Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Albert V. Crewe"'
Autor:
Albert V. Crewe, Peter D. Nellist
Publikováno v:
Handbook of Charged Particle Optics ISBN: 9781315219882
The scanning transmission electron microscope (STEM) was a rediscovery or reinvention whose conception was based on techniques and processes in nuclear physics, and it was lamentably ignorant of any precedent. This chapter is concerns the principles
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb67471c4d0d4a7bcc3da9c9f4a6f62e
https://doi.org/10.1201/9781420045550-10
https://doi.org/10.1201/9781420045550-10
Autor:
Albert V. Crewe
Publikováno v:
Physics Today. 60:45-50
Scientists can and must take the initiative in helping society solve such problems as air and water pollution and crime. We need new instruments to measure pollution and new ways to reduce it. Because the crime rate is rising so rapidly, we require n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f2cc718ba1522ad487e2a8b159f48a5
https://doi.org/10.1063/1.2761802
https://doi.org/10.1063/1.2761802
Publikováno v:
Journal of Microscopy. 223:140-149
We have developed an instrument control and image acquisition system for use with scanning electron microscopes. By making the system flexible over a wide range of operating voltages, scan generation and image acquisition modes can be easily accommod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9240ced19ec37e3888af79d0c6afc6ef
https://doi.org/10.1111/j.1365-2818.2006.01605.x
https://doi.org/10.1111/j.1365-2818.2006.01605.x
Autor:
Igor Gorodezky, Albert V. Crewe
Publikováno v:
Optik. 117:15-20
Electrons from a source in a solenoidal magnetic field emerge from that field with a characteristic angular momentum. This behavior can be used to produce a flat ribbon-like electron beam with zero thickness (to first order). We show that this can be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df75f97f7a2109a13c8d58a151217fad
https://doi.org/10.1016/j.ijleo.2005.05.005
https://doi.org/10.1016/j.ijleo.2005.05.005
Publikováno v:
Review of Scientific Instruments. 75:4732-4741
We have modified a scanning electron microscope (SEM) in an attempt to produce a miniature free electron laser that can produce radiation in the far infrared region, which is difficult to obtain otherwise. This device is similar to the instrument stu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0fb3e76c87bd23db2aa1b325b2f4bc9
https://doi.org/10.1063/1.1808894
https://doi.org/10.1063/1.1808894
Autor:
Albert V. Crewe
Publikováno v:
Microscopy and Microanalysis. 10:414-419
This article presents my reminiscences of the work in Chicago on the correction or reduction of lens aberrations. Studies began in the early 1960s and extended over a period of almost 40 years, although it was never the primary focus of the work of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7665b3dd9907348f9b8590c504df26ae
https://doi.org/10.1017/s1431927604040085
https://doi.org/10.1017/s1431927604040085
Autor:
Albert V. Crewe
Publikováno v:
Optik. 115:31-35
Summary We describe an investigation into the focusing properties of magnetic fields of the form kz n for all integer n . With two exceptions, the trajectories can be expressed as a linear sum of Bessel functions of the first and second type, of orde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46bc5bca53fd44ff9ed880232ea37578
https://doi.org/10.1078/0030-4026-00317
https://doi.org/10.1078/0030-4026-00317
Autor:
O. H. Kapp, Albert V. Crewe
Publikováno v:
Journal of Microscopy. 209:47-55
We have previously shown that a dipole lens has superior properties that are particularly suited for use in a low voltage scanning electron microscope (SEM) (Tsai & Crewe, 1996). The aberrations are lower than for any other type of lens and lead to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::011d9d78e52d743e0ff68ece34dd6d6d
https://doi.org/10.1046/j.1365-2818.2003.01096.x
https://doi.org/10.1046/j.1365-2818.2003.01096.x
Publikováno v:
Journal of Microscopy. 197:110-117
When a uniform magnetic field is superimposed on a uniform electrostatic field, the combination can act as a magnetically focused mirror. This mirror is predicted to have aberrations of opposite sign to those of a magnetic lens and may therefore be u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f349fc5a522a85dc024c401a5f00b1e2
https://doi.org/10.1046/j.1365-2818.2000.00649.x
https://doi.org/10.1046/j.1365-2818.2000.00649.x
Autor:
Albert V. Crewe
Publikováno v:
Journal of Microscopy. 178:93-100
SUMMARY The performance of many electron optical instruments is fundamentally limited by the dimensions of the focused probe. This is true of the scanning electron microscope and the scanning transmission electron microscope and, by inference, it may
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::740422bbb47783d2b421a5d9c464b60f
https://doi.org/10.1111/j.1365-2818.1995.tb03584.x
https://doi.org/10.1111/j.1365-2818.1995.tb03584.x