Difference between revisions of "Plan for mapping PS magnet"

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* Start from mapping the field along the beamline at (X,Y) = (0,0) at B = 1.8 T. We'll compare the field map with TOSCA.
 
* Start from mapping the field along the beamline at (X,Y) = (0,0) at B = 1.8 T. We'll compare the field map with TOSCA.
  
* Can we rotate 2 hole probes to measure Bz and Bx ?
+
* Can we rotate 2 Hall probes to measure Bz and Bx ?

Revision as of 11:04, 26 February 2014

TOSCA simulation provided by S. Glamazdin. Field profile along the Z axis. Z = 0 cm is at the center of the magnet.

18d36 field.png

Saturation

18d36 satur.png


Mapping Requirements

Coordinate system

  • The origin (0,0,0) is the geometric center of the magnetic poles, located in the middle of the gap.
  • Z axis is along the beam and points along the photon beam direction
  • Y is vertical
  • X is perpendicular to the beam points to the Hall D south wall


Mapping Regions

Downstream end of the magnet

  • 0 cm < Z < 90 cm

(1st measure fringe field for the maximum Z range allowed by the mapper)

  • -22 cm < X < 22 cm
  • Z = -1 cm, 0 cm, 1 cm, (3 cm)


Upstream end of the magnet

  • -90 cm < Z < 0 cm
  • -5 cm < X < 5 cm
  • Y = -1 cm, 0 cm, 1 cm, (3 cm)

Step size

  • 1 cm in X and Z


Mapping Fields

  • 1.8 T
  • 1.9 T
  • 1.5 T
  • ( 1 T)


Mapping procedure

  • Start from mapping the field along the beamline at (X,Y) = (0,0) at B = 1.8 T. We'll compare the field map with TOSCA.
  • Can we rotate 2 Hall probes to measure Bz and Bx ?