Model SMM 770 Scanning Magnetic Microscope System
TRISTAN TECHNOLOGIES --Page
69
Default type of the excitation signal. Either "SineWave", "TriangleWave", "SquareWave", or
"SawtoothWave".
Coil_Diameter_(m)=0.1
Diameter of the excitation coil.
Coil_Turns_(N)=1
Turns of the excitation coil.
Coil_Resistor_(ohms)=66800
Resistance in series with the excitation coil.
Active=FALSE
Default enabling/disabling of excitation signal. Either "TRUE" or "FALSE".
Enabled=FALSE
Specifies whether or not the excitation hardware exists. Either "TRUE" or "FALSE".
[DAQ]
AI_Port=Dev1/ai0
Specifies port(s) to be used for all analog input(s), such as SQUID, excitation sensing, and
misc. sensing. The available ports are listed under NI-MAX. For example, ten ports would
be specified as "Dev1/ai0:9"
NumChans=1
Specifies the number of channels specified under "AI_Port". For example, if
AI_Port=Dev1/ai0:9, then NumChans=10.
NumSQUIDs=1
Specifies the number of SQUID channels. This number must be <= NumChans. For multi-
channel systems, SQUIDs are always the first channels, followed by other channels such as
excitation sensing.
Xcoords_(mm)=0
X coordinate frame of the SQUID array. For example, a set of nine SQUIDs could be "-
3,0,3,-3,0,3,-3,0,3".
Ycoords_(mm)=0
X coordinate frame of the SQUID array. For example, a set of nine SQUIDs could be
"2,3,4,-1,0,1,-4,-3,-2".
Coil_Calibration_(T/V)=2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5,
2.45e-5
Calibration of the SQUID array for gains of x1 thru x500. Calibrations for differet gains are
delimited by commas, and sets for each channel are delimited by semicolons. For example, a set of
nine SQUIDs could have
“2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5, 2.45e-5;
