2.2 Site and Parts Requirements

Air requirements:

1. Free of oil and dust (0.01 micron filter);

2. Dew point of at least -30°C;

3. 4m 3 /h flow of air at more than 6 bar for stable, fast spinning;

4. Dry nitrogen gas for low temperature operation either from a pressurized liquid nitrogen tank with a nitrogen boil off device (a 60 liters gas cylinder (200 bar) lasts for approximately 1 hour);

5. B-VT 2000 or 3000 variable temperature unit for all variable temperature (VT) operation and a 25 liters liquid nitrogen dewar for low temperature operation.

MAS equipment

1. MAS pneumatic control unit for sample spinning, display of the spinning rate, as well as sample insert and eject;

2. Set of air hoses and spinning rate cable;

3. Pneumatic sample transfer system for standard bore magnets;

4. MAS sample changer for automatic multiple sample insert and eject (optional).

RF amplifiers

HR-MAS probes are designed to operate with the standard RF transmitters. No high-power transmitters are needed!

B0 gradient option

For HR-MAS probes equipped with a magic angle gradient in addition to the above mentioned items, a gradient amplifier is needed. Gradient amplifiers capable  of preemphasis and 10 A output current are recommended, such as the GRE-AT  TM or ACCUSTAR TM .