The proposals and experience in production and transportation of ion beams with high brightness are discussed. The attention is concentrated on the seldom‐discussed distinctive features of high brightness beam formation in noiseless regimes of negative ion source operation. Beam quality enhancement up to level j/T=1 A/cm2eV is possible by optimization of negative ion generation, extraction, and transportation in surface plasma sources with cesium catalysis. A strong drop in brightness of a highly expanded beam, caused by fluctuating fields (the overheating through overcooling) has been observed. The magnification of the electric field fluctuations by the collapsed concentration of oscillating secondary particles is discussed. The influence of feedback by secondary particles in the excitation of large beam instabilities and fluctuating microstructure of a noiseless negative ion beam is discussed.