Refine your search:     
Report No.
 - 
Search Results: Records 1-8 displayed on this page of 8
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Baseline design of a proton linac for BNCT at OIST

Kondo, Yasuhiro; Hasegawa, Kazuo; Higashi, Yasuo*; Sugawara, Hirotaka*; Yoshioka, Masakazu*; Kumada, Hiroaki*; Matsumoto, Hiroshi*; Naito, Fujio*; Kurokawa, Shinichi*

Proceedings of 7th International Particle Accelerator Conference (IPAC '16) (Internet), p.906 - 909, 2016/06

An accelerator based boron neutron capture therapy (BNCT) facility is being planned at Okinawa institute of science and technology (OIST). The proton accelerator consists of a radio frequency quadrupole (RFQ) linac and a drift tube linac (DTL). The required beam power is 60 kW. The present beam energy and current are 10 MeV and 30 mA, respectively. The pulse length is 3.3 ms and the repetition rate is 60 Hz, therefore, the duty factor is 20%. In this paper, present design of this compact, medium current, high duty proton linac is presented.

Journal Articles

Development of a proton accelerator for OIST BNCT

Kondo, Yasuhiro; Hasegawa, Kazuo; Higashi, Yasuo*; Kumada, Hiroaki*; Kurokawa, Shinichi*; Matsumoto, Hiroshi*; Naito, Fujio*; Yoshioka, Masakazu*

Proceedings of 12th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.948 - 950, 2015/09

An accelerator based boron neutron capture therapy (BNCT) facility is being planned at Okinawa institute of science and technology (OIST). The proton accelerator consists of a radio frequency quadrupole (RFQ) linac and a drift tube linac (DTL). The reqired beam power is 60 kW. The present beam energy and current are 10 MeV and 30 mA, respectively. The pulse length is 3.3 ms and the repetition rate is 60 Hz, therefore, the duty factor is 20%. In this paper, present designof this compact, midium current, high duty proton linac is presented.

Journal Articles

Elongation of plasma channel for electron acceleration

Chen, L.-M.; Nakajima, Kazuhisa; Hong, W.*; Hua, J. F.*; Kameshima, Takashi; Kotaki, Hideyuki; Sugiyama, Kiyohiro*; Wen, X.*; Wu, Y.*; Tang, C.*; et al.

Chinese Optics Letters, 5(S1), p.S133 - S135, 2007/05

Oral presentation

Plasma density profile measurement of discharged capillary for laser electron acceleration

Kameshima, Takashi; Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Kawase, Keigo; Fukuda, Yuji; Chen, L. M.; Faenov, A. Y.; Pikuz, T. A.*; Homma, Takayuki; et al.

no journal, , 

In recent years, It is noted to use of discharge capillary for laser plasma electron acceleration in order to solve the limit owing to laser focal distance. As the higher plasma density is, the lower the refraction index is, laser propagetes into and interacts plasma, keeping its focal size because discharge plasma behaves like optical fiber. This tequnique would make acceleration space much longer, compared to conventional method with several mm length. This time, we measured plasma density profile inside capillary in order to research optimum distribution of the refraction index, which is very important for R&D of capillary. Here, we will talk about the experimental result.

Oral presentation

Ablative capillary discharge for laser plasma electron acceleration

Kameshima, Takashi; Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Kawase, Keigo; Fukuda, Yuji; Chen, L. M.; Homma, Takayuki; Kondo, Shuji; Bulanov, S. V.; et al.

no journal, , 

Recently, it is noticed to generate plasma by using capillary discharge in order to solve a limit due to focal distance of laser, which is one of problems in laser plasma electron acceleration. Since the higher its plasma density, the lower plasma refraction index is, a laser propagates in plasma with its focal size kept and interacts plasma in same principle of optical fiber by distributing plasma as its outside is more dense than its inside. In 2006, KEK, JAEA, and Chinese Academy Engineering Physics(CAEP) carried out a collaboration experiment, where we succeed in generating 560MeV electron beam by using discharge capillary. The result will be informed.

Oral presentation

Ablative capillary discharge for laser plasma electron acceleration

Kameshima, Takashi; Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Kawase, Keigo; Fukuda, Yuji; Chen, L. M.; Homma, Takayuki; Kondo, Shuji; Bulanov, S. V.; et al.

no journal, , 

Recently, it is noticed to use discharge capillary for removing an acceleration length limit due to laser focus, which is one of problems to solve in laser plasma electron acceleration. Inside discharge plasma, laser propagates with its initial spot size kept and interacts plasma because the plasma distribution has the same refraction structure as optical fiber. In 2006, KEK, JAEA and Chinese Academy Engineering Physics (CAEP) carried out collaboration experiment. We succeeded the production of 560MeV electron beam by using discharge capillary. The experimental result will be reported.

Oral presentation

Laser electron acceleration in cm-scale capillary-discharge plasma channel

Kameshima, Takashi; Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Kawase, Keigo; Fukuda, Yuji; Chen, L. M.*; Homma, Takayuki; Kondo, Shuji; Esirkepov, T. Z.; et al.

no journal, , 

The acceleration method of laser plasma electron acceleration has very strong electric field, however, the acceleration length is veryshort. Hence, the energy gain of electron beams were confined to be approximately 100 MeV. Recently, this problem was solved by using discharge capillary. The feature of plasma was used that high dense plasma has low refractive index. Distributing plasma inside capillary as low dense plasma is in the center of capillary and high dense plasma is in the external side of capillary can make a laser pulse propaget inside capillary with initial focal spot size. Experiments with capillary were performed in China Academy of Engineering Physics (CAEP) and Japan Atomic Energy Agency (JAEA). We obtained the results of 4.4 J laser pulse optical guiding in 4 cm capillary and 0.56 GeV electron production in CAEP in 2006, and 1 J laser pulse optical guiding in 4 cm capillary and electron beams productions.

Oral presentation

Accelerator based BNCT using solid Li target at OIST

Matsumoto, Hiroshi*; Suzuki, Fumiko*; Sugawara, Hirotaka*; Yoshioka, Masakazu*; Higashi, Yasuo*; Matsumoto, Noriyuki*; Hasegawa, Kazuo; Kondo, Yasuhiro; Uchida, Kazuhide*; Kurokawa, Shinichi*

no journal, , 

8 (Records 1-8 displayed on this page)
  • 1