Title :
Transport properties of a discrete helical electrostatic quadrupole
Author :
Meitzler, C.R. ; Antes, K. ; Datte, P. ; Huson, F.R. ; Xiu, L.
Author_Institution :
Texas Accel. Center, The Woodlands, TX, USA
Abstract :
The helical electrostatic quadrupole (HESQ) lens has been proposed as a low energy beam transport system which permits intense H/sup -/ beams to be focused into a radio frequency quadrupole (RFQ) without seriously increasing the beam´s emittance. A stepwise continuous HESQ lens has been constructed, and preliminary tests have shown that the structure does provide focusing. In order to understand the transport properties of this device, further detailed studies have been performed. Emittances were measured 3.5 cm from the end of the HESQ at two different voltages on the HESQ electrodes. A comparison of these experimental results with a linear model of the HESQ beam transport is made.<>
Keywords :
beam handling equipment; beam handling techniques; electrostatic accelerators; transport processes; HESQ beam transport; discrete helical electrostatic quadrupole; emittance; focusing; intense H/sup -/ beams; linear model; low energy beam transport system; radio frequency quadrupole; stepwise continuous HESQ lens; Electrodes; Electrostatic measurements; Ground support; Insulation; Ion sources; Lenses; Particle beams; Structural beams; Testing; Voltage;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164835
