نتایج جستجو برای: optical klystron
تعداد نتایج: 266878 فیلتر نتایج به سال:
In the framework of Compact Light XLS project, a short ultra-high gradient linearizer working on third harmonic main linac frequency is requested. Increasing gradients and reducing dimensions are requirements for all next generation linear accelerators. Actually, ultra-compact normal conducting accelerating structures, operating in Ka-band required to achieve research, industrial medical applic...
We have studied a conventional pulse transformer for the NLC klystron pulse modulator. The transformer has been analyzed using a simplified lumped circuit model. It is found that a fast rise time requires low leakage inductance and low distributed capacitance and can be realized by reducing the number of secondary turns, but it produces larger pulse droop and core size. After making a tradeoff ...
Experimental work is now under way by collaborators at LLNL, SLAC, and LBL to invest igate re lat ivist ic k lystrons as a possible rf power source for future highgradient accelerators. We have learned how to overcome our previously reported problem of high-power rf pulse shortening and have achieved peak rf power levels of 290 MW. We have used the rf from a relativistic klystron to power a sho...
An X band klystron using a sheet beam and wiggler focusing was simulated using the 2 + t dimensional particle in cell code MASK.’ Simulation of the rf cavities was by means of the port approximation used in modell ing of standard klystrons.2 The wigglers, which would need permanent magnets to achieve the required field strengths, were modelled using an idealized analytic expression with an expo...
Design of the buncher cavity for Cornell / JLab ERL project is presented. This is a reentrant spherical copper cavity at a frequency of 1300 MHz. It will be installed between a 500 keV electron gun and superconducting accelerating sections in the injector part of ERL. The cavity has Q of 20,000 and a shunt impedance of 2.1 MOhm. For a design cavity voltage of 200 kV, power dissipated in cavity ...
The Low Energy Neutron Source (LENS) at Indiana University produced its first neutrons in late 2004, and has been engaged in a series of facility upgrades since that time. Among the important developments over the past two years have been the commissioning of klystron-based RF systems, the demonstration of beam peak proton beam currents of more than 20mA, and the low-power operation of a methan...
Inter-digital line antennas are being used to test the feasibility of lower hybrid current drive in MST. The antennas use !/4 resonators and launch slow waves at 800 MHz with n|| ~ 7.5. Routine operation has been achieved with a good impedance match between antenna and plasma. High power antenna design improvements include larger vacuum feedthroughs, better impedance matching, and rf instrument...
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