Title :
Attempt to correlate the ionic model with observations in BaBar RPC chambers and R&D tests
Author_Institution :
Stanford Linear Accel. Center, CA, USA
Abstract :
The paper presents a model of ionic conduction in the Bakelite-based RPC detectors. This model explains why these detectors need to add water while they operate. The electrode current, according to the presented model, is formed mainly by the ionic sequence involving the phenol impurities left in the Bakelite and water, both left from the initial production. Similar ionic process is present in the Linseed oil polymer, where the current is carried by the fatty acid molecular impurities and by water. The Bakelite RPC operation requires the entire ionic sequence to operate smoothly to keep the electrode resistance constant.
Keywords :
electrodes; ionic conductivity; organic compounds; position sensitive particle detectors; resistors; streamer chambers; vegetable oils; water; BaBar RPC chambers; R&D tests; bakelite-based RPC detectors; electrode current; electrode resistance constant; fatty acid molecular impurities; ionic conduction model; ionic sequence; linseed oil polymer; linseed oil-covered bakelite electrodes; phenol impurities; streamer mode; water; Conductivity; Detectors; Electrodes; Impurities; Petroleum; Polymers; Production; Research and development; Testing; Voltage; RPC detectors based on linseed oil-covered Bakelite electrodes;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2004.836063
