Two fully constructed CLEO III RICH modules were taken to Fermilab and tested in a muon beam dump.

Final results write up in postscript

First we start off with a view of two images of the detector:

A plane radiator image

A sawtooth radiator image

The green, blue and red points are detector pads which have positive signals. The crosses are reconstructed photons and the yellow patterns are Monte Carlo generated expectations of where Cherenkov photons would appear.

You can view pictures of the test beam area here:

	Setting up the equipment		Cleaning up the area
	Sawtooth radiators separated by a plane radiator		Close up view of the radiators
	Two cabled RICH modules		View of beam line

Cosmic Ray Images From Oct. 1, 1999 Run of the RICH detector

The RICH detector consists of 30 modules each with 8 windows. The detector is displayed unfolded in a flat plane even though it is to first order a cylinder. The active area of the windows is shown in yellow (or orange). The blue rectangles are hits and in the "3-D" view the height of the green line (one for each blue rectangle) is proportional to the pulse height.

Cherenkov image of a track striking a plane LiF radiator.

Cherenkov image of a track striking a sawtooth LiF radiator.

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Last updated: 23-Jan-2005 Back