|The LCLS-II, a New FEL Facility at SLAC
Funding: This work supported under DOE Contract DE-AC02-76SF00515.
The LCLS-II is a new FEL facility at SLAC based on the existing LCLS-I and a new CW superconducting RF linac. Using two undulators, the LCLS-II will generate X-rays between 0.2 and 5 keV at rates up to 1 MHz and X-rays as high as 25 keV at 120 Hz. The SCRF linac will have an rf frequency of 1.3 GHz and is based heavily on the technology developed for the EuFEL and the International Linear Collider. The facility is being constructed by a collaboration consisting of SLAC, LBNL, Jefferson Lab, Fermilab and Cornell University. This talk will describe the LCLS-II layout and expected performance along with the major challenges.
|Slides WEB01 [20.316 MB]
|Beam Operation of the PAL-XFEL Injector Test Facility
|The Pohang Accelerator Laboratory X-ray Free electron Laser (PAL-XFEL) project was launched in 2011. This project aims at the generation of X-ray FEL radiation in a range of 0.1 to 10 nm for photon users with a bunch repetition rate of 60 Hz. The machine consists of a 10 GeV normal conducting S-band linear accelerator and five undulator beamlines. The linac and two undulator beamlines will be constructed by the end of 2015 and first FEL radiation is expected in 2016. As a part of preparation for the project, an Injector Test Facility was constructed in 2012. Since December 2012, beam commissioning is being carried out to find optimum operating conditions and to test accelerator components including RF, laser, diagnostics, magnet, vacuum and control. We present the status of beam commissioning and components tests at the test facility.
|Slides WEB02 [10.249 MB]
|European XFEL Construction Status
|The European XFEL is presently constructed in the Hamburg region, Germany. It aims at producing X-rays in the range from 260 eV up to 24 keV out of three undulators that can be operated simultaneously with up to 27000 pulses/second. The FEL is driven by a 17.5 GeV linear accelerator based on TESLA-type superconducting accelerator modules. This paper presents the status of major components, the present project schedule and a summary of beam parameters that are adapted to the evolving needs of the users.
|Slides WEB03 [12.982 MB]
|The New IR FEL Facility at the Fritz-Haber-Institut in Berlin
A mid-infrared oscillator FEL has been commissioned at the Fritz-Haber-Institut. The accelerator consists of a thermionic gridded gun, a subharmonic buncher and two S-band standing-wave copper structures [1,2]. It provides a final electron energy adjustable from 15 to 50 MeV, low longitudinal (<50 keV-ps) and transverse emittance (<20 π mm-mrad), at more than 200 pC bunch charge with a micro-pulse repetition rate of 1 GHz and a macro-pulse length of up to 15 μs. Regular user operation started in Nov. 2013 with 6 user stations. Pulsed radiation with up to 100 mJ macro-pulse energy at about 0.5% FWHM bandwidth is routinely produced in the wavelength range from 4 to 48 μm. We will describe the FEL design and its performance as determined by IR power, bandwidth, and micro-pulse length measurements. Further, an overview of the new FHI FEL facility and first user results will be given. The latter include, for instance, spectroscopy of bio-molecules (peptides and small proteins) conformer selected or embedded in superfluid helium nano-droplets at 0.4 K, as well as vibrational spectroscopy of mass-selected metal-oxide clusters and protonated water clusters in the gas phase.
 W. Schöllkopf et al., MOOB01, Proc. FEL 2012.
 W. Schöllkopf et al., WEPSO62, Proc. FEL 2013.
|Slides WEB04 [12.785 MB]
|FLASH: First Soft X-ray FEL Operating Two Undulator Beamlines Simultaneously
|FLASH, the free electron laser user facility at DESY (Hamburg, Germany), has been upgraded with a second undulator beamline FLASH2. After a shutdown to connect FLASH2 to the FLASH linac, FLASH1 is back in user operation since February 2014. Installation of the FLASH2 electron beamline has been completed early 2014, and the first electron beam was transported into the new beamline in March 2014. The commissioning of FLASH2 takes place in 2014 parallel to FLASH1 user operation. This paper reports the status of the FLASH facility, and the first experience of operating two FEL beamlines.
|Slides WEB05 [2.481 MB]
|Introduction to the Paul Scherrer Institut Visit
|The Paul Scherrer Institute, PSI, is the largest research centre for natural and engineering sciences within Switzerland. The tour will consist in visiting three main sites of PSI: the Swiss Light Source (SLS), the SwissFEL Injector Test Facility (SITF) and the SwissFEL construction site. The latest being only a vista point on the on-going construction which is reached after a short walk through the forest. The lab visit will be followed by a Swiss evening at PSI where you will discover different cultural and culinary aspects of Switzerland.
|Slides WEB06 [14.179 MB]