CryoMAS-DNP

The probe for solids NMR when you need a factor of 2,000,000

A decade in the development, by the world’s best Solids-NMR-Probes Team

 

CryoMas DNP
30 K to 400 K MAS


90-K MAS with open-loop LN2


30-K MAS with closed-loop helium


H/X/Y tuning


Efficient microwave irradiation


Ultra-low background signals


3 mm rotor, 18 kHz cold spinning


Automatic sample eject


High rf field strengths


Long runs at any temperature


Compatible with standard RT shims in WB magnets up to 750 MHz


Microwaves fed from bottom of probe

 

H/C/N Mas Probe Comparisons
Competitor’s Conventional MAS Probe
MIT’s MAS-DNP
Doty CryoMAS
at 260 K
Doty 30-K
CryoMAS DNP
Sample temp., K
260
100
260
30
Effect. samp. vol., μL
20
15
30
15
Noise temp. (probe + preamp), K
350
300
120
60
Tuned RF cir. effic., %
22
11
40
35
Relative gains in throughput – (S/N)2 – assuming above
Boltzman factor
1
6.76
1
75.1
Sample volume
1
0.56
2.25
0.56
Noise temperature
1
1.17
2.92
5.83
Circuit RF efficiency
1
0.50
1.82
1.59
Spectral resolution
1
0.2
1
0.2
Q * filling factor
1
1
1.5
1.5
DNP
1
20,000
1
20,000
Total throughput gain without DNP
1
0.444
17.9
117.6
Total throughput gainwith DNP
8873
2,352,557
Acknowledgment: Research reported in this poster was supported by NIGMS of the National Institutes of Health under award numbers R43GM108147.  The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH.

 

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