This paper describes a procedure to set the phase and amplitude of the RF fields in the Spallation Neutron Source (SNS) linac’s superconducting cavities. The linac uses superconducting cavities to accelerate the H ion beam from the normal conducting linac at 185 MeV to a final energy of ~1 GeV. There are two types of cavities in the linac, 33 cavities with a geometric beta of 0.61 and 48 caviti...

Commissioning at the SCRF accelerator at the Fermilab Accelerator Science and Technology (FAST) Facility has included the implementation of a versatile bunch-length monitor located after the 4-dipole chicane bunch compressor for electron beam energies of 20-50 MeV and integrated charges in excess of 10 nC. The team has initially used a Hamamatsu C5680 synchroscan streak camera to assess the eff...

Purpose Radiotherapy plays an important role for the treatment of tumor diseases in two-thirds all cases, but it is limited by side effects surrounding healthy tissue. Proton minibeam radiotherapy (pMBRT) a promising option to widen therapeutic window control at reduced effects. An accelerator concept based on existing tandem Van de Graaff and linac enables focusing 70 MeV protons form minibeam...

The recent achievements in the performance of superconducting RF (SRF) photoinjectors have opened a new era development reliable high-brightness CW electron sources. While SRF guns become one most promising technologies, compatibility environment with complex photocathodes remains on forefront modern accelerator science. cavities operate at cryogenic temperatures providing ultra-high vacuum (UH...

We report a design work of continuous-wave (cw) radio frequency quadrupole (RFQ) for the injector linac High Intensity heavy-ion Accelerator Facility project. The rf and multiphysics analysis were conducted to enhance long-term stability reliability cavity. To minimize peak modified Poynting vector surface electric field associated with breakdown rate, cross section vanes segmentation RFQ cavit...

The bERLinPro project is a compact, c.w. superconducting RF (SRF) energy recovery linac (ERL) that is being built to develop the accelerator physics and technology required to operate the next generation of high current ERLs. The machine is designed to produce a 50 MeV 100 mA beam, with better than 1 mm-mrad emittance. The electron source for the ERL will be a SRF photoinjector equipped with a ...

A Digital Signal Processor-based control system has been designed and tested for use with the ISAC RFQ accelerator. This system uses a direct digital synthesizer and phase-locked loop to generate the 35MHz nominal cavity frequency. One DSP provides both in-phase and quadrature control for the system. A second DSP operates the cavity tuning mechanism. A reference signal with digital controlled p...