Consider the Jacobian of the form
|
(463) |
where and are arbitrary integers which can be appropriately chosen by
users, and are constants included for normalization. In the
iterative metric method of solving fixed boundary equilibrium problem, we
first construct a coordinates transformation
(this transformation is arbitrary except
for that surface coincides with the last closed flux surface), then
solve the GS equation in
coordinate system to get the value
of at grid points, and finally adjust the value of
to make surface
lies on a magnetic
surface. It is obvious the Jacobian of the final transformation we obtained
usually does not satisfy the constraint given by Eq. (463) since we do
not use any information of Eq. (463) in the above steps. Now comes the
question: how to make the transformation obtained above satisfy the constraint
Eq. (463) through adjusting the values of ? To make the
constraint Eq. (463) satisfied, and should satisfy the
relation
|
(464) |
which
Using Eq. (), we obtain
|
(465) |
normalized to , the normalized is written as
|
(466) |
yj
2018-03-09