GB1371387A – Microwave spectrometer apparatus
– Google Patents
GB1371387A – Microwave spectrometer apparatus
– Google Patents
Microwave spectrometer apparatus
Info
Publication number
GB1371387A
GB1371387A
GB5095071A
GB5095071A
GB1371387A
GB 1371387 A
GB1371387 A
GB 1371387A
GB 5095071 A
GB5095071 A
GB 5095071A
GB 5095071 A
GB5095071 A
GB 5095071A
GB 1371387 A
GB1371387 A
GB 1371387A
Authority
GB
United Kingdom
Prior art keywords
phase
signal
detector
diode
frequency
Prior art date
1970-11-02
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
Application number
GB5095071A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
Priority date (The priority date 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 date listed.)
1970-11-02
Filing date
1971-11-02
Publication date
1974-10-23
1971-11-02
Application filed by Varian Associates Inc
filed
Critical
Varian Associates Inc
1974-10-23
Publication of GB1371387A
publication
Critical
patent/GB1371387A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
G01R33/60—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using electron paramagnetic resonance
Abstract
1371387 Micro-wave resonance spectrometers VARIAN ASSOCIATES 2 Nov 1971 [2 Nov 1970] 50950/71 Heading G1N In an electron spin resonance spectrometer, Fig.1, micro-wave energy from Klystron 2 is coupled via a circulator 3 to a resonance cavity 5 containing the sample under investigation, the signal reflected from the cavity is phasemodulated in a reflection modulator 8 comprising a P.I.N. diode 24 spaced an odd integral number # wavelengths from a reflective wall 25 and is detected at detector 9 which also receives a reference signal via directional couplers 13 and 14 and a variable phase shifter 16. Phase modulator 8 receives pulses from a programmer 27 which also controls gates 28 and 29 to direct an absorption signal (selected for about 10% of the time, when diode 24 is transmissive) to an A.F.C. loop 23, and a dispersion signal (selected for about 90% of the time, when diode 24 is reflective) to a recorder 35 via a phase-sensitive detector 34 synchronized with a field modulation signal from an oscillator 21. In a modification, Fig.5 (not shown), the programmer (27) switches diode (24) at twice the frequency of the field modulation oscillator (21). In another arrangement, Fig.3 (not shown), the phase modulator (8) includes a second P.I.N. diode (38) an odd integral number of “ wavelengths from the reflective wall (25). The diodes (24, 38) and A.F.C. gate (28) are switched under the control of programmer (27) to provide an absorption signal for the A.F.C. loop twice per cycle of an audio frequency oscillator (26). No gate is needed for the record channel as phasesensitive detector (42) which detects a dispersion signal for recording, can reject the second harmonic absorption signal. The recording channel also includes a high audio frequency phasesensitive detector (34) synchronized with the field modulation signal from oscillator (21). In a modification, Fig. 7 (not shown), the magnetic field is modulated at a low audio frequency, 35H z , and diode (38) is switched at a high audio frequency 100kH z , during the record intervals to overcome low frequency detector noise. ENDOR spectrometer, Fig.9 shows an electron nuclear double resonance spectrometer. Nuclear resonance is excited by a frequency swept R.F.O. 62 connected to coil 64 via an amplifier 63 which is pulsed at 6 kH z . The output of detector 9 is gated at 73 to phase detector 75 which detects the absorption signal and passes it to a low frequency phase detector 77 for detection against a 35H z signal supplied to diode 24 in the phase modulator 8. Diode 24 is an odd integral number of “ wavelengths from reflective wall 25. The output of phase detector 77 is recorded on a recorder 35 whose X axis is synchronized with the frequency sweep of the R.F.O. 62. A servoloop 82, 83, 81 automatically adjusts a screw in the iris 7 to maintain matching between the cavity 5 and circulator 3. The A.F.C. loop will properly lock for either phase of the phase modulated reflected cavity signal is the power incident on the cavity 5 is > 4 times the power in reference channel 11; otherwise the A.F.C. must be gated for one of the phases or the reference phase of the A.F.C. phase-sensitive detector (not shown) may be switched by 180 degrees at the 35H z phase modulation frequency.
GB5095071A
1970-11-02
1971-11-02
Microwave spectrometer apparatus
Expired
GB1371387A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US8585170A
1970-11-02
1970-11-02
Publications (1)
Publication Number
Publication Date
GB1371387A
true
GB1371387A
(en)
1974-10-23
Family
ID=22194378
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5095071A
Expired
GB1371387A
(en)
1970-11-02
1971-11-02
Microwave spectrometer apparatus
Country Status (5)
Country
Link
US
(1)
US3714550A
(en)
JP
(1)
JPS5535655B1
(en)
DE
(1)
DE2154511C2
(en)
FR
(1)
FR2112404B1
(en)
GB
(1)
GB1371387A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE10054454B4
(en)
*
2000-09-01
2010-06-17
Council Of Scientific And Industrial Research
System for generating a paramagnetic electron resonance image
Families Citing this family (12)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2271571B1
(en)
*
1974-02-05
1977-03-04
Cameca
JPS57176490A
(en)
*
1981-04-23
1982-10-29
Omron Tateisi Electronics Co
Device for treating coin
JPS60250489A
(en)
*
1984-05-25
1985-12-11
神鋼電機株式会社
Coin distributor
US4703273A
(en)
*
1985-07-29
1987-10-27
The United States Of America As Represented By The United States Department Of Energy
140 GHz pulsed fourier transform microwave spectrometer
US4803624A
(en)
*
1986-09-19
1989-02-07
Pilbrow John R
Electron spin resonance spectrometer
US5233303A
(en)
*
1991-05-23
1993-08-03
Barney Bales
Portable dedicated electron spin resonance spectrometer
JP3281007B2
(en)
*
1991-12-06
2002-05-13
住友特殊金属株式会社
Electron spin resonance device
WO2003010849A1
(en)
*
2001-07-25
2003-02-06
Mcw Research Foundation, Inc.
Cavity for epr spectroscopy having axially uniform field
ES2222791B1
(en)
*
2003-01-15
2006-03-16
Premo, S.A.
METHOD FOR SPECTRAL ANALYSIS AND MICROWAVE POWER MEASUREMENT.
US9491811B2
(en)
*
2009-07-21
2016-11-08
Lg Electronics Inc.
Cooking appliance employing microwaves
US20120241445A1
(en)
*
2009-09-01
2012-09-27
Lg Electronics Inc.
Cooking appliance employing microwaves
CN101835340A
(en)
*
2010-05-20
2010-09-15
江苏海明医疗器械有限公司
Self-adaptive traveling wave phase locking type frequency control system for electronic linear accelerator
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB960927A
(en)
*
1961-12-14
1964-06-17
Hilger & Watts Ltd
Magnetic resonance spectrometer
GB1103622A
(en)
*
1963-11-28
1968-02-21
Hilger & Watts Ltd
Magnetic resonance spectrometer
US3358222A
(en)
*
1964-06-05
1967-12-12
Varian Associates
Gyromagnetic resonance apparatus utilizing pulsed rf excitation
US3350633A
(en)
*
1966-04-18
1967-10-31
Varian Associates
Gyromagnetic spectrometer having separate dispersion and absorption mode detectors
1970
1970-11-02
US
US00085851A
patent/US3714550A/en
not_active
Expired – Lifetime
1971
1971-11-02
JP
JP8751271A
patent/JPS5535655B1/ja
active
Pending
1971-11-02
GB
GB5095071A
patent/GB1371387A/en
not_active
Expired
1971-11-02
FR
FR7139245A
patent/FR2112404B1/fr
not_active
Expired
1971-11-02
DE
DE2154511A
patent/DE2154511C2/en
not_active
Expired
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE10054454B4
(en)
*
2000-09-01
2010-06-17
Council Of Scientific And Industrial Research
System for generating a paramagnetic electron resonance image
Also Published As
Publication number
Publication date
FR2112404A1
(en)
1972-06-16
DE2154511A1
(en)
1972-05-04
US3714550A
(en)
1973-01-30
FR2112404B1
(en)
1975-02-07
DE2154511C2
(en)
1984-03-22
JPS5535655B1
(en)
1980-09-16
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Legal Events
Date
Code
Title
Description
1975-03-05
PS
Patent sealed [section 19, patents act 1949]
1977-03-23
PLE
Entries relating assignments, transmissions, licences in the register of patents
1981-04-01
746
Register noted ‘licences of right’ (sect. 46/1977)
1991-12-04
PE20
Patent expired after termination of 20 years
