Speaker
Description
The LANSCE Modernization Project (LAMP) is evaluating necessary upgrades to enable continuous LANSCE operations in years to come and, as a part of LAMP, the H+ and H- 750-kV Cockcroft-Walton (CW) generators will be replaced with a dual-beam, 3-MeV Radiofrequency Quadrupole (RFQ). For technology maturation and expertise associated with this concept, an RFQ test stand with LAMP-like layout is being set-up to demonstrate dual-beam operation in an RFQ with all beam patterns required by the facility. The RFQ test stand will have 35-keV H+ and H- beamlines that are simultaneously injected into a 750-keV RFQ. In order to stabilize the cavity field, a digital low level RF (LLRF) control system is designed and implemented on a Field Programmable Gate Array (FPGA). For the stabilization of the cavity field, a Proportional-Integral (PI) feedback controller is implemented. For the beam loading compensation, a beam emulator is implemented on the digital LLRF control system, where the profile of the beam signal, beam loading time, beam ramp time, beam pulse length, are set to be programmable. The beam emulator output is used for the Proportional-Derivative(PD) type digital beam feedforward controller.
| Abstract Category | Measurement and Control |
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