View source for Semi-Automatic Field Mapping Logger

== Field Mapping System Diagram ==
[[File:Field_Mapping.png]]

== Running the Field Logger Software ==
1. Use remote desktop to log onto halld2 using account 'JLAB\halldusers', ask Elliott for password
 rdesktop halld2 -g 1800x1000
2. Double click the shortcut '''Field_Logger''' on the desktop to run the LabVIEW application
# Verify that all readings are updating. If some readings are missing, exit the LabVIEW program and reboot related hardware (see system diagram)
# Choose the type of file operation (default: open or create)
# Open or Create a data file
# Type in the radius and phi angle of current probe position
# Load the appropriate Z preset file corresponding to current radius
# Use '''Previous''' and '''Next''' to choose the starting Z position if needed
# Move and turn the probes to desired Z position with a very small incline angle (both readings should be in green)
# Click '''Record''' to record current readings
# Continue to next point

==Files ==
The files are stored on the ''halld-online'' group disk here:

 /group/halld-online/Solenoid_Mapping

Which should also be accessible from the "M:" drive

 M:\halld-online\Solenoid_Mapping

The file names are formatted to contain the date, start time, phi value, and radius. For example, the following file was:
* created on May 1st, 2013 at 11:39am
* the strut was positioned such that the tube positions were along &phi;=90<sup>o</sup>
* tube was at R=0 (i.e. along the center of the magnet).

 Field_Data_20130501_1139_P90_R12_Test.dat

The columns of a data file are: radius(inch), phi(deg), Z(cm), Incline(deg), B_x(Gauss), B_y(Gauss), B_z(Gauss), B_axial(Gauss) and Current (A).
And the X,Y,Z directions are defined as
* X: points to the beam left
* Y: points vertically up
* Z: points to the beam dump