FEL2012 - List of Authors (van der Meer, A.F.G.)

Paper

Title

Page

Hole-coupling in IR FELs: An Experimental Study

456

A.F.G. van der Meer
FOM Rijnhuizen, Nieuwegein, The Netherlands
A.F.G. van der Meer
Radboud University, Nijmegen, The Netherlands

Even though hole-coupling has been used for many years at several IR FEL facilities, its usefulness as outcoupling scheme has recently been questioned.[1] Also, it has been suggested that the output beam profile will inevitably show strong asymmetries at the short wavelength end of the tuning curve.[2] In this contribution, experimental results for the performance of hole coupling in terms of wavelength and bandwidth tunability, efficiency and beam profile as obtained at the FELIX facility will be presented.
[1] Modeling and operation of an edge-coupled free electron laser, M.D. Shin, TUOC3, FEL2010, Malmø
[2] R. Prazeres et al, Phys. Rev. S.T. A/B, 13 (2010) 090702

MOOB02

First Lasing of the Terahertz FEL FLARE

R.T. Jongma, R. Bakker, C. Berkhout, A.C.N. Engels, R.W. Lof, C. Sikkens, F.J.P. Wijnen, B. Willemsen, G.F.A.J. Wulterkens, P.A.W. van Dael, A.J.A. van Roij, A.P. van Vliet, A.F.G. van der Meer, W.J. van der Zande
Radboud University, Nijmegen, The Netherlands
K. Dunkel, A. Metz, C. Piel
RI Research Instruments GmbH, Bergisch Gladbach, Germany
U. Lehnert
HZDR, Dresden, Germany

Funding: The Nijmegen THz-FEL is funded via the 'Big Facilities' programme of the Netherlands Organisation for Scientific Research (NWO).
Early 2011 we commenced the assembly of FLARE, the Free-electron Laser for Advanced spectroscopy and high-Resolution Experiments, in its dedicated, new building. FLARE will operate as a pulsed FEL in the 100-1500 micron range and is, amongst others, intended for spectroscopy in very high magnetic fields and (bio) molecular spectroscopy [1, 2]. After completion of the move of FELIX and FELICE to the Radboud University, FLARE will operate as part of the FELIX facility Nijmegen. Challenging in the design, assembly and operation of the FLARE cavity are the parallel plate waveguide that extends over the full cavity length and the outcoupling slit. In June 2011 the commissioning of the accelerator and optical cavity of FLARE was started, resulting in first lasing on September 26 of 2011. Since then, FLARE demonstrated lasing between 100 micron and 1400 micron at output powers meeting the design values. Until the end of 2012, the optical distribution system serving all the user-stations as well as the high field magnets in the neighboring HFML will be assembled, after which FLARE will come on-line as part of the new user facility in Nijmegen.
[1] W.J. van der Zande, et. Al. Proc. FEL 2006, Berlin, Germany,
(2006) 485.
[2] R.T. Jongma, et al., Proc. FEL-2008, Gyeongju, South Korea, (2008) 200.

Slides MOOB02 [40.645 MB]

WEOCI01

The Infrared and THz User Facility FELIX in Nijmegen

G. Berden, B. Redlich
FOM Rijnhuizen, Nieuwegein, The Netherlands
R.T. Jongma, F.J.P. Wijnen, A.F.G. van der Meer, W.J. van der Zande
Radboud University, Nijmegen, The Netherlands

The infrared and THz user facility FELIX at the Radboud University Nijmegen will comprise two free electron lasers - namely FLARE, the recently commissioned THz laser at Nijmegen, as well as the FELIX and FELICE laser beam lines, currently relocated from the FOM Institute to Nijmegen. The FELIX (Free Electron Lasers for Infrared eXperiments) facility will offer the international user community a unique wavelength range covering the mid- and far-infrared as well as the THz range from 3 to 1500 micron (3300 - 6 cm^-1 or 100 THz - 0.2 THz). We will discuss the layout of this new facility including the user laboratories as well as some of the special features offered to the users including: (i) the FLARE high spectral resolution mode, (ii) the FELICE intra-cavity configuration for extreme infrared intensities and (iii) the connection of the facility with the adjacent high magnetic field laboratory (HFML). The timeline for the integration of the facility foresees a start of operation in the summer of 2013 and full operation is expected for the beginning of 2014.

Slides WEOCI01 [3.952 MB]

Paper	Title	Page
WEPD40	Hole-coupling in IR FELs: An Experimental Study	456
	A.F.G. van der Meer FOM Rijnhuizen, Nieuwegein, The Netherlands A.F.G. van der Meer Radboud University, Nijmegen, The Netherlands
	Even though hole-coupling has been used for many years at several IR FEL facilities, its usefulness as outcoupling scheme has recently been questioned.[1] Also, it has been suggested that the output beam profile will inevitably show strong asymmetries at the short wavelength end of the tuning curve.[2] In this contribution, experimental results for the performance of hole coupling in terms of wavelength and bandwidth tunability, efficiency and beam profile as obtained at the FELIX facility will be presented. [1] Modeling and operation of an edge-coupled free electron laser, M.D. Shin, TUOC3, FEL2010, Malmø [2] R. Prazeres et al, Phys. Rev. S.T. A/B, 13 (2010) 090702

MOOB02	First Lasing of the Terahertz FEL FLARE
	R.T. Jongma, R. Bakker, C. Berkhout, A.C.N. Engels, R.W. Lof, C. Sikkens, F.J.P. Wijnen, B. Willemsen, G.F.A.J. Wulterkens, P.A.W. van Dael, A.J.A. van Roij, A.P. van Vliet, A.F.G. van der Meer, W.J. van der Zande Radboud University, Nijmegen, The Netherlands K. Dunkel, A. Metz, C. Piel RI Research Instruments GmbH, Bergisch Gladbach, Germany U. Lehnert HZDR, Dresden, Germany
	Funding: The Nijmegen THz-FEL is funded via the 'Big Facilities' programme of the Netherlands Organisation for Scientific Research (NWO). Early 2011 we commenced the assembly of FLARE, the Free-electron Laser for Advanced spectroscopy and high-Resolution Experiments, in its dedicated, new building. FLARE will operate as a pulsed FEL in the 100-1500 micron range and is, amongst others, intended for spectroscopy in very high magnetic fields and (bio) molecular spectroscopy [1, 2]. After completion of the move of FELIX and FELICE to the Radboud University, FLARE will operate as part of the FELIX facility Nijmegen. Challenging in the design, assembly and operation of the FLARE cavity are the parallel plate waveguide that extends over the full cavity length and the outcoupling slit. In June 2011 the commissioning of the accelerator and optical cavity of FLARE was started, resulting in first lasing on September 26 of 2011. Since then, FLARE demonstrated lasing between 100 micron and 1400 micron at output powers meeting the design values. Until the end of 2012, the optical distribution system serving all the user-stations as well as the high field magnets in the neighboring HFML will be assembled, after which FLARE will come on-line as part of the new user facility in Nijmegen. [1] W.J. van der Zande, et. Al. Proc. FEL 2006, Berlin, Germany, (2006) 485. [2] R.T. Jongma, et al., Proc. FEL-2008, Gyeongju, South Korea, (2008) 200.
	Slides MOOB02 [40.645 MB]

WEOCI01	The Infrared and THz User Facility FELIX in Nijmegen
	G. Berden, B. Redlich FOM Rijnhuizen, Nieuwegein, The Netherlands R.T. Jongma, F.J.P. Wijnen, A.F.G. van der Meer, W.J. van der Zande Radboud University, Nijmegen, The Netherlands
	The infrared and THz user facility FELIX at the Radboud University Nijmegen will comprise two free electron lasers - namely FLARE, the recently commissioned THz laser at Nijmegen, as well as the FELIX and FELICE laser beam lines, currently relocated from the FOM Institute to Nijmegen. The FELIX (Free Electron Lasers for Infrared eXperiments) facility will offer the international user community a unique wavelength range covering the mid- and far-infrared as well as the THz range from 3 to 1500 micron (3300 - 6 cm^-1 or 100 THz - 0.2 THz). We will discuss the layout of this new facility including the user laboratories as well as some of the special features offered to the users including: (i) the FLARE high spectral resolution mode, (ii) the FELICE intra-cavity configuration for extreme infrared intensities and (iii) the connection of the facility with the adjacent high magnetic field laboratory (HFML). The timeline for the integration of the facility foresees a start of operation in the summer of 2013 and full operation is expected for the beginning of 2014.
	Slides WEOCI01 [3.952 MB]