GB1466689A - Epr spectrometer resonant cavity - Google Patents
Epr spectrometer resonant cavityInfo
- Publication number
- GB1466689A GB1466689A GB3193174A GB3193174A GB1466689A GB 1466689 A GB1466689 A GB 1466689A GB 3193174 A GB3193174 A GB 3193174A GB 3193174 A GB3193174 A GB 3193174A GB 1466689 A GB1466689 A GB 1466689A
- Authority
- GB
- United Kingdom
- Prior art keywords
- waveguide
- cavity
- epr spectrometer
- july
- sample
- 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
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/345—Constructional details, e.g. resonators, specially adapted to MR of waveguide type
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
1466689 EPR spectrometer micro-wave cavities VARIAN ASSOCIATES 18 July 1974 [19 July 1973] 31931/74 Heading G1N An EPR spectrometer has a resonant microwave cavity 11, Fig. 1, provided with a relatively large waveguide 31 through which a sample can be placed in the cavity. The waveguide is so dimensioned that its cut-off frequency is lower than the resonant frequency of the cavity; to prevent energy loss the waveguide is positioned so that its fundamental mode cannot be excited by the currents in the cavity, and it is also removably connected to a smaller hollow waveguide 34 whose cut-off is above the resonant frequency. Small samples can be inserted through the waveguide 34, while larger ones necessitate its removal. To irradiate the sample with light, a set of closely spaced apertures 40-44 are provided, this being suitable for use with a parallel sided beam, e.g. from a laser. The cavity shown is cylindrical, but a similar arrangement of waveguides and light inlets can be used with a rectangular cavity, Fig. 6 (not shown). A second waveguide 31 and smaller waveguide 31 may be provided opposite those shown in Fig. 1.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US380647A US3878454A (en) | 1973-07-19 | 1973-07-19 | EPR spectrometer resonant cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1466689A true GB1466689A (en) | 1977-03-09 |
Family
ID=23501971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3193174A Expired GB1466689A (en) | 1973-07-19 | 1974-07-18 | Epr spectrometer resonant cavity |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3878454A (en) |
| JP (1) | JPH0127382B2 (en) |
| CA (1) | CA988585A (en) |
| DE (1) | DE2434674A1 (en) |
| FR (1) | FR2238152B3 (en) |
| GB (1) | GB1466689A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63231251A (en) * | 1987-03-20 | 1988-09-27 | Hitachi Ltd | Electron spin resonance device |
| JP3375089B2 (en) * | 1992-06-09 | 2003-02-10 | 住友特殊金属株式会社 | Thin cavity resonator for electron spin resonance |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3122703A (en) * | 1959-12-21 | 1964-02-25 | Varian Associates | Gyromagnetic resonance method and apparatus |
| US3205432A (en) * | 1962-05-25 | 1965-09-07 | Edward L Cochran | Cavity resonators |
| US3331017A (en) * | 1962-12-13 | 1967-07-11 | Varian Associates | Frequency-compensated access structure for cavity resonator |
| US3609520A (en) * | 1970-02-04 | 1971-09-28 | Varian Associates | Bimodel cavity resonator for microwave spectrometers |
-
1973
- 1973-07-19 US US380647A patent/US3878454A/en not_active Expired - Lifetime
-
1974
- 1974-07-04 FR FR7423363A patent/FR2238152B3/fr not_active Expired
- 1974-07-15 CA CA204,801A patent/CA988585A/en not_active Expired
- 1974-07-18 DE DE2434674A patent/DE2434674A1/en active Granted
- 1974-07-18 GB GB3193174A patent/GB1466689A/en not_active Expired
- 1974-07-19 JP JP49083135A patent/JPH0127382B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3878454A (en) | 1975-04-15 |
| JPS5044888A (en) | 1975-04-22 |
| DE2434674C2 (en) | 1987-03-05 |
| CA988585A (en) | 1976-05-04 |
| JPH0127382B2 (en) | 1989-05-29 |
| DE2434674A1 (en) | 1975-07-03 |
| FR2238152A1 (en) | 1975-02-14 |
| FR2238152B3 (en) | 1976-07-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |