共查询到17条相似文献,搜索用时 93 毫秒
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康普顿背散射技术对贮存环电子束诊断及其应用——I电子束能量的精确测量及光学标准实验站 总被引:1,自引:1,他引:0
简单叙述了采用康普顿背散射技术精确测量电子束能量的技术,并指出建立辐射标准实验站对精确电子束能量测量的需求. The technique to measure the electron beam energy accurately with Compton backscattering technique is introduced and requirements for the experimental stations of radiometry are also described in the paper. 相似文献
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简单叙述了采用康普顿背散射技术精确测量电子束能量的技术,并指出建立辐射标准实验站对精确电子束能量测量的需求. The technique to measure the electron beam energy accurately with Compton backscattering technique is introduced and requirements for the experimental stations of radiometry are also described in the paper. 相似文献
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激光具有高强度、 高极化度等优异的性能。 用激光束轰击高能电子束就可以产生高强度、 高极化度的γ射线束。 上海激光电子γ源就是上海同步辐射装置上的这样一条束线站。 预计可以获得能量范围为1—22 MeV的准单色、 高强度(109—1011 s-1)和高极化度(线极化或圆极化)的γ射线束。 介绍了这条束线站目前的进展情况。 Shanghai Laser Electron Gamma Source (SLEGS) is a high intensity,short pulse and compact γ ray source which is based on inverse Compton scattering via interaction between pulsed high power laser beams and picosecond relativistic electron bunches. One of the attractive features of the laser Compton scattering is the easy control of polarization of the produced high energy photons that duplicates polarization of the applied laser beam. The γ ray with energy up to 22 MeV and intensity of 109—1011s 1 are expected to be produced by Compton backscattering of CO2 laser photons on the 3.5 GeV electrons bunches in the Shanghai Synchrotron Radiation Facility (SSRF). In this communication, we report same simulation results and the progressing status of SLEGS. 相似文献
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利用SLEGS开展夸克和胶子层次上的核物理研究 总被引:1,自引:1,他引:0
通过对国际上中能核物理的发展,特别是前沿领域中的现状的回顾,阐述了利用在上海原子核所计划建造的第三代同步辐射加速器(SSRF)上建立新一代的激光 电子康普顿背散射γ射线源(SLEGS)从事夸克和胶子层次上的中能核物理研究的科学目标及研究内容. The proposed SLEGS (Shanghai Laser Electron backscattering Gamma Source) will be a circular and linear polarization, new generation, high quality γ ray source with Eγ=0.2-0.87 GeV. The major scientific focus of nuclear physics research at SLEGS will be investigations of the microscopic quark gluon aspects of nucleons , nucleon resonance states and nuclei to test and develop non perturbative QCD. Using polarized photon induced reactions on unpolarized and polarized nucleon target such as γN→γ N, ... 相似文献
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Shanghai Laser Electron Gamma Source, a high intensity beam line of γ-ray, is expected to generate γ-rays up to the maximum energy of 22 MeV by Compton backscattering between a CO2 laser and electrons in the 3.5 GeV storage ring of the Shanghai Synchrotron Radiation Facility. The luminosity of SLEGS γ-ray beam is estimated to be 7×107 A-1W-1s-1 in a optimized setup. Indirect measurement of cross section of the key nuclear-astrophysics reaction 12C(α,γ)16O and γ-ray-triggered transmutation of long-lived radioactive wastes are discussed based on the estimated SLEGS γ-ray beam properties. 相似文献
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Based on the facility of the Shanghai Laser Electron Gamma Source (SLEGS), the transmutation for nuclear wastes such as 137Cs and 129I is investigated. It is found that nuclear waste can be transmuted efficiently via photonuclear reaction triggered by gamma photons generated from Compton backscattering between CO2 laser photons and 3.5 GeV electrons. The nuclear activities of 137Cs and 129I are evaluated and compared with the results of transmutation triggered by bremsstrahlung gamma photons driven by ultra intense laser. Due to the better character of gamma photon spectrum as well as the high brightness of gamma photons, the transmutation rate of Compton backscattering method is much higher than that of the bremsstrahlung method. 相似文献
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莫晓虎 《中国物理C(英文版)》2014,(10):56-64
The beam energy is measured in the e^+e^- collision by using Compton backscattering. The uncertainty of this measurement process is studied by virtue of analytical formulas, and the special effects of variant energy spread and energy drift on the systematic uncertainty estimation are also studied with the Monte Carlo sampling technique. These quantitative conclusions are especially important for understanding the uncertainty of the beam energy measurement system. 相似文献
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简要介绍了圆偏振激光在极化电子束上的Compton散射理论,研究了北京正负电子对撞机(BEPC)极化仪的测量原理,并根据BEPC极化仪的实验参数计算了散射的能谱、空间分布和强度.The theory of Compton scattering of polarized photons on polarized electrons, and the principle of Beijing Electron Positron Collider (BEPC) Compton polarimeter are shortly discussed. The energy spectrum, vertical distributions and the intensity of Compton scattering under particular conditions are also calculated. 相似文献
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以γN→πN′反应为例说明了极化实验的类型、自旋观测量同独立幅度的关系、实验上如何得到自旋观测量及实现完全测量等.也介绍了极化固体靶的原理和结构、靶材料的选取原则和适合遍举测量的4π型谱仪及其国际状况等.光致反应中的极化实验和遍举测量将是使用SLEGS从事核物理实验的重要手段. The relationship between polarization observables and indepedent amplitudes, measurements of polarization observables and complete measurement for γN→πN′ are illustrated. The principle and structure of polarization nucleon solid targets, the principle of choosing target material and 4π detectors suitable for exclusive measurements are discussed. The polarization experiments and exclusive measurements are very singnificant for SLEGS. 相似文献
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J. Diefenbach Y. Imai J. Han Lee F. Maas S. Taylor 《The European Physical Journal A - Hadrons and Nuclei》2007,32(4):555-559
For modern parity violation experiments it is crucial to measure and monitor the electron beam polarization continuously.
In the recent years different high-luminosity concepts, for precision Compton backscattering polarimetry, have been developed,
to be used at modern CW electron beam accelerator facilities. As Compton backscattering polarimetry is free of intrinsic systematic
uncertainties, it can be a superior alternative to other polarimetry techniques such as M?ller and Mott scattering. State-of-the-art
high-luminosity Compton backscattering designs currently in use and under development at JLab and Mainz are compared to each
other. The latest results from the Mainz A4 Compton polarimeter are presented. 相似文献
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We developed a continuous-spectrum light beam from Compton backscattering by using coherent synchrotron radiation in an L-band linac at the Kyoto University Research Reactor Institute. The ratio of Compton backscattered photons to background photons when coherent synchrotron radiation was used was three times larger than when coherent transition radiation was used. The transmission spectrum of a polystyrene film in the terahertz-wave region was evaluated by measuring the spectrum of the Compton backscattered photons and it roughly agreed with that measured by a Martin–Puplett-type interferometer. The spectrophotometry using Compton backscattering shows promise as a new tool for investigations in terahertz-wave science. 相似文献
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A simulation of electron cooling process for the heavy ion beam in the proposed HIRFL Cooler-Storage Ring(HIRFL-CSR)is performed by taking into account the betatron and synchrotron oscilations of single particle.The continuous evolution of ion beam emittances and relative momentum spread are shown.Some factors that influence the cooling speed,like the space charge effect of electron beam,the dispersion in cooler section and the electron beam transverse temperature are presented. 相似文献
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The beam energy is measured in the e+e-collision by using Compton backscattering. The uncertainty of this measurement process is studied by virtue of analytical formulas, and the special effects of variant energy spread and energy drift on the systematic uncertainty estimation are also studied with the Monte Carlo sampling technique. These quantitative conclusions are especially important for understanding the uncertainty of the beam energy measurement system. 相似文献
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K.Kawase M.Kando T.Hayakawa I.Daito S.Kondo T.Homma T.Kameshima H.Kotaki L.Chen Y.Fukuda A.Faenov Shizuma S.V.Bulanov T.Kimura T.Tajima M.Shoji S.Suzuki K.Tamura H.Ohkuma Y.Arimoto T.Yorita M.Fujiwara S.Okajima 《原子核物理评论》2009,26(Z1)
Recently we have constructed two facilities for generating photon beams in the MeV and sub-MeV energy regions by means of the Compton backscattering with a laser and an electron beam at SPring-8 and at Kansai Photon Science Institute of Japan Atomic Energy Agency(KPSIJAEA).The MeV-photon source at SPring-8 consists of a continuous-wave optically-pumped far infrared laser with a wavelength of 118.8 μm and an 8 GeV stored electron beam.Present MeV-photon flux is estimated to be 1.3×10~3 photons/s.On the other hand,the sub-MeV-photon source at KPSI-JAEA consists of a pulse Nd:YAG laser with a wavelength of 1 064 nm and a 150 MeV electron beam accelerated by microtron.In the first trial of the photon production in this source,backscattered photon flux is estimated to be 20 photons/pulse.Both the Compton backscattered photon sources have possibilities to be used for new tools in various fields such as nuclear physics,materials science,and astronomy. 相似文献