The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2012
Filed:
Jul. 16, 2009
Andrew Bowdler, Staffordshire, GB;
Andrew Bowdler, Staffordshire, GB;
Kratos Analytical Limited, Manchester, GB;
Abstract
The present invention is concerned with improving the focusing of ions having a particular mass to charge ratio by optimising the electric field for the focusing of ions having that particular mass to charge ratio. In particular, the stigmatic focusing of ions can be improved by adjusting a voltage applied to an ion-optical lensfor ions of different mass to charge ratios as those ions pass through the lens. In one embodiment, a digital to analogue converterand amplifierare AC coupled to a high voltage DC power supply unitby high voltage capacitor. The digital to analogue convertergenerates a low voltage wave form which is amplified by the amplifierand then added to the output of the high voltage supplyso that the desired voltage waveform is generated and applied to ion-optical lensas ions pass through the lens.