• Title/Summary/Keyword: Electron Accelerator

Search Result 255, Processing Time 0.032 seconds

A Study of the linear accelerator electron gun upgrade for system design (선형가속기 Upgrade 전자총 시스템설계에 관한 연구)

  • Son, Yoon-Gyu;Park, Sung-Ju;Kim, Kyung-Ryul;Nam, Sang-Hoon
    • Proceedings of the KIEE Conference
    • /
    • 2009.07a
    • /
    • pp.1373_1374
    • /
    • 2009
  • The PLS-II, the major upgrade program of the PLS (Pohang Light Source, a 2.5-GeV 3rd generation light source), is planned at the Pohang Accelerator Laboratory. Given the glaring lack of normative data regarding the PLS-II the major upgrade, this study can be seen as the first in a needed stream of research investigating selection by dual gun and dc electron gun. Usable electron gun can think method to use dual electron gun and method to prove energy by existing electron gun in energy increase. This article is concerned with the formal classification of used of pre-injector electron gun type of the DC and pulse. Design concept wishes to show contents that design for pulse type of power supply and DC type of electron gun.

  • PDF

PHOTO-NEUTRON SOURCE USING 2 GEV ELECTRON LINAC FOR RADIATION SHIELDING RESEARCH

  • Lee, Hee-Seock;Bak, Joo-Shik;Chung, Chin-Wha;Ban, Syuichi;Shin, Kazuo;Sato, Tatsuhiko
    • Journal of Radiation Protection and Research
    • /
    • v.26 no.3
    • /
    • pp.333-335
    • /
    • 2001
  • The 2 GeV electron linac, the injector of the Pohang Light Source, was used as a photo-neutron source for radiation shielding research. The operational beam parameters are the nominal electron intensity of $0.5\;{\sim}5\;nC/sec$, the repetition rate of 10 Hz, and the beam pulse length of 1.0 nsec. One electron beam line was modified in order to install the target systems for producing pulsed photo-neutrons. The neutron spectrum and intensity were investigated by the time-of-flight technique. The reliable maximum energy of the measured neutrons was about 500 MeV. The number of neutrons above 20 MeV produced by one 1 GeV electron in a thick Pb target was about $6.45{\times}10^{-4}/sr$ at 90 degrees to the beam axis. The status of the photo-neutron source and the application research are presented.

  • PDF

Study of Pulse Generator used Inverter HV Power Supply (인버터 고전압 전원공급장치를 이용한 펄스전원공급장치 연구)

  • Park S. S.;Kim S. H.;Hwang J. Y.;Nam S. H.;Lee K. T.;Kim H. G.
    • Proceedings of the KIPE Conference
    • /
    • 2004.07a
    • /
    • pp.64-67
    • /
    • 2004
  • The klystron-modulator(K&M) system of the Pohang Light Source(PLS) had been supplying high power microwaves for the acceleration of 2.5 GeV electron beams since October 2002. There are 12 sets of K&M systems to accelerate electron beams to 2.5GeV nominal beam energy. One module of the K&M system consists of an 80 MV S-band (2856 MHZ) klystron tube and the matching 200 MW modulator. In order to obtain electron beam of the consequently stability for linac, the pulse-to-pulse beam voltage regulation is less than $+/-0.5\%$. To get the reliable stability of the modulator which is less than $+/-0.5\%$, a charging section is improved in a modulator which has been operated with inverter power supply.

  • PDF

4th Generation Light Source: X-ray Free Electron Laser (4세대 방사광: 엑스선 자유전자레이저)

  • Han, Jang-Hui
    • Vacuum Magazine
    • /
    • v.3 no.4
    • /
    • pp.4-7
    • /
    • 2016
  • An X-ray Free Electron laser facility (PAL-XFEL) has been built in Pohang Accelerator Laboratory to provide X-ray FEL radiations for photon users. The machine consists of a 10 GeV normalconducting S-band linear accelerator and two undulator beamlines. The hard and soft X-ray beamlines will provide FEL radiations with wavelengths of 0.6 to 0.1 nm and 4.5 to 1 nm, respectively. Beam commissioning of PAL-XFEL is ongoing and user service will start in 2017. In this report, the PAL-XFEL layout and the working principle are discussed.

Development of a Wide Dose-Rate Range Electron Beam Irradiation System for Pre-Clinical Studies and Multi-Purpose Applications Using a Research Linear Accelerator

  • Jang, Kyoung Won;Lee, Manwoo;Lim, Heuijin;Kang, Sang Koo;Lee, Sang Jin;Kim, Jung Kee;Moon, Young Min;Kim, Jin Young;Jeong, Dong Hyeok
    • Progress in Medical Physics
    • /
    • v.31 no.2
    • /
    • pp.9-19
    • /
    • 2020
  • Purpose: This study aims to develop a multi-purpose electron beam irradiation device for preclinical research and material testing using the research electron linear accelerator installed at the Dongnam Institute of Radiological and Medical Sciences. Methods: The fabricated irradiation device comprises a dual scattering foil and collimator. The correct scattering foil thickness, in terms of the energy loss and beam profile uniformity, was determined using Monte Carlo calculations. The ion-chamber and radiochromic films were used to determine the reference dose-rate (Gy/s) and beam profiles as functions of the source to surface distance (SSD) and pulse frequency. Results: The dose-rates for the electron beams were evaluated for the range from 59.16 Gy/s to 5.22 cGy/s at SSDs of 40-120 cm, by controlling the pulse frequency. Furthermore, uniform dose distributions in the electron fields were achieved up to approximately 10 cm in diameter. An empirical formula for the systematic dose-rate calculation for the irradiation system was established using the measured data. Conclusions: A wide dose-rate range electron beam irradiation device was successfully developed in this study. The pre-clinical studies relating to FLASH radiotherapy to the conventional level were made available. Additionally, material studies were made available using a quantified irradiation system. Future studies are required to improve the energy, dose-rate, and field uniformity of the irradiation system.

Fs-THz beam line electron accelerator of pulse modulator design and fabrication (펨토 초-테라헤르츠 빔 라인용 펄스 모듈레이터의 설계와 제작)

  • Son, Yoon-Kyoo;Kwon, Sei-Jin;Suh, Jae-Hak;Jang, Sung-Duck;Kang, Heung-Sik;Lee, Kyung-Tae;Ro, Sung-Chae
    • Proceedings of the KIEE Conference
    • /
    • 2008.07a
    • /
    • pp.1322-1323
    • /
    • 2008
  • 기존의 펨토 초 레이저를 이용하여 발생시킨 테라 헤르츠 광원의 한계를 극복하기 위하여 대용량의 가속기를 이용한 테라 헤르츠 광원의 발생에 관한 연구가 활발히 진행되고 있다. 포항방사광 가속기연구소에서도 펨토 초 테라 헤르츠 빔을 이용한 분광학적인 방법을 사용하여 단백질 접힘과 DNA-단백질 간 상호작용, 화학적, 생물학적인 반응 동력학 등에 관한 연구와 영상 기술개발 등을 할 계획을 가지고 펨토초 테라 헤르츠 빔 라인을 건설 중에 있다. 펨토 초-테라 헤르츠 빔 라인의 마이크로웨이브를 가속하는 장치에 사용되는 전원장치의 설계와 제작 및 시험과정을 외국기술에 의존하지 않고 순수 국내기술로 실현하였다. 본 논문에서는 펄스 모듈레이터의 설계와 실험결과를 보이고자 한다.

  • PDF

Shielding Design of Electron Beam Accelerators Using Supercomputer (슈퍼컴을 이용한 전자빔가속기의 차폐설계)

  • Kang, Won Gu;Kim, In Soo;Kuk, Sung Han;Kim, Jin Kyu;Han, Bum Soo;Jeong, Kwang Young;Kang, Chang Mu
    • Journal of Radiation Industry
    • /
    • v.4 no.1
    • /
    • pp.33-38
    • /
    • 2010
  • The MCNP5 neutron, electron, photon Monte Carlo transport program was installed on the KISTI's SUN Tachyon computer using the parallel programming. Electron beam accelerators were modeled and shielding calculations were performed in order to investigate the reduction of computation time in the supercomputer environment. It was observed that a speedup of 40 to 80 of computation time can be obtained using 64 CPUs compared to an IBM PC.

The Development of Beam Profiling System for the Analysis of Pulsed Gamma-ray Using the Electron Accelerator (전자빔가속기를 이용한 펄스감마선 출력특성 분석용 빔프로파일링 장치개발)

  • Hwang, Young-Gwan;Lee, Nam-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.20 no.12
    • /
    • pp.2410-2416
    • /
    • 2016
  • Recently, most countries in the world have pursued a denuclearization. So it has been of interest to increase to Nuclear weapon in such as North Korea's continued nuclear test. Pulsed gamma rays produced in the nuclear explosion and the space environment can give the big damage to the electronic device in a very short period of time. To confirm the extent of damage of these electronic devices, pulsed gamma irradiation facility that can occur in nuclear weapon or space environment are required. In this paper, we implemented the pulsed gamma-ray detection module and analyzed output of the irradiation test. We have experimented using an electron beam accelerator research facilities in Pohang Accelerator similar conditions to equip and Nuclear weapon. As a result, we confirmed that the pulsed gamma rays emitted by the gamma radiation and electron beam conversion device. The results of this paper will contribute to improve the reliability and accuracy of studies for utilizing pulsed gamma rays.

Design of High Power RF Amplifier (고출력 고주파 증폭기의 설계)

  • Nam, S.H.;Jeon, M.H.;Kim, Y.S.
    • Proceedings of the KIEE Conference
    • /
    • 1994.07a
    • /
    • pp.180-182
    • /
    • 1994
  • In an electron storage ring of Pohang Light Source (PLS), electrons lose their energy in every turn by the synchronous radiation. A high power RF amplifier is employed to compensate the electron energy that is lost by the synchronous radiation. The specification of RF amplifier is an continuous output power of 60 kW at 500.082 MHz operating frequency. The power is supplied to RF cavities in the storage ring tunnel. Total number of amplifier system currently required is three. Tile total number will be increased upto five as the operating condition of storage ring is upgraded. The RF amplifier is mainly consisted of a high voltage DC power supply, an intermediate RF power amplifier (IPA), and a klystron tube. In this article, the design of RF amplifier system and characteristics of the klystron tube will be discussed.

  • PDF