Conceptual Design of a Branch Beam Line at HIRFL

In the case of matching the parameters between the SFC and the SSC, a stripper was installed in between the beam transport line connecting the two accelerators. The singly charged beam from SFC will turn into multi-charged one when it goes through the stripper and only the most intensive charged beam particles will be transported to SSC. In order to collect the surplus beam particles with other charge states for experiment as well, a new branch beam line is designed behind the exit of the original BL1-B2 dipole. Fig.l shows the layout of the newly designed beam line (with the dashed components in the figure).     

A Compact Magnetically Insulated Line Oscillator with New-Type Beam Dump

We present a compact improved model of the magnetically insulated line oscillator with new-type beam dump and other novel features. In the experiments, high-power microwave of the TM01 mode is generated from the device with a frequency range of 1.73-1.78 GHz and a peak power level of above 2 GW, when the diode voltage is taken in the range 520-540kV, and the diode current is in the range 58-62kA. This confirms the simulation results.     

High-power, Intense-current DensityPseudospark Electron Beam Drivenby a Modified Pulsed Line Accelerator

l.IntroductionPscudosparkdischargeisakindofgasdischargewhichoccursinaspecialgcometry,theso-calledPseudosparkChambcr(PSC),athighvoltages(lokV~rlMV)andlowpressures(lpa-loopa).ThePSCconsistsofahollo`vcathodeandaplateanodebothwithacommoncentraldischargechannel.Wllenaninsulatorisinsertedbetweenthehollowcathodeandtheanode,thisdeviceiscalledthesinglcgapPSCi``ithstacksofalternativeinsulatorandinter-mediateeleqtrodebeingplaced,itiscallcdthemultiplegapPSC.Thepseudosparkelectronbeamshavebeengenera…     

Non-paraxial Elliptical Gaussian Beam

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Stark Deceleration of an Effusive Molecular Beam by a Single Semi-Gaussian Beam

We propose a novel scheme to decelerate a cw precooled molecular beam by using an optical Stark decelerator, which is composed of a red-detuned cw semi-Gaussian beam. The dynamical process of the optical Stark deceleration for a cw methane molecular beam is studied by Monte Carlo simulations. It is realized that the proposed optical Stark decelerator can be used to continuously slow a cw methane molecular beam with a longitudinal temperature of 30mK, and a maximum reduction in the most probable speed of 0.388m/s （corresponding to a relative change of 9.93%） can be obtained by using a single semi-Gaussian beam with a power of 500W and a maximum central intensity of about 7.96×10^7 W/cm^2.