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  Subjects -> PHYSICS (Total: 774 journals)
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    - MECHANICS (19 journals)
    - NUCLEAR PHYSICS (46 journals)
    - OPTICS (91 journals)
    - PHYSICS (563 journals)
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PHYSICS (563 journals)                  1 2 3 4 5 6 | Last

Acta Acustica united with Acustica     Full-text available via subscription   (Followers: 7)
Acta Mechanica     Hybrid Journal   (Followers: 15)
Advanced Composite Materials     Hybrid Journal   (Followers: 16)
Advanced Functional Materials     Hybrid Journal   (Followers: 39)
Advanced Materials     Hybrid Journal   (Followers: 407)
Advances in Condensed Matter Physics     Open Access   (Followers: 8)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 3)
Advances in Geophysics     Full-text available via subscription   (Followers: 5)
Advances in High Energy Physics     Open Access   (Followers: 12)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 3)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 16)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 14)
Advances in OptoElectronics     Open Access   (Followers: 3)
Advances In Physics     Hybrid Journal   (Followers: 9)
Advances in Physics Theories and Applications     Open Access   (Followers: 8)
Advances in Remote Sensing     Open Access   (Followers: 9)
AIP Advances     Open Access   (Followers: 6)
AIP Conference Proceedings     Full-text available via subscription   (Followers: 2)
American Journal of Applied Sciences     Open Access   (Followers: 31)
American Journal of Condensed Matter Physics     Open Access   (Followers: 5)
American Journal of Signal Processing     Open Access   (Followers: 8)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 2)
Annalen der Physik     Hybrid Journal   (Followers: 3)
Annales Geophysicae (ANGEO)     Open Access   (Followers: 4)
Annales Henri PoincarĂ©     Hybrid Journal   (Followers: 1)
Annales UMCS, Physica     Open Access  
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 3)
Annals of Physics     Hybrid Journal   (Followers: 3)
Annals of West University of Timisoara - Physics     Open Access  
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 1)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 9)
Annual Review of Condensed Matter Physics     Full-text available via subscription   (Followers: 1)
Annual Review of Materials Research     Full-text available via subscription   (Followers: 4)
APL Materials     Open Access   (Followers: 6)
Applied Composite Materials     Hybrid Journal   (Followers: 9)
Applied Physics     Open Access  
Applied Physics A     Hybrid Journal   (Followers: 9)
Applied Physics Frontier     Open Access   (Followers: 1)
Applied Physics Letters     Hybrid Journal   (Followers: 26)
Applied Physics Research     Open Access   (Followers: 6)
Applied Physics Reviews     Hybrid Journal   (Followers: 8)
Applied Radiation and Isotopes     Hybrid Journal   (Followers: 5)
Applied Remote Sensing Journal     Open Access   (Followers: 9)
Applied Spectroscopy     Full-text available via subscription   (Followers: 12)
Applied Spectroscopy Reviews     Hybrid Journal   (Followers: 2)
Archive for Rational Mechanics and Analysis     Hybrid Journal   (Followers: 3)
Asia Pacific Physics Newsletter     Hybrid Journal  
ASTRA Proceedings     Open Access  
Astronomy & Geophysics     Hybrid Journal   (Followers: 2)
Astrophysical Journal Letters     Full-text available via subscription   (Followers: 3)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 3)
Atoms     Open Access  
Attention, Perception & Psychophysics     Full-text available via subscription   (Followers: 9)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Axioms     Open Access  
Bangladesh Journal of Medical Physics     Open Access  
Bauphysik     Hybrid Journal   (Followers: 1)
Biomaterials     Hybrid Journal   (Followers: 34)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 14)
Biomedical Imaging and Intervention Journal     Open Access   (Followers: 5)
Biophysical Reviews     Hybrid Journal  
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 3)
BMC Biophysics     Open Access   (Followers: 7)
BMC Nuclear Medicine     Open Access   (Followers: 5)
Brazilian Journal of Physics     Hybrid Journal  
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Bulletin of Materials Science     Open Access   (Followers: 39)
Bulletin of the Atomic Scientists     Full-text available via subscription   (Followers: 4)
Bulletin of the Lebedev Physics Institute     Hybrid Journal   (Followers: 1)
Bulletin of the Russian Academy of Sciences: Physics     Hybrid Journal  
Caderno Brasileiro de Ensino de FĂ­sica     Open Access  
Canadian Journal of Physics     Full-text available via subscription   (Followers: 1)
Cells     Open Access   (Followers: 1)
Central European Journal of Physics     Hybrid Journal   (Followers: 1)
CERN courier. International journal of high energy physics     Free  
Chinese Journal of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 1)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
Chinese Physics B     Full-text available via subscription  
Chinese Physics C     Full-text available via subscription  
Chinese Physics Letters     Full-text available via subscription  
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Colloid Journal     Hybrid Journal   (Followers: 2)
Communications in Mathematical Physics     Hybrid Journal   (Followers: 2)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 3)
Communications in Theoretical Physics     Full-text available via subscription   (Followers: 1)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 55)
Composites Part B : Engineering     Hybrid Journal   (Followers: 79)
Computational Astrophysics and Cosmology     Open Access  
Computational Materials Science     Hybrid Journal   (Followers: 19)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 1)
Computational Particle Mechanics     Hybrid Journal  
Computational Science and Discovery     Full-text available via subscription  
Computer Physics Communications     Hybrid Journal  
Contemporary Concepts of Condensed Matter Science     Full-text available via subscription  
Contemporary Physics     Hybrid Journal   (Followers: 12)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 3)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 2)
COSPAR Colloquia Series     Full-text available via subscription   (Followers: 1)
Cryogenics     Hybrid Journal   (Followers: 18)

        1 2 3 4 5 6 | Last

Journal Cover   Chinese Physics C
  [SJR: 0.367]   [H-I: 12]   Follow
    
   Full-text available via subscription Subscription journal
   ISSN (Print) 1674-1137
   Published by Institute of Physics (IOP) Homepage  [70 journals]
  • Predicting lepton flavor mixing from ?(48) and generalized CP
           symmetries
    • Authors: Ding Gui-Jun; Zhou Ye-Ling
      First page: 021001
      Abstract: We propose to understand the mixing angles and CP -violating phases from the ?(48) family symmetry combined with the generalized CP symmetry. A model-independent analysis is performed by scanning all the possible symmetry breaking chains. We find a new mixing pattern with only one free parameter, excellent agreement with the observed mixing angles can be achieved and all the CP -violating phases are predicted to take nontrivial values. This mixing pattern is testable in the near future neutrino oscillation and neutrinoless double-beta decay experiments. Finally, a flavor model is constructed to realize this mixing pattern.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Is J PC = 3 ?+ molecule possible?
    • Authors: Zhu Wei; Liu Yan-Rui Yao Tao
      First page: 023101
      Abstract: The confirmation of charged charmonium-like states indicates that heavy quark molecules should exist. Here we discuss the possibility of a molecule state with J PC = 3 ?+ . In a one-boson-exchange model investigation for the S wave C = + D*D? 2 * states, one finds that the strongest attraction is in the case J = 3 and I = 0 for both ? and ? exchanges. Numerical analysis indicates that this hadronic bound state might exist if a phenomenological cutoff parameter around 2.3 GeV (1.5 GeV) is reasonable with a dipole (monopole) type form factor in the one-pion-exchange model. The cutoff for binding solutions may be reduced to a smaller value once the ? exchange contribution is included. If a state around the D*D? 2 * threshold (?4472 MeV) in the channel J/?? ( P wave) is observed, the heavy quark spin symmetry implies that it is not a cc? meson and the J PC are likely to be 3 ?+
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Study of the ???Ve + e ? decay with hidden local symmetry
           model
    • Authors: Yang Yue-Ling; Huang Jin-Shu Lu Gong-Ru
      First page: 023102
      Abstract: Within the hidden local symmetry framework, the Dalitz decay ???Ve + e ? is studied with the vector meson dominance model. It is found that the partial width ?(????e + e ? ) ? 40 eV and branching ratio ?(????e + e ? ) ? 2?10 ?4 , and ?(????e + e ? ) ? 10?(????e + e ? ) and ?(????e + e ? ) ? 10?(????e + e ? ). The maximum position of the dilepton distribution is m e+e? ?1.33 MeV. These decays are measurable with the advent of high statistic ?? experiments.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Constraining parameter space of the little Higgs model using data from
           tera-Z factory and ILC
    • Authors: Guo Xing-Dao; Feng Tai-Fu, Zhao Shu-Min, Ke Hong-Wei Li Xue-Qian
      First page: 023103
      Abstract: The Standard Model (SM) prediction on the forward-backward asymmetry for bb? production ( A b FB )is well consistent with the data of LEP I at the Z-pole, but deviates from the data at ? s?=?89.55 and 92.95 GeV which are slightly away from the pole. This deviation implies that there is still room for new physics. We calculate the A b FB at the vicinity of the Z-pole in the little Higgs model as well as other measurable parameters such as R b and R c , by which we may constrain the parameter space of the little Higgs model. This can be further tested in the newly proposed tera-Z factory. With the fitted parameters we further make predictions on A b FB and A t FB for tt? production at the International Linear Collider (ILC).
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Spin-dependent ? softness or triaxiality in even-even 132?138 Nd
           nuclei
    • Authors: Chai Qing-Zhen; Wang Hua-Lei, Yang Qiong Liu Min-Liang
      First page: 024101
      Abstract: The properties of ? instability in rapidly rotating even-even 132?138 Nd isotopes have been investigated using the pairing-deformation self-consistent total-Routhian-surface calculations in a deformation space of (? 2 , ?, ? 4 ). It is found that even-even 134?138 Nd nuclei exhibit triaxiality in both ground and excited states, even up to high-spin states. The lightest isotope possesses a well-deformed prolate shape without a ? deformation component. The current numerical results are compared with previous calculations and available observables such as quadrupole deformation ? 2 and the feature of ?-band levels, showing basically a general agreement with the observed trend of ? correlations (e.g. the pattern of the odd-even energy staggering of the ? band). The existing differences between theory and experiment are analyzed and discussed briefly.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Investigation of proton radioactivity with the effective liquid drop model
    • Authors: Sheng Zong-Qiang; Shu Liang-Ping, Fan Guang-Wei, Meng Ying Qian Jian-Fa
      First page: 024102
      Abstract: Proton radioactivity has been investigated using the effective liquid drop model with varying mass asymmetry shapes and effective inertial coefficients. An effective nuclear radius constant formula replaces the old empirical one in the calculations. The theoretical half-lives are in good agreement with the available experimental data. All the deviations between the calculated logarithmic half-lives and the experimental values are less than 0.8. The root-mean-square (rms) deviation is 0.523. Predictions for the half-lives of proton radioactivity are made for elements across the periodic table. From the theoretical results, there are 11 candidate nuclei for proton radioactivity in the region Z 83, no nuclei are suggested as probable candidate nuclei for proton radioactivity within the selected range of half-lives studied.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Study on the novel neutron-to-proton convertor for improving the detection
           efficiency of a triple GEM based fast neutron detector
    • Authors: Wang Xiao-Dong; Yang He-Run, Ren Zhong-Guo, Zhang Jun-We, Yang Lei, Zhang Chun-Hui, Ha Ri-Ba-La, An L?-Xing Hu Bi-Tao
      First page: 026001
      Abstract: A high-efficiency fast neutron detector prototype based on a triple Gas Electron Multiplier (GEM) detector, which, coupled with a novel multi-layered high-density polyethylene (HDPE) as a neutron-to-proton converter for improving the neutron detection efficiency, is introduced and tested with the Am-Be neutron source in the Institute of Modern Physics (IMP) at Lanzhou in the present work. First, the developed triple GEM detector is tested by measuring its effective gain and energy resolution with 55 Fe X-ray source to ensure that it has a good performance. The effective gain and obtained energy resolution is 5.0?10 4 and around 19.2%, respectively. Secondly, the novel multi-layered HDPE converter is coupled with the cathode of the triple GEM detector making it a high-efficiency fast neutron detector. Its effective neutron response is four times higher than that of the traditional single-layered conversion technique when the converter layer number is 38.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Calibration study of the X-T relation for the BESIII drift chamber
    • Authors: Kang Xiao-Lin; Wu Ling-Hui, Wu Zhi, Luo Tao, Hu Chen, Wang Hai-Xia, Fang Shuang-Shi, He Kang-Lin, Li Wei-Dong, Li Wei-Guo, Liu Huai-Min, Mao Ze-Pu, Wang Liang-Liang, Yuan Ye Zhang Yao
      First page: 026002
      Abstract: Offline calibration plays an important role in BESIII offline data processing. In order to achieve good spatial and momentum resolution, it is necessary to implement high precision offline calibration for the BESIII drift chamber. This paper studies the time-to-distance relations, which are important calibration constants for track reconstruction. The parameterization of the time-to-distance relation, studies of left-right asymmetry and studies of variation with entrance angle are performed. The impact of dead channels on the time-to-distance relation is given special attention in order to reduce the shift in measured momentum for tracks passing near dead cells. Finally we present the resolutions for barrel Bhabha events ( cos ?
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • A high-precision multi-channel TAC and QAC module for the neutron
           detection wall
    • Authors: She Qian-Shun; Su Hong, Qian Yi Yu Yu-Hong
      First page: 026101
      Abstract: A single width NIM module that includes eight channels of the time-to-amplitude converter (TAC) and the charge-to-amplitude converter (QAC) is introduced in the paper, which is designed for the large neutron wall detector to measure charge (energy) and time interval simultaneously. The module adopts a high precision gated integration circuit to realize TAC and QAC. The input range of TAC is from 30 ns to 1 ?s, and the input range of QAC is from 40 pC to 600 pC. The linearity error of TAC is lower than 1.28%, and the time resolution of TAC is less than 0.871%. The linearity error of QAC is lower than 0.81%, and the resolution of QAC is better than 0.936%.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Simulation of 200?400 MeV/u 12 C+ 12 C elastic scattering on SHARAQ
           spectrometer
    • Authors: Yu Lei; Zhang Gao-Long, S. Terashima, I. Tanihata Le Xiao-Yun
      First page: 026201
      Abstract: In order to further obtain the information of three-body force (TBF) from 200?400 MeV/u 12 C+ 12 C elastic scattering, we plan to perform this experiment on a SHARAQ spectrometer. Based on the experimental condition of the Radioactive Ion Beam Factory (RIBF)-SHARAQ facility, a simulation is given to find a compromise between the better energy and angular resolutions, and higher yield by optimizing the target thickness, beam transport mode, beam intensity and angular step. From the simulation, we found that the beam quality mainly limits the improvements of energy and angular resolutions. A beam tracking system as well as a lateral and angular dispersion-matching technique are adopted to reduce the influence of beam quality. According to the two angular settings of SHARAQ as well as the expected cross sections on the basis of the theoretical model, the energy and angular resolutions, and statistical accuracy are estimated.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Transverse profile expansion and homogenization at target for the injector
           Scheme- I test stand of China-ADS
    • Authors: Yang Zheng; Tang Jing-Yu, Yan Fang, Pei Shi-Lun, Chen Yuan, Li Zhi-Hui Geng Hui-Ping
      First page: 027001
      Abstract: For the injector Scheme- I test stand of the China-ADS (Accelerator Driven subcritical System), a beam with the maximum power of 100 kW will be produced and transported to the beam dump. To solve the very high thermal load problem at the dump, two measures are taken to deal with the huge power density at the target. One is to enlarge the contact area between the beam and the target, and this is to be accomplished by expanding the beam profile at the target and using slanted target plates. The other is to produce a more homogenous beam profile at the target to minimize the maximum power density. Here the beam dump line is designed to meet the requirement of beam expansion and homogenization at 3 different energies (3.2 MeV, 5 MeV and 10 MeV), and the step-like field magnets are employed for the beam spot homogenization. Taking into account the fact that the space charge effects are very strong at such low beam energies, the simulations have included space charge effects and errors...
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Design and performance of the LLRF system for CSNS/RCS
    • Authors: Li Xiao; Sun Hong, Long Wei, Zhao Fa-Cheng Zhang Chun-Lin
      First page: 027002
      Abstract: The rapid cycling synchrotron (RCS) is part of the China Spallation Neutron Source (CSNS). The RCS provides 1.6 GeV protons with a repetition rate of 25 Hz. The RF system in RCS is mainly composed of a ferrite loaded RF cavity, a high power tetrode amplifier, a bias supply of 3300 A and a digital low level RF (LLRF) system based on FPGA. The major challenge of the LLRF system is to solve problems caused by rapid frequency sweeping and the heavy beam loading effect. A total of eight control loops are applied to ensure the normal operation. An effective feedforward scheme is widely used to improve the dynamic performance of the system. The design of the LLRF system and high power integration test results with the prototype RF system are presented.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Multipacting saturation in parallel plate and micro-pulse electron gun
    • Authors: Liao Lang; Zhang Meng Zhao Ming-Hua
      First page: 027003
      Abstract: A novel parallel plate model is proposed that divides the electron cloud into three parts at saturation, and it is studied in detail using both an analytical approach and particle-in-cell (PIC) code simulations. As one part of the electron cloud, ribbons modes are suggested by tracking the trajectory of individual particles, and the aim of this mode form is to simplify the progress of the multipacting effect in the parallel plate so as to be eliminated by optimizing RF parameters. The micro-pulse electron gun (MPG) has demonstrated the potential to address the need for high peak and average current electron beams, hence studying the multipacting in MPG is essential. On the basis of studying multipacting in the parallel plate, it is clear that increasing the cavity voltage is of interest in yielding high quality beams in the gun.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Simulation of beam gas coulomb scattering in HALS
    • Authors: Yu Lu-Xin; Gao Wei-Wei, Wang Lin Li Wei-Min
      First page: 027004
      Abstract: In conventional research on beam gas coulomb scattering (BGCS), only the related beam lifetime using the analytical method is studied. In this paper, using the particle-in-cell Monte Carlo collisions (PIC-MCC) method, we not only simulated the beam lifetime but also explored the effect of BGCS on the beam distribution. In order to better estimate the effect on particle distribution, we study the ultra-low emittance electron beam. Here we choose the HeFei Advanced Light Source. By counting the lost particles in a certain time, the corresponding beam lifetime we simulated is 4.8482 h/13.8492 h in x / y , which is very close to the theoretic value (5.0555 h /13.7024 h in x / y ). By counting the lost particles relative to the collided particles, the simulated value of the loss probability of collided particles is 1.3431e-04, which is also very close to the theoretical value (1.3824e-04). Besides, the simulation shows there is a tail in the transverse distributi...
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Electromagnetic characteristics of the CH cavity
    • Authors: Xu Meng-Xin; He Yuan, Wang Feng-Feng, Zhang Sheng-Hu, Huang Shi-Chun, Huang Yu-Lu, Zhao Hong-Wei Xia Jia-Wen
      First page: 027005
      Abstract: In this paper, we present the RF simulation, the fabrication and the normal RF test of a six-cell copper model cross bar H mode (CH) cavity. The CH cavity was researched and developed at the Institute of Modern Physics for Injector II of the superconducting linac of the accelerator driven system of China, operating at a frequency 162.5 MHz, ?=0.065. The deep drawing and electron beam welding were employed to fabricate this cavity, which would be used to develop the superconducting CH cavity in the future. The results of the normal RF test agree with the simulation of the electromagnetic properties, such as the electric field distribution on the cavity axis, frequency and Q factor.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Local structure and optical absorption characteristic investigation on Fe
           doped TiO 2 nanoparticles
    • Authors: Zhao Tian-Xing; Feng Ya-Juan, Huang Jun-Heng, He Jin-Fu, Liu Qing-Hua, Pan Zhi-Yun Wu Zi-Yu
      First page: 028001
      Abstract: The local structures and optical absorption characteristics of Fe doped TiO 2 nanoparticles synthesized by the sol-gel method were characterized by X-ray diffraction (XRD), X-ray absorption fine structure spectroscopy (XAFS) and ultraviolet-visible absorption spectroscopy (UV-Vis). XRD patterns show that all Fe-doped TiO 2 samples have the characteristic anatase structure. Accurate Fe and Ti K-edge EXAFS analysis further reveal that all Fe atoms replace Ti atoms in the anatase lattice. The analysis of UV-Vis data shows a red shift to the visible range. According to the above results, we claim that substitutional Fe atoms lead to the formation of structural defects and new intermediate energy levels appear, narrowing the band gap and extending the optical absorption edge towards the visible region.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Single-shot measurement of free-electron laser polarization at SDUV-FEL
    • Authors: Feng Lie; Deng Hai-Xiao, Zhang Tong, Feng Chao, Chen Jian-Hui, Wang Xing-Tao, Lan Tai-He, Shen Lei, Zhang Wen-Yan, Yao Hai-Feng, Liu Xiao-Qing, Liu Bo Wang Dong
      First page: 028101
      Abstract: In this paper, a division-of-amplitude photopolarimeter (DOAP) for measuring the polarization state of a free-electron laser (FEL) pulse is described. The incident FEL beam is divided into four separate beams, and four Stokes parameters can be measured in a single-shot. In the crossed-planar undulators experiment at the Shanghai deep ultraviolet FEL test facility, this DOAP instrument constructed in house responsed accurately and timely while the polarization-state of fully coherent FEL pulses were switched, which is helpful for confirming the crossed-planar undulators technique for short-wavelength FELs.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
  • Design and test of frequency tuner for a CAEP high power THz free-electron
           laser
    • Authors: Mi Zheng-Hui; Zhao Dan-Yang, Sun Yi, Pan Wei-Min, Lin Hai-Ying, Lu Xiang-Yang, Quan Sheng-Wen, Luo Xing, Li Ming, Yang Xing-Fan, Wang Guang-Wei, Dai Jian-Ping, Li Zhong-Quan, Ma Qiang Sha Peng
      First page: 028102
      Abstract: Peking University is developing a 1.3 GHz superconducting accelerating section highpower THz free-electron laser for the China Academy of Engineering Physics (CAEP). A compact fast/slow tuner has been developed by the Institute of High Energy Physics (IHEP) for the accelerating section to control Lorentz detuning, compensate for beam loading effect, microphonics and liquid helium pressure fluctuations. The tuner design, warm test and cold test of the first prototype are presented, which has a guiding significance for the manufacture of the formal tuner and cryomodule assembly.
      Citation: Chinese Physics C
      PubDate: 2015-02-20T00:00:00Z
      Issue No: Vol. 39, No. 2 (2015)
       
 
 
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