H2O in pool today Require e+ E>3.5 MeV Due to lack of H2O shield DOE Site Visit: Daya Bay

  16. Issues • Possible water intrusion due to damaged AD signal cables — mitigated by dry cable bellows • IAV#8 is 2cm taller than specifications — based on dry, wet run experience and simulation, we are confident that differences with respect to other IAVs can be understood • Competition from T2K, Double Chooz and Reno • Deployment plans for <8 AD • Maintain safety vigilance • Close out project in spring 2012 DOE Site Visit: Daya Bay

  17. Project Schedule Milestones CD4a begin Near Hall operations — Complete Mixing of 200t Gd-LS — LA Near Hall Civil Complete — First AD Pair Filling Complete — Begin DYB Hall Commissioning — DYB Near Hall Data Taking Begins — Far Hall Civil Complete — CD4b Full Operations (Apr ’13) — Far Hall Data Taking Begins — Color Key:Blue – US milestone;Red – Chinese; Black/Green– Collaboration Forecast/Actual 12/20/10 1/9/11 Mar 2011 May 2011 June 2011 July 2011 Aug 2011 Feb 2012 Summer 2012 today DOE Site Visit: Daya Bay

  18. Sensitivity Daya Bay ResearchPlanning for Success Towards OperationsScience goals • AD Dry Run (7/10-3/12) • Verify each AD • Test all elements of data chain • Integration, stability, performance • Near Site Operations (6/11-3/12) • Rates, spectra, calibration • Cosmic backgrounds, reactor n rates • Systematic errors • 3-site Ops (3/12-) phase-1 with ~6 ADs • Measure sin22q13 to ~0.03 at 90%CL • Full 3-site Ops (~6/12-) with 8 ADs • Measure sin22q13 to <0.01 at 90%CL • 3-year run • rate and spectral shape • relative detector error of 0.2% DOE Site Visit: Daya Bay

  19. BNL Daya Bay leadership • Led international simulation (Jaffe) and LS (Hahn) task forces • Lead role in the Physics and CD1-3 Reviews • Editor of Physics Proposal, CDR & TDR • Host Laboratory of US Project (with LBNL): • Chief Scientist, Chief Engineer, Safety Officer • Management of Muon system, Installation, Integration, LS, Materials compatibility, Simulation & Analysis • Leadership in Dry Run, Commissioning &Ops planning • Host of Maintenance & Operations Office • Major role in software development and analysis • Chair of Analysis Coordination Committee • BNL Project Management • L2 Muon System (Littenberg, Hackenburg) • L2 Installation (Brown, Pearson) • L2 Integration (Brown) • L3 Liquid Scintillator (Yeh) • L3 Materials compatibility (Yeh) • L3 Simulations & analysis (Jaffe) • Chief Scientist (Kettell) • Chief Engineer (Brown) • Safety Officer (Gill) DOE Site Visit: Daya Bay

  20. BNL contributions to Daya Bay • Design/Construction/Safety: Beriguete, Brown, Gill, Hackenburg, Hans, Jaffe, Kettell, Littenberg, Rosero, Wang, Yeh • Commissioning: Ling, Tanaka, Viren, Wang, Whitehead • Software: Jaffe, Viren, Wang • Simulation: Jaffe, Ling, Viren, Wang, Whitehead • Analysis: Jaffe, Kettell, Ling, Littenberg, Viren, Wang, Whitehead • Detector commissioning • Commissioning co-coordinator (Tanaka) • Relative Timing Calibration (Ling, Wang) • AD dryrun analysis (Ling, Wang) • EH-1 muon PMT analysis (Tanaka, Wang) • Trigger assessment (Wang) • Features of front-end electronics (Wang) • AD noise assessment and mitigation (Ling) • Assessment of AD ladder distortion (Whitehead) • File transfer validation (Viren) • Remote experimental control proposal (Jaffe, Viren) DOE Site Visit: Daya Bay

  21. BNL Daya Bay accomplishments(1) • Management & Installation • Muon water Cherenkov design (Brown, Hackenburg, Jaffe, Littenberg, Zhang) • Muon system management & procurement (Hackenburg, Littenberg) • Muon PMT assembly (Hackenburg, Kettell, Tanaka, Whitehead) • Gd-LS, LS recipe, production, AD filling (Yeh, Hans, Rosero, Beriguete) • LS QA/QC design, setup, testing (Yeh, Hans, Rosero, Beriguete) • Materials compatibility testing (Yeh, Hans) • Installation management, scheduling, integration (Brown) • Work controls implementation & review (Brown, Gill) • Design, procurement, operation of AGV (Brown) • Design/Safety/Readiness reviews (Brown, Gill) • Project management (Brown, Gill, Kettell) AGV 4-t Gd-LS 1/2010 Muon PMT DOE Site Visit: Daya Bay

  22. BNL Daya Bay accomplishments(2) • Software • Software framework: Development, implementation, maintenance (Viren) • Design, development, implementation and maintenance of “Fifteen” —realistic simulation of all expected effects (Viren, Wang, Jaffe) • Data model development and implementation (Viren, Wang) • File I/O development, implementation, maintenance (Viren, Wang) • Data production processing (Jaffe, Viren) • Centralized storage of auxiliary data for analysis (Jaffe) • Transient data management (Wang) • Event display (Wang) • Rolling gain method/implementation (Wang) • Validation of database filling (Viren) • Event Builder proposal (Jaffe, Viren, Wang) AD2 average gain over time DOE Site Visit: Daya Bay

  23. BNL Daya Bay accomplishments(3) • Simulation • Muon simulation in AD (Jaffe, Wang) • PMT model (Viren) • NNDC-data-driven radioactive decay kinematics generator (Viren) • Fast simulation of muons and cosmogenic background (Wang) • Modeling of liquid scintillator optical properties (Whitehead) • Validation of simulation (Whitehead) • Water attenuation using muons (Jaffe, Ling, Wang) DOE Site Visit: Daya Bay

  24. BNL Daya Bay accomplishments(4) • Analysis • Convenor of weekly simulation/analysis phone meeting (Jaffe) • Chair of Analysis Coordination Committee (ACC) (Jaffe) • Long-term analysis plans (Jaffe, Kettell, Viren) • Mock Data Challenge coordination (Jaffe) • Evaluate sensitivity loss from moving EH-3 30m closer (Whitehead) • Enumeration of non-13analyses (Jaffe) • sin2213 sensitivity evaluation (Whitehead) • Evaluation of effects of AD radial reflector (Whitehead) • Create analysis working groups (Jaffe, ACC) • Develop shift plans (Jaffe, Tanaka) • Blind analysis policy (Jaffe, ACC) • Convenor of Data Quality working group (Tanaka) DOE Site Visit: Daya Bay

  25. Summary • Measurement of q13 at Daya Bay is a key part of the US HEP program • The project is making good progress: AD and Muon installation activity are in full swing, as is EH-1 commissioning • BNL has been instrumental in dryrun and near-site commissioning/analysis • BNL has made, and continues to make, substantial contributions to Daya Bay offline software, simulation, production and data analysis. • BNL personnel have been instrumental in forming and implementing Daya Bay’s long-term analysis plan to exploit the world’s best sin2213measurement potential with the first few months of data-taking. • Concerns: • Ramp up analysis effort w/o diminishing installation & commissioning • Maintain vigilance on safety issues • Maintain onsite BNL presence (travel) • Supplemental funds in FY11 were timely and important DOE Site Visit: Daya Bay

  26. Backup DOE Site Visit: Daya Bay

  27. Personnel Changes • Departures: • Tom Russo to Michigan State (FRIB) 6/24 • Lisa Whitehead to Houston 8/12 • Ralph Brown to retire 9/30 • Expect another departure in Sept. • New Hires: • Hide Tanaka 6/1/10 • Jiajie Ling 8/1/10 (postdoc) • Chao Zhang 7/1/11 (postdoc) • Upcoming: • Postdoc • Chief engineer DOE Site Visit: Daya Bay

  28. 0.05 Sensitivity in sin2213 (90%CL) 0.04 0.03 0 1 2 3 4 5 Number of years of data taking 0.02 0.01 0. 90% C.L. DOE Site Visit: Daya Bay

  29. Hall 1 Muon Water pool Assembly Progress July 2011 June 2011 January 2011 DOE Site Visit: Daya Bay

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