Proton and Ion Accelerators and Applications
Industrial and medical accelerators
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MOPO077 Design of the High Gradient Negative Harmonic Structure for Compact Ion Therapy Linac 160
MOOP11   use link to see paper's listing under its alternate paper code  
 
  • S.V. Kutsaev, R.B. Agustsson, A.Yu. Smirnov, A. Verma
    RadiaBeam, Santa Monica, California, USA
  • A. Barcikowski, R.L. Fischer, B. Mustapha
    ANL, Argonne, Illinois, USA
 
  Funding: This work was supported by the U.S. Department of Energy, Office of High Energy Physics, under SBIR grant DE-SC0015717 and Accelerator Stewardship Grant, Proposal No. 0000219678
A novel concept for an Advanced Compact Carbon Ion Linac (ACCIL) that will deliver up to 1 pnA of carbon ions with variable energy from 45 MeV/u to 450 MeV/u in a 45 m footprint, has been developed by Argonne National Laboratory (ANL) in collaboration with RadiaBeam. The ACCIL will have a 35 MV/m real-estate accelerating gradients that became possible to achieve with the development of novel S-band high-gradient structures, capable of providing 50 MV/m accelerating gradients for particles with β>0.3. In particular, a β=0.3 structure based on the novel approach of operation at the first negative spatial harmonic with the increased distance between the accelerating gaps will be presented. This is the first attempt to reach such high gradients at such small velocities. RadiaBeam and ANL have demonstrated the feasibility of building this structure for accelerating carbon ions by means of advanced computer simulations and are currently working towards the fabrication of this structure for high power tests.
 
slides icon Slides MOPO077 [1.863 MB]  
poster icon Poster MOPO077 [0.923 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO077  
About • paper received ※ 11 September 2018      issue date ※ 18 January 2019  
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MOPO079 Cavity Design of a 7 MeV 325 MHz Proton APF IH-DTL for a Compact Injector 163
 
  • X. Li
    University of Chinese Academy of Sciences, Beijing, People’s Republic of China
  • X. Li, Y.H. Pu, X.C. Xie, M.H. Zhao
    SINAP, Shanghai, People’s Republic of China
  • F. Yang
    Shanghai APACTRON Particle Equipment Company Limited, Shanghai, People’s Republic of China
 
  Funding: National Key Research and Development Program of China (grant number 2016YFC0105408)
An Interdigit H-mode Drift-Tube-Linac (IH-DTL) with Alternating-Phase-Focusing (APF) method working at 325MHz was designed. With the RF field established properly in the cavity, protons can be accelerated from 3MeV to 7MeV successfully. In this paper, the process of designing such an APF IH-DTL cavity is going to be presented. Also, the characteristics of the cavity and pa-rameters studying of RF are going to be demonstrated.
 
poster icon Poster MOPO079 [0.433 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO079  
About • paper received ※ 02 September 2018      issue date ※ 18 January 2019  
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MOPO080 The Manufacturing of the CSNS DTL Tank 167
 
  • X.L. Wu, T. Luo
    CSNS, Guangdong Province, People’s Republic of China
  • L. Dong, K.Y. Gong, H.C. Liu, H. Song
    IHEP, Beijing, People’s Republic of China
  • S.M. Liu
    DNSC, Dongguan, People’s Republic of China
 
  The DTL tank is a crucial component of the China Spallation Neutron Source (CSNS) linear accelerator (LINAC), which mainly use the technology of oxygen-free copper (OFC) electroplating on the inner surface of the 20# carbon steel tube. It is the first time to perform OFC electroplating with high electrical conductivity in the high intensity beam accelerator in China. In the process of cavity manufacturing, problems such as machining deformation, plating surface nodule and plating peeling are encountered. In this project, based on pre-research and information from literature, the formula of acid solution was improved to construct a stable pickling process protocol. The manufacturing process of DTL tank and the measurement details are introduced in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO080  
About • paper received ※ 10 September 2018      issue date ※ 18 January 2019  
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MOPO081 Light Proton Therapy Linac LLRF System Development 171
 
  • B.B. Baricevic, A. Bardorfer, R. Cerne
    I-Tech, Solkan, Slovenia
  • G. De Michele, Ye. Ivanisenko
    AVO-ADAM, Meyrin, Switzerland
 
  Proton cancer therapy is a state-of-the-art medical treatment technique based on an accelerator beam production facility. The LIGHT linear accelerator design by AVO-ADAM offers a modular compact solution for precise control of the treatment dose delivery, both position and energy wise. Proton energy can be modulated at up to 200 Hz in a range from 70 to 230 MeV by varying the gradient of the accelerating structures. The normal conducting LINAC RF system is based on a 750 MHz RFQ and 12 S band stations individually controlled. A customized LLRF system is being developed on the Libera LLRF platform for the LIGHT project. The paper is describing the required cavity field control functionality and the other subsystems such as master oscillator reference, cavity tuning, real-time control, data acquisition, control system and synchronization interfaces.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO081  
About • paper received ※ 11 September 2018      issue date ※ 18 January 2019  
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MOPO082 Commissioning Status of the Linac for the iBNCT Project 174
 
  • M. Sato, Z. Fang, M.K. Fukuda, Y. Fukui, K. Futatsukawa, Y. Honda, K. Ikegami, H. Kobayashi, C. Kubota, T. Kurihara, T. Miura, T. Miyajima, F. Naito, K. Nanmo, T. Obina, T. Shibata, T. Sugimura, A. Takagi, E. Takasaki
    KEK, Ibaraki, Japan
  • K. Hasegawa
    JAEA, Ibaraki-ken, Japan
  • H. Kumada, Y. Matsumoto, Su. Tanaka
    Tsukuba University, Graduate School of Comprehensive Human Sciences, Ibaraki, Japan
  • N. Nagura, T. Ohba
    Nippon Advanced Technology Co., Ltd., Tokai, Japan
  • T. Onishi
    Tsukuba University, Ibaraki, Japan
  • T. Ouchi, H. Sakurayama
    ATOX, Ibaraki, Japan
 
  Boron neutron capture therapy (BNCT) is one of the particle-beam therapies which use secondary products from a neutron capture on boron medicaments implanted into cancer cells. This has been originally studied with neutrons from nuclear reactors, meanwhile, many activities have been recently projected with accelerator-based neutron generation. In the iBNCT (Ibaraki BNCT) project, the accelerator is consisted with a radio frequency quadrupole (RFQ) and an Alvarez type drift-tube linac (DTL). Protons extracted from an ion source are accelerated up to 3 MeV and 8 MeV, respectively, and bombarded onto a beryllium target to generate neutrons. The design of the linac is based on the J-PARC one, but the most significant difference is the higher duty factor to have a sufficient epithermal neutron flux for BNCT. We have started the commissioning from the end of 2016, and the beam current of 1.3 mA with a repetition of 50 Hz has been achieved with an acceptable stability. Further beam commissioning and reinforcement of the vacuum and cooling water system will be performed toward higher beam current. In this contribution, the current status and future prospects of the linac will be presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO082  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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MOPO132 The 7 MeV APF DTL for Proton Therapy 277
MOOP02   use link to see paper's listing under its alternate paper code  
 
  • X.C. Xie, D.M. Li, X. Li, Y.H. Pu, J. Qiao, M.H. Zhao, Z.T. Zhao
    SINAP, Shanghai, People’s Republic of China
  • Y.H. Pu, X.C. Xie, F. Yang
    Shanghai APACTRON Particle Equipment Company Limited, Shanghai, People’s Republic of China
 
  Funding: This work is fund by Ministry of Science and Technology of the People’s Repulic of China, under Grant Number 2016YFC0105408
A 7MeV alternating phase focused (APF) drift tube linear (DTL) for proton therapy has been designed, and a design code has been developed based on a sinusoidal synchronous phase formula and a linearly increasing electrode voltage assumption. The design procedure includes the radio frequency quadrupole (RFQ) to drift tube linac (DTL) matching, and end-to-end simulation that conducted by Trace Win. Moreover, a cutting method has been performed to correct the integral electric field deviation of RF gaps.
 
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO132  
About • paper received ※ 20 August 2018      issue date ※ 18 January 2019  
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TH1A02
From Laser Acceleration to Laser Proton Accelerator  
 
  • X.Q. Yan
    PKU, Beijing, People’s Republic of China
 
  Funding: MOST
A Compact LAser Plasma Accelerator (CLAPA) that can stably produce and transport protons with different energies less than 10 MeV, less than 1% energy spread and several to tens of pC charge is demonstrated. The high current proton beam with continuous energy spectrum and a large divergence angle was generated by using a high contrast laser interacting with micron thickness targets, which later was collected, analyzed and refocused by an electromagnetic lattice using combination of quadrupole and bending electromagnets. This is the first experiment that combines the laser acceleration with a fully functional beam line, realizing the precise manipulation of the proton beams with reliability, availability, maintainability and inspectability . Spread-out Bragg peak (SOBP), the key technology of proton radiotherapy for malignant tumors, is then realized with laser accelerator for the first time.
 
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