Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simultaneous beam based alignment measurement for multiple magnets   We propose a method to simultaneously determine the magnetic centers of
multiple quadrupoles in a transport line or a storage ring. The method finds
the magnet centers by correcting the orbit shift due to a change of the
quadrupole gradient strengths with orbit correctors. The quadrupoles are
selected with orbit corrector magnets and beam position monitors in between to
ensure that orbit correction at the quadrupole locations can be achieved. The
correction of the induced orbit shift is done by steering the orbit toward the
quadrupole centers with correctors, using its response matrix with respect to
the correctors. The response matrix can be measured or calculated. Simulations
with a section of the Linac Coherent Light Source (LCLS) II and the SPEAR3
storage ring are done to demonstrate the feasibility and performance of the
method. It is also experimentally tested on SPEAR3. The method can be extended
for beam based alignment measurement of nonlinear magnets.

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The categories of this paper are: math
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex