Mass spectrometry for fundamental studies in metrology and atomic, nuclear and particle physics requires extreme sensitivity and efficiency as well as ultimate resolving power and accuracy. An overview will be given on the global status of high-accuracy mass spectrometry for fundamental physics and metrology. Three quite different examples of modern mass spectrometric experiments in physics are...

The s t u d i e s o f q u a r t z c r y s t a l o s c i l l a t o r f r e q u e n c y i n s t a b i l i t i e s show t h e y a r e n o t e n t i r e l y due t o e l e c t r o n i c s n o i s e b u t t h e q u a r t z r e s o n a t o r i t s e l f must be considered as a noise source. The prev ious inves t igat ions o f resonator f requency no ises (g iven by F. Walls) gave an i m p o r t a n ...