Mass spectrometry apparatus and method relating thereto

摘要

PCT No. PCT/GB92/01109 Sec. 371 Date Dec. 21, 1993 Sec. 102(e) Date Dec. 21, 1993 PCT Filed Jun. 19, 1991 PCT Pub. No. WO93/00701 PCT Pub. Date Jan. 7, 1993.A mass spectrometry apparatus includes means to irradiate a specimen with a beam of radiation to desorb ions for mass analysis. The apparatus comprises means for deflecting and scanning the beam and attenuator means arranged to vary the attenuation of the beam such that the attenuation is a function of the beam position in the scan.