Unfortunately, a circuit failed after 10 hours, and the 440-metre-long string with its 24
photomultiplier tubes and five hydrophones went dead.
Yergin and his co-workers spent many months using computers to design an arrangement of elliptical and flat mirrors for efficiently reflecting and focusing the available light into
photomultiplier tubes.
On clear, moonless nights, a 10-meter-wide dish of 248 mirrors on this mountaintop focuses incoming light onto a cluster of 109
photomultiplier tubes.
These two detectors are large tanks of water with
photomultiplier tubes lining their sides.
A
photomultiplier tube converts the fluorescent light to a voltage.
A microscope focused on the sample stream, at right angles to the laser beam, collects the fluorescent light and directs it to a
photomultiplier tube for quantification.
This will use two 11-meter reflectors casting light on arrays of seven 5-inch-diameter
photomultiplier tubes.
Lumotive's complete lidar system, based on this beam steering chip, coupled with a custom silicon
photomultiplier sensor, using TowerJazz's Single Photon Avalanche Diode (SPAD) technology, will be available for prototype testing in late 2019.