At the CEPC (Circular Electron Positron Collider), which is proposed by the Chinese high energy physics community, the dominant background comes from radiative Bhabha scattering and the beamstrahlung effect accordin...
Supported by NSAF(11176001);Science and Technology Developing Foundation of China Academy of Engineering Physics(2012A0202006)
The use of minus identity lenses with an angle-cut collimator can achieve high contrast images in highenergy proton radiography.This article presents the principles of choosing the angle-cut aperture of the collimator...
Supported by National Natural Science Foundation of China(11205248)
A new method for analyzing the collimation angle of a neutron Soller collimator is described. A Gaus- sian distribution formula is used to define the angular distribution function of the neutron source and the neutron...
Supported by NSAF(11176001);Science and Technology Developing Foundation of China Academy of Engineering Physics(2012A0202006)
A version of Geant4 has been developed to treat high-energy proton radiography. This article presents the results of calculations simulating the effects of nuclear elastic scattering for various test step wedges. Comp...
Supported by National Natural Science Foundation of China(11105160)
For the research of CCD neutron radiography, a neutron collimator was designed based on the exit of thermal neutron of the Boron Neutron Capture Therapy(BNCT) reactor. Based on the Geant4 simulations, the preliminar...
The rapid cycling synchrotron (RCS) of the China Spallation Neutron Source (CSNS) is a high intensity proton ring with beam power of 100 kW. In order to control the residual activation to meet the requirements of ...
Supported by Science and Technology Research Development Program of CAEP(2010A042016)
Proton radiography is a new tool for advanced hydrotesting. This article will discuss the basic concept of proton radiography first, especially the magnetic lens system. Then a scenario of 50 GeV imaging beamline will...
Supported by the National Natural Science Foundation of China (10735020, 11075026)
A novel thermal neutron collimator was successfully fabricated by coating the inner surface of the capillary plate (CP) with gadolinium oxide using atomic layer deposition (ALD) technology. This CP-based collimato...
Supported by Natural Science Foundation of China(10805049,10775149)
We have built and investigated a detector module for animal SPECT imaging, especially for use in large field of view (FOV) conditions. The module consists of a PMT-based detector and a parallel-hole collimator with ...
Supported by National Natural Science Foundation of China (10635090)
A new SSC (Separated Sector Cyclotron)-Linac is being designed to serve as an injector for the SSC at the HIRFL (Heavy Ion Research Facility Lanzhou). The beam intensity at the LEBT (Low Energy Beam Transport) f...