Mattauch-Herzog

Mattauch-Herzog geometry. An arrangement for a double-focusing mass spectrometer in which a deflection of n/A radians in a radial electrostatic field is followed by a magnetic deflection of nil radians. 

Figure 1 Schematic diagram of a Mattauch-Herzog geometry spark source mass spectrometer using an ion-sensitive plate detector.

Mattauch-Herzog geometry, which simultaneously focuses all resolved masses onto one plane, allowing the integrating properties of an ion-sensitive emulsion to be used as the detector. Although electrical detection with an electron multiplier can be applied, the ion-sensitive emulsion-coated glass photographic plate is the most common method of detection and will be described in this article. 

Fig. 3.20. Schematic d rawi ng of a Mattauch-Herzog magnetic-sector instrument with simultaneous mass detection.

Reduction of the measurement time for element distributions is possible by simultaneous detection of several masses. This can be achieved only by use of a magnetic sector field spectrometer with Mattauch-Herzog geometry [3.49] (Fig. 3.20) and parallel detection of up to five masses by mechanically adjusted electron multipliers. 

Fig. 4.22. Mattauch-Herzog double-focusing mass spectrograph providing direction and momentum focusing of ions on a plane. [73] Reprinted from Ref. [1] with permission. American Association for the Advancement of Science, 1979.

Nowadays, forward geometry instruments are often constructed to be used in combination with an (optional) array detector, e.g., the JEOL HX-110 (EB), the Thermo Finnigan MAT 900 (EB) and the Micromass Autospec (EBE) instruments can be equipped in that way. The array detector is then located at the focus plane of the magnet, but different from the Mattauch-Herzog design it only covers a comparatively small m/z range simultaneously (Chap. 4.8). 

A high vacuum laser ion source is combined with a dynamic (ToF-MS) or static mass spectrometer (Mattauch-Herzog instrument) for the separation of the ion beams formed and used in LIMS for multi-element major, minor and trace analysis of compact solid samples (bulk analysis).74... 

Spark ion source in spark plasma by e impact plasma 50 000 ne 1 018-1019 crrr3 M+ high < 1( 4 Pa double-focusing SFMS (Mattauch-Herzog) traces, high-purity materials, geology... 

Mattauch-Herzog type mass spectrometer has double-focusing properties for ions of all masses... 

Double-focusing mass spectrometers with Mattauch-Herzog geometry and high mass resolution have been used for a long time, especially in nuclear physics, for the precise determination of exact... 

Figure 3.6 Schematicofa double-focusing sector field mass spectrograph with Mattauch-Herzog geometry with a linear imaging curve (double focusing for ions of all masses simultaneously) modified field combination with 70°. In the mass spectrograph, photographic ion detection or focal plane array detectors are used for quasi-simultaneous detection of separated ion beams. (H. Kienitz (ed.), Massen-spektrometrie (1968), Verlag Chemie, Weinheim. Reproduced by permission of Wiley-VCH)...

A mass spectrometer with Mattauch-Herzog geometry was also selected by Nier for space research due to its ability to meet the strict requirements imposed by rockets and satellites without seriously compromising performance and versatility.14... 

Recently, Hieftje et al.15-16 equipped a small double-focusing mass spectrograph built in house with Mattauch-Herzog geometry with several ion sources (such as glow discharge, an inductively coupled plasma ion source or a microwave plasma torch) and a novel array detector for simultaneous ion detection. 

Figure 5.24 Experimental setup of a double-focusing sector field mass spectrometer with Mattauch-Herzog geometry with interchangeable spark and laser ion source. (/. 5. Becker and H. /. Dietze, Int. /. Mass Spectrom. Ion Proc. 197, 1 (2000). Reproduced by permission of Elsevier.)...

SSMS - spark source mass spectrometer Mattauch-Herzog geometry ( / 10000). 

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