LADP-2 Experimental System of Pulsed NMR Featured Image

LADP-2 Kev Tshawb Fawb Txog Pulsed NMR

Kev Piav Qhia Luv:

Pulsed Fourier hloov pauv nuclear magnetic resonance siv pulsed RF teb los ua rau lub cev nuclear los saib xyuas cov lus teb ntawm lub cev nuclear rau lub pulse, thiab siv cov thev naus laus zis Fourier hloov pauv sai (FFT) los hloov lub sijhawm sau lub teeb liab mus rau hauv lub teeb liab zaus, uas yog sib npaug rau ntau zaus ib qho nthwv dej txuas ntxiv nuclear magnetic resonance spectrometers tau zoo siab tib lub sijhawm, yog li qhov xwm txheej nuclear magnetic resonance tuaj yeem pom hauv ntau qhov loj, thiab lub teeb liab ruaj khov Tam sim no, txoj kev pulse siv rau hauv feem ntau NMR spectrometers, thaum txoj kev pulse siv rau hauv MRI.

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Cov Khoom Qhia Txog Khoom

Cov Cim Npe Khoom

Kev sim

1. Nkag siab txog lub tswv yim yooj yim ntawm lub cev thiab kev teeb tsa sim ntawm lub cev PNMR. Kawm piav qhia txog cov xwm txheej ntawm lub cev hauv PNMR siv cov qauv vector qub.

2. Kawm siv cov teeb liab ntawm spin echo (SE) thiab free induction decay (FID) los ntsuas T₂(lub sijhawm so ntawm lub zog tig-spin). Tshuaj xyuas qhov cuam tshuam ntawm qhov sib npaug ntawm lub zog sib nqus ntawm lub teeb liab NMR.

3. Kawm ntsuas T₁(lub sijhawm so ntawm lub lattice) siv kev rov qab los.

4. Nkag siab txog qhov zoo ntawm txoj kev so, saib cov nyhuv ntawm cov paramagnetic ions rau lub sijhawm so nuclear.

5. Ntsuas T₂ntawm cov kua tooj liab sulfate ntawm ntau qhov sib txawv. Txheeb xyuas qhov kev sib raug zoo ntawm T₂nrog rau kev hloov pauv ntawm concentration.

6. Ntsuas qhov kev hloov pauv tshuaj ntawm cov qauv.

Cov Lus Qhia Tshwj Xeeb

Kev piav qhia	Cov Lus Qhia Tshwj Xeeb
Lub zog muab hluav taws xob ntawm thaj chaw hloov kho	Tam sim no siab tshaj plaws 0.5 A, kev tswj hwm hluav taws xob 0 - 6.00 V
Lub zog muab hluav taws xob ntawm homogenous teb	Tam sim no siab tshaj plaws 0.5 A, kev tswj hwm hluav taws xob 0 - 6.00 V
zaus oscillator	20 MHz
Lub zog ntawm lub zog sib nqus	0.470 T
Txoj kab uas hla ntawm lub zog sib nqus	100 hli
Qhov deb ntawm tus ncej sib nqus	20 hli
Kev sib npaug ntawm lub zog sib nqus	20 ppm (10 hli × 10 hli × 10 hli)
Kub tswj tau	36.500 °C
Kev ruaj khov ntawm lub zog sib nqus	4 teev sov kom ruaj khov, Larmor zaus drift tsawg dua 5 Hz ib feeb.

Daim Ntawv Teev Khoom

Kev piav qhia	Qhov ntau	Lus Cim
Chav Kub Tsis Tu Ncua	1	suav nrog lub hlau nplaum thiab lub cuab yeej tswj kub
Chav Xa Xov Tooj Cua RF	1	suav nrog lub zog muab hluav taws xob ntawm thaj chaw hloov kho
Chav Txais Teeb Liab	1	suav nrog lub zog fais fab ntawm homogenous teb thiab qhov kub thiab txias
Txoj hlua fais fab	1
Ntau yam Cable	12
Cov raj xa qauv	10
Phau Ntawv Qhia	1