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LBNL, Berkeley, California, USA
SLAC, Menlo Park, California, USA
JLAB, Newport News, Virginia, USA
Fermilab, Batavia, USA
We present an overview of design studies and R&D toward NGLS a Next Generation Light Source initiative at LBNL. The design concept is based on a multi-beamline soft x-ray FEL array powered by a CW superconducting linear accelerator, and operating with a high bunch repetition rate of approximately 1 MHz. The linac design uses TESLA and ILC technology, supplied by an injector based on a CW normal-conducting VHF photocathode electron gun. Electron bunches from the linac are distributed by RF deflecting cavities to the array of independently configurable FEL beamlines with nominal bunch rates of ~100 kHz in each FEL, with uniform pulse spacing, and some FELs capable of operating at the full linac bunch rate. Individual FELs may be configured for different modes of operation, including self-seeded and external-laser-seeded, and each may produce high peak and average brightness x-rays with a flexible pulse format.
Fermilab, Batavia, USA
CM2 is the second 1.3GHz Cryomodule assembled at the Cryomodule Assembly Facility (CAF) in Fermi National Accelerator Laboratory. The string has a doublet magnet, beam position monitor and eight cavities. All the cavities are qualified at 35 MV / m gradient at the Horizontal Test Facility before assembly. The dressed cavities were outfitted with magnetic shielding, blade tuner, and the cold mass was assembled based on the Tesla TTF Type III+ cryomodule design. CM2 is currently being installed into the test stand in NML where it will be cooled down and high power tested. CM2 will also be the first cryomodule that an electron beam will be put through at the NML facility. This will be a proof of principle for the planned Advanced Superconducting Test Accelerator (ASTA) facility at NML. This paper describes the assembly steps, the quality assurance methods and the challenges that we experienced during assembly and qualification steps at CAF. De
Fermilab, Batavia, USA
VECC, Kolkata, India
Project X is a proposed proton accelerator complex intended to support Fermilab’s role in intensity frontier research over the next several decades. It will replace the existing 40-year old Fermilab injector complex and add powerful new capabilities to support a large number of experiments in the energy range from 1 to 120 GeV. Fermilab is planning a program of research and development aimed at testing of critical components. This program, known as the Project X Injector Experiment (PXIE), is being undertaken as a major element of the ongoing Project X R&D program. PXIE contains two superconducting cavity cryomodules, one utilizing half-wave resonators (HWR), and the other, single spoke resonators (SSR). The first SSR cryomodule, known as SSR1 contains eight cavities and four solenoids in the following order: C–SC–CS–CC–SC–CS–C, as well as focusing and steering magnet elements. This paper describes the design of the SSR1 cryomodule and includes discussions of the system interfaces, vacuum vessel, magnetic and thermal shields, insulating and support systems, cavities, tuners, input couplers, focusing elements, and current leads.