Semi-Automatic Field Mapping Logger

Field Mapping System Diagram

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

1. Verify that all readings are updating
2. Choose the type of file operation (default: open or create)
3. Open or Create a data file
4. Type in the radius and phi angle of current probe position
5. Load the appropriate Z preset file corresponding to current radius
6. Use Previous and Next to choose the starting Z position if needed
7. Move and turn the probes to desired Z position with a very small incline angle (both readings should be in green)
8. Click Record to record current readings
9. 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 φ=90^o
• tube was at R=0 (i.e. along the center of the magnet).

Field_Data_20130501_1139_P90_R12.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) and B_axial(Gauss). And the X,Y,Z direction are defined as

• X: points to the beam left
• Y: points vertically up
• Z: points to the beam dump