This hbook file is the field map data of the COBRA magnet.
The magnet model used in the calculation is axi-symmetric with respect to
the z-axis (beam axis) and plane-symmetric with respect to the z=0 plane.
The beam transport solenoid is not taken into account at present.
The hbook file contains four two-dimensional histograms (ID=100, 101, 200,
201).
Histogram 100 and 200 (101 and 201) is the strength of the z(r)-component
of the field in Tesla at the point (R,Z).
Data mesh of histogram 200 and 201 is finer than that of histogram 100 and
101 and useful for precise study of the positron tracking around the central
region.
The parameters of the histograms are described in the following table.
Histogram ID
|
100
|
101
|
200
|
201
|
Data[Tesla]
|
Bz
|
Br
|
Bz
|
Br
|
NR
|
121
|
121
|
601
|
601
|
RMI[m]
|
-0.0025
|
-0.0025
|
-0.0005
|
-0.0005
|
RMA[m]
|
0.6025
|
0.6025
|
0.6005
|
0.6005
|
NZ
|
301
|
301
|
501
|
501
|
ZMI[m]
|
0.4975
|
0.4975
|
-0.0005
|
-0.0005
|
ZMA[m]
|
2.0025
|
2.0025
|
0.5005
|
0.5005
|
NR: number of channels in R
RMI: lower edge of first R channel
RMA: upper edge of last R channel
NZ: number of channels in Z
ZMI: lower edge of first Z channel
ZMA: upper edge of last Z channel
This document was created by W. Ootani.
(Last update: 7-Jan-2003)