Privacy and Security Notice

nmr NMR SENSORS
The NMR coils for the top and bottom containers are placed outside the cells: both a  proton (1 loop) and deuteron (4 loop) coils are present for each cell.  A Cu/Be coaxial cable connects the coils to a flexible SUCOFORM 86 cable to allow the up and down movement of the stick and the connection to the outside through an hermethic vacuum  feed-through.
Each cable is marked with a different color to distinguish the different coils:
 
COLOR COIL
red proton bottom target
blue proton top target
green deuteron bottom target
yellow deuteron top target

                    NMR Cables






The lenght of the NMR cables located on the target insert is reported below (the values are the result of the mechanical measurement)

 METER
 
Deuteron
Proton
 
 
A
[cm]
B
[cm]
C
[cm]
D
[cm]
E
[cm]
F
[cm]
Stick #1
TOP
 29.8
 44
 
 31.8
44
 
BOTTOM
 34.8
 44
 
 36.5
  44 
 
Stick #2
TOP
 30.4
 44
 
31.5
44
 
BOTTOM
 34.9
  44 
 
36.3
44
  

 

The electrical characteristic of cable and loops have been also checked with a Hewlett-Packard TDR.
The results are shown below.

TDR 
 
Deuteron
Proton
 
 
A
[cm]
B
[cm]
C
[cm]
D
[cm]
E
[cm]
F
[cm]
Stick #1
TOP
30.9
 44.4
 
 32.2
44.4
 
BOTTOM
 35.5
 44.4
 
 36.8
 44.4
 
Stick #2
TOP
 30.5
 44.4
 
32.4
44.4
 
BOTTOM
 35.7
  44 .4
 
37.0
44.4
  

 

As final check each coil has been tuned and the characteristic of the baselines are reported below (RF_level=70mV, deviation frequency 300KHz)

NMR
 
Deuteron (32MHz)
Proton(212.7MHz)
DIODE
PHASE
DIODE
PHASE
 
 
DC level
Parabola Amplitude
 DC level Parabola Amplitude
DC level
Parabola Amplitude
DC level
 Parabola Amplitude
Stick #1
TOP
500 mV
 70 mV
2 V 
40 mV
 700 mV
25 mV
3 V 
25 mV
BOTTOM
500 mV
 60 mV
2 V 
40 mV
 700 mV
 25 mV
3 V 
25 mV
Stick #2
TOP
 750 mV
 120 mV
 2 V
45 mV
900 mV
30 mV
 3.5 V
25 mV
BOTTOM
 750 mV
  120 mV
 2 V
45 mV
800 mV
30 mV
 3.2 V
25 mV