Detector Design and Placement

_{Detector: Design and Placement}

The Daya Bay Nuclear Complex is the 12^th most powerful in the world (11.6 GW_th) and is looking to become the fifth most powerful by the year of 2011 (17.4 GW_th).

Where to Place the Detectors?

The anti-neutrino,

, oscillates according to the following formula:

The Reactor Complex is adjacent to the mountains, making it relatively easy to construct tunnels to reach underground laboratory with sufficient overburden to suppress cosmics rays, thus reducing the background.

Daya Bay Nuclear Power Plant

Near detector(s) is placed close to the nuclear reactor(s) to measure the flux and spectrum of

for normalization, this reduces the reactor-related systematic error.

Design of the underground tunnel that leads to the various detector sites is complete. Total tunnel length is about 3100 m. Estimated total construction cost is around 11 million dollars. The first experiment hall will be available in the near future. Total construction time is about 22 months.

The Antieutrino Detectors that will be used for this experiment employ a three-zone cylindrical detector design:

1. Target: 20 T (0.1% Gd-Liquid Scintillator)

Seven rings of photomultiplier tubes (Low-background 8" PMTs).

Far detector is placed near the first oscillation maximum ( distance of the highest oscillation probability) to achieve the highest sensitivity, this also has the advantage of reducing the effects of θ₁₂.