GB935904A - Improvements in or relating to x-ray shadow microscopes - Google Patents
Improvements in or relating to x-ray shadow microscopesInfo
- Publication number
- GB935904A GB935904A GB30923/59A GB3092359A GB935904A GB 935904 A GB935904 A GB 935904A GB 30923/59 A GB30923/59 A GB 30923/59A GB 3092359 A GB3092359 A GB 3092359A GB 935904 A GB935904 A GB 935904A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- stigmator
- electrostatic
- electrons
- stigmators
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K7/00—Gamma- or X-ray microscopes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
- H01J35/147—Spot size control
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
935,904. X-ray tubes. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 13, 1959 [Sept. 13, 1958], No. 30923/59. Class 39 (1). An X-ray shadow-microscope comprises an X-ray tube having an adjustable electron optical lens system 19, 20, 21 arranged to focus a first electron beam travelling from a cathode 9 to a small spot on a target 18 so as to produce X-rays arranged to impinge on a first fluorescent screen (outside the tube) a second fluorescent screen 14 arranged on the cathode side of the magnetic electron optical system 22, 23 and arranged to intercept a second beam of secondary electrons emitted from a spot on the target 18 and passing through the lens system, so as to indicate an image of the spot on the target 18, a magnetic stigmator 27 having a plurality of energizable magnetic poles arranged symmetrically about the two beams of electrons in which adjacent poles are arranged to have opposite polarities and an electrostatic stigmator 30 having a plurality of energizable electrodes arranged symmetrically around the two beams of electrons in which adjacent electrodes are arranged to have opposite polarities, the arrangement being such that the magnetic and electrostatic stigmators each have astigmatisms which are separately adjustable in value and direction, whereby the stigmators 27, 30 serve to correct the axial astigmatism of the system 22, 23. The magnetic stigmator is first adjusted to exhibit the direction of astigmatism of the lens and this is then corrected by the electrostatic stigmator, in a way which is fully described in the Specification. The stigmators 27, 30 may be interchanged in position or may both be on the same side of the electron optical system. The eight magnetic rods 27 may have energizing coils 28 and are sealed through non-magnetic rings 29. Alternatively a quadrupolar magnetic system may be used, the poles being rotatable about the common axis. The electrostatic stigmator 30 has eight electrodes. Polepieces 15 produce a transverse magnetic field to separate the initial and returning electrons.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL231359 | 1958-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB935904A true GB935904A (en) | 1963-09-04 |
Family
ID=19751345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30923/59A Expired GB935904A (en) | 1958-09-13 | 1959-09-13 | Improvements in or relating to x-ray shadow microscopes |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3030506A (en) |
| CH (1) | CH375544A (en) |
| ES (1) | ES251987A1 (en) |
| FR (1) | FR1235118A (en) |
| GB (1) | GB935904A (en) |
| NL (1) | NL108506C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4134999A4 (en) * | 2020-04-13 | 2024-04-24 | Hamamatsu Photonics K.K. | X-ray generator and x-ray generation method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR944238A (en) * | 1947-03-13 | 1949-03-30 | Csf | Electronic optics correction method |
| BE481554A (en) * | 1947-06-26 | |||
| DE899095C (en) * | 1948-10-15 | 1953-12-07 | Siemens Ag | Arrangement on a transmission electron microscope |
| US2866113A (en) * | 1952-10-07 | 1958-12-23 | Cosslett Vernon Ellis | Fine focus x-ray tubes |
| US2877353A (en) * | 1954-07-14 | 1959-03-10 | Gen Electric | X-ray microscope |
| US2802111A (en) * | 1955-05-11 | 1957-08-06 | Rca Corp | Electron microscope alignment device |
| NL214670A (en) * | 1957-02-16 | 1900-01-01 |
-
0
- NL NL108506D patent/NL108506C/xx active
-
1959
- 1959-07-24 US US829252A patent/US3030506A/en not_active Expired - Lifetime
- 1959-09-10 CH CH7806059A patent/CH375544A/en unknown
- 1959-09-10 ES ES0251987A patent/ES251987A1/en not_active Expired
- 1959-09-11 FR FR804962A patent/FR1235118A/en not_active Expired
- 1959-09-13 GB GB30923/59A patent/GB935904A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4134999A4 (en) * | 2020-04-13 | 2024-04-24 | Hamamatsu Photonics K.K. | X-ray generator and x-ray generation method |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1235118A (en) | 1960-07-01 |
| US3030506A (en) | 1962-04-17 |
| CH375544A (en) | 1964-02-29 |
| NL108506C (en) | |
| ES251987A1 (en) | 1960-01-01 |
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