EP 0438738 B1 19940713 - Quasi optical component for microwave radiation.
Title (en)
Quasi optical component for microwave radiation.
Title (de)
Quasi-optische Komponente für Mikrowellenstrahlung.
Title (fr)
Composante quasi-optique pour rayonnement à micro-ondes.
Publication
Application
Priority
- CH 11490 A 19900115
- CH 181990 A 19900529
Abstract (en)
[origin: JPH04332433A] PURPOSE: To guide an electron beam of high quality in a gyrotron by arranging a cooled absorber in the proximity of the front of a quasi-optical element, and by absorbing at least one of strong secondary peaks caused by diffraction. CONSTITUTION: A quasi-optical structure includes a quasi-optical mirror 18a as a quasi-optical element, and a hollow cylindrical vessel 17 as an absorber. An incident microwave travels in a prescribed incidence direction, and is reflected from the mirror 18a in the direction of a principal axis 19. The mirror 18a has a diameter D smaller than 50 times the wavelength of microwave, and a cross-sectional size of the mirror 18a is relatively made smaller. Thus, the microwave is entirely diffraced in a mirror 16a. The absorbing vessel 17 is carried as close to the mirror 18a as possible so that a secondary peak 20 is absorbed. Moreover, the cooled absorbing vessel 17 is provided to absorb at least one of maximum peaks of the strong secondary peak 20 caused by the cross-sectional size diffraction. Therefore, an electron beam of high quality can be guided within a gyrotron.
IPC 1-7
IPC 8 full level
H01J 25/00 (2006.01); H01J 23/30 (2006.01); H01J 25/02 (2006.01); H01P 3/20 (2006.01)
CPC (source: EP US)
H01J 23/30 (2013.01 - EP US); H01J 25/025 (2013.01 - EP US); H01P 3/20 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB LI NL
DOCDB simple family (publication)
EP 0438738 A1 19910731; EP 0438738 B1 19940713; DE 59006432 D1 19940818; JP H04332433 A 19921119; US 5187408 A 19930216
DOCDB simple family (application)
EP 90124755 A 19901219; DE 59006432 T 19901219; JP 279391 A 19910114; US 63673191 A 19910102