A new method for electrostatic ion deflection

✍ Scribed by Barbara Wolf; Paul D. Mudgett; Ronald D. Macfarlane

• Book ID: 103995465
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 841 KB
• Volume: 1
• Category: Article
• ISSN: 1044-0305
• DOI: 10.1016/1044-0305(90)80004-7

✦ Synopsis

A new approach to electrostatic ion deflection is described where an electrostatic particle guide (EPG) operating with reversed polarity is used to deflect ions in a cylindrical geometry about the axis of a time-of-flight mass spectrometer. The method has advantages over the standard parallel-plate deflector geometry in that it is more effective in deflecting ion beams that have a significant radial velocit plasma desorption mass spectrometry (252C Y component. The device is being used in =*Cf -PDMS) experiments in an on/off mode to record neutral particle spectra and in a synchronized pulsed mode to reduce the magnitude of the uncorrelated background in the time-of-flight spectrum. Radial distribution functions have been measured for various EPG voltages. Its use as a background suppression technique is demonstrated by using the 252Cf-PDMS spectrum of insulin.