Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved bunching and longitudinal emittance control in an RFQ   A new approach to the longitudinal vane modulation profile in a Radio
Frequency Quadrupole (RFQ) has been discovered that significantly improves
bunching and longitudinal emittance control. This procedure has been
successfully tested in different RFQ models with satisfactory reduction of the
longitudinal emittance; thus, this advanced method can be implemented for any
RFQ. Highlights:
  Advanced longitudinal vane modulation profile that improves bunching and
longitudinal emittance control.
  Vane manipulation to avoid the nonlinear effects of the accelerating field
inside the cell.
  Analysis in the full time-domain. Keywords: Radiofrequency Quadrupoles,
Equipartitioning, Beam bunching.

21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex