Uniform beam intensity redistribution in the LENS nonlinear transport line

Author

Bogdanov, A. ; Anferov, V. ; Ball, M. ; Baxter, D.V. ; Derenchuk, V.P. ; Klyachko, A.V. ; Rinckel, T. ; Solberg, K.

Author_Institution

IUCF, Bloomington

fYear

2007

fDate

25-29 June 2007

Firstpage

1748

Lastpage

1750

Abstract

The Low Energy Neutron Source (LENS) at Indiana University is producing neutrons by using a 7 MeV proton beam incident on a Beryllium target. The Proton Delivery System is currently being upgraded [1], [2]. A new AccSys Technology,Inc. DTL section [3] will be added to increase proton beam energy from 7 to 13 MeV. A 3 MeV RFQ and 10 MeV DTL will be powered by two 1.25 MW klystrons. The goal of this upgrade is a 13 MeV,25 mA proton beam with duty factor greater than 3%. At this power level it becomes increasingly important to make a proton beam that is uniformly distributed to prevent excessive thermal stress at the surface of the Be- target. To achieve this goal two octupole magnets are being implemented in each LENS beam transport line. In this paper we discuss the experimental results of the beam intensity redistribution as well as some features inherent in tuning of the nonlinear beamline and our operational experience.

Keywords

beam handling techniques; beryllium; klystrons; linear accelerators; neutron sources; proton accelerators; proton beams; thermal stresses; Be; Indiana University; LENS nonlinear transport line; Low Energy Neutron Source; RFQ; beam intensity redistribution; beryllium target; electron volt energy 7 MeV to 13 MeV; klystrons; nonlinear beamline tuning; octupole magnets; proton beam energy; thermal stress; Assembly; Klystrons; Lenses; Linear particle accelerator; Magnets; Materials science and technology; Neutrons; Particle beams; Protons; Thermal stresses;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4440885

Filename

4440885