Test of the transport properties of a helical electrostatic quadrupole and quasi-octupole

Author

Xiu, L. ; Ohnuma, S. ; Wang, K. ; Meitzler, C.R. ; Xu, Y.

Author_Institution

Dept. of Phys., Houston Univ., TX, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

3148

Abstract

A third-generation continuous helical electrostatic quadrupole (HESQ) lens has been built and tested. The new HESQ is 21.5 cm long and has a 3.6 cm diameter aperture. The HESQ has been tested under two separate conditions: with a pulsed 25 keV, 0.5 mA proton beam; and a 25 keV, 10 mA proton beam. The input emittance was fixed using a multi-aperture collimator. A comparison is made between experiment and numerical simulations for a wide variety of operating conditions. A second possible operating mode is the quasi-octupole mode which offers significantly reduced aberration when compared to the quadrupole mode. The results of preliminary tests in this operating mode will be presented

Keywords

beam handling equipment; beam handling techniques; electrostatic lenses; 21.5 cm; 25 keV; 3.6 cm; emittance; helical electrostatic octupole lens; helical electrostatic quadrupole lens; numerical simulation; proton beam; transport properties; Collimators; Current measurement; Electrostatics; Flanges; Ion beams; Lenses; Numerical simulation; Particle beams; Testing; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.309582

Filename

309582