Scintillation Type Mass Spectrometer Ion Detector

Review of Scientific Instruments - Tập 31 Số 3 - Trang 264-267 - 1960
N. R. Daly1
1A.W.R.E., Aldermaston, Berkshire England

Tóm tắt

A new and relatively simple type of mass spectrometer ion detector is described. The positive ion is accelerated onto an aluminum surface releasing secondary electrons, and these in turn are accelerated onto an organic scintillator, viewed by a sealed-off photomultiplier. Counting methods are used to measure the ion beams. The detector has a low noise level, 4×10−20 amp, and the mass discrimination is small for ions in the high and low mass range. Admission of air to the vacuum system does not affect the gain of the detector, since no activated surfaces are situated within the vacuum. In the event of a fault occurring in the photomultiplier a new one can be substituted in a few minutes without letting air into the vacuum system.

Từ khóa


Tài liệu tham khảo

1947, Rev. Sci. Instr., 18, 739, 10.1063/1.1740838

1950, Rev. Sci. Instr., 21, 99, 10.1063/1.1745436

1950, Proc. Phys. Soc. (London), A68, 1294

1951, Proc. Phys. Soc. (London), A64, 518

1955, J. Appl. Phys., 26, 596, 10.1063/1.1722047

1954, Appl. Spectroscopy, 8, 16

1956, J. Appl. Phys., 27, 1, 10.1063/1.1722186

1957, Rev. Sci. Instr., 28, 765, 10.1063/1.1715719

Thông tin
Thông tin xuất bản

Review of Scientific Instruments

Tập 31 Số 3

264-267

Thông tin tác giả