Daya Bay Antineutrino Detector: Testing and Commissioning Dan Dwyer - - PowerPoint PPT Presentation

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Daya Bay Antineutrino Detector: Testing and Commissioning Dan Dwyer (for the Daya Bay Collaboration) Caltech Oct. 12, 2009 Daya Bay Antineutrino Detector Testing Dan Dwyer 1/14 DBD09: Oct. 12, 2009 Anti-neutrino Detector - Progress of AD

SLIDE 1

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 1/14

Daya Bay Antineutrino Detector: Testing and Commissioning

Dan Dwyer (for the Daya Bay Collaboration) Caltech

Oct. 12, 2009

SLIDE 2

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 2/14

Anti-neutrino Detector

Progress of AD

Assembly

First Step in

Commissioning: AD Dry Run

AD = Anti-neutrino Detector

SLIDE 3

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 3/14

A Busy Year

Now: Assemble 1st pair of detectors above ground Spring 2010: Transport underground and fill with scintillator. Summer 2010: Install at near site and begin taking data

SAB

Early 2010: AD Dry Run

SLIDE 4

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 4/14

Surface Assembly Building

Gate 2 Gate 1

Door Door Door Door

PMT test

AD Pit

Clean Room RPC b

Clean change

SSV

storage PMT ladder assem

Wash Area

North Bay 10 ton Overhead Crane Coverage

SLIDE 5

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 5/14

Detector Assembly

Lower 5m stainless steel vessel into pit Install 4m outer acrylic vessel

SLIDE 6

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 6/14

Detector Assembly

Install 3m inner acrylic vessel Mount PMTs on support structure and lower into vessel

SLIDE 7

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 7/14

Detector Assembly

Close lid, install calibration units, etc. Wash, rinse, repeat: 8 detectors in total. Before moving detector, opportunity to check that it all works...

→ AD Dry Run

SLIDE 8

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 8/14

AD Dry Run

1. Dark Hits:
Verify PMT readout

and system integration

2. Buffer LEDs:
Verify coordination of

Calibration and DAQ

3. Central LED:
Initial Calibration
PMT measurements:
timing offsets
gain
P/V ratio
relative efficiency
4. Off-Center LED:
Reference data for
ptical modeling

System check before filling with scintillator

SLIDE 9

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 9/14

AD Dry Run

Check instrumentation is working correctly

Labelled figure from Wei Wang.

SLIDE 10

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 10/14

AD Dry Run

HV Splitter VME DAQ Local Computing Analysis Software LEDs Driver Calibration Control FEE Trigger PMTs

Integrated test of complete AD system

AD instrumentation

SLIDE 11

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 11/14

Piecewise Integration

HV Splitter VME DAQ Local Computing Analysis Software LEDs Driver Calibration Control Display of raw data FEE Trigger PMTs Electronics DAQ Interface Calibration system at Caltech

Much progress in recent months

Photomultipliers

SLIDE 12

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 12/14

On the Road

Lift detector out

f assembly pit

Detector is moved underground for filling / installation Tranport into mine using specialized vehicle

SLIDE 13

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 13/14

A Final Note

Near Site Commissioning Run: Summer 2010 ~10,000 ͞νe per week Can study:

Reactor anti-neutrino spectrum
Backgrounds
“Identical” detector systematics

Potential for quick results! Detector systems must be tested and ready.

arXiv:0907.1896

SLIDE 14

Dan Dwyer Daya Bay Antineutrino Detector Testing DBD09: Oct. 12, 2009 14/14

Summary

Detector assembly is starting
Testing program
Ensure prompt data taking and analysis
AD Dry Run
Requires integrated test of all AD subsystems
Subsystem integration tests in progress