Why does a new Varian lamp look used?
Processing is a vital step in lamp production, which aims to remove impurities from the lamp. During processing, the cathode material is heat treated under vacuum to ensure that all absorbed gases are removed. During this purification stage, a layer of the cathode material is deposited on the inside of the glass envelope of the lamp. The amount of material deposited varies, depending on the volatility of the element. The extended processing cycle and use of specially pure materials ensures dependable performance from Varian hollow cathode lamps. 1.
