Matching of odd number of focusing elements

[jamesclarke22]

Dear All,

The '''Matching``` function in Ocelot is very convenient to optimize the FODO configuration as given in the tutorial N7.

This tutorial is working fine as long as there are even number of focusing elements (QF, QD).

However, I am trying to optimize a triplet.

Is it possible to apply such a matching in the case of Triplet ?

Thank you.
James

[sergey-tomin]

Hi,

Yes, of course. You can use as many quadrupoles or other variables as you like.

However, please note that there is a limitation imposed by the optimization methods. For some methods, using more than 8–10 variables can significantly slow down the process of finding the minimum. It is also depends on the optimization problem you want to solve.

Sergey.

[jamesclarke22]

Dear Prof. Sergey (@sergey-tomin ),

Thank you for your reply. I am still working on this problem.

My aim is to get the beam transverse size half of its initial value. If before triplet beam size = 2*sigma_x then after triplet beam size= sigma_x (at a distance d from the triplet exit).

I would like to try more, and if eventually I fail, I may write again for your advice.

Thank you.
James