scholarly journals Beam dynamics design of a new radio frequency quadrupole for beam-current upgrade of the Japan Proton Accelerator Research Complex linac

2012 ◽  
Vol 15 (8) ◽  
Author(s):  
Yasuhiro Kondo ◽  
Kazuo Hasegawa ◽  
Takatoshi Morishita ◽  
Robert A. Jameson
Keyword(s):  
Radio Frequency ◽  
Beam Current ◽  
Beam Dynamics ◽  
Proton Accelerator ◽  
Radio Frequency Quadrupole ◽  
New Radio ◽  
Research Complex

scholarly journals Beam test of a new radio frequency quadrupole linac for the Japan Proton Accelerator Research Complex

2014 ◽  
Vol 17 (12) ◽  
Author(s):  
Yasuhiro Kondo ◽  
Takatoshi Morishita ◽  
Saisyun Yamazaki ◽  
Toshihiko Hori ◽  
Yuki Sawabe ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Proton Accelerator ◽  
Beam Test ◽  
Radio Frequency Quadrupole ◽  
New Radio ◽  
Research Complex

scholarly journals Beam dynamics and electromagnetic studies of a 3 MeV, 325 MHz radio frequency quadrupole accelerator

2018 ◽  
Vol 4 ◽  
pp. 9 ◽  
Author(s):  
Rahul Gaur ◽  
Vinit Kumar
Keyword(s):  
Radio Frequency ◽  
Tuning Range ◽  
Transverse Cross Section ◽  
Beam Dynamics ◽  
Radio Frequency Quadrupole ◽  
Emittance Growth ◽  
Stabilization Technique ◽  
Field Errors ◽  
Nominal Position ◽  
Vane Tip

We present the beam dynamics and electromagnetic studies of a 3 MeV, 325 MHz H− radio frequency quadrupole (RFQ) accelerator for the proposed Indian Spallation Neutron Source project. We have followed a design approach, where the emittance growth and the losses are minimized by keeping the tune depression ratio larger than 0.5. The transverse cross-section of RFQ is designed at a frequency lower than the operating frequency, so that the tuners have their nominal position inside the RFQ cavity. This has resulted in an improvement of the tuning range, and the efficiency of tuners to correct the field errors in the RFQ. The vane-tip modulations have been modelled in CST-MWS code, and its effect on the field flatness and the resonant frequency has been studied. The deterioration in the field flatness due to vane-tip modulations is reduced to an acceptable level with the help of tuners. Details of the error study and the higher order mode study along with mode stabilization technique are also described in the paper.

scholarly journals Development of the radio frequency quadrupole proton linac for ESS-Bilbao

2020 ◽  
Vol 231 ◽  
pp. 02001
Author(s):  
Juan Luis Muñoz ◽  
Ibon Bustinduy ◽  
Igor Rueda ◽  
David de Cos
Keyword(s):  
Radio Frequency ◽  
Frequency Tuning ◽  
Mechanical Design ◽  
Design Procedure ◽  
Ion Source ◽  
Beam Dynamics ◽  
Radio Frequency Quadrupole ◽  
Electromagnetic Design ◽  
Rf Cavity ◽  
Cavity Design

The Radio Frequency Quadrupole (RFQ) linear accelerator for ESS-Bilbao is described. This device will complete ESS-Bilbao injection chain after the ion source and the LEBT. The design was finished in 2015 and machining of the accelerator cavity started in 2016. The RFQ is a 4-vane structure, aimed to accelerate protons from 45 keV to 3:0MeV and operating at 352:2MHz in pulsed mode with a duty cycle up to 10%. Total length is about 3:1m divided in 4 segments. Each segment is itself assembled from four components, named vanes, by using polymeric vacuum gaskets with no brazing among them. Notable aspects of the design are the constant mean aperture R0, vane radius ρ and thus ρ/R0 ratio and also uniform inter vane voltage. Novel procedures for the design of the modulation and integrated beam dynamics and electromagnetic design have been developed for this task. In this paper, the complete design procedure and its results are presented, including beam dynamics, RF cavity design, field flatness and frequency tuning, cooling and thermo-mechanical design.

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