GB852181A - Magnetic focusing systems for travelling-wave tubes - Google Patents
Magnetic focusing systems for travelling-wave tubesInfo
- Publication number
- GB852181A GB852181A GB2449659A GB2449659A GB852181A GB 852181 A GB852181 A GB 852181A GB 2449659 A GB2449659 A GB 2449659A GB 2449659 A GB2449659 A GB 2449659A GB 852181 A GB852181 A GB 852181A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- field
- travelling
- rings
- wave tubes
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
- H01J23/087—Magnetic focusing arrangements
- H01J23/0876—Magnetic focusing arrangements with arrangements improving the linearity and homogeniety of the axial field, e.g. field straightener
Landscapes
- Microwave Tubes (AREA)
- Surgical Instruments (AREA)
Abstract
852,181. Travelliug wave tubes. MULLARD Ltd. July 16, 1959, No. 24496/59. Class 39(1). The magnetic focusing system of a travelling wave tube comprises two coaxial concentric sets of magnetic rings energised by a common magnet ; the rings straighten the field i.e. make it axial at all points. The inner set of magnetic rings A are of Á metal and have small remnant magnetism, while the outer set B are of mild steel and have a high saturation value. The outer set B may be evenly spaced but are preferably unevenly spaced, as shown, to make the axial field as even as possible, and are disposed between the polepieces P. The inner set A can be incorporated into a subassembly with a travelling wave tube as in Specification 845,000 the outer set B forming a separate subassembly with the magnet. Additional magnetic pole-pieces between the ends of the set B may be used to give the field reversals necessary to set up a periodic focusing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2449659A GB852181A (en) | 1959-07-16 | 1959-07-16 | Magnetic focusing systems for travelling-wave tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2449659A GB852181A (en) | 1959-07-16 | 1959-07-16 | Magnetic focusing systems for travelling-wave tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB852181A true GB852181A (en) | 1960-10-26 |
Family
ID=10212575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2449659A Expired GB852181A (en) | 1959-07-16 | 1959-07-16 | Magnetic focusing systems for travelling-wave tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB852181A (en) |
-
1959
- 1959-07-16 GB GB2449659A patent/GB852181A/en not_active Expired
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