in the late 1970s, charles wilkins and gross built the second fourier transform ion cyclotron resonance mass spectrometer and were the first to use it for analytical applications. notable were the demonstrations of gc/ms, laser desorption, gas pulsing, multiphoton ionization, and the development of calibration law for accurate mass measurement. more recently, don rempel and he described an electrically compensated fticr trap to improve mass resolving power.