OBSERVATION OF LIGHT FROM RESISTIVE PLATE CHAMBERS

Electrically induced signals and light emissions from Restrictive Plat e Chamber (RPC) are simultaneously measured using a glass RPC with tra nsparent high-voltage planes, operating in the streamer mode. With one exception, good correspondence is seen in between the electrical and optical signals in every aspect: signal shapes, pulse heights, timing and afterpulses. The one exception is a possible limiting effect obser ved on the optical signal pulse height for a given pulse height of ele ctrically induced signal. Shapes of the signal visually observed by ey e are also described.