X-ray sources with tunable energy spectra have a wide range of applications in different scenarios due to their different penetration depths.However,existing x-ray sources face difficulties in terms of energy regulati...X-ray sources with tunable energy spectra have a wide range of applications in different scenarios due to their different penetration depths.However,existing x-ray sources face difficulties in terms of energy regulation.In this paper,we present a scheme for tuning the energy spectrum of a betatron x-ray generated from a relativistic electron bunch oscillating in a plasma wakefield.The center energy of the x-ray source can be tuned from several keV to several hundred keV by changing the plasma density,thereby extending the control range by an order of magnitude.At different central energies,the brightness of the betatron radiation is in the range of 3.7×10^(22)to 5.5×10^(22)photons/(0.1%BW·s·mm^(2)·mrad^(2))and the photon divergence angle is about 2 mrad.This high-brightness,energy-controlled betatron source could pave the way to a wide range of applications requiring photons of specific energy,such as phase-contrast imaging in medicine,non-destructive testing and material analysis in industry,and imaging in nuclear physics.展开更多
We present complete next-to-leading-order(NLO)QCD correction and electro-weak(EW)correction to the production cross section of Higgs–Boson in association with two hard quark jets by using Monte-Carlo numerical calcul...We present complete next-to-leading-order(NLO)QCD correction and electro-weak(EW)correction to the production cross section of Higgs–Boson in association with two hard quark jets by using Monte-Carlo numerical calculation program,HAWK,for various photon parton distribution functions at the Large Hadron Collider with center of mass energy 7,8,13,and 14 TeV without and with typical vector-Boson-fusion cuts on the tagging jets.In our calculation we include complete contribution from the full set of t-channel,u-channel and s-channel Feynman diagrams,and corresponding interferences as well as NLO QCD and EW corrections.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos.11921006 and 12175058)the Beijing Distinguished Young Scientist Program and National Grand Instrument Project (Grant No.SQ2019YFF01014400)+1 种基金the Beijing Municipal Science&Technology Commission,Administrative Commission of Zhongguancun Science Park (Grant No.Z231100006023003)in part funded by United Kingdom EPSRC (Grant Nos.EP/G054950/1,EP/G056803/1,EP/G055165/1,and EP/M022463/1)。
文摘X-ray sources with tunable energy spectra have a wide range of applications in different scenarios due to their different penetration depths.However,existing x-ray sources face difficulties in terms of energy regulation.In this paper,we present a scheme for tuning the energy spectrum of a betatron x-ray generated from a relativistic electron bunch oscillating in a plasma wakefield.The center energy of the x-ray source can be tuned from several keV to several hundred keV by changing the plasma density,thereby extending the control range by an order of magnitude.At different central energies,the brightness of the betatron radiation is in the range of 3.7×10^(22)to 5.5×10^(22)photons/(0.1%BW·s·mm^(2)·mrad^(2))and the photon divergence angle is about 2 mrad.This high-brightness,energy-controlled betatron source could pave the way to a wide range of applications requiring photons of specific energy,such as phase-contrast imaging in medicine,non-destructive testing and material analysis in industry,and imaging in nuclear physics.
基金supported by the National Natural Science Foundation of China under the Grant No.11965020。
文摘We present complete next-to-leading-order(NLO)QCD correction and electro-weak(EW)correction to the production cross section of Higgs–Boson in association with two hard quark jets by using Monte-Carlo numerical calculation program,HAWK,for various photon parton distribution functions at the Large Hadron Collider with center of mass energy 7,8,13,and 14 TeV without and with typical vector-Boson-fusion cuts on the tagging jets.In our calculation we include complete contribution from the full set of t-channel,u-channel and s-channel Feynman diagrams,and corresponding interferences as well as NLO QCD and EW corrections.
