Radiation characteristics of a Free-Electron Laser (FEL)
such as pulse length, time structure, intensity, bandwidth,
wavelength, power, frequency, etc., which were measured on a
diagnostics table, are thoroughly discussed. In this respect, pulse
length measurements of an Infrared FEL (IR-FEL) beam are evaluated
through an intensity autocorrelator, designed and installed as a
diagnostics tool at the “Helmholtz-Zentrum Dresden-Rossendorf
(HZDR)-Radiation Source ELBE” of Germany. In addition, the
autocorrelator was designed as a unique, cost-effective, and
in-house setup. It operates within the wavelength range of
3–35 microns, using Cadmium-Telluride (CdTe) crystals in the Second
Harmonic Generation (SHG) medium. The intensity autocorrelation
curves were obtained for the FEL beam with the wavelength of
26.2 microns, indicating an FWHM pulse duration ranging between
3.29–8.03 ps with different optical cavity detuning
values. Furthermore, the pulse duration of Ti: sapphire laser beam
is measured between 1–3 ps through the designed autocorrelator at
the ELBE light source. On the other hand, the setup may pave the way
for pulse length measurements of the Turkish infrared FEL-oscillator
facility (TARLA) as well, which is currently under the hardware
installation phase. Finally, it is elaborated in section 3 that the
unique autocorrelator design fully meets all requirements for pulse
length measurements of an infrared FEL source.
A proton beamline consisting of an inductively coupled plasma (ICP) source, two solenoid magnets, two steerer magnets and a radio frequency quadrupole (RFQ) is developed at the Turkish Atomic Energy Authority's (TAEA) Saraykoy Nuclear Research and Training Center (SNRTC-SANAEM) in Ankara. In Q4 of 2016, the RFQ was installed in the beamline. The high power tests of the RF power supply and the RF transmission line were done successfully. The high power RF conditioning of the RFQ was performed recently. The 13.56 MHz ICP source was tested in two different conditions, CW and pulsed. The characterization of the proton beam was done with ACCTs, Faraday cups and a pepper-pot emittance meter. Beam transverse emittance was measured in between the two solenoids of the LEBT. The measured beam is then reconstructed at the entrance of the RFQ by using computer simulations to determine the optimum solenoid currents for acceptance matching of the beam. This paper will introduce the pulsed beam test results at the SANAEM RFQ beamline. In addition, the high power RF conditioning of the RFQ will be discussed.
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