DOE Site Visit: Daya Bay7/18/20111 Daya Bay Steve Kettell BNL 1)Status 2)BNL roles

DOE Site Visit: Daya Bay 17/18/2011

Daya Bay

Steve KettellBNL

1) Status2) BNL roles


Daya BayNPP

Ling AoNPP

Ling Ao-ll NPP(turning on)

Total tunnel length: ~2700 m

73

0 m

570 m

910 m

Daya Bay Near (EH-1)360 m from Daya BayOverburden: 97 m

Ling Ao Near (EH-2)500 m from Ling AoOverburden: 98 m

Far site (EH-3)1600 m from Ling Ao2000 m from DayaOverburden: 350 m

Water hall

LS hall

Constructiontunnel

entrance

Large n fluxNow: 14.5 GWth

2011: 17.4 GWth


Goal of the Daya Bay ExperimentDaya Bay has a design sensitivity of sin2213 < 0.01 at 90% CL afterthree years of running based on the disappearance of reactor e .

~1.8 km

~ 0.3-0.5 km

Gd-LS

LSMO

Pee 1 sin2 213 sin2 m312L

4E

cos4 13 sin2 212 sin2 m21

2L

4E

—


Hall #1 (EH-1)Daya Bay hall

System Installation• 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

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7/10/11


EH-1 support rooms

Electronics room

RPC gas room(BNL)

Water room(BNL)


RPC frameMuon PMT support

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Hall #2 (EH-2)Ling Ao hall

PMT


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NLHall #3 (EH-3)

far hall

6/27/11


Hall #4 (Water Hall)

Ultra-pure water purification (BNL scope)• Component commissioning completed• Full system commissioning and EH-1 pool filling in August


Hall #5 (LS Hall)

LS Production and Filling equipment

AD Filling

BNL roles• Gd-LS recipe• QA/QC measurements• Filling support

Attenuation length is good (15m@430nm) and stable

AD#3 ready forfilling 7/2/11

DOE Site Visit: Daya Bay 10

SAB

7/18/2011

SSV#6 in SAB north bay

AV#5 in SAB clean room pit

7/9/11

7/7/11


AD Dry Runs

7/18/2011

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


- All PMTs functioning.- Calibration LED pattern clearly visible.

- Dryrun of AD#1–2 demonstrate detector capability

- Many improvements to electronics, offline systems

- Jump-started analysis effort

AD#1–2 Dry Run

- Mimic anti-neutrinos using multiple LEDs.- Analysis can separate signal / backgrounds

-Scan of AD#1 using movable LEDs.-(Background from muons in acrylic.)

- Extended running under extreme conditions: >1 kHz trigger rate >1.5 MB/s data rate

7/18/2011

AD#1–2 performing wellCD-4a signed 12/20/10


AD#3–4 Dry Run

7/18/2011

• 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


EH-1 Commissioning

7/18/2011

• 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.


RPC Efficiency

EH-1 Commissioning

7/18/2011

EH-1 Muon pool dryrun April-May 2011RPC Commissioning April-June 2011AD#1 wet run July 2011AD#2 wet run July 2011Full EH-1 system August 2011

today

Wet run AD with LS, no H2O in pool

Require e+ E>3.5 MeVDue to lack of H2O shield


Issues

7/18/2011

• 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


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 —

12/20/10 1/9/11Mar 2011May 2011June 2011July 2011Aug 2011 Feb 2012Summer 2012

Forecast/Actual

Color Key: Blue – US milestone; Red – Chinese; Black/Green – Collaboration

today

7/18/2011


Sensitivity

• 3-year run• rate and spectral shape• relative detector error of 0.2%

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


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 CommitteeBNL 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)


BNL contributions to Daya Bay

7/18/2011

• 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)


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)

BNL Daya Bay accomplishments(1)

4-t Gd-LS1/2010

AGV

Muon PMT


AD2 average gain over time

7/18/2011

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)



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)



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-13 analyses (Jaffe)• sin2213 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)



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 sin2213 measurement 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


Backup


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


90% C.L.

0 1 2 3 4 5

0.05

0.04

0.03

0.02

0.01

0.

Number of years of data taking

Sen

sitiv

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sin

2 2 1

3 (9

0%C

L)


Hall 1 Muon Water pool Assembly Progress

January 2011

7/18/2011

June 2011

July 2011

Documents

DOE Site Visit: Daya Bay7/18/20111 Daya Bay Steve Kettell BNL 1)Status 2)BNL roles