A new mass spectrograph

Abstract

The optical designs of two new types of mass spectrographs were studied. The first is a system that possesses a specially shaped magnet output boundary to satisfy the double-focusing condition for a wide mass range. The focal plane is usually curved. The second system is one in which a parallel ion beam is generated before the magnet, forming a straight double-focusing line. By introducing a quadrupole lens doublet such that the ion beam may be deflected in the same direction through the electric and magnetic fields, the overall image magnification can be arbitrarily controlled and stigmatic focusing achieved for the median ray.

An introduction to ion optics for the mass spectrograph

“…2). This change in beam direction is accommodated by incorporating a sense matrix before and after the matrix for electric sector (i.e., [SENSE][ESA][-SENSE]) (Matsuo & Ishihara, 1993); the elements of this matrix are:…”

“…2). This change in beam direction is accommodated by incorporating a sense matrix before and after the matrix for electric sector (i.e., [SENSE] Ishihara, 1993); the elements of this matrix are: Magnetic Sector. A magnetic sector consists of a north and a south magnetic pole separated by a narrow distance (no greater than about 1 cm) (Fig.…”