< Leiden Dilution Fridge | Index | Experiments for students >
Cu plus KCuF{$_{\mathbf{3}}$}
- Coil length ~10 mm, radius ~2.5 mm, wire thickness ~0.4 mm
- 2-150MHz NQReSpect,
- ? Pulse amplifier 60 dB?, gtknmr Txatt ? dB, {$\pi$} duration ? {$\mu$}s,
|
|
VOTTP
- Coil length ~10 mm, radius ~2.5 mm, wire thickness ~0.4 mm
- {$v_{\mathrm{coil}}=200\, \mathrm{mm}^3$}, {$v_{\mathrm{sample}}=3\,10^{-2}\, \mathrm{mm}^3$}, (see pic) filling factor {$ v_{\mathrm{sample}}/v_{\mathrm{sample}} = 10^{-5}$}
- 2-150MHz NQReSpect,
- ? Pulse amplifier 60 dB?, gtknmr Txatt 48 dB (just above diode bridge, i.e. {$V_{\mathrm{pulse}}\approx 1$} V on {$R= 50$} Ohm, {$\Delta t_\pi$}= 1.4 {$\mu$}s,
- NMR power for the 14 pulse CPMG sequence repeated 16 times at T=70 mK is {$224\Delta t_\pi V_{\mathrm{pulse}}^2/R \approx 6 \mu$}J
|
Sample on plastic holder in coil
|
Next
Index
< Leiden Dilution Fridge | Index | Experiments for students >
